Early Science from the LWA Phase II: a Target List
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Spectroscopy of the Candidate Luminous Blue Variable at the Center
A&A manuscript no. ASTRONOMY (will be inserted by hand later) AND Your thesaurus codes are: 06 (08.03.4; 08.05.1; 08.05.3; 08.09.2; 08.13.2; 08.22.3) ASTROPHYSICS Spectroscopy of the candidate luminous blue variable at the center of the ring nebula G79.29+0.46 R.H.M. Voors1,2⋆, T.R. Geballe3, L.B.F.M. Waters4,5, F. Najarro6, and H.J.G.L.M. Lamers1,2 1 Astronomical Institute, University of Utrecht, Princetonplein 5, 3508 TA Utrecht, The Netherlands 2 SRON Laboratory for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, The Netherlands 3 Gemini Observatory, 670 N. A’ohoku Place, Hilo, Hawaii 96720, USA 4 Astronomical Institute ’Anton Pannekoek’, University of Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, The Nether- lands 5 SRON Laboratory for Space Research, P.O. Box 800, NL-9700 AV Groningen, The Netherlands 6 CSIC Instituto de Estructura de la Materia, Dpto. Fisica Molecular, C/Serrano 121, E-28006 Madrid, Spain Received date: 23 March 2000; accepted date Abstract. We report optical and near-infrared spectra of Luminous Blue Variable (LBV) stage (Conti 1984), these the central star of the radio source G79.29+0.46, a can- stars lose a large amount of mass in a short time interval didate luminous blue variable. The spectra contain nu- (e.g. Chiosi & Maeder 1986). The identifying characteris- merous narrow (FWHM < 100 kms−1) emission lines of tics of an LBV in addition to its blue colors are (1) a mass −5 −1 which the low-lying hydrogen lines are the strongest, and loss rate of (∼ 10 M⊙ yr ), (2) a low wind velocity of resemble spectra of other LBVc’s and B[e] supergiants. -
BRAS Newsletter August 2013
www.brastro.org August 2013 Next meeting Aug 12th 7:00PM at the HRPO Dark Site Observing Dates: Primary on Aug. 3rd, Secondary on Aug. 10th Photo credit: Saturn taken on 20” OGS + Orion Starshoot - Ben Toman 1 What's in this issue: PRESIDENT'S MESSAGE....................................................................................................................3 NOTES FROM THE VICE PRESIDENT ............................................................................................4 MESSAGE FROM THE HRPO …....................................................................................................5 MONTHLY OBSERVING NOTES ....................................................................................................6 OUTREACH CHAIRPERSON’S NOTES .........................................................................................13 MEMBERSHIP APPLICATION .......................................................................................................14 2 PRESIDENT'S MESSAGE Hi Everyone, I hope you’ve been having a great Summer so far and had luck beating the heat as much as possible. The weather sure hasn’t been cooperative for observing, though! First I have a pretty cool announcement. Thanks to the efforts of club member Walt Cooney, there are 5 newly named asteroids in the sky. (53256) Sinitiere - Named for former BRAS Treasurer Bob Sinitiere (74439) Brenden - Named for founding member Craig Brenden (85878) Guzik - Named for LSU professor T. Greg Guzik (101722) Pursell - Named for founding member Wally Pursell -
Miniature Exoplanet Radial Velocity Array I: Design, Commissioning, and Early Photometric Results
Miniature Exoplanet Radial Velocity Array I: design, commissioning, and early photometric results Jonathan J. Swift Steven R. Gibson Michael Bottom Brian Lin John A. Johnson Ming Zhao Jason T. Wright Paul Gardner Nate McCrady Emilio Falco Robert A. Wittenmyer Stephen Criswell Peter Plavchan Chantanelle Nava Reed Riddle Connor Robinson Philip S. Muirhead David H. Sliski Erich Herzig Richard Hedrick Justin Myles Kevin Ivarsen Cullen H. Blake Annie Hjelstrom Jason Eastman Jon de Vera Thomas G. Beatty Andrew Szentgyorgyi Stuart I. Barnes Downloaded From: http://astronomicaltelescopes.spiedigitallibrary.org/ on 05/21/2017 Terms of Use: http://spiedigitallibrary.org/ss/termsofuse.aspx