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Active Galactic Nuclei and Their Neighbours
CCD Photometric Observations of Active Galactic Nuclei and their Neighbours by Traianou Efthalia A dissertation submitted in partial fulfillment of the requirements for the degree of Ptychion (Physics) in Aristotle University of Thessaloniki September 2016 Supervisor: Manolis Plionis, Professor To my loved ones Many thanks to: Manolis Plionis for accepting to be my thesis adviser. ii TABLE OF CONTENTS DEDICATION :::::::::::::::::::::::::::::::::: ii LIST OF FIGURES ::::::::::::::::::::::::::::::: v LIST OF TABLES :::::::::::::::::::::::::::::::: ix LIST OF APPENDICES :::::::::::::::::::::::::::: x ABSTRACT ::::::::::::::::::::::::::::::::::: xi CHAPTER I. Introduction .............................. 1 II. Active Galactic Nuclei ........................ 4 2.1 Early History of AGN’s ..................... 4 2.2 AGN Phenomenology ...................... 7 2.2.1 Seyfert Galaxies ................... 7 2.2.2 Low Ionization Nuclear Emission-Line Regions(LINERS) 10 2.2.3 ULIRGS ........................ 11 2.2.4 Radio Galaxies .................... 12 2.2.5 Quasars or QSO’s ................... 14 2.2.6 Blazars ......................... 15 2.3 The Unification Paradigm .................... 16 2.4 Beyond the Unified Model ................... 18 III. Research Goal and Methodology ................. 21 3.1 Torus ............................... 21 3.2 Ha Balmer Line ......................... 23 3.3 Galaxy-Galaxy Interactions ................... 25 3.4 Our Aim ............................. 27 iii IV. Observations .............................. 29 4.1 The Telescope -
Intentos Argentinos Para Probar La Teor´Ia De La Relatividad
Asociaci´on Argentina de Astronom´ıa BAAA, Vol. 50, 2007 G. Dubner, M. Rovira, A. Piatti & F. A. Bareilles, eds. PRESENTACION´ ORAL Intentos argentinos para probar la Teor´ıa de la Relatividad Santiago Paolantonio1 & Edgardo R. Minitti2 (1) Museo Astron´omico Sarmiento-Gould, Observatorio Astron´omico, Universidad Nacional de C´ordoba, Argentina (2) Observatorio Astron´omico, Universidad Nacional de C´ordoba, Argentina Abstract. Astrophysics research at the Argentinean National Observa- tory (Cordoba) began during the period when Dr. Charles Perrine was its Director (1909-1936). In 1911 Perrine was invited by Dr. Freundlich (Berlin Observatory) to carry out observations in Brazil during the solar eclipse that would take place on October 10, 1912, with the aim of verify- ing Einstein’s theory of relativity. With numerous instruments specially designed and constructed in Cordoba, the expedition took place. How- ever, an inopportune rain made fail all the project. Poor weather condi- tions made also fail two new attempts, one in Teodesy (Ukraine; August 21, 1914), and the other in Tucacas (Venezuela; February 3, 1916). Suc- cessful observations and verification of Einstein’s predictions finally took place in 1919, during an eclipse observed in Brazil. The Argentinean Observatory was unfortunately absent in such opportunity. Resumen. Durante la direcci´on del Dr. Charles Perrine (1909-1936) se inician en el Observatorio Nacional Argentino los trabajos relacionados con la Astrof´ısica. En 1911, Perrine es contactado por el Dr. Freundlich del Observatorio de Berl´ın, quien le propone realizar observaciones para verificar la Teor´ıa de la Relatividad en el eclipse del 10 de octubre de 1912 que ocurrir´ıa en Brasil. -
How Supernovae Became the Basis of Observational Cosmology
