Table of Contents May AAC General Meeting No Summer AAC Meetings
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Swarthmore Inaugurates Eleventh President
S w a r t h m o r e COLLEGE BULLETIN, ALUM NI ISSUE JAN U ARY, 1974 Theodore Woo< Swarthmore Inaugurates Eleventh President On a brilliant October day, as the tulip poplars shed their leaves around the assembled guests in the Scott Outdoor Auditorium, Theodore Wood Friend III was inaugurated the eleventh president of Swarthmore College. The simple ceremony presided over by Stephen G. Lax ’41, chairman of the Board of Managers, included two selections by the College Chorus, members of the orchestra, and guest instrumentalists, under the direction of Peter Gram Swing, and an address by President Friend. The academic procession was composed of members of the Board, Faculty, Student Council, and distinguished visitors. Among the nearly twenty college presidents who attended were those from Williams, President Friend’s alma mater; Pomona, which has an exchange program with Swarthmore; the University of Pennsylvania, Barnard, a number of nearby institutions, and some Quaker colleges. Some 50 other representatives from colleges, universities, and other institutions of higher learning also attended. In his address President Friend spoke of “the original aims of the College, of authority and responsibility in its current organization, of the principles of excellence and equality, and of reason and faith in the temper of all that we do here.” He found occasion to quote from the inaugural remarks of the sixth president of Swarthmore, Joseph Swain, in speaking of the relationship of the various con stituencies of the College to each other. “Perhaps because he, as I, came here from a state university, I easily share his perspective. -
A Needs Analysis Study of Amateur Astronomers for the National Virtual Observatory : Aaron Price1 Lou Cohen1 Janet Mattei1 Nahide Craig2
A Needs Analysis Study of Amateur Astronomers For the National Virtual Observatory : Aaron Price1 Lou Cohen1 Janet Mattei1 Nahide Craig2 1Clinton B. Ford Astronomical Data & Research Center American Association of Variable Star Observers 25 Birch St, Cambridge MA 02138 2Space Sciences Laboratory University of California, Berkeley 7 Gauss Way Berkeley, CA 94720-7450 Abstract Through a combination of qualitative and quantitative processes, a survey was con- ducted of the amateur astronomy community to identify outstanding needs which the National Virtual Observatory (NVO) could fulfill. This is the final report of that project, which was conducted by The American Association of Variable Star Observers (AAVSO) on behalf of the SEGway Project at the Center for Science Educations @ Space Sci- ences Laboratory, UC Berkeley. Background The American Association of Variable Star Observers (AAVSO) has worked on behalf of the SEGway Project at the Center for Science Educations @ Space Sciences Labo- ratory, UC Berkeley, to conduct a needs analysis study of the amateur astronomy com- munity. The goal of the study is to identify outstanding needs in the amateur community which the National Virtual Observatory (NVO) project can fulfill. The AAVSO is a non-profit, independent organization dedicated to the study of vari- able stars. It was founded in 1911 and currently has a database of over 11 million vari- able star observations, the vast majority of which were made by amateur astronomers. The AAVSO has a rich history and extensive experience working with amateur astrono- mers and specifically in fostering amateur-professional collaboration. AAVSO Director Dr. Janet Mattei headed the team assembled by the AAVSO. -
DOUBLE STARS INFORMATION CIRCULAR No. 202 (OCTOBER 2020)
