X-Ray Studies of Ultraluminous X-Ray Sources
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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 -
Star Formation and Galaxy Evolution of the Local Universe Based on HIPASS
Star formation and galaxy evolution of the Local Universe based on HIPASS Oiwei Ivy Wong Submitted in total fulfilment of the requirements of the Degree of Doctor of Philosophy School of Physics University of Melbourne December, 2007 Abstract This thesis investigates the star formation and galaxy evolution of the nearby Local Volume based on Neutral Hydrogen (HI) studies. A large portion of this thesis con- sists of work with the Northern extension of the HI Parkes All Sky Survey (HIPASS). HIPASS is an HI survey of the entire Southern sky up to a declination of +25.5 de- grees (including the Northern extension) using the Parkes 64-metre radio telescope. I have also produced a catalogue of the optical counterparts corresponding to the galaxies found in Northern HIPASS. From this optical catalogue, we also conclude that we did not find any isolated dark galaxies. The other half of my thesis consists of work with the SINGG and SUNGG projects. SINGG is the Survey for Ioniza- tion in Neutral Gas Galaxies and SUNGG is the Survey of Ultraviolet emission in Neutral Gas Galaxies. Both SINGG and SUNGG are selected from HIPASS and are star formation studies in the H-alpha and ultraviolet (UV), respectively. My work in the SINGG-SUNGG collaboration is mostly based on SUNGG. Using the results of SUNGG, I measured the local luminosity density and the cosmic star formation rate density (SFRD) of the Local Universe. Using far-infrared (FIR) observations from IRAS, the FIR luminosity density was also calculated. Combining the FUV luminosity density and the FIR luminosity density, the bolometric SFRD of the Lo- cal Universe was estimated. -
RADIO ASTRONOMY OBERVTORY Quarterly Report CHARLOTTESVILLE, VA
1 ; NATIONAL RADIO ASTRONOMY OBSERVATORY Charlottesville, Virginia t PROPERTY OF TH E U.S. G - iM RADIO ASTRONOMY OBERVTORY Quarterly Report CHARLOTTESVILLE, VA. 4 OCT 2 2em , July 1, 1984 - September 30, 1984 .. _._r_.__. _.. RESEARCH PROGRAMS 140-ft Telescope Hours Scheduled observing 1853.75 Scheduled maintenance and equipment changes 205.00 Scheduled tests and calibration 145.25 Time lost due to: equipment failure 122.00 power 3.25 weather 0.25 interference 14.50 The following continuum program was conducted during this quarter. No. Observer Program W193 N. White (European Space Observations at 6 cm of the eclipsing Agency) RS CVn system AR Lac. J. Culhane (Cambridge) J. Kuijpers (Utrecht) K. Mason (Cambridge) A. Smith (European Space Agency) The following line programs were conducted during this quarter. No. Observer Program B406 M. Bell (Herzberg) Observations at 13.9 GHz in search of H. Matthews (Herzberg) C6 H in TMC1. T. Sears (Brookhaven) B422 M. Bell (Herzberg) Observations at 3 cm to search for H. Matthews (Herzberg) C5 H in TMC1 and examination of T. Sears (Brookhaven) spectral features in IRC+10216 thought to be due to HC 9 N or C5 H. B423 M. Bell (Herzberg) Observations at 9895 MHz in an attempt H. Matthews (Herzberg) to detect C3 N in absorption against Cas A. 2 No. Observer Program B424 W. Batria Observations at 9.1 GHz of a newly discovered comet. C216 F. Clark (Kentucky) Observations at 6 cm and 18 cm of OH S. Miller (Kentucky) and H20 to study stellar winds and cloud dynamics. -
The Type II-Plateau Supernova 2017Eaw in NGC 6946 and Its Red Supergiant Progenitor
The Astrophysical Journal, 875:136 (23pp), 2019 April 20 https://doi.org/10.3847/1538-4357/ab1136 © 2019. The American Astronomical Society. All rights reserved. The Type II-plateau Supernova 2017eaw in NGC 6946 and Its Red Supergiant Progenitor Schuyler D. Van Dyk1 , WeiKang Zheng2 , Justyn R. Maund3 , Thomas G. Brink2, Sundar Srinivasan4,5, Jennifer E. Andrews6, Nathan Smith6, Douglas C. Leonard7, Viktoriya Morozova8 , Alexei V. Filippenko2,9 , Brody Conner10, Dan Milisavljevic10 , Thomas de Jaeger2, Knox S. Long11,12 , Howard Isaacson2 , Ian J. M. Crossfield13, Molly R. Kosiarek14,21 , Andrew W. Howard15 , Ori D. Fox11 , Patrick L. Kelly16 , Anthony L. Piro17 , Stuart P. Littlefair3 , Vik S. Dhillon3,18, Richard Wilson19, Timothy Butterley19, Sameen Yunus2, Sanyum Channa2, Benjamin T. Jeffers2, Edward Falcon2, Timothy W. Ross2, Julia C. Hestenes2, Samantha M. Stegman2, Keto Zhang2, and Sahana Kumar2,20 1 Caltech/Spitzer Science Center, Caltech/IPAC, Mailcode 100-22, Pasadena, CA 91125, USA 2 Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA 3 Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK 4 Institute of Astronomy & Astrophysics, Academia Sinica, 11F, Astronomy-Mathematics Building, No. 1, Roosevelt Rd, Sec 4, Taipei 10617, Taiwan, Republic of China 5 Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autonóma de México, Antigua Carretera a Pátzcuaro # 8701 Ex-Hda., San José de la Huerta, Morelia, Michoacán, C.P. 58089, Mexico -
Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946 William P
CORE Metadata, citation and similar papers at core.ac.uk Provided by Dartmouth Digital Commons (Dartmouth College) Dartmouth College Dartmouth Digital Commons Open Dartmouth: Faculty Open Access Articles 3-2001 Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946 William P. Blair Johns Hopkins University Robert A. Fesen Dartmouth College Eric M. Schlegel Harvard-Smithsonian Center for Astrophysics Follow this and additional works at: https://digitalcommons.dartmouth.edu/facoa Part of the Stars, Interstellar Medium and the Galaxy Commons Recommended Citation Blair, William P.; Fesen, Robert A.; and Schlegel, Eric M., "Hubble Space Telescope Images of the Ultraluminous Supernova Remnant Complex in NGC 6946" (2001). Open Dartmouth: Faculty Open Access Articles. 2227. https://digitalcommons.dartmouth.edu/facoa/2227 This Article is brought to you for free and open access by Dartmouth Digital Commons. It has been accepted for inclusion in Open Dartmouth: Faculty Open Access Articles by an authorized administrator of Dartmouth Digital Commons. For more information, please contact [email protected]. THE ASTRONOMICAL JOURNAL, 121:1497È1506, 2001 March ( 2001. The American Astronomical Society. All rights reserved. Printed in U.S.A. HUBBL E SPACE T EL ESCOPE IMAGES OF THE ULTRALUMINOUS SUPERNOVA REMNANT COMPLEX IN NGC 69461 WILLIAM P. BLAIR Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686; wpb=pha.jhu.edu ROBERT A. FESEN -
Comprehensive Broadband X-Ray and Multiwavelength Study of Active Galactic Nuclei in Local 57 Ultra/Luminous Infrared Galaxies Observed with Nustar And/Or Swift/BAT
Draft version July 26, 2021 Typeset using LATEX twocolumn style in AASTeX631 Comprehensive Broadband X-ray and Multiwavelength Study of Active Galactic Nuclei in Local 57 Ultra/luminous Infrared Galaxies Observed with NuSTAR and/or Swift/BAT Satoshi Yamada ,1 Yoshihiro Ueda ,1 Atsushi Tanimoto ,2 Masatoshi Imanishi ,3, 4 Yoshiki Toba ,1, 5 Claudio Ricci ,6, 7, 8 and George C. Privon 9 1Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan 2Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan 3National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo 181-8588, Japan 4Department of Astronomical Science, Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 5Research Center for Space and Cosmic Evolution, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan 6N´ucleo de Astronom´ıade la Facultad de Ingenier´ıa,Universidad Diego Portales, Av. Ej´ercito Libertador 441, Santiago, Chile 7Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China 8George Mason University, Department of Physics & Astronomy, MS 3F3, 4400 University Drive, Fairfax, VA 22030, USA 9National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA (Received April 13, 2021; Revised June 11, 2021; Accepted Jul, 2021) ABSTRACT We perform a systematic X-ray spectroscopic analysis of 57 local ultra/luminous infrared galaxy systems (containing 84 individual galaxies) observed with Nuclear Spectroscopic Telescope Array and/or Swift/BAT. Combining soft X-ray data obtained with Chandra, XMM-Newton, Suzaku and/or Swift/XRT, we identify 40 hard (>10 keV) X-ray detected active galactic nuclei (AGNs) and con- strain their torus parameters with the X-ray clumpy torus model XCLUMPY (Tanimoto et al. -
Far-Infrared Observations of a Massive Cluster Forming in the Monoceros R2 filament Hub? T
