November 1998 Table of Contents
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
Pos(MULTIF2017)001
Multifrequency Astrophysics (A pillar of an interdisciplinary approach for the knowledge of the physics of our Universe) ∗† Franco Giovannelli PoS(MULTIF2017)001 INAF - Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere, 100, 00133 Roma, Italy E-mail: [email protected] Lola Sabau-Graziati INTA- Dpt. Cargas Utiles y Ciencias del Espacio, C/ra de Ajalvir, Km 4 - E28850 Torrejón de Ardoz, Madrid, Spain E-mail: [email protected] We will discuss the importance of the "Multifrequency Astrophysics" as a pillar of an interdis- ciplinary approach for the knowledge of the physics of our Universe. Indeed, as largely demon- strated in the last decades, only with the multifrequency observations of cosmic sources it is possible to get near the whole behaviour of a source and then to approach the physics governing the phenomena that originate such a behaviour. In spite of this, a multidisciplinary approach in the study of each kind of phenomenon occurring in each kind of cosmic source is even more pow- erful than a simple "astrophysical approach". A clear example of a multidisciplinary approach is that of "The Bridge between the Big Bang and Biology". This bridge can be described by using the competences of astrophysicists, planetary physicists, atmospheric physicists, geophysicists, volcanologists, biophysicists, biochemists, and astrobiophysicists. The unification of such com- petences can provide the intellectual framework that will better enable an understanding of the physics governing the formation and structure of cosmic objects, apparently uncorrelated with one another, that on the contrary constitute the steps necessary for life (e.g. Giovannelli, 2001). -
Symposium on Telescope Science
Proceedings for the 26th Annual Conference of the Society for Astronomical Sciences Symposium on Telescope Science Editors: Brian D. Warner Jerry Foote David A. Kenyon Dale Mais May 22-24, 2007 Northwoods Resort, Big Bear Lake, CA Reprints of Papers Distribution of reprints of papers by any author of a given paper, either before or after the publication of the proceedings is allowed under the following guidelines. 1. The copyright remains with the author(s). 2. Under no circumstances may anyone other than the author(s) of a paper distribute a reprint without the express written permission of all author(s) of the paper. 3. Limited excerpts may be used in a review of the reprint as long as the inclusion of the excerpts is NOT used to make or imply an endorsement by the Society for Astronomical Sciences of any product or service. Notice The preceding “Reprint of Papers” supersedes the one that appeared in the original print version Disclaimer The acceptance of a paper for the SAS proceedings can not be used to imply or infer an endorsement by the Society for Astronomical Sciences of any product, service, or method mentioned in the paper. Published by the Society for Astronomical Sciences, Inc. First printed: May 2007 ISBN: 0-9714693-6-9 Table of Contents Table of Contents PREFACE 7 CONFERENCE SPONSORS 9 Submitted Papers THE OLIN EGGEN PROJECT ARNE HENDEN 13 AMATEUR AND PROFESSIONAL ASTRONOMER COLLABORATION EXOPLANET RESEARCH PROGRAMS AND TECHNIQUES RON BISSINGER 17 EXOPLANET OBSERVING TIPS BRUCE L. GARY 23 STUDY OF CEPHEID VARIABLES AS A JOINT SPECTROSCOPY PROJECT THOMAS C. -
Pulsating Components in Binary and Multiple Stellar Systems---A
Research in Astron. & Astrophys. Vol.15 (2015) No.?, 000–000 (Last modified: — December 6, 2014; 10:26 ) Research in Astronomy and Astrophysics Pulsating Components in Binary and Multiple Stellar Systems — A Catalog of Oscillating Binaries ∗ A.-Y. Zhou National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; [email protected] Abstract We present an up-to-date catalog of pulsating binaries, i.e. the binary and multiple stellar systems containing pulsating components, along with a statistics on them. Compared to the earlier compilation by Soydugan et al.(2006a) of 25 δ Scuti-type ‘oscillating Algol-type eclipsing binaries’ (oEA), the recent col- lection of 74 oEA by Liakos et al.(2012), and the collection of Cepheids in binaries by Szabados (2003a), the numbers and types of pulsating variables in binaries are now extended. The total numbers of pulsating binary/multiple stellar systems have increased to be 515 as of 2014 October 26, among which 262+ are oscillating eclipsing binaries and the oEA containing δ Scuti componentsare updated to be 96. The catalog is intended to be a collection of various pulsating binary stars across the Hertzsprung-Russell diagram. We reviewed the open questions, advances and prospects connecting pulsation/oscillation and binarity. The observational implication of binary systems with pulsating components, to stellar evolution theories is also addressed. In addition, we have searched the Simbad database for candidate pulsating binaries. As a result, 322 candidates were extracted. Furthermore, a brief statistics on Algol-type eclipsing binaries (EA) based on the existing catalogs is given. We got 5315 EA, of which there are 904 EA with spectral types A and F. -