Journal of Astronomical History and Heritage, 19(2), 203–215 (2016). HOW SUPERNOVAE BECAME THE BASIS OF OBSERVATIONAL COSMOLOGY Maria Victorovna Pruzhinskaya Laboratoire de Physique Corpusculaire, Université Clermont Auvergne, Université Blaise Pascal, CNRS/IN2P3, Clermont-Ferrand, France; and Sternberg Astronomical Institute of Lomonosov Moscow State University, 119991, Moscow, Universitetsky prospect 13, Russia. Email: [email protected] and Sergey Mikhailovich Lisakov Laboratoire Lagrange, UMR7293, Université Nice Sophia-Antipolis, Observatoire de la Côte d’Azur, Boulevard de l'Observatoire, CS 34229, Nice, France. Email: [email protected] Abstract: This paper is dedicated to the discovery of one of the most important relationships in supernova cosmology—the relation between the peak luminosity of Type Ia supernovae and their luminosity decline rate after maximum light. The history of this relationship is quite long and interesting. The relationship was independently discovered by the American statistician and astronomer Bert Woodard Rust and the Soviet astronomer Yury Pavlovich Pskovskii in the 1970s. Using a limited sample of Type I supernovae they were able to show that the brighter the supernova is, the slower its luminosity declines after maximum. Only with the appearance of CCD cameras could Mark Phillips re-inspect this relationship on a new level of accuracy using a better sample of supernovae. His investigations confirmed the idea proposed earlier by Rust and Pskovskii. Keywords: supernovae, Pskovskii, Rust 1 INTRODUCTION However, from the moment that Albert Einstein (1879–1955; Whittaker, 1955) introduced into the In 1998–1999 astronomers discovered the accel- equations of the General Theory of Relativity a erating expansion of the Universe through the cosmological constant until the discovery of the observations of very far standard candles (for accelerating expansion of the Universe, nearly a review see Lipunov and Chernin, 2012). -
Francis Gladheim Pease Papers: Finding Aid
http://oac.cdlib.org/findaid/ark:/13030/c8988d3d No online items Francis Gladheim Pease Papers: Finding Aid Finding aid prepared by Brooke M. Black, September 11, 2012. The Huntington Library, Art Collections, and Botanical Gardens Manuscripts Department 1151 Oxford Road San Marino, California 91108 Phone: (626) 405-2129 Email: [email protected] URL: http://www.huntington.org © 2012 The Huntington Library. All rights reserved. Francis Gladheim Pease Papers: mssPease papers 1 Finding Aid Overview of the Collection Title: Francis Gladheim Pease Papers Dates (inclusive): 1850-1937 Bulk dates: 1905-1937 Collection Number: mssPease papers Creator: Pease, F. G. (Francis Gladheim), 1881- Extent: Approximately 4,250 items in 18 boxes Repository: The Huntington Library, Art Collections, and Botanical Gardens. Manuscripts Department 1151 Oxford Road San Marino, California 91108 Phone: (626) 405-2129 Email: [email protected] URL: http://www.huntington.org Abstract: This collection consists of the research papers of American astronomer Francis Pease (1881-1938), one of the original staff members of the Mount Wilson Solar Observatory. Language: English. Access Open to qualified researchers by prior application through the Reader Services Department. For more information, contact Reader Services. Publication Rights The Huntington Library does not require that researchers request permission to quote from or publish images of this material, nor does it charge fees for such activities. The responsibility for identifying the copyright holder, if there is one, and obtaining necessary permissions rests with the researcher. Preferred Citation [Identification of item]. Francis Gladheim Pease Papers, The Huntington Library, San Marino, California. Provenance Deposit, Observatories of the Carnegie Institution of Washington Collection , 1988. -
Astrophysics in 2006 3