INTERNATIONAL ASTRONOMICAL UNION COMMISSION G1 (BINARY AND MULTIPLE STAR SYSTEMS) DOUBLE STARS INFORMATION CIRCULAR No. 202 (OCTOBER 2020) NEW ORBITS ADS Name P T e Ω(2000) 2020 Author(s) α2000δ n a i ! Last ob. 2021 1762 A 207 1204y6 1937.27 0.816 31◦3 358◦9 000629 SCARDIA 02182+3920 0◦2989 000950 31◦1 193◦9 2020.771 359.2 0.635 et al. (*) 1477 WRH 39 Aa,Ab 29.59 1987.66 0.608 189.5 327.3 0.081 DOCOBO 02318+8916 12.1663 0.120 146.2 123.0 2014.4856 312.1 0.093 & CAMPO - COU 1688 AB 8.638 2003.841 0.198 49.2 247.6 0.121 DOCOBO 03321+4340 41.6763 0.139 35.5 268.2 2012.7023 308.0 0.092 & LING 3303 HU 1082 53.17 2023.24 0.746 108.9 221.1 0.151 DOCOBO 04349+3908 6.7707 0.362 48.9 216.3 2007.8019 240.7 0.132 & LING 3730 BU 1047 BC 34.38 2001.21 0.944 30.9 78.1 0.357 DOCOBO 05098+2802 10.4712 0.282 122.4 114.9 2007.8184 77.0 0.357 & CAMPO 11635 STF 2382 AB 2802.8 2051.49 0.953 149.6 344.3 2.169 DOCOBO 18443+3940 0.1284 14.237 102.2 258.8 2020.7470 344.0 2.148 & CAMPO 11635 STF 2383 CD 724.3 2223.9 0.353 26.5 74.3 2.399 DOCOBO 18443+3940 0.4970 2.920 126.1 73.8 2020.7470 73.9 2.402 & CAMPO 11635 CHR 77 Ca,Cb 15.75 2008.94 0.411 42.4 48.2 0.229 DOCOBO 18443+3940 22.8571 0.191 109.9 127.2 2005.5155 42.9 0.214 & CAMPO 13950 COU 1962 AB 20.414 1999.240 0.524 116.7 108.5 0.086 DOCOBO 20311+3333 17.6350 0.201 76.0 307.2 2008.5460 121.7 0.119 & CAMPO (*) SCARDIA, PRIEUR, PANSECCHI, LING, ARGYLE, ARISTIDI, ZANUTTA, ABE, BENDJOYA, RIVET, SUAREZ & VERNET 1 SARAH LEE LIPPINCOTT (1920-2019) Sarah Lee Lippincott was born in Philadelphia in 1920 and attended the University of Pennsylvania College for Women. -
Flaming Star the Flaming Star Nebula (IC 405) in the Constellation Auriga Is a Surprisingly Colorful and Dramatic Emission/Reflection Nebula
WESTCHESTER AMATEUR ASTRONOMERS January 2016 Image Copyright: Mauri Rosenthal Flaming Star The Flaming Star Nebula (IC 405) in the constellation Auriga is a surprisingly colorful and dramatic emission/reflection nebula. In This Issue . The most prominent star in the image is the variable blue dwarf AE pg. 2 Events For January Aurigae, burning with sufficient intensity to knock electrons off pg. 3 Almanac the hydrogen molecules found in a cloud 5 light years across, pg. 4 Vivian Towers which in turn emit red light. The bluish gray area is not from ion- pg. 5 The Radio Sky ized Oxygen (as found in the Veil Nebula); rather it is mostly a pg. 11 Kepler cloud of carbon dust, which reflects the blue light from the nearby pg. 12 President’s Report star. The result is an emission/reflection nebula 1500 light years distant and accessible from the suburbs with a small telescope. Mauri Rosenthal imaged this from his backyard in Scarsdale with a guided Questar 3.5” telescope over two nights in November using CLS (broadband) and H-alpha (narrowband) filters. Total exposure time was 9.5 hours. SERVING THE ASTRONOMY COMMUNITY SINCE 1986 1 WESTCHESTER AMATEUR ASTRONOMERS January 2016 WAA January Lecture Club Dates 2016 “Light Pollution” Friday January 8th, 7:30pm 2016 Lecture Dates Leinhard Lecture Hall, January 8 June 3 February 5 Sept. 16 Pace University, Pleasantville, NY March 4 October 7 Charles Fulco will speak on light pollution, the Inter- April 1 November 4 national Dark-Sky Association and preserving our May 6 December 2 night sky. -
GMRT 610 Mhz Observations of Galaxy Clusters in the ACT Equatorial Sample
MNRAS 000,1{26 (2018) Preprint 20 March 2019 Compiled using MNRAS LATEX style file v3.0 GMRT 610 MHz observations of galaxy clusters in the ACT equatorial sample Kenda Knowles,1? Andrew J. Baker,2 J. Richard Bond,3 Patricio A. Gallardo,4 Neeraj Gupta,5 Matt Hilton,1 John P. Hughes,2 Huib Intema,6 Carlos H. L´opez- Caraballo,7;8 Kavilan Moodley,1 Benjamin L. Schmitt,9 Jonathan Sievers,10 Crist´obal Sif´on,4;11 Edward Wollack,12 1Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Durban, 3690, South Africa 2Department of Physics and Astronomy, Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA 3Canadian Institute for Theoretical Astrophysics, 60 St. George Street, University of Toronto, Toronto, ON, M5S 3H8, Canada 4Department