Binocular Challenges
This page intentionally left blank Cosmic Challenge Listing more than 500 sky targets, both near and far, in 187 challenges, this observing guide will test novice astronomers and advanced veterans alike. Its unique mix of Solar System and deep-sky targets will have observers hunting for the Apollo lunar landing sites, searching for satellites orbiting the outermost planets, and exploring hundreds of star clusters, nebulae, distant galaxies, and quasars. Each target object is accompanied by a rating indicating how difficult the object is to find, an in-depth visual description, an illustration showing how the object realistically looks, and a detailed finder chart to help you find each challenge quickly and effectively. The guide introduces objects often overlooked in other observing guides and features targets visible in a variety of conditions, from the inner city to the dark countryside. Challenges are provided for viewing by the naked eye, through binoculars, to the largest backyard telescopes. Philip S. Harrington is the author of eight previous books for the amateur astronomer, including Touring the Universe through Binoculars, Star Ware, and Star Watch. He is also a contributing editor for Astronomy magazine, where he has authored the magazine’s monthly “Binocular Universe” column and “Phil Harrington’s Challenge Objects,” a quarterly online column on Astronomy.com. He is an Adjunct Professor at Dowling College and Suffolk County Community College, New York, where he teaches courses in stellar and planetary astronomy. Cosmic Challenge The Ultimate Observing List for Amateurs PHILIP S. HARRINGTON CAMBRIDGE UNIVERSITY PRESS Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, Sao˜ Paulo, Delhi, Dubai, Tokyo, Mexico City Cambridge University Press The Edinburgh Building, Cambridge CB2 8RU, UK Published in the United States of America by Cambridge University Press, New York www.cambridge.org Information on this title: www.cambridge.org/9780521899369 C P. -
November 2020 BRAS Newsletter
A Mars efter Lowell's Glober ca. 1905-1909”, from Percival Lowell’s maps; National Maritime Museum, Greenwich, London (see Page 6) Monthly Meeting November 9th at 7:00 PM, via Jitsi (Monthly meetings are on 2nd Mondays at Highland Road Park Observatory, temporarily during quarantine at meet.jit.si/BRASMeets). GUEST SPEAKER: Chuck Allen from the Astronomical League will speak about The Cosmic Distance Ladder, which explores the historical advancement of distance determinations in astronomy. What's In This Issue? President’s Message Member Meeting Minutes Business Meeting Minutes Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night Member’s Corner – John Nagle ALPO 2020 Conference Astro-Photos by BRAS Members - MARS Messages from the HRPO REMOTE DISCUSSION Solar Viewing Edge of Night Natural Sky Conference Recent Entries in the BRAS Forum Observing Notes: Pisces – The Fishes Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society BRAS YouTube Channel Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 24 November 2020 President’s Message Welcome to the home stretch for 2020. The nights are starting earlier and earlier as the weather becomes more and more comfortable and all of our old favorites of the fall and winter skies really start finding their places right where they belong. October was a busy month for us, with several big functions at the Observatory, including two oppositions and two more all night celebrations. By comparison, November is looking fairly calm, the big focus there is going to be our third annual Natural Sky Conference on the 13th, which I’m encouraging people who care about the state of light pollution in our city and the surrounding area to get involved in. -
News from the Society for Astronomical Sciences
News from the Society for Astronomical Sciences January, 2011 30th Anniversary of the Call for Papers 2011 Keynote Speaker: Society for Astronomical Papers are now being accepted for the Dr. Petrus Jenniskens Sciences SAS 2011 Symposium on Telescope Science. Topics on the full range of "The impact and recovery The 2011 Symposium on Telescope th small-telescope science are wel- of 2008 TC3" Science will mark the 30 anniversary comed: pro-am collaboration, science of the Society for Astronomical Sci- education, evaluation of recent profes- On October 7, 2008, a small 3-4 m ences. The enthusiasm of the partici- sional results on relevant targets (e.g. sized asteroid was discovered to be on pants for small-telescope science has small solar system bodies, planets, a collision course with Earth, the first not changed over those three dec- variable stars), and special uses of time an asteroid was seen coming in. ades. The growth in the size and par- astronomical data. Now called "2008 TC3", astronomers ticipation by both amateur and profes- studied the asteroid's lightcurve and sional astronomers bear witness to the Please send the abstract of your pro- reflection properties. Twenty hours important roles that the Symposium posed paper to the Program Commit- later, it crashed in the Nubian desert of plays: tee at [email protected]. Northern Sudan. When satellites saw it explode at an unusually high altitude • An opportunity for non-professional Deadlines are: of 37 km, many thought that was the researchers to present their projects Abstract submission: March 12, 2011 end of the story. -