ASTROPHYSICS IN 2006 Virginia Trimble1, Markus J. Aschwanden2, and Carl J. Hansen3 1 Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575, Las Cumbres Observatory, Santa Barbara, CA: ([email protected]) 2 Lockheed Martin Advanced Technology Center, Solar and Astrophysics Laboratory, Organization ADBS, Building 252, 3251 Hanover Street, Palo Alto, CA 94304: ([email protected]) 3 JILA, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder CO 80309: ([email protected]) Received ... : accepted ... Abstract. The fastest pulsar and the slowest nova; the oldest galaxies and the youngest stars; the weirdest life forms and the commonest dwarfs; the highest energy particles and the lowest energy photons. These were some of the extremes of Astrophysics 2006. We attempt also to bring you updates on things of which there is currently only one (habitable planets, the Sun, and the universe) and others of which there are always many, like meteors and molecules, black holes and binaries. Keywords: cosmology: general, galaxies: general, ISM: general, stars: general, Sun: gen- eral, planets and satellites: general, astrobiology CONTENTS 1. Introduction 6 1.1 Up 6 1.2 Down 9 1.3 Around 10 2. Solar Physics 12 2.1 The solar interior 12 2.1.1 From neutrinos to neutralinos 12 2.1.2 Global helioseismology 12 2.1.3 Local helioseismology 12 2.1.4 Tachocline structure 13 arXiv:0705.1730v1 [astro-ph] 11 May 2007 2.1.5 Dynamo models 14 2.2 Photosphere 15 2.2.1 Solar radius and rotation 15 2.2.2 Distribution of magnetic fields 15 2.2.3 Magnetic flux emergence rate 15 2.2.4 Photospheric motion of magnetic fields 16 2.2.5 Faculae production 16 2.2.6 The photospheric boundary of magnetic fields 17 2.2.7 Flare prediction from photospheric fields 17 c 2008 Springer Science + Business Media. -
Vendedores De Estrelas
UNIVERSIDADE FEDERAL DA BAHIA UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA PROGRAMA DE PÓS-GRADUAÇÃO EM ENSINO, FILOSOFIA E HISTÓRIA DAS CIÊNCIAS Vendedores de estrelas A existência de outras galáxias pela mídia de massa norte-americana na década de 20. Victória Flório Pires de Andrade Orientação: Olival Freire Júnior Salvador 2017 UNIVERSIDADE FEDERAL DA BAHIA UNIVERSIDADE ESTADUAL DE FEIRA DE SANTANA PROGRAMA DE PÓS-GRADUAÇÃO EM ENSINO, FILOSOFIA E HISTÓRIA DAS CIÊNCIAS Vendedores de estrelas A existência de outras galáxias pela mídia de massa norte-americana na década de 20. Victória Flório Pires de Andrade Orientação: Olival Freire Júnior Salvador 2017 A função do historiador é lembrar à sociedade aquilo que ela quer esquecer. — Peter Burke. Ilustração – “Os vendedores de estrelas”, Victória Flório Pires de Andrade. Agradecimentos “O Brasil é feito por nós. Basta saber desatá-los”. — Barão de Itararé Quanto mais avança o tempo na direção do futuro, mais sentimos o peso da história sobre o presente. Neste ano de 2017, experimentamos de maneira fugaz o passar e o pesar do tempo. Há cem anos, no fatídico 1917, os russos fariam estourar a agora centenária revolução. Os norte-americanos deixaram a neutralidade e entraram na primeira guerra contra os alemães. Há 100 anos da Greve Geral de 1917, aqui no Brasil, e que acaba de acontecer novamente, e, em dose dupla, no 28 de abril e no 30 de junho. Há quase cem anos, as mulheres norte-americanas ganhavam direito ao voto, depois de 40 anos na luta. Na mitologia grega, o titã Atlas é quem o mundo carrega, mas como se sente o Ano de 2017 com o peso desses centenários e quase-centenários nas costas? Senti a necessidade de deixar registrado, para o futuro, e, nesta tese, pelo menos um sopro sobre o frustrante momento atual que vivemos. -
The Legacy of Einstein's Eclipse, Gravitational Lensing
The Legacy of Einstein’s Eclipse, Gravitational Lensing Jorge L. Cervantes-Cota 1, Salvador Galindo-Uribarri 1 and George F. Smoot 2,3,4,* 1 Department of Physics, National Institute for Nuclear Research, Km 36.5 Carretera Mexico-Toluca, Ocoyoacac, C.P.52750 Mexico State, Mexico; [email protected] (J.L.C.-C.); [email protected] (S.G.