of Physics, Cornell University, Ithaca, NY USA 5IUCAA, Post Bag 4, Ganeshkhind, Pune 411007, India 6Leiden Observatory, Leiden University, PO Box 9513, NL2300 RA Leiden, Netherlands 7Instituto de Astrof´ısica and Centro de Astro-Ingenier´ıa, Facultad de F´ısica, Pontificia Universidad Cat´olica de Chile, Av. Vicu~na Mackenna 4860, 7820436 Macul, Santiago, Chile 8Departamento de Matem´aticas, Universidad de La Serena, Av. Juan Cisternas 1200, La Serena, Chile 9Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USA 10Astrophysics & Cosmology Research Unit, School of Chemistry & Physics, University of KwaZulu-Natal, Durban, 3690, South Africa 11Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA 12NASA/Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA Accepted XXX. -
16Th HEAD Meeting Session Table of Contents
16th HEAD Meeting Sun Valley, Idaho – August, 2017 Meeting Abstracts Session Table of Contents 99 – Public Talk - Revealing the Hidden, High Energy Sun, 204 – Mid-Career Prize Talk - X-ray Winds from Black Rachel Osten Holes, Jon Miller 100 – Solar/Stellar Compact I 205 – ISM & Galaxies 101 – AGN in Dwarf Galaxies 206 – First Results from NICER: X-ray Astrophysics from 102 – High-Energy and Multiwavelength Polarimetry: the International Space Station Current Status and New Frontiers 300 – Black Holes Across the Mass Spectrum 103 – Missions & Instruments Poster Session 301 – The Future of Spectral-Timing of Compact Objects 104 – First Results from NICER: X-ray Astrophysics from 302 – Synergies with the Millihertz Gravitational Wave the International Space Station Poster Session Universe 105 – Galaxy Clusters and Cosmology Poster Session 303 – Dissertation Prize Talk - Stellar Death by Black 106 – AGN Poster Session Hole: How Tidal Disruption Events Unveil the High 107 – ISM & Galaxies Poster Session Energy Universe, Eric Coughlin 108 – Stellar Compact Poster Session 304 – Missions & Instruments 109 – Black Holes, Neutron Stars and ULX Sources Poster 305 – SNR/GRB/Gravitational Waves Session 306 – Cosmic Ray Feedback: From Supernova Remnants 110 – Supernovae and Particle Acceleration Poster Session to Galaxy Clusters 111 – Electromagnetic & Gravitational Transients Poster 307 – Diagnosing Astrophysics of Collisional Plasmas - A Session Joint HEAD/LAD Session 112 – Physics of Hot Plasmas Poster Session 400 – Solar/Stellar Compact II 113 -
Where Are the Missing Baryons in Clusters?
1 Where Are the Missing Baryons in Clusters? Bilhuda Rasheed Adviser: Dr. Neta Bahcall Submitted in partial fulfillment of the requirements for the degree of Bachelor of Arts Department of Astrophysical Sciences Princeton University May 2010 I hereby declare that I am the sole author of this thesis. I authorize Princeton University to lend this thesis to other institutions or individuals for the purpose of scholarly research. Bilhuda Rasheed I further authorize Princeton University to reproduce this thesis by photocopying or by other means, in total or in part, at the request of other institutions or individuals for the purpose of scholarly research. Bilhuda Rasheed Abstract We address previous claims that the baryon fraction in clusters is significantly below the cosmic value of the baryon fraction as determined from WMAP 7-year results. We use X-ray and SZ observations to determine the slope of the gas density profile to R200. This is shallower than the slope of total mass density (NFW) profile. We use the gas density slope to extrapolate the X-ray observations of gas fraction at R500 to the virial radius (R100). The gas fraction increases beyond R500 for all cluster masses. We add the stellar fraction as determined from COSMOS and 2MASS samples, with ICL contributing 10% to the stellar fraction. For massive clusters 14 (M500 ∼ 7 × 10 M ), the baryon fraction reaches the cosmic baryon fraction at Rvir± 20%. Poorer clusters and groups typically reach 75–85% of the cosmic baryon fraction at the virial radius. We compare these results with simulations which take into account gravitational shock-heating, star formation, heating from SNe and AGN, and energy transfer from dark matter. -