Extrasolar Planets and Their Host Stars
Kaspar von Braun & Tabetha S. Boyajian Extrasolar Planets and Their Host Stars July 25, 2017 arXiv:1707.07405v1 [astro-ph.EP] 24 Jul 2017 Springer Preface In astronomy or indeed any collaborative environment, it pays to figure out with whom one can work well. From existing projects or simply conversations, research ideas appear, are developed, take shape, sometimes take a detour into some un- expected directions, often need to be refocused, are sometimes divided up and/or distributed among collaborators, and are (hopefully) published. After a number of these cycles repeat, something bigger may be born, all of which one then tries to simultaneously fit into one’s head for what feels like a challenging amount of time. That was certainly the case a long time ago when writing a PhD dissertation. Since then, there have been postdoctoral fellowships and appointments, permanent and adjunct positions, and former, current, and future collaborators. And yet, con- versations spawn research ideas, which take many different turns and may divide up into a multitude of approaches or related or perhaps unrelated subjects. Again, one had better figure out with whom one likes to work. And again, in the process of writing this Brief, one needs create something bigger by focusing the relevant pieces of work into one (hopefully) coherent manuscript. It is an honor, a privi- lege, an amazing experience, and simply a lot of fun to be and have been working with all the people who have had an influence on our work and thereby on this book. To quote the late and great Jim Croce: ”If you dig it, do it. -
Physics of the Moon
NASA TECHNICAL NOTE -cNASA TN D-2944 e. / PHYSICS OF THE MOON SELECTED TOPICS CONCERNING LUNAR EXPLORATION Edited by George C. ‘Bucker and Henry E. Siern George C. Marsball Space Flight Center Hzmtsville, A Za: NATIONAL AERONAUTICSAND SPACEADMINISTRATION - WASHINGTON;D. C. TECH LIBRARY KAFB. NM llL5475b NASA TN D-2944 PHYSICS OF THE MOON SELECTED TOPICS CONCERNING LUNAR EXPLORATION Edited by George C. Bucher and Henry E. Stern George C. Marshall Space Flight Center Huntsville, Ala. NATIONAL AERONAUTICS AND SPACE ADMINISTRATION For sole by the Clearinghouse for Federal Scientific and Technical information Springfield, Virginia 22151 - Price 56.00 I - TABLE OF CONTENTS Page SUMMA=. 1 INTRODUCTION. i SECTION I. CHARACTERISTICS OF THE MOON. i . 3 Chapter 1. The Moon’s .History, by Ernst Stuhlinger. 5 Chapter 2. Physical Characteristics of the Lunar Surface, by John Bensko . 39 Chapter 3. The’ Lunar Atmosphere, by Spencer G. Frary . , 55 Chapter 4. Energetic Radiation Environment of the Moon, by Martin 0. Burrell . 65 Chapter 5. The Lunar Thermal Environment , . 9i The Thermal Model of the Moon, by Gerhard B. Heller . 91 p Thermal Properties of the Moon as a Conductor of Heat,byBillyP. Jones.. 121 Infrared Methods of Measuring the Moon’s Temperature, by Charles D. Cochran. 135 SECTION II. EXPLORATION OF THE MOON . .I59 Chapter I. A Lunar Scientific Mission, by Daniel Payne Hale. 161 Chapter 2. Some Suggested Landing Sites for Exploration of the Moon, by Daniel Payne Hale. 177 Chapter 3. Environmental Control for Early Lunar Missions, by ‘Herman P. Gierow and James A. Downey, III . , . .2i I Chapter 4. -
The COLOUR of CREATION Observing and Astrophotography Targets “At a Glance” Guide
The COLOUR of CREATION observing and astrophotography targets “at a glance” guide. (Naked eye, binoculars, small and “monster” scopes) Dear fellow amateur astronomer. Please note - this is a work in progress – compiled from several sources - and undoubtedly WILL contain inaccuracies. It would therefor be HIGHLY appreciated if readers would be so kind as to forward ANY corrections and/ or additions (as the document is still obviously incomplete) to: [email protected]. The document will be updated/ revised/ expanded* on a regular basis, replacing the existing document on the ASSA Pretoria website, as well as on the website: coloursofcreation.co.za . This is by no means intended to be a complete nor an exhaustive listing, but rather an “at a glance guide” (2nd column), that will hopefully assist in choosing or eliminating certain objects in a specific constellation for further research, to determine suitability for observation or astrophotography. There is NO copy right - download at will. Warm regards. JohanM. *Edition 1: June 2016 (“Pre-Karoo Star Party version”). “To me, one of the wonders and lures of astronomy is observing a galaxy… realizing you are detecting ancient photons, emitted by billions of stars, reduced to a magnitude below naked eye detection…lying at a distance beyond comprehension...” ASSA 100. (Auke Slotegraaf). Messier objects. Apparent size: degrees, arc minutes, arc seconds. Interesting info. AKA’s. Emphasis, correction. Coordinates, location. Stars, star groups, etc. Variable stars. Double stars. (Only a small number included. “Colourful Ds. descriptions” taken from the book by Sissy Haas). Carbon star. C Asterisma. (Including many “Streicher” objects, taken from Asterism. -