Astronomy & Astrophysics manuscript no. monr2_hobys˙final˙corrected c ESO 2017 December 5, 2017 Far-infrared observations of a massive cluster forming in the Monoceros R2 filament hub? T. S. M. Rayner1??, M. J. Griffin1, N. Schneider2; 3, F. Motte4; 5, V. K¨onyves5, P. Andr´e5, J. Di Francesco6, P. Didelon5, K. Pattle7, D. Ward-Thompson7, L. D. Anderson8, M. Benedettini9, J.-P. Bernard10, S. Bontemps3, D. Elia9, A. Fuente11, M. Hennemann5, T. Hill5; 12, J. Kirk7, K. Marsh1, A. Men'shchikov5, Q. Nguyen Luong13; 14, N. Peretto1, S. Pezzuto9, A. Rivera-Ingraham15, A. Roy5, K. Rygl16, A.´ S´anchez-Monge2, L. Spinoglio9, J. Tig´e17, S. P. Trevi~no-Morales18, and G. J. White19; 20 1 Cardiff School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff, Wales, CF24 3AA, UK 2 I. Physik. Institut, University of Cologne, 50937 Cologne, Germany 3 Laboratoire d'Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, B18N, all´eeG. Saint-Hilaire, 33615 Pessac, France 4 Universit´eGrenoble Alpes, CNRS, Institut de Planetologie et d'Astrophysique de Grenoble, 38000 Grenoble, France 5 Laboratoire AIM, CEA/IRFU { CNRS/INSU { Universit´eParis Diderot, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France 6 NRC, Herzberg Institute of Astrophysics, Victoria, Canada 7 Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK 8 Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA 9 INAF { Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Roma, Italy 10 -
Data Delivery Document
The CygnusX Legacy Project Data Description: Delivery 1: July 2011 CygnusX team: Joseph L. Hora1 (PI), Sylvain Bontemps2, Tom Megeath3, Nicola Schneider4 , Frederique Motte4, Sean Carey5, Robert Simon6, Eric Keto1, Howard Smith1, Lori Allen7, Rob Gutermuth8, Giovanni Fazio1, Kathleen Kraemer9, Don Mizuno10, Stephan Price9, Joseph Adams11, Xavier Koenig12 1Harvard-Smithsonian Center for Astrophysics, 2Observatoire de Bordeaux, 3University of Toledo, 4CEA-Saclay, 5Spitzer Science Center, 6Universität zu Köln, 7NOAO, 8Smith College, 9Air Force Research Lab, 10Boston College, 11Cornell University, 12Goddard Space Flight Center Table of Contents 1. Project Summary ..................................................................................................................... 3 1.1 IRAC observations ........................................................................................................... 3 1.2 MIPS observations ........................................................................................................... 4 1.3 Data reduction .................................................................................................................. 5 1.3.1 IRAC reduction ......................................................................................................... 5 1.3.2 MIPS reduction ......................................................................................................... 7 2. Point Source Catalog.............................................................................................................. -
Discovery of a Wolf–Rayet Star Through Detection of Its Photometric Variability
The Astronomical Journal, 143:136 (6pp), 2012 June doi:10.1088/0004-6256/143/6/136 C 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A. DISCOVERY OF A WOLF–RAYET STAR THROUGH DETECTION OF ITS PHOTOMETRIC VARIABILITY Colin Littlefield1, Peter Garnavich2, G. H. “Howie” Marion3,Jozsef´ Vinko´ 4,5, Colin McClelland2, Terrence Rettig2, and J. Craig Wheeler5 1 Law School, University of Notre Dame, Notre Dame, IN 46556, USA 2 Physics Department, University of Notre Dame, Notre Dame, IN 46556, USA 3 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA 4 Department of Optics, University of Szeged, Hungary 5 Astronomy Department, University of Texas, Austin, TX 78712, USA Received 2011 November 9; accepted 2012 April 4; published 2012 May 2 ABSTRACT We report the serendipitous discovery of a heavily reddened Wolf–Rayet star that we name WR 142b. While photometrically monitoring a cataclysmic variable, we detected weak variability in a nearby field star. Low- resolution spectroscopy revealed a strong emission line at 7100 Å, suggesting an unusual object and prompting further study. A spectrum taken with the Hobby–Eberly Telescope confirms strong He ii emission and an N iv 7112 Å line consistent with a nitrogen-rich Wolf–Rayet star of spectral class WN6. Analysis of the He ii line strengths reveals no detectable hydrogen in WR 142b. A blue-sensitive spectrum obtained with the Large Binocular Telescope shows no evidence for a hot companion star. The continuum shape and emission line ratios imply a reddening of E(B − V ) = 2.2–2.6 mag. -
Cygnus X-3 and the Case for Simultaneous Multifrequency
