DOCSLIB.ORG

Alexandroff-Dissertation

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Alexandroff-Dissertation SEARCHING FOR QUASAR FEEDBACK IN OBSCURED AND RED QUASARS AT THE PEAK OF GALAXY FORMATION by Rachael M. Alexandroff A dissertation submitted to The Johns Hopkins University in conformity with the requirements for the degree of Doctor of Philosophy. Baltimore, Maryland July, 2017 c Rachael M. Alexandroff 2017 All rights reserved Abstract Though small on the scale of their host galaxy, supermassive black holes likely play a crucial role in galaxy evolution. A galaxy-scale effect driven by supermassive black holes (or \quasar feedback) is necessary to stop the production of too many massive galaxies in semi-analytical simulations and to drive observational correlations between host galaxy and black hole properties. Nevertheless, such a mechanism is not yet well supported by observational evidence, especially at the peak of galaxy formation. This thesis represents an effort to ground every aspect of quasar feedback at the peak of galaxy formation with strong observational evidence. I first define a sample of obscured and actively accreting supermassive black holes (\quasars) at the peak of galaxy formation using the Sloan Digital Sky Survey. Then, using targeted observations of small sub-samples of these objects across a variety of wavelengths, I show that in a sample of the most luminous quasars, we see emerging evidence for quasar feedback. I show that luminous quasars are capable of launching winds by studying their scattering geometry and kinematics using spectropolarimetry. I advance the theory that sensitive, high resolution radio observations allow us to search ii ABSTRACT for the presence of such winds on galaxy scales. Finally, I show that these winds go on to clear their host galaxies of the molecular gas necessary for star formation. All together, this body of work provides a robust observational window into important mechanisms of galaxy growth and quenching at the peak of galaxy formation and evolution. Primary Reader: Prof. Nadia Zakamska Secondary Reader: Prof. Timothy Heckman iii Acknowledgments First I would like to acknowledge my gratitude to Prof. Nadia Zakamska, who was the best thesis advisor that anyone could ask for. Thank you for your lengthy and critical discussions of various project ideas and hypotheses and for encouraging me to diligently work to understand the physics behind every observation. Thank you perhaps most of all for giving me the freedom to pursue those questions that interested me the most. Thank you also to the wonderful Zakamska research group (Guilin, Dominika, Kate, Kirsten, Erini, and Hsiang-Chih) for your support and assistance on a variety of topics. Thank you also to Prof. Tim Heckman, for allowing me to pursue my interest in Lyman Break Galaxy analogs and for being an additional source of support and to Prof. Julian Krolik for supporting me as the third member of my thesis committee. Thank you in addition to the department for their financial support during my first year. Thanks also to my fellow graduate students for making my time at JHU some of the best years of my life. I would also be remiss if I didn't thank my collaborators outside of Johns Hopkins: Prof. Michael Strauss, Prof. Jenny Greene, Dr. Andy Goulding and Dr. Sean iv ACKNOWLEDGMENTS Johnson at Princeton University, Prof. Fred Hamann at the University of California Riverside, Prof. Aaron Bath at the University of California Irvine, Dr. Nic Ross at the University of Edinburgh, Dr. Isabelle Paris at the Laboratoire d'Astrophysique de Marseille, Prof. Niel Brandt at Pennsylvania State University and Dr. Ai-Lei Sun at the Academia Sinica Institute of Astronomy and Astrophysics. My work has relied on access to a number of telescope facilities around the world. I want to acknowledge the use of data from the Sloan Digital Sky Survey, the Faint Images of the Radio Sky at Twenty-Centimeters, and the Wide-Field Infrared Survey Explorer at the NASA/IPAC Infrared Science Archive. I would also like to acknowl- edge the facilities through which I obtained data for this thesis including the Apache Point Observatory, the Gemini Observatory, the Keck Observatory, and