Journal of Astronomical Telescopes, Instruments, and Systems 1(2), 027002 (Apr–Jun 2015) Miniature Exoplanet Radial Velocity Array I: design, commissioning, and early photometric results Jonathan J. Swift,a,*,† Michael Bottom,a John A. Johnson,b Jason T. Wright,c Nate McCrady,d Robert A. Wittenmyer,e Peter Plavchan,f Reed Riddle,a Philip S. Muirhead,g Erich Herzig,a Justin Myles,h Cullen H. Blake,i Jason Eastman,b Thomas G. Beatty,c Stuart I. Barnes,j,‡ Steven R. Gibson,k,§ Brian Lin,a Ming Zhao,c Paul Gardner,a Emilio Falco,l Stephen Criswell,l Chantanelle Nava,d Connor Robinson,d David H. Sliski,i Richard Hedrick,m Kevin Ivarsen,m Annie Hjelstrom,n Jon de Vera,n and Andrew Szentgyorgyil aCalifornia Institute of Technology, Departments of Astronomy and Planetary Science, 1200 E. California Boulevard, Pasadena, California 91125, United States bHarvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, United States cThe Pennsylvania State University, Department of Astronomy and Astrophysics, Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, University Park, Pennsylvania 16802, United States dUniversity of Montana, Department of Physics and Astronomy, 32 Campus Drive, No. -
I. Is There an Accretion Mode Dichotomy in Radio-Loud AGN?
MNRAS 440, 269–297 (2014) doi:10.1093/mnras/stu263 Advance Access publication 2014 March 10 An X-ray survey of the 2 Jy sample – I. Is there an accretion mode dichotomy in radio-loud AGN? B. Mingo,1,2‹ M. J. Hardcastle,1 J. H. Croston,3 D. Dicken,4 D. A. Evans,5 R. Morganti6,7 and C. Tadhunter8 1School of Physics, Astronomy & Mathematics, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK 2Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK 3School of Physics and Astronomy, University of Southampton, Southampton SO17 1SJ, UK 4Institut d’Astrophysique Spatiale, Universite´ Paris Sud, F-91405 Orsay, France 5Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA 6ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands 7Kapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands 8Department of Physics and Astronomy, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UK Accepted 2014 February 6. Received 2014 February 6; in original form 2013 May 31 ABSTRACT We carry out a systematic study of the X-ray emission from the active nuclei of the 0.02 <z< 0.7 2 Jy sample, using Chandra and XMM–Newton observations. We combine our results with those from mid-infrared, optical emission-line and radio observations, and add them to those of the 3CRR sources. We show that the low-excitation objects in our samples show signs of radiatively inefficient accretion. We study the effect of the jet-related emission on the various luminosities, confirming that it is the main source of soft X-ray emission for our sources. -
NI\S/\ \\\\\\\\\ \\\\ \\\\ \\\\\ \\\\\ \\\\\ \\\\\ \\\\ \\\\ ' NF00991 ) NASA Technical Memorandum 86169
NASA-TM-8616919850010600 NASA Technical Memorandum 86169'----------/ X-Ray Spectra of Supernova Remnants Andrew E. Szymkowiak FEBRUARY 1985 LIBRARY COpy ;:. t- q', IJ~/) LANGLEY RESEARCY CENTER LIBRARY, NASA HAMPTON, VIRGINIA NI\S/\ \\\\\\\\\ \\\\ \\\\ \\\\\ \\\\\ \\\\\ \\\\\ \\\\ \\\\ ' NF00991 ) NASA Technical Memorandum 86169 X-Ray Spectra of Supernova Remnants Andrew E. Szymkowiak University of Maryland College Park, Maryland NI\S/\ National Aeronautics and Space Administration Scientific and Technical Information Branch 1985 This Page Intentionally Left Blank iii TABLE OF CONTENTS Table of r,ontents............................................... iii I. Introductlon................................................. 1 II. Observational and Theoretical Background.................... 4 III. Theory for the X-ray Emission.............................. 14 IV. Experiment and Analysis Description......................... 33 V. Variations in X-ray Spectra Across Puppis A.................. 46 VI. X-ray Spectra of Two Young Remnants......................... 70 VII. Future Prospects........................................... 93 VIII. Recapitulation............................................ 99 Bibliography.................................................... 102 1 I. Introduct10n The advent of astronom1cal spectroscopy prov1ded much of the impetus for the creation of astrophysics, a bridge between phYS1CS and astronomy. The ability to study composition and temperature of remote objects allowed the transition from a field mainly concerned with -
