LOW Résolution Spectroscopy
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ANKARA ÜNİVERSİTESİ FEN BİLİMLERİ ENSTİTÜSÜ YÜKSEK LİSANS TEZİ ÖRTEN DEĞİŞEN YILDIZLARDA DÖNEM DEĞİŞİMİNİN YILDIZLARIN FİZİKSEL PARAMETRELERİNE BAĞIMLILIĞININ ARAŞTIRILMASI Uğurcan SAĞIR ASTRONOMİ VE UZAY BİLİMLERİ ANABİLİM DALI ANKARA 2006 Her hakkı saklıdır TEŞEKKÜR Tez çalışmam esnasında bana araştırma olanağı sağlayan ve çalışmamın her safhasında yakın ilgi ve önerileri ile beni yönlendiren danışman hocam Sayın Yrd.Doç.Dr. Birol GÜROL’a ve maddi manevi her türlü desteği benden esirgemeyen aileme teşekkürlerimi sunarım. Uğurcan SAĞIR Ankara, Şubat 2006 iii İÇİNDEKİLER ÖZET………………………………………………………………….......................... i ABSTRACT……………………………………………………………....................... ii TEŞEKKÜR……………………………………………………………...................... iii SİMGELER DİZİNİ…………………………………………………….................... vii ŞEKİLLER DİZİNİ...................................................................................................... x ÇİZELGELER DİZİNİ.............................................................................................. xiv 1. GİRİŞ........................................................................................................................ 1 1.1 Çalışmanın Kapsamı................................................................................................ 1 1.2 Örten Çift Sistemlerin Türleri ve Özellikleri........................................................ 1 2. KURAMSAL TEMELLER................................................................................... 3 2.1 Örten Değişen Yıldızlarda Dönem Değişim Nedenleri.................................. -
Bonn Max-Planck-Institut Für Radioastronomie A
Jahresbericht 2016 für die „Mitteilungen der Astronomischen Gesellschaft“ Bonn Max-Planck-Institut für Radioastronomie Auf dem Hügel 69, 53121 Bonn Tel.: (0 228) 525-0, Telefax: (0 228) 525-229 E-Mail: [email protected] Internet: http://www.mpifr.de 1 Allgemeines Das Max-Planck-Institut für Radioastronomie (MPIfR) wurde zum 01.01.1967 gegründet und zog 1973 in das heutige Gebäude ein, das in den Jahren 1983 und 2002 wesentlich erweitert wurde. Im Mai 1971 wurde das 100m-Radioteleskop in Bad Münstereifel-Effelsberg eingeweiht. Der volle astronomische Messbetrieb begann ab August 1972. Im November 2007 erfolgten Übergabe und Start des regulären Messbetriebs der ersten deutschen Station des Niederfrequenz-Radioteleskops LOFAR (LOw Frequency ARray) am Standort Effelsberg. Seit November 2009 arbeitet die LOFAR-Station Effelsberg durch Hinzunahme der „Highband“-Antennen im vollen Frequenzumfang. Im Jahr 2011 konnte das 40-jährige Jubiläum der Eröffnung des 100m-Teleskops gefeiert werden. Das 1985 in Betrieb genommene 30m-Teleskop für Millimeterwellen-Radioastronomie (MRT) auf dem Pico Veleta (bei Granada/Spanien) wurde noch im selben Jahr an das neu gegründete Institut für Radioastronomie im Millimeterwellenbereich (IRAM) übergeben. Im September 1993 erfolgte die Einweihung des für den submm-Bereich vorgesehenen 10m-Heinrich-Hertz-Teleskops (HHT) auf dem Mt. Graham (Arizona/USA), das bis Juni 2004 gemeinsam mit dem Steward-Observatorium der Universität von Arizona betrieben wurde. Das 12m APEX Submillimeter-Teleskop (Atacama Pathfinder EXperiment) wurde in der chilenischen Atacama-Wüste in einer Höhe von 5100 m über dem Meeresspiegel vom Institut errichtet und wird seit September 2005 von der Europäischen Südsternwarte (ESO) in Zusammenarbeit mit dem MPIfR und der schwedischen Sternwarte Onsala (OSO) betrieben. -
Information Bulletin on Variable Stars
COMMISSIONS AND OF THE I A U INFORMATION BULLETIN ON VARIABLE STARS Nos March November EDITORS L SZABADOS K OLAH TECHNICAL EDITOR A HOLL TYPESETTING K ORI ADMINISTRATION Zs KOVARI EDITORIAL BOARD L A BALONA M BREGER E BUDDING M deGROOT E GUINAN D S HALL P HARMANEC M JERZYKIEWICZ K C LEUNG M RODONO N N SAMUS J SMAK C STERKEN H BUDAPEST XI I Box HUNGARY HU ISSN COPYRIGHT NOTICE IBVS is published on b ehalf of the th and nd Commissions of the IAU by the Konkoly Observatory Budap est Hungary Individual issues could b e downloaded for scientic and educational purp oses free of charge Bibliographic information of the recent issues could b e entered to indexing sys tems No IBVS issues may b e stored in a public retrieval system in any form or by any means electronic or otherwise without the prior written p ermission of the publishers Prior written p ermission of the publishers is required for entering IBVS issues to an electronic indexing or bibliographic system to o CONTENTS E PAUNZEN G HANDLER Pulsation of HD and HD :::: E PAUNZEN WW WEISS R KUSCHNIG Nonvariability among Bo o Star I ESO and Data :::::::::::::::::::::::::::::::::: PA HECKERT Photometry of SV Camelopardalis :::::::::::::::: M WOLF L SAROUNOVA P MOLIK Period Changes in V Ophiuchi ::::::::::::::::::::::::::::::::::::::::::::::::::: ::::::::::::: RM ROBB MD GLADDERS Optical Observations of the Active Star FF Cancri ::::::::::::::::::::::::::::::::::::::::::::::::::: ::::::: U BASTIAN E BORN F AGERER M DAHM V GROSSMANN V MAKAROV Conrmation of the -
May 2020 BRAS Newsletter