Chapter 1 Foundations, Federations, and Finder Charts
Cambridge University Press 0521820472 - Observing Variable Stars, Novae, and Supernovae Gerald North Excerpt More information Chapter 1 Foundations, federations, and finder charts In this book we will examine the various reasons why some celestial bodies vary their luminosities, in addition to tackling the practicalities of observing them and following their brightness changes. The names of objects and phenom- ena such as eclipsing variable stars, pulsating variable stars, symbiotic stars, eruptive variable stars, cataclysmic variable stars, novae, supernovae, hyper- novae, X-ray bursters, ␥-ray bursters, Active Galactic Nuclei, Seyfert galaxies, BL Lacertae objects, quasars, and more are our main fare. I propose the generic term astrovariables for them. You might not have access to expensive equipment and only have a little of your time and the use of your eyes which you can spare. Even so, you can still make a contribution. If you doubt this, take a look at Figure 1.1 which shows the constellation of Orion. Of the main stars, the upper-left one is the red giant Betelgeuse. It is a variable and, using the techniques described later in this book, its variations of brightness can be followed by making estimates with no equipment other than the unaided eye. There are other examples. Still, if you have or can obtain some cheap equipment then all the better because this widens the scope enormously. With very limited resources you will have a wide enough choice of objects to follow to potentially fill many lifetimes of study! If you can increase your equipment budget to a few thousand dollars then you can emulate professional astronomers and produce cutting-edge research work. -
102, December 1999
British Astronomical Association VARIABLE STAR SECTION CIRCULAR No 102, December 1999 Contents Light Curves for RU Peg and OP Her ............................................................. 1 From the Director ............................................................................................. 2 Observing UU Aur ........................................................................................... 4 Request for help with VSSC Index .................................................................. 4 V844 Her .......................................................................................................... 5 Why Observe Eclipsing Variables? .................................................................. 6 Summary of the VSS Officers Meeting ........................................................... 8 Known Variables in the Hipparcos Data ........................................................ 10 A New Observing Project to Detect Eclipsing Dwarf Novae ........................ 11 Variable Stars Down-Under (continued) ........................................................ 15 PEP from the Backyard Observatory at Ryde (part 2) ................................... 20 Chart for TASV 0327+44 ............................................................................... 24 WWW Page Updates ...................................................................................... 25 Pro-Am Exchanges Report Number 17 ......................................................... 26 Observer Lists for Cover Light Curves ......................................................... -
Introducing the Variable Star Astronomy Constellations
Chapter 5: Introducing the Variable Star Astronomy Constellations Introduction Early observers organized stars into easily recognizable patterns that resembled the objects, animals, and people important to their survival and religions. We now call these patterns constellations. From our perspective here on Earth, it appears that the stars in any given constellation are connected in some way, that they all occupy the same part of space, and are all the same distance from the Earth. However, in reality, most stars within constellations are up to several light- years away from each Petroglyph in 9 Mile Canyon, Utah depicting other. An example is the Big Dipper. Coyote Scattering the Stars in the Sky Alkaid, the star at the end of the handle, is 100 light-years away from Earth. The next handle star is actually two stars that appear very close together. The brighter star, Mizar, is 78 light-years away from Earth, and Alcor is 81 light- years away. Mizar and Alcor are 3 light-years apart in the sky, a distance of 27 trillion kilometers, and Alkaid and Mizar are 22 light-years apart, a distance of 198 trillion kilometers! An exception is the Pleiades, the “Seven Sisters” asterism. The Pleiades is an open cluster, a group of stars born together in the same stellar nursery and now slowly drifting apart. The constellation names and boundaries we recognize today were officially established in 1930 by the International Astronomical Union (IAU). The entire sky is now partitioned into 88 irregularly-shaped pieces, and one constellation is assigned to each piece. The history of constellations, of who named them, and when, is full of myth, rumor, and ambiguity.