by France Anne-Dominic Cordova lthough the visible radiation of Cygnus A X-3 is absorbed in a dusty spiral arm of our gal- axy, its radiation in other spectral regions is observed to be extraordinary. In a recent effort to better understand the causes of that radiation, a group of astrophysicists, including the author, carried 39 Cygnus X-3 out an unprecedented experiment. For two days in October 1985 they directed toward the source a variety of instru- ments, located in the United States, Europe, and space, hoping to observe, for the first time simultaneously, its emissions 9 18 Gamma Rays at frequencies ranging from 10 to 10 Radiation hertz. The battery of detectors included a very-long-baseline interferometer consist- ing of six radio telescopes scattered across the United States and Europe; the Na- tional Radio Astronomy Observatory’s Very Large Array in New Mexico; Caltech’s millimeter-wavelength inter- ferometer at the Owens Valley Radio Ob- servatory in California; NASA’s 3-meter infrared telescope on Mauna Kea in Ha- waii; and the x-ray monitor aboard the European Space Agency’s EXOSAT, a sat- ellite in a highly elliptical, nearly polar orbit, whose apogee is halfway between the earth and the moon. In addition, gamma- Wavelength (m) ray detectors on Mount Hopkins in Ari- zona, on the rim of Haleakala Crater in Fig. 1. The energy flux at the earth due to electromagnetic radiation from Cygnus X-3 as a Hawaii, and near Leeds, England, covered function of the frequency and, equivalently, energy and wavelength of the radiation. -
Globules and Pillars in Cygnus X II
A&A 599, A37 (2017) Astronomy DOI: 10.1051/0004-6361/201628962 & c ESO 2017 Astrophysics Globules and pillars in Cygnus X II. Massive star formation in the globule IRAS 20319+3958?,?? A. A. Djupvik1, F. Comerón2, and N. Schneider3 1 Nordic Optical Telescope, Rambla José Ana Fernández Pérez 7, 38711 Breña Baja, Spain e-mail: [email protected] 2 European Southern Observatory, 3107 Alonso de Córdova, Vitacura, Santiago, Chile 3 KOSMA, I. Physik. Institut, Zülpicher Str. 77, Universität Köln, 50937 Köln, Germany Received 17 May 2016 / Accepted 9 November 2016 ABSTRACT Globules and pillars, impressively revealed by the Spitzer and Herschel satellites, for example, are pervasive features found in regions of massive star formation. Studying their embedded stellar populations can provide an excellent laboratory to test theories of triggered star formation and the features that it may imprint on the stellar aggregates resulting from it. We studied the globule IRAS 20319+3958 in Cygnus X by means of visible and near-infrared imaging and spectroscopy, complemented with mid-infrared Spitzer/IRAC imaging, in order to obtain a census of its stellar content and the nature of its embedded sources. Our observations show that the globule contains an embedded aggregate of about 30 very young (.1 Myr) stellar objects, for which we estimate a total mass of ∼90 M . The most massive members are three systems containing early B-type stars. Two of them most likely produced very compact H II regions, one of them being still highly embedded and coinciding with a peak seen in emission lines characterising the photon dominated region (PDR). -
ISOCAM Observations of Normal Star-Forming Galaxies: the Key Project Sample’
ISOCAM Observations of Normal Star-Forming Galaxies: The Key Project Sample’ D.A. Dale,2 N.A. Silbermann,2 G. Heloq2 E. Valjaveq2 S. Malhotra,2 C.A. Beichman,2 J. Brauher,2 A. Contursi,2H. Diner~tein,~D. H~llenbach,~D. Hunter,s S. Kolhatkar,2 K.Y. LO,^ S. Lord,2 N.Y. Lu,~R. Rubiq4 G. Stacey,? H. Thronson, Jr.,’ M. Werner,g H. Corwin2 ABSTRACT We present mid-infrared maps and preliminary analysis for 61 galaxies observed with the Infrared Space Observatory. Many of the general features of galaxies observed at optical wavelengths-spiral arms, disks, rings, and bright knots of emission-are also seen in the mid-infrared, except the prominent optical bulges are absent at 6.75 and 15 pm. In addition, the maps are quite similar at 6.75 and 15 pm, except for a few cases where a central starburst leads to lower !dS3~4ratios in the inner region. kVe also present infrared flux densities and mid-infrared sizes for these galasies. The mid-infrared color Iu(6.Zpm) Iu(l.5pm) shows a distincttrend with the far-infrared color m.The quiescent galasies in our sample 1, (60~)g 0.6) show unity,near ( I,( 1OOpm) whereas this ratio drops significantly for galaxies with higher global heating intensity levels. Azimuthally-averaged surface brightness profiles indicate the extent to which the mid-infrared flux is centrally concerltratecl, a,rltl provide information on the radial dependence of mid-infrared colors. The galaxies are mostly well resolved in these maps: almost half of them have < 10% of their flux in the central resolution element.