the Very Large Array. I wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indige- nous Hawaiian community; I was fortunate to be able to conduct observations on the mountain using the Keck Telescope. Thank you to all of my friends and family for your unflagging support as I pursued the dream I have had since I was seven. From Dr. Alan Alexandroff's lectures on graduating to Dr. Carole Cohen's unfailing telephone support and Miriam's text messages I couldn't have done it without you. Also thank you to my boyfriend Ben for spending weekends in Bloomberg and for convincing me to take a break. v Dedication This thesis is dedicated to my family and friends who have supported me unfail- ingly even when every day was \quasar day". vi Contents Abstract ii Acknowledgments iv List of Tables xii List of Figures xiii 1 Introduction 1 2 Candidate Type II Quasars at 2 < z < 4:3 in the Sloan Digital Sky Survey III 6 2.1 Introduction . 7 2.2 SDSS Observations and Data Processing . 12 2.3 Sample Selection Criteria . 13 2.4 Properties of Type II Quasar Candidates: SDSS Data . 17 2.4.1 Broadband Colors . 25 vii CONTENTS 2.4.2 Composite Spectrum . 29 2.4.3 Comparison to Other Samples of Obscured Quasars . 34 2.4.4 Associated Absorption . 39 2.5 Sample Properties from Radio to X-Ray . 41 2.5.1 Radio: Faint Images of the Radio Sky at 20cm . 43 2.5.2 Mid-Infrared: Wide-Field Infrared Survey Explorer (WISE) . 44 2.5.3 Mid-Infrared: Spitzer MIPS-24 . 49 2.5.4 X-Ray: XMM-Newton, Chandra and ROSAT . 51 2.5.5 Cosmic Evolution Survey . 54 2.5.6 Optical polarization . 57 2.6 Discussion . 63 2.7 Conclusions . 66 3 Sensitive radio survey of obscured quasar candidates 69 3.1 Introduction . 70 3.2 Sample Selection, Observations and Data Reduction . 75 3.2.1 Sample Selection and Observations . 75 3.2.2 Data Reduction and Analysis . 77 3.2.3 CLEAN bias . 78 3.3 High redshift quasars . 79 viii CONTENTS 3.3.1 FIRST and VLA observations of high-redshift obscured quasar candidates . 80 3.3.2 Implications . 84 3.4 Low redshift quasars . 88 3.4.1 FIRST and VLA observations of z < 1 quasars . 89 3.4.2 Discussion of low-redshift results . 95 3.4.2.1 Implications from radio morphology and [OIII] kine- matics . 96 3.4.2.2 Implications from radio spectral indices . 98 3.4.2.3 Equipartition and Pressure Balance . 101 3.4.3 Conclusions . 102 3.5 Source Populations . 105 3.5.1 Resolved Sources . 108 3.5.2 Source Counts . 109 3.5.3 Spectral Indices . 111 3.5.4 Cross-matching with the SDSS data . 113 3.5.5 Cross-matching with WISE data . 118 3.5.6 Star Formation Rates . 120 3.5.7 Summary and discussion of the study of faint radio sources . 123 3.6 Interesting sources . 125 3.6.1 Dual AGN . 125 ix CONTENTS 3.6.2 Objects with interesting structure in radio images . 126 3.7 Discussion and conclusions . 128 4 Spectropolarimetry of High Redshift Obscured and Red Quasars 138 4.1 Introduction . 139 4.2 Sample Selection, Observations and Data Reduction . 143 4.2.1 Parent Sample . 143 4.2.2 Rest-frame Optical Properties . 147 4.2.3 Observations and Data Reduction . 151 4.3 Results . 156 4.3.1 Level of Continuum Polarization . 156 4.3.2 Wavelength Dependence of Continuum Polarization . 164 4.3.3 Overall Polarization of Emission Lines . 165 4.3.4 Kinematics of Line Polarization . 168 4.4 Discussion . 174 4.4.1 Proposed Model . 175 4.4.2 Continuum Polarization and Scattering Geometry . 179 4.4.3 Line Polarization . 184 4.4.4 Resonant Scattering? . 188 4.5 Conclusions . 190 4.6 Acknowledgments . 192 x CONTENTS 5 Molecular Gas in Obscured and Red Quasars at z∼ 2.5 194 5.1 Introduction . 195 5.2 Sample Selection . 198 5.3 Observations & Data Reduction . 202 5.3.1 Observations . 202 5.3.2 Data Reduction . 203 5.4 Continuum Measurements . 204 5.4.1 FIRST Detections . 204 5.4.2 VLA 33 GHz Detections . 207 5.5 Line Measurements . 209 5.5.1 Evidence for suppression of low-J transitions? . 212 5.5.2 Evidence of gas depletion? . 214 5.6 Conclusions . 215 Vita 255 xi List of Tables 2.1 Selection of Type II Candidates . 14 2.2 Table of 145 class A candidate Type II quasars . 23 2.3 Table of 307 class B candidate Type II quasars. 24 2.4 Measured emission line fluxes from the composite spectra of our Class A, Class B and NLS1 samples. 