A Covid photo courtesy of the Center For Disease Control and Prevention. Monthly Meeting May 11th at 7:00 PM, at HOME (Monthly meetings are on 2nd Mondays, routinely at Highland Road Park Observatory). PRESENTATION: (Meeting to be held via Zoom Webinar, due to current COVID-19 Quarentine) Our speaker will be Greg Andrews, on Dark Matter. He is a former president of the Shreveport-Bossier Astronomical Society and the Planetarium Manager at Sci-Port Discovery Center in Shreveport. What's In This Issue? President’s Message Secretary's Summary Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night Messages from the HRPO Science Academy Solar Viewing Friday Night Lecture Series Stem Expansion Plus Night American Radio Relay League Observing Notes: Hydra – The Water Snaker & Mythology Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 21 May 2020 President’s Message And that was April. Despite adverse conditions at times, we had some absolutely stunningly clear nights over the past couple of weeks so I hope everybody found some time to go out and do a little observing or imaging. With a little bit of luck, we can get a few more of these evenings after our quarantine is over so we can get in a little more scope time before the mosquitoes muster their numbers. Unfortunately, April saw the loss of two very promising comets, but we were introduced to a new Comet in Swan, which early indications suggest could be a pretty nice early evening comet. -
Spectroscopic Atlas for Amateur Astronomers 1
Spectroscopic Atlas for Amateur Astronomers 1 Spectroscopic Atlas for Amateur Astronomers A Guide to the Stellar Spectral Classes Richard Walker Version 4.0 04/2013 Spectroscopic Atlas for Amateur Astronomers 2 Table of Content 1 Introduction .................................................................................................................... 11 2 Selection, Preparation and Presentation of the Spectra ........................................ 13 2.1 Selection of Spectra ............................................................................................................................. 13 2.2 Recording and Resolution of the Spectra ........................................................................................ 13 2.3 The Processing of the Spectra ........................................................................................................... 14 2.4 Calibration of the Wavelength ........................................................................................................... 14 2.5 Normalisation of the Intensity ............................................................................................................ 15 2.6 Line Identification ................................................................................................................................. 15 2.7 Presentation .......................................................................................................................................... 15 3 Terms, Definitions and Abbreviations....................................................................... -
Appearance of Special UGSU-Type Phenomenon in the Light Curve of UGZ White Dwarf Nova RX Andromedae
Volume 44 Number 1 JAAVSO 2016 The Journal of the American Association of Variable Star Observers Appearance of Special UGSU-Type Phenomenon in the Light Curve of UGZ White Dwarf Nova RX Andromedae RX And superoutburst at JD 2456987. The superoutburst of about 10.7 magnitude is superpositioned on the precursor normal outburst of about 11.0 magnitude. Also in this issue... • Long-term Radial Velocity Monitoring of the HeI 6678 Line of ζ Tauri • Monitoring the Continuing Spectral Evolution of Nova Delphini 2013 (V339 Del) with Low Resolution Spectroscopy • Intermittent Multi-color Photometry for V1017 Sagittarii Complete table of contents inside... The American Association of Variable Star Observers 49 Bay State Road, Cambridge, MA 02138, USA The Journal of the American Association of Variable Star Observers Editor John R. Percy Edward F. Guinan Paula Szkody Dunlap Institute of Astronomy Villanova University University of Washington and Astrophysics Villanova, Pennsylvania Seattle, Washington and University of Toronto Toronto, Ontario, Canada John B. Hearnshaw Nikolaus Vogt University of Canterbury Universidad de Valparaiso Associate Editor Christchurch, New Zealand Valparaiso, Chile Elizabeth O. Waagen Laszlo L. Kiss Douglas L. Welch Production Editor Konkoly Observatory McMaster University Michael Saladyga Budapest, Hungary Hamilton, Ontario, Canada Katrien Kolenberg David B. Williams Editorial Board Universities of Antwerp Whitestown, Indiana Geoffrey C. Clayton and of Leuven, Belgium Louisiana State University and Harvard-Smithsonian Center Thomas R. Williams Baton Rouge, Louisiana for Astrophysics Houston, Texas Cambridge, Massachusetts Zhibin Dai Lee Anne M. Willson Yunnan Observatories Ulisse Munari Iowa State University Kunming City, Yunnan, China INAF/Astronomical Observatory Ames, Iowa of Padua Kosmas Gazeas Asiago, Italy University of Athens Athens, Greece The Council of the American Association of Variable Star Observers 2015–2016 Director Stella Kafka President Kristine Larsen Past President Jennifer L.