MASS and LIGHT of ABELL 370: a STRONG and WEAK LENSING ANALYSIS ABSTRACT We Present a New Gravitational Lens Model of the Hubble
Draft version October 15, 2018 Preprint typeset using LATEX style emulateapj v. 01/23/15 MASS AND LIGHT OF ABELL 370: A STRONG AND WEAK LENSING ANALYSIS V. Strait1, M. Bradacˇ1, A. Hoag1, K.-H. Huang1, T. Treu2, X. Wang2,4, R. Amorin6,7, M. Castellano5, A. Fontana5, B.-C. Lemaux1, E. Merlin5, K.B. Schmidt3, T. Schrabback8, A. Tomczack1, M. Trenti9,10, and B. Vulcani9,11 1Physics Department, University of California, Davis, CA 95616, USA 2Department of Physics and Astronomy, UCLA, Los Angeles, CA, 90095-1547, USA 3Leibniz-Institut f¨urAstrophysik Postdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany 4Department of Physics, University of California, Santa Barbara, CA, 93106-9530, USA 5INAF - Osservatorio Astronomico di Roma Via Frascati 33 - 00040 Monte Porzio Catone, 00040 Rome, Italy 6Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, CB3 0HE, Cambridge, UK 7Kavli Institute for Cosmology, University of Cambridge, Madingley Rd., CB3 0HA, Cambridge, UK 8Argelander-Institut f¨urAstronomie, Auf dem H¨ugel71, D-53121 Bonn, Germany 9School of Physics, University of Melbourne, Parkville, Victoria, Australia 10ARC Centre of Excellence fot All Sky Astrophysics in 3 Dimensions (ASTRO 3D) and 11INAF - Astronomical Observatory of Padora, 35122 Padova, Italy Draft version October 15, 2018 ABSTRACT We present a new gravitational lens model of the Hubble Frontier Fields cluster Abell 370 (z = 0:375) using imaging and spectroscopy from Hubble Space Telescope and ground-based spectroscopy. We combine constraints from a catalog of 909 weakly lensed galaxies and 39 multiply-imaged sources comprised of 114 multiple images, including a system of multiply-imaged candidates at z = 7:84 ± 0:02, to obtain a best-fit mass distribution using the cluster lens modeling code Strong and Weak Lensing United. -
List of Reserved Targets Sent to GRANTECAN for the Exploitation of the MEGARA Guaranteed Time at GTC
List of Reserved Targets sent to GRANTECAN for the exploitation of the MEGARA Guaranteed Time at GTC List of Reserved Targets sent to GRANTECAN for the exploitation of the MEGARA Guaranteed Time at GTC List of Reserved Targets sent to GRANTECAN for the exploitation of the MEGARA Guaranteed Time at GTC INDEX 1. MEGADES – MEGARA GALAXY DISKS EVOLUTION SURVEY: S4G .................. 3 2. MEGADES – MEGARA GALAXY DISKS EVOLUTION SURVEY: M33 ............... 11 3. SPECTROSCOPIC STUDY OF COMPACT STELLAR CLUSTERS AND THEIR SURROUNDINGS IN NEARBY GALAXIES ........................................................................ 12 4. THE CHEMICAL COMPOSITION OF PHOTOIONIZED NEBULAE¡ERROR! MARCADOR NO DEFINIDO. 5. CHROMOSPHERIC ACTIVITY AND AGE OF SOLAR ANALOGS IN OPEN CLUSTERS ................................................................ ¡ERROR! MARCADOR NO DEFINIDO. 6. STUDY OF STELLAR POPULATIONS AND GAS PROPERTIES IN STAR FORMING GALAXIES ............................................................................................................ 14 7. DISSECTING Z∼2-3 HEII-EMITTERS: SPECTRAL TEMPLATES FOR THE SOURCES OF THE COSMIC DAWN ................................................................................... 16 8. CHEMODYNAMICS OF METAL-POOR EXTREME EMISSION LINE GALAXIES AT INTERMEDIATE Z ...................................................................................... 18 9. CONSTRAINING WOLF-RAYET STARS IN EXTREMELY METAL-POOR GALAXIES ................................................................................................................................ -
Who Actually Invented the Astronomical Telescope?