31 2.5 Measured emission line widths (FWHM) from the composite spectra. 32 2.6 FIRST Survey radio detections of Class A and Class B candidates. 44 2.7 All WISE matches in our Class A sample. 48 2.8 All WISE matches in our Class B sample. 48 2.9 Spitzer 24µm Data . 51 2.10 X-Ray detections of Type II quasar candidates by Chandra, ROSAT, and XMM-Newton . 53 3.1 High Redshift Sample Properties at 6.0GHz . 79 3.2 Low Redshift Sample Properties at 6.0 and 1.4 GHz . 104 3.3 Sample Properties for serendipitous detections in our 6.0GHz radio fields.136 4.1 Basic properties of our obscured and highly reddened quasar targets for spectropolarimetry observation on Keck with LRISp.
Load more

Recommended publications
  • Ann Arbor AAPT 2009
    AnnAAPT 09 Asummerrbor meeting First Time at an AAPT Meeting? ...4 AAPT 2009 Meeting Information .....................6 Summer Meeting Bus Schedule/information ............8 Welcome to Ann Arbor ...............10 Special Events ...........................12 July 25–29 Awards/Plenaries ........................14 Committee Meetings ..................20 University of Michigan Exhibitor Information ..................21 Ann Arbor Commercial Workshops .............25 Meeting at a Glance ...................26 Session Finder ............................30 www.aapt.org Workshops .................................33 SESSION ABSTRACTS Sunday ..................................39 Monday .................................41 Tuesday .................................82 American Association of Physics Teachers Wednesday ..........................126 One Physics Ellipse College Park, MD 20740 Index of Contributors ...............144 301-209-3300, fax: 301-209-0845 Index of Advertisers .................146 [email protected], www.aapt.org Our Donors ...............................147 Map of Exhibit Hall ...................148 Welcome to Ann Arbor and the University of Michigan! This summer’s AAPT meeting offers about three dozen workshops and seven dozen sessions on a wide variety of topics; the apparatus, photo, and video contests; exhibits by numerous vendors of books and equipment; the traditional picnic and demo show; and the great book give-away. In addition (and of particular importance), 18 area committee meetings offer attendees an invaluable opportunity
    [Show full text]
  • Cfa in the News ~ Week Ending 3 January 2010
    Wolbach Library: CfA in the News ~ Week ending 3 January 2010 1. New social science research from G. Sonnert and co-researchers described, Science Letter, p40, Tuesday, January 5, 2010 2. 2009 in science and medicine, ROGER SCHLUETER, Belleville News Democrat (IL), Sunday, January 3, 2010 3. 'Science, celestial bodies have always inspired humankind', Staff Correspondent, Hindu (India), Tuesday, December 29, 2009 4. Why is Carpenter defending scientists?, The Morning Call, Morning Call (Allentown, PA), FIRST ed, pA25, Sunday, December 27, 2009 5. CORRECTIONS, OPINION BY RYAN FINLEY, ARIZONA DAILY STAR, Arizona Daily Star (AZ), FINAL ed, pA2, Saturday, December 19, 2009 6. We see a 'Super-Earth', TOM BEAL; TOM BEAL, ARIZONA DAILY STAR, Arizona Daily Star, (AZ), FINAL ed, pA1, Thursday, December 17, 2009 Record - 1 DIALOG(R) New social science research from G. Sonnert and co-researchers described, Science Letter, p40, Tuesday, January 5, 2010 TEXT: "In this paper we report on testing the 'rolen model' and 'opportunity-structure' hypotheses about the parents whom scientists mentioned as career influencers. According to the role-model hypothesis, the gender match between scientist and influencer is paramount (for example, women scientists would disproportionately often mention their mothers as career influencers)," scientists writing in the journal Social Studies of Science report (see also ). "According to the opportunity-structure hypothesis, the parent's educational level predicts his/her probability of being mentioned as a career influencer (that ism parents with higher educational levels would be more likely to be named). The examination of a sample of American scientists who had received prestigious postdoctoral fellowships resulted in rejecting the role-model hypothesis and corroborating the opportunity-structure hypothesis.