-U.) 2 IAS TT & WF Chao Foundation Professor, Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 3 Université Sorbonne Paris Cité, Laboratoire APC-PCCP, Université Paris Diderot, 10 rue Alice Domon et Leonie Duquet, CEDEX 13, 75205 Paris, France 4 Department of Physics and LBNL, University of California, MS Bldg 50-5505 LBNL, 1 Cyclotron Road, Berkeley, CA 94720, USA * Correspondence: [email protected]; Tel.: +1-510-486-5505 Abstract: A hundred years ago, two British expeditions measured the deflection of starlight by the Sun’s gravitational field, confirming the prediction made by Einstein’s General Theory of Relativity. One hundred years later many physicists around the world are involved in studying the consequences and use as a research tool, of the deflection of light by gravitational fields, a discipline that today receives the generic name of Gravitational Lensing. The present review aims to commemorate the centenary of Einstein’s Eclipse expeditions by presenting a historical perspective of the development and milestones on gravitational light bending, covering from early XIX century speculations, to its current use as an important research tool in astronomy and cosmology. Keywords: gravitational lensing; history of science PACS: 01.65.+g; 98.62.Sb 1. -
I N S I D E T H I S I S S
February / février 2008 Volume/volume 102 Number/numéro 1 [728] This Issue's Winning Astrophoto! FEATURING A FULL COLOUR SECTION! The Journal of the Royal Astronomical Society of Canada Cassiopeia Rising Over the Plaskett by Charles Banville, Victoria Centre. This is a montage of two pictures I took using a Canon 20Da and a Canon EF 17-40mm f/4L lens. The foreground image was acquired at the Dominion Astrophysical Observatory in Victoria on 2007 July 26. That evening the Plaskett Dome was illuminated by a bright 12-day-old Moon. The star trails were created using 87 light frames of 1 minute each taken from Cattle Point on 2007 August 8. Le Journal de la Société royale d’astronomie du Canada [Editor’s Note: The two-member team of Dietmar Kupke and Paul Mortfield of the Toronto Centre selected this late-entry image from among the 30 or so entries to the “Own the Back Cover” con- test. Thanks to all the submitters. We welcome further entries, so don’t delay – send in yours now! INSIDE THIS ISSUE Watch the back cover of the April issue for the next winner.] One Hundred Editions of the Observer's Handbook · Seriously Seeking Ceres! Mont-Mégantic Dark-Sky Reserve Conference, 2007 September 19-21 Duplicity of ZC1042: My First Double-Star Discovery In Memory of Gertrude Jean Southam Building for the International Year of Astronomy (IYA2009) THE ROYAL ASTRONOMICAL SOCIETY OF CANADA February / février 2008 NATIONAL OFFICERS AND COUNCIL FOR 2007-2008/CONSEIL ET ADMINISTRATEURS NATIONAUX Honorary President Robert Garrison, Ph.D., Toronto President Scott Young, B.Sc., Winnipeg Vol. -
El Inquieto Señor Charles Dillon Perrine
Notas de Astronomía Latinoamericana EL INQUIETO SEÑOR CHARLES DILLON PERRINE Edgardo Ronald Minniti Morgan Premio Herbert C. Pollock 2005 Grupo de Investigación en Enseñanza, Historia y Divulgación de la Astronomía- Observatorio de Córdoba - historiadelaastronomia.wordpress.com – HistoLIADA Miembro de la Red Mundial de Escritores - REMES Erupción solar- Imagen tomada desde Alhama, España, el 30 de Agosto de 1905 - PASP Pese a todo lo que dicen por ahí, respecto de la frialdad de la astronomía, pudimos desmentir tal supuesto con pruebas elocuentes respecto de la visita y permanencia activa de sus practicantes, los astrónomos, al área supuestamente “no contaminada” del arte. Esa circunstancia fue objeto de una consideración especial en una nota anterior independiente (“De la Astronomía y el Arte”). También lo fue del drama y la tragedia (En “Astronomía Trágica”). Hoy, a más de un siglo de la iniciación de la astronomía nacional, no podemos sino rememorar en su homenaje al tercer director norteamericano del Observatorio de Córdoba, recordando los notables primeros pasos del astrónomo que tanto dio a la Argentina - permitiendo su incorporación a la astrofísica - y una tierna circunstancia “casi rosa”, de un atípico pero cierto regalo de bodas que le efectuara el más importante observatorio estadounidense de la época. Nos referimos a Charles Dillon Perrine, que el 4 de Julio de 1905 contrajera enlace con Bell Smith, bibliotecaria del observatorio de Lick, donde trabajaban ambos. Bell y Charles recién casados, en Alhama (España) - 1905 La boda se celebró en Filadelfia, en casa de una hermana de ella. Con ese motivo, el citado astrónomo abandonó su residencia de soltero en el 211 de Clay Street, San Francisco, a pocos metros de la zona portuaria, para trasladarse de luna de miel con su esposa al 52 de la 20th Street de Hermosa Beach, una conocida playa de la zona. -