RESEARCH PROGRAMS 140-Foot Telescope
VS/G LI NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia r Quarterly Report October 1, 1981 - December 31, 1981 RESEARCH PROGRAMS 140-foot Telescope Hours Scheduled observing 1955.75 Scheduled maintenance and equipment changes 179.25 Scheduled tests and calibration 1.00 Time lost due to: equipment failure 34.75 power 9.50 weather 133.25 interference 0.00 The following line programs were conducted during this quarter. No. Observer (s) Program T-156 I. Kazes (Meudon, France) Observations to study giant molecular B. Turner clouds at the main 18 cm OH line frequencies. T-145 B. Turner Search within the 13-16 GHz range for new molecular species. S-233 L. Buxton (Illinois) Observations at 20.9 and 24.4 GHz to E. Campbell (Illinois) search for the HCN dimer (HCN) 2 . W. Flygare (Illinois) P. Jewell (Illinois) M. Schenewerk (Illinois) L. Snyder (Illinois) B-381 R. Brown Observations at 5-cm to confirm and extend the detection of recombination line emission from 3C 245 and a search for this type of emission from other QSOs. S-246 M. Bell (NRC, Canada) Search at 5 cm for recombination lines E. Seaquist (Toronto) in compact extragalactic sources. No. Observer(s) Program M-176 L. Avery (NRC, Canada) Observations at 18.2 GHz of the J=241 N. Broten (NRC, Canada) transition of HC3N, generally toward J. MacLeod (NRC, Canada) dark clouds. H. Matthews (NRC, Canada T. Oka (Chicago) The following continuum programs were conducted during this quarter. No. Observer (s) Program C-194 M. Condon (unaffiliated) Survey at 14.5 cm of extragalactic J. -
Also Available in PDF
University of Hawai‘i, Institute for Astronomy Publications in Calendar Year 2000 PUBLICATIONS Investigating the Link between Cometary and Interstellar Material. A&A, 353, 1101–1114 (2000) The following articles and books were published dur- ing calendar year 2000. The names of IfA authors Boehnhardt, H.; Hainaut, O.; Delahodde, C.; West, R.; are in boldface. For an html version of this list Meech, K.; Marsden, B. A Pencil-Beam Search for Dis- with links, go to http://www.ifa.hawaii.edu/publications/ tant TNOs at the ESO NTT. In Minor Bodies in the Outer 2000pubs.html. More recent publications are listed at Solar System, ed. A. Fitzsimmons, D. Jewitt, & R. M. http://www.ifa.hawaii.edu/publications/preprints/. West. ESO Astrophysics Symposia (Springer), 117–123 (2000) Barger, A. J.; Cowie, L. L.; Richards, E. A. Mapping the Evolution of High-Redshift Dusty Galaxies with Submil- Boesgaard, A. M. Review of Stellar Abundance Results from limeter Observations of a Radio-selected Sample. AJ, Large Telescopes. Proc. SPIE, 4005, 142–149 (2000) 119, 2092–2109 (2000) Boesgaard, A. M.; Stephens, A.; King, J. R.; Deliyannis, Barucci, M. A.; Romon, J.; Doressoundiram, A.; Tholen, C. P. Chemical Abundances in Globular Cluster Turn-Off D. J. Compositional Surface Diversity in the Trans-Nep- Stars from Keck/HIRES Observations. Proc. SPIE, 4005, tunian Objects. AJ, 120, 496–500 (2000) 274–284 (2000) Baudoz, P.; Mouillet, D.; Beuzit, J.-L.; Mekarnia, D.; Rab- Brandner, W.; Grebel, E. K.; Chu, Y.; Dottori, H.; Brandl, bia, Y.; Gay, J.; Schneider, J.-L. First Results of the B.; Richling, S.; Yorke, H. -
Simulating Electron Transport and Synchrotron Emission in Radio Galaxies: Shock Acceleration and Synchrotron Aging in Three-Dimensional Flows