    [Show full text]
  • Arxiv:1707.07134V1 [Astro-Ph.GA] 22 Jul 2017 2 Radio-Selected AGN
    Astronomy Astrophysics Review manuscript No. (will be inserted by the editor) Active Galactic Nuclei: what’s in a name? P. Padovani · D. M. Alexander · R. J. Assef · B. De Marco · P. Giommi · R. C. Hickox · G. T. Richards · V. Smolciˇ c´ · E. Hatziminaoglou · V. Mainieri · M. Salvato Received: June 12, 2017 / Accepted: July 21, 2017 Abstract Active Galactic Nuclei (AGN) are energetic as- sic differences between AGN, and primarily reflect varia- trophysical sources powered by accretion onto supermassive tions in a relatively small number of astrophysical parame- black holes in galaxies, and present unique observational ters as well the method by which each class of AGN is se- signatures that cover the full electromagnetic spectrum over lected. Taken together, observations in different electromag- more than twenty orders of magnitude in frequency. The netic bands as well as variations over time provide comple- rich phenomenology of AGN has resulted in a large number mentary windows on the physics of different sub-structures of different “flavours” in the literature that now comprise a in the AGN. In this review, we present an overview of AGN complex and confusing AGN “zoo”. It is increasingly clear multi-wavelength properties with the aim of painting their that these classifications are only partially related to intrin- “big picture” through observations in each electromagnetic band from radio to γ-rays as well as AGN variability. We P. Padovani · E. Hatziminaoglou · V. Mainieri address what we can learn from each observational method, European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 the impact of selection effects, the physics behind the emis- Garching bei Munchen,¨ Germany sion at each wavelength, and the potential for future studies.
    [Show full text]
  • Not Yet Imagined: a Study of Hubble Space Telescope Operations
    NOT YET IMAGINED A STUDY OF HUBBLE SPACE TELESCOPE OPERATIONS CHRISTOPHER GAINOR NOT YET IMAGINED NOT YET IMAGINED A STUDY OF HUBBLE SPACE TELESCOPE OPERATIONS CHRISTOPHER GAINOR National Aeronautics and Space Administration Office of Communications NASA History Division Washington, DC 20546 NASA SP-2020-4237 Library of Congress Cataloging-in-Publication Data Names: Gainor, Christopher, author. | United States. NASA History Program Office, publisher. Title: Not Yet Imagined : A study of Hubble Space Telescope Operations / Christopher Gainor. Description: Washington, DC: National Aeronautics and Space Administration, Office of Communications, NASA History Division, [2020] | Series: NASA history series ; sp-2020-4237 | Includes bibliographical references and index. | Summary: “Dr. Christopher Gainor’s Not Yet Imagined documents the history of NASA’s Hubble Space Telescope (HST) from launch in 1990 through 2020. This is considered a follow-on book to Robert W. Smith’s The Space Telescope: A Study of NASA, Science, Technology, and Politics, which recorded the development history of HST. Dr. Gainor’s book will be suitable for a general audience, while also being scholarly. Highly visible interactions among the general public, astronomers, engineers, govern- ment officials, and members of Congress about HST’s servicing missions by Space Shuttle crews is a central theme of this history book. Beyond the glare of public attention, the evolution of HST becoming a model of supranational cooperation amongst scientists is a second central theme. Third, the decision-making behind the changes in Hubble’s instrument packages on servicing missions is chronicled, along with HST’s contributions to our knowledge about our solar system, our galaxy, and our universe.