The International Year of Astronomy Vision To help the citizens of the world rediscover their place in the Universe through the day and night time sky, and thereby engage a personal sense of wonder and discovery. Celebration A global celebration of astronomy and its contributions to society and culture, highlighted by the 400th anniversary of the first use of an astronomical telescope by Galileo. Goals & Objectives Increase scientific awareness. Promote widespread access to new knowledge and observing experiences. Empower astronomical communities in developing countries. Support and improve formal and informal science education. Provide a modern image of science and scientists. Facilitate new networks and strengthen existing ones. Improve the gender-balanced representation of scientists at all levels and promote greater involvement by underrepresented minorities in scientific and engineering careers. Facilitate the preservation and protection of the world’s cultural and natural heritage of dark skies and historical astronomical sites. Organisational Structure IAU President: Catherine Cesarsky IAU General Secretary: Karel van der Hucht Chair: Catherine Cesarsky Secretary: Lars Lindberg Christensen Coordinator: Pedro Russo Organisational Current Status (203 days to go…) 118 National Nodes / Aim: 140 Nations 64 National Websites 20 Organisational Nodes 16 Organisational Associates 11 Cornerstone Projects 2 Special Projects 11 Special Task Groups 100 Hours of Astronomy • 100 Hours of Astronomy Global Cornerstone Project • Task group co-chairs: -
An ISOCAM Survey Through Gravitationally Lensing Galaxy Clusters
A&A 431, 433–449 (2005) Astronomy DOI: 10.1051/0004-6361:20041782 & c ESO 2005 Astrophysics An ISOCAM survey through gravitationally lensing galaxy clusters IV. Luminous infrared galaxies in Cl 0024+1654 and the dynamical status of clusters D. Coia1, B. McBreen1,L.Metcalfe2,3,A.Biviano4, B. Altieri2,S.Ott5,B.Fort6,J.-P.Kneib7,8, Y. Mellier6,9, M.-A. Miville-Deschênes10 , B. O’Halloran1,11, and C. Sanchez-Fernandez2 1 Department of Experimental Physics, University College, Belfield, Dublin 4, Ireland e-mail: [email protected] 2 XMM-Newton Science Operations Centre, European Space Agency, Villafranca del Castillo, PO Box 50727, 28080 Madrid, Spain 3 ISO Data Centre, European Space Agency, Villafranca del Castillo, PO Box 50727, 28080 Madrid, Spain 4 INAF/Osservatorio Astronomico di Trieste, via G.B. Tiepolo 11, 34131, Trieste, Italy 5 Science Operations and Data Systems Division of ESA, ESTEC, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands 6 Institut d’Astrophysique de Paris, 98 bis boulevard Arago, 75014 Paris, France 7 Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, 31400 Toulouse, France 8 California Institute of Technology, Pasadena, CA 91125, USA 9 Observatoire de Paris, 61 avenue de l’Observatoire, 75014 Paris, France 10 Canadian Institute for Theoretical Astrophysics, 60 St-George Street, Toronto, Ontario M5S 3H8, Canada 11 Dunsink Observatory, Castleknock, Dublin 15, Ireland Received 3 August 2004 / Accepted 26 October 2004 Abstract. Observations of the core of the massive cluster Cl 0024+1654, at a redshift z ∼ 0.39, were obtained with the Infrared Space Observatory using ISOCAM at 6.7 µm (hereafter 7 µm) and 14.3 µm (hereafter 15 µm). -
Aworldwideastronomy
hours100 Hours of Astronomy of Astronomy Y.NET.NZ) M AWorldwideAstronomy PAUL MOSS (WWW.ASTRONO MARATHON Grab your scopes and friends and head outside! Early April will be amateur astronomy’s time to shine for the International Year of Astronomy 2009. If you have a telescope, mark April 2–5 on your calen- star party will sweep around the world, with local gather- dar. The world is coming your way. ings beginning as darkness descends. Even city street cor- An unprecedented string of public skywatching events ners will come alive, with the third annual International will be packed into this brief period, all designed to engage Sidewalk Astronomy Night happening the first weekend people and bring them out for a worldwide star party that in April. Thus many sidewalk astronomy regulars will will cap the program on Saturday evening, April 4th. already be at their stations. Collectively, the period is called “100 Hours of Astron- omy.” It’s a Cornerstone Project of the International Year Get Involved of Astronomy 2009 (January issue, page 82) tailor-made This will be the largest amateur astronomy outreach for amateurs who’d like to try some out- event ever held, and everyone with a telescope is needed. MIKE SImmONS reach. During the final 24 hours a global Whether you’re an expert or a newbie yourself, whether your scope gets used regularly or has been relegated to a JOIN THE PARTY It will be a worldwide celebration April 2–5, as the Interna- garage or closet, someone new should get their chance to tional Year of Astronomy marks 100 Hours of Astronomy with public viewing, live see the heavens up close with it.