Charles D. Perrine, Desde El Lick Observatory Al Observatorio Nacional Argentino
Charles D. Perrine, desde el Lick Observatory al Observatorio Nacional Argentino. Santiago Paolantonio Premio H. C. Pollock 2005 [email protected] historiadelaastronomia.wordpress.com El 16 de junio se cumplió un nuevo aniversario de la puesta en funciones del tercer director titular del Observatorio Nacional Argentino, Charles D. Perrine, último de los estadounidenses que conducirían la institución científica pionera argentina. Este acontecimiento marcó el inicio de una nueva etapa para el observatorio, dado que durante la nueva administración comenzó un proceso de transformación de sus objetivos científicos, variando de los puramente astrométricos a los astrofísicos, rama en la cual la institución se destacaría a nivel internacional a lo largo del siglo XX. En este período se llevaron adelante los primeros estudios sistemáticos de objetos nebulosos del hemisferio sur utilizando la fotografía y la espectroscopía, la observación de eclipses solares – entre cuyos objetivos se incluía la verificación de la teoría de Einstein – y una extensa serie de trabajos sobre cometas , entre ellos el famoso Halley . Se contrató el primer espectroscopista y la primera astrónoma . También se emprendió la construcción de instrumentos astronómicos, tal el caso del gran reflector de 76 cm . Pero el hecho más destacable fue el inicio de la construcción de la Estación Astrofísica de Bosque Alegre , la que tuvo una importancia crucial en el posterior desarrollo de la astrofísica nacional. Todo esto se realizó sin descuidar los trabajos astrométricos, -
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Iau Commission C3 Newsletter
IAU COMMISSION C3 NEWSLETTER HISTORY OF ASTRONOMY Welcome to the winter solstice edition of the newsletter We wish everyone health and happiness in the new year. of IAU Commission C3 (History of Astronomy). This The next issue of the newsletter will be in June 2021. issue features the announcement of a new Project Group Please send our Secretary any news you would like us to and reports of pre-existing Working Groups and Project include. Groups since the last newsletter in June 2020. It contains Sara Schechner, Secretary news of upcoming conferences, reports of recent Wayne Orchiston, President meetings, a list of notable publications, and tables of Christiaan Sterken, Vice-President content from a journal devoted to the history of astronomy. The newsletter also contains announcements of research and PhD opportunities in the history of TABLE OF CONTENTS astronomy as well as an introduction to a new Ourania Network. And of course, you will find news from Reports of Working Groups & Project Groups 2 members, announcements of awards, and obituaries. Making History 15 Oral History 24 We are excited to introduce some new sections to the Art & Exhibitions 26 newsletter. The “Making History” section includes Announcements 30 reports on the Astronomy Genealogy Project (AstroGen), Awards and Honors 34 analysis of the Vatican Observatory’s guest book, and the News from Members 35 rescue of a medieval manuscript by Lewis of Caerleon. In In Memoriam 37 the “Oral History” section, there is a first-hand account Notable Publications 39 of the founding of the Journal of Astronomical History and Journal Contents 41 Heritage.