    [Show full text]
  • Arxiv:1705.07631V1 [Astro-Ph.GA] 22 May 2017 ⋆ As Generally Is Feedback of Th Type Heat This Bubbles Medium
    Mon. Not. R. Astron. Soc. 000, 1–15 (2017) Printed 23 May 2017 (MN LATEX style file v2.2) An infrared view of AGN feedback in a type-2 quasar: the case of the Teacup galaxy C. Ramos Almeida1,2⋆, J. Piqueras L´opez3,4,5, M. Villar-Mart´ın3,4, P. S. Bessiere6 1Instituto de Astrof´ısica de Canarias, Calle V´ıa L´actea, s/n, E-38205, La Laguna, Tenerife, Spain 2Departamento de Astrof´ısica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain 3Centro de Astrobiolog´ıa (INTA-CSIC), Carretera de Ajalvir, km 4, E-28850, Torrej´on de Ardoz, Madrid, Spain 4Astro-UAM, UAM, Unidad Asociada CSIC, Facultad de Ciencias, Campus de Cantoblanco, E-28049, Madrid, Spain 5Department of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, UK 6Instituto de Astrof´ısica, Facultad de F´ısica, Pontificia Universidad Cat´olica de Chile, Casilla 306, Santiago 22, Chile ABSTRACT We present near-infrared integral field spectroscopy data obtained with VLT/SINFONI of “the Teacup galaxy”. The nuclear K-band (1.95–2.45 µm) spectrum of this radio-quiet type-2 quasar reveals a blueshifted broad component of FWHM∼1600-1800 km s−1 in the hydrogen recombination lines (Paα, Brδ, and Brγ) and also in the coronal line [Si VI]λ1.963 µm. Thus the data confirm the presence of the nuclear ionized outflow previously detected in the optical and reveal its coronal counterpart. Both the ionized and coronal nuclear outflows are resolved, with seeing-deconvolved full widths at half maximum of 1.1±0.1 and 0.9±0.1 kpc along PA∼72◦–74◦.
    [Show full text]
  • SALT Spectroscopic Observations of Galaxy Clusters Detected by ACT and a Type II Quasar Hosted by a Brightest Cluster Galaxy
    Mon. Not. R. Astron. Soc. 000, 1–11 (2015) Printed 29 July 2018 (MN LATEX style file v2.2) SALT spectroscopic observations of galaxy clusters detected by ACT and a Type II quasar hosted by a brightest cluster galaxy Brian Kirk,1;2? Matt Hilton,1;3† Catherine Cress,2;4 Steven M. Crawford,5 John P. Hughes,6 Nicholas Battaglia,7 J. Richard Bond,8 Claire Burke,1 Megan B. Gralla,9 Amir Hajian,8 Matthew Hasselfield,10 Adam D. Hincks,11 Leopoldo Infante,12 Arthur Kosowsky,13 Tobias A. Marriage,9 Felipe Menanteau,14 Kavilan Moodley,1 Michael D. Niemack,15 Jonathan L. Sievers,16 Cristóbal Sifón,17 Susan Wilson,1 Edward J. Wollack,18 and Caroline Zunckel16 1 Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Durban 4041, SA 2 Centre for High Performance Computing, CSIR Campus, 15 Lower Hope St. Rosebank, Cape Town, SA 3 Centre for Astronomy & Particle Theory, School of Physics and Astronomy, University of Nottingham, NG7 2RD, UK 4 Department of Physics, University of Western Cape, Bellville 7530, Cape Town, SA 5 South African Astronomical Observatory, P.O. Box 9, Observatory 7935, Cape Town, SA 6 Department of Physics and Astronomy, Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ USA 08854-8019 7 McWilliams Center for Cosmology, Carnegie Mellon University, Department of Physics, 5000 Forbes Ave., Pittsburgh PA, USA, 15213 8 Canadian Institute for Theoretical Astrophysics, 60 St George, Toronto ON, Canada, M5S 3H8 9 Department of Physics and Astronomy, Johns Hopkins University, 3400 N.