CORE Metadata, citation and similar papers at core.ac.uk Provided by CERN Document Server Simulating Electron Transport and Synchrotron Emission in Radio Galaxies: Shock Acceleration and Synchrotron Aging in Three-Dimensional Flows I. L. Tregillis 1,T.W.Jones1, Dongsu Ryu 2 ABSTRACT We present the first three-dimensional MHD radio galaxy simulations that explicitly model transport of relativistic electrons, including diffusive acceleration at shocks as well as radiative and adiabatic cooling in smooth flows. We discuss here three simulations of light Mach 8 jets, designed to explore the effects of shock acceleration and radiative aging on the nonthermal particle populations that give rise to synchrotron and inverse-Compton radiations. Because our goal is to explore the connection between the large-scale flow dynamics and the small-scale physics underlying the observed emissions from real radio galaxies, we combine the magnetic field and relativistic electron momentum distribution information to compute an approximate but self-consistent synchrotron emissivity and produce detailed synthetic radio telescope observations. We have gained several key insights from this approach: 1. The jet head in these multidimensional simulations is an extremely complex environment. The classical jet termination shock is often absent, but motions of the jet terminus spin a “shock-web complex” within the backflowing jet material of the head. 2. Correct interpretation of the spectral distribution of energetic electrons in these simulations relies partly upon understanding the shock-web complex, for it can give rise to distributions that confound interpretation in terms of the standard model for radiative aging of radio galaxies. 3. The magnetic field outside of the jet itself becomes very intermittent and filamentary in these simulations, yet adiabatic expansion causes most of the cocoon volume to be occupied by field strengths considerably diminished below the nominal jet value. -
The Applicability of Far-Infrared Fine-Structure Lines As Star Formation
A&A 568, A62 (2014) Astronomy DOI: 10.1051/0004-6361/201322489 & c ESO 2014 Astrophysics The applicability of far-infrared fine-structure lines as star formation rate tracers over wide ranges of metallicities and galaxy types? Ilse De Looze1, Diane Cormier2, Vianney Lebouteiller3, Suzanne Madden3, Maarten Baes1, George J. Bendo4, Médéric Boquien5, Alessandro Boselli6, David L. Clements7, Luca Cortese8;9, Asantha Cooray10;11, Maud Galametz8, Frédéric Galliano3, Javier Graciá-Carpio12, Kate Isaak13, Oskar Ł. Karczewski14, Tara J. Parkin15, Eric W. Pellegrini16, Aurélie Rémy-Ruyer3, Luigi Spinoglio17, Matthew W. L. Smith18, and Eckhard Sturm12 1 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium e-mail: [email protected] 2 Zentrum für Astronomie der Universität Heidelberg, Institut für Theoretische Astrophysik, Albert-Ueberle Str. 2, 69120 Heidelberg, Germany 3 Laboratoire AIM, CEA, Université Paris VII, IRFU/Service d0Astrophysique, Bat. 709, 91191 Gif-sur-Yvette, France 4 UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK 5 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK 6 Laboratoire d0Astrophysique de Marseille − LAM, Université Aix-Marseille & CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille CEDEX 13, France 7 Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, UK 8 European Southern Observatory, Karl -
The Jets in Radio Galaxies
The jets in radio galaxies Martin John Hardcastle Churchill College September 1996 A dissertation submitted in candidature for the degree of Doctor of Philosophy in the University of Cambridge i `Glaucon: ª...But how did you mean the study of astronomy to be reformed, so as to serve our pur- poses?º Socrates: ªIn this way. These intricate traceries on the sky are, no doubt, the loveliest and most perfect of material things, but still part of the visibleworld, and therefore they fall far short of the true realities Ð the real relativevelocities,in theworld of purenumber and all geometrical ®gures, of the movements which carry round the bodies involved in them. These, you will agree, can be conceived by reason and thought, not by the eye.º Glaucon: ªExactly.º Socrates: ªAccordingly, we must use the embroidered heaven as a model to illustrateour study of these realities, just as one might use diagrams exquisitely drawn by some consummate artist like Daedalus. An expert in geometry, meeting with such designs, would admire their ®nished workmanship, but he wouldthink it absurd to studythem in all earnest with the expectation of ®nding in their proportionsthe exact ratio of any one number to another...