    [Show full text]
  • Centro De Astrobiología (CSIC-INTA) Annual Report 2017
    Centro de Astrobiología (CSIC-INTA) Annual Report 2017 Annual Report CAB 2017 Table of contents INTRODUCCIÓN ............................................................................................................ 2 INTRODUCTION ............................................................................................................ 3 I INSTITUTE ORGANIZATION ................................................................................... 4 GOVERNING COUNCIL ............................................................................................ 4 DIRECTION AND CENTER EXECUTIVE BOARD ................................................ 5 ADVISORY BOARD .................................................................................................. 6 RESEARCH DEPARTMENTS ................................................................................... 6 Astrophysics ............................................................................................................. 6 Planetology and Habitability .................................................................................... 7 Molecular Evolution ................................................................................................. 8 Advanced Instrumentation ...................................................................................... 10 SUPPORT UNITS ...................................................................................................... 11 II RESEARCH ACTIVITIES .......................................................................................
    [Show full text]
  • A Near-Infrared Study of the Multi-Phase Outflow in the Type-2
    The multi-phase outflow of J1509+0434 1 A near-infrared study of the multi-phase outflow in the type-2 Downloaded from https://academic.oup.com/mnrasl/advance-article-abstract/doi/10.1093/mnrasl/slz072/5492262 by University of Cambridge user on 31 May 2019 quasar J1509+0434 C. Ramos Almeida1,2⋆ , J. A. Acosta-Pulido1,2, C. N. Tadhunter3, C. González- Fernández4, C. Cicone5, and M. Fernández-Torreiro2 1Instituto de Astrofísica de Canarias, Calle Vía Láctea, s/n, E-38205, La Laguna, Tenerife, Spain 2Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain 3Department of Physics & Astronomy, University of Sheffield, Sheffield S3 7RH, UK 4Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK 5INAF - Osservatorio Astronomico di Brera, Via Brera 28, I-20121 Milano, Italy ABSTRACT Based on new near-infrared spectroscopic data from the instrument EMIR on the 10.4 m Gran Telescopio Ca- narias (GTC) we reportthe presence of an ionized and warm molecular outflow in the luminous type-2 quasar J150904.22+043441.8 (z = 0.1118). The ionized outflow is faster than its molecular counterpart, although the outflow sizes that we derive for them are consistent within the errors (1.34±0.18 kpc and 1.46±0.20 kpc respectively). We use these radii, the broad emission-line luminosities and in the case of the ionized outflow, the density calculated from the trans-auroral [OII] and [SII] lines, to derive mass outflow rates and kinetic coupling efficiencies. Whilst the ionized and warm molecular outflows represent a small fraction of the AGN power (≤0.033% and 0.0001% of Lbol respectively), the total molecular outflow, whose mass is estimated −5 from an assumed warm-to-cold gas mass ratio of 6×10 , has a kinetic coupling efficiency of ∼1.7%Lbol .