º ' Ð Plato (429±347 BC), The Republic, trans. F.M. Cornford. ii Contents 1 Introduction 1 1.1 Thisthesis...................................... ... 1 1.2 Abriefhistory................................... .... 2 1.3 Synchrotronphysics........ ........... ........... ...... 4 1.4 Currentobservationalknowledgeintheradio . ............. 5 1.4.1 Jets ........................................ 6 1.4.2 Coresornuclei ................................. 6 1.4.3 Hotspots ..................................... 7 1.4.4 Largescalestructure . .... 7 1.4.5 Theradiosourcemenagerie . .... 8 1.4.6 Observationaltrends . -
Jet-Powered Molecular Hydrogen Emission from Radio Galaxies
JET-POWERED MOLECULAR HYDROGEN EMISSION FROM RADIO GALAXIES The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Ogle, Patrick, Francois Boulanger, Pierre Guillard, Daniel A. Evans, Robert Antonucci, P. N. Appleton, Nicole Nesvadba, and Christian Leipski. “JET-POWERED MOLECULAR HYDROGEN EMISSION FROM RADIO GALAXIES.” The Astrophysical Journal 724, no. 2 (November 11, 2010): 1193–1217. © 2010 The American Astronomical Society As Published http://dx.doi.org/10.1088/0004-637x/724/2/1193 Publisher IOP Publishing Version Final published version Citable link http://hdl.handle.net/1721.1/95698 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The Astrophysical Journal, 724:1193–1217, 2010 December 1 doi:10.1088/0004-637X/724/2/1193 C 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A. JET-POWERED MOLECULAR HYDROGEN EMISSION FROM RADIO GALAXIES Patrick Ogle1, Francois Boulanger2, Pierre Guillard1, Daniel A. Evans3, Robert Antonucci4, P. N. Appleton5, Nicole Nesvadba2, and Christian Leipski6 1 Spitzer Science Center, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125, USA; [email protected] 2 Institut d’Astrophysique Spatiale, Universite Paris-Sud 11, Bat. 121, 91405 Orsay Cedex, France 3 MIT Center for Space Research, Cambridge, MA 02139, USA 4 Physics Department, University of California, Santa Barbara, CA 93106, USA 5 NASA Herschel Science Center, California Institute of Technology, Mail Code 100-22, Pasadena, CA 91125, USA 6 Max-Planck Institut fur¨ Astronomie (MPIA), Konigstuhl¨ 17, D-69117 Heidelberg, Germany Received 2009 November 10; accepted 2010 September 22; published 2010 November 11 ABSTRACT H2 pure-rotational emission lines are detected from warm (100–1500 K) molecular gas in 17/55 (31% of) radio galaxies at redshift z<0.22 observed with the Spitzer IR Spectrograph. -
Meeting Abstracts
228th AAS San Diego, CA – June, 2016 Meeting Abstracts Session Table of Contents 100 – Welcome Address by AAS President Photoionized Plasmas, Tim Kallman (NASA 301 – The Polarization of the Cosmic Meg Urry GSFC) Microwave Background: Current Status and 101 – Kavli Foundation Lecture: Observation 201 – Extrasolar Planets: Atmospheres Future Prospects of Gravitational Waves, Gabriela Gonzalez 202 – Evolution of Galaxies 302 – Bridging Laboratory & Astrophysics: (LIGO) 203 – Bridging Laboratory & Astrophysics: Atomic Physics in X-rays 102 – The NASA K2 Mission Molecules in the mm II 303 – The Limits of Scientific Cosmology: 103 – Galaxies Big and Small 204 – The Limits of Scientific Cosmology: Town Hall 104 – Bridging Laboratory & Astrophysics: Setting the Stage 304 – Star Formation in a Range of Dust & Ices in the mm and X-rays 205 – Small Telescope Research Environments 105 – College Astronomy Education: Communities of Practice: Research Areas 305 – Plenary Talk: From the First Stars and Research, Resources, and Getting Involved Suitable for Small Telescopes Galaxies to the Epoch of Reionization: 20 106 – Small Telescope Research 206 – Plenary Talk: APOGEE: The New View Years of Computational Progress, Michael Communities of Practice: Pro-Am of the Milky Way -- Large Scale Galactic Norman (UC San Diego) Communities of Practice Structure, Jo Bovy (University of Toronto) 308 – Star Formation, Associations, and 107 – Plenary Talk: From Space Archeology 208 – Classification and Properties of Young Stellar Objects in the Milky Way to Serving