    [Show full text]
  • Astronomy Magazine 2015 Index
    Astronomy Magazine 2015 Index SUBJECT A Abell 21 (Medusa) (planetary nebula), 9:73 Abell 65 (planetary nebula), 2:72 Abell 1656 (Coma galaxy cluster), 10:12, 11:74 Abell 2744 (Pandora's Cluster) (galaxy cluster), 2:19 ACT-CL J0102-4915 (El Gordo) (galaxy cluster), 8:9 AL (Astronomical League), 3:82, 84 Aldebaran (star), 1:18 Alexander, Claudia, 11:9 ALH84001 (meteorite), 4:14 ALMA. See Atacama Large Millimeter/submillimeter Array (ALMA) Alpha Aquilae (Altair) (star), 7:14 Alpha Centauri A (star), 5:19 Alpha Cygni (Deneb) (star), 7:14 Alpha Lyrae (Vega) (star), 7:14 Alpha Virginis (Spica) (star), 7:14 Altair (Alpha Aquilae) (star), 7:14 Amalthea (moon of Jupiter), 2:35 Andromeda Galaxy (M31) halo around, 9:19 most detailed image of, 5:13 Antares (star), 6:52–53, 7:14 APF (Automated Planet Finder), 5:46–51, 8:13 Apollo missions location of Snoopy lunar module, 10:50 Moon rocks from, 5:20 Arches Cluster, 9:11 arcseconds, 5:12 Arcturus (star), 7:14 Aries (constellation), observations within, 11:20 Aristarchus Plateau (feature on Moon), 8:20 Arp 299, 5:9 asteroid belt, percentage of mass of contained in Ceres, 8:16 Asteroid Day, 3:19, 7:34–35 asteroids See also names of specific asteroids Asteroid Day, 3:19, 7:34–35 central Australian impact scar, 7:9 largest impacts on Earth, 8:15 mapping using radar, 11:13 mimicking comets, 7:16 with moons, 5:13 NASA asteroid search program problems, 1:12 need to discover and monitor, 6:14, 7:28–33 nomenclature, 7:11 observing with binoculars, 8:58–60 origin of, 5:12 asteroseismology, 2:44–49 astroimaging
    [Show full text]
  • (CARS) No Evidence of Galaxy-Scale Hot Outflows in Two Nearby AGN?
    A&A 618, A27 (2018) Astronomy https://doi.org/10.1051/0004-6361/201833424 & c ESO 2018 Astrophysics The Close AGN Reference Survey (CARS) No evidence of galaxy-scale hot outflows in two nearby AGN? M. C. Powell1, B. Husemann2, G. R. Tremblay3, M. Krumpe4, T. Urrutia4, S. A. Baum5,6, G. Busch7, F. Combes8, S. M. Croom9, T. A. Davis10, A. Eckart7,11, C. P. O’Dea5,12, M. Pérez-Torres13,14, J. Scharwächter15, I. Smirnova-Pinchukova2, and C. M. Urry1 1 Yale Center for Astronomy and Astrophysics, and Physics Department, Yale University, PO Box 2018120, New Haven, CT 06520-8120, USA e-mail: [email protected] 2 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany 3 Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA 4 Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany 5 Department of Physics & Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada 6 Carlson Center for Imaging Science, Rochester Institute of Technology, Rochester, NY 14623, USA 7 I. Physikalisches Institut der Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany 8 LERMA, Observatoire de Paris, Collège de France, PSL Univ., CNRS, Sorbonne Univ., 75014 Paris, France 9 Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, NSW 2006, Australia 10 School of Physics & Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, UK 11 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany 12 School of Physics & Astronomy, Rochester Institute of Technology, Rochester, NY 14623, USA 13 Instituto de Astrofísica de Andalucía, Glorieta de la Astronomía s/n, 18008 Granada, Spain 14 Departamento de Física Teórica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain 15 Gemini Observatory, Northern Operations Center, 670 N.
    [Show full text]
  • A Young and Obscured AGN Embedded in the Giant Radio Galaxy Mrk 1498
    MNRAS 489, 4049–4062 (2019) doi:10.1093/mnras/stz2265 Advance Access publication 2019 August 16 A young and obscured AGN embedded in the giant radio galaxy Mrk 1498 L. Hernandez-Garc´ ´ıa,1‹ F. Panessa,2‹ L. Bassani,3 G. Bruni ,2 F. Ursini,3 V. Chavushyan,4 O. Gonzalez-Mart´ ´ın,5 S. Cazzoli,6 E. F. Jimenez-Andrade´ ,7,8 Downloaded from https://academic.oup.com/mnras/article-abstract/489/3/4049/5550750 by Inst. Astrofisica Andalucia CSIC user on 14 November 2019 P. Arevalo,´ 1 Y. D´ıaz,1 A. Bazzano2 and P. Ubertini2 1Instituto de F´ısica y Astronom´ıa, Facultad de Ciencias, Universidad de Valpara´ıso, Gran Bretana˜ 1111, Playa Ancha, Valpara´ıso, Chile 2INAF - Istituto di Astrofisica e Planetologia Spaziali (IAPS-INAF), Via del Fosso del Cavaliere 100, I-00133 Roma, Italy 3INAF-Osservatorio di astrofisica e scienza dello spazio di Bologna, Via Piero Gobetti 93/3, I-40129 Bologna, Italy 4Instituto Nacional de Astrof´ısica, Optica y Electronica,´ Apartado Postal 51-216, 72000 Puebla, Mexico 5Instituto de Radioastronom´ıa y Astrof´ısica (IRyA-UNAM), 3-72 (Xangari), 8701 Morelia, Mexico 6Instituto de Astrof´ısica de Andaluc´ıa, CSIC, Glorieta de la Astronom´ıa, s/n, E-18008 Granada, Spain 7Argelander Institute for Astronomy, University of Bonn, Auf dem Hugel¨ 71, D-53121 Bonn, Germany 8International Max Planck Research School of Astronomy and Astrophysics at the Universities of Bonn and Cologne, Auf demHgel 69, D-53121 Bonn, Germany Accepted 2019 August 12. Received 2019 August 6; in original form 2019 April 29 ABSTRACT Mrk 1498 is part of a sample of galaxies with extended emission-line regions (extended outwards up to a distance of ∼7 kpc) suggested to be photoionized by an AGN that has faded away or that is still active but heavily absorbed.
    [Show full text]
  • Constelações – Volume 9
    Coleção Os Mensageiros das Estrelas: Constelações – volume 9 Constelações de Junho Organizador Paulo Henrique Colonese Autores Leonardo Pereira de Castro Rafaela Ribeiro da Silva Ilustrador Caio Lopes do Nascimento Baldi Fiocruz-COC 2021 Coleção Os Mensageiros das Estrelas: Constelações – volume 9 Constelações de Junho Organizador Paulo Henrique Colonese Autores Leonardo Pereira de Castro Rafaela Ribeiro da Silva Ilustrador Caio Lopes do Nascimento Baldi Fiocruz-COC 2021 ii Licença de Uso O conteúdo dessa obra, exceto quando indicado outra licença, está disponível sob a Licença Creative Commons, Atribuição-Não Comercial-Compartilha Igual 4.0. FUNDAÇÃO OSWALDO CRUZ Presidente Nísia Trindade Lima Diretor da Casa de Oswaldo Cruz Marcos José de Araújo Pinheiro Chefe do Museu da Vida Héliton da Silva Barros SERVIÇO DE ITINERÂNCIA TECNOLOGIAS CIÊNCIA MÓVEL Stellarium, OBS Studio, VideoScribe, Canva Ana Carolina de Souza Gonzalez Paulo Henrique Colonese (Coordenação) Fernanda Marcelly de Gondra França Flávia Souza Lima REVISÃO CADERNO DE CONTEÚDOS Lais Lacerda Viana Paulo Henrique Colonese Marta Fabíola do Valle G. Mayrink (Coordenação) APOIO ADMINISTRATIVO Paulo Henrique Colonese Fábio Pimentel Rodolfo de Oliveira Zimmer MÍDIAS E DIVULGAÇÃO CONCEPÇÃO E DESENVOLVIMENTO Julianne Gouveia Jackson Almeida de Farias Melissa Raquel Faria Silva Leonardo Pereira de Castro Renata Bohrer Luiz Gustavo Barcellos Inácio (in memoriam) Renata Maria B. Fontanetto Paulo Henrique Colonese (Coordenação) Rita de Cassia da Costa Rafaela Ribeiro da Silva Alcântara(Coordenação) Willian Alves Pereira Willian Vieira de Abreu CAPTAÇÃO DE RECURSOS Escritório de Captação da Fiocruz DESIGN GRÁFICO E ILUSTRAÇÃO Caio Lopes do Nascimento Baldi GESTÃO CULTURAL Sociedade de Promoção da Casa de Oswaldo Cruz Biblioteca de Educação e Divulgação Científica Iloni Seibel C756 Constelações de junho [recurso eletrônico] /Organizador: Paulo Henrique Colonese.
    [Show full text]