Multi-Color Photometry of Supergiants and Cepheids
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September 2020 BRAS Newsletter
A Neowise Comet 2020, photo by Ralf Rohner of Skypointer Photography Monthly Meeting September 14th 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: NASA Michoud Assembly Facility Director, Robert Champion What's In This Issue? President’s Message Secretary's Summary Business Meeting Minutes Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night Member’s Corner –My Quest For A Dark Place, by Chris Carlton Astro-Photos by BRAS Members Messages from the HRPO REMOTE DISCUSSION Solar Viewing Plus Night Mercurian Elongation Spooky Sensation Great Martian Opposition Observing Notes: Aquila – The Eagle 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 27 September 2020 President’s Message Welcome to September. You may have noticed that this newsletter is showing up a little bit later than usual, and it’s for good reason: release of the newsletter will now happen after the monthly business meeting so that we can have a chance to keep everybody up to date on the latest information. Sometimes, this will mean the newsletter shows up a couple of days late. But, the upshot is that you’ll now be able to see what we discussed at the recent business meeting and have time to digest it before our general meeting in case you want to give some feedback. Now that we’re on the new format, business meetings (and the oft neglected Light Pollution Committee Meeting), are going to start being open to all members of the club again by simply joining up in the respective chat rooms the Wednesday before the first Monday of the month—which I encourage people to do, especially if you have some ideas you want to see the club put into action. -
Referierte Publikationen
14 Publikationslisten Referierte Publikationen Abbott, T.M.C., M. Aguena, A. Alarcon, S. Allam, S. Allen, J. Granot, D. Green, I.A. Grenier, M.-H. Grondin, S. Guiriec, J. Annis, S. Avila, D. Bacon, K. Bechtol, A. Bermeo, G.M. E. Hays, D. Horan, G. Jóhannesson, D. Kocevski, M. Kova- Bernstein, E. Bertin, S. Bhargava, S. Bocquet, D. Brooks, D. cevic, M. Kuss, S. Larsson, L. Latronico, M. Lemoine-Gou- Brout, E. Buckley-Geer, D.L. Burke, A. Carnero Rosell, M. mard, J. Li, I. Liodakis, F. Longo, F. Loparco, M.N. Lovel- Carrasco Kind, J. Carretero, F.J. Castander, R. Cawthon, C. lette, P. Lubrano, S. Maldera, D. Malyshev, A. Manfreda, Chang, X. Chen, A. Choi, M. Costanzi, M. Crocce, L.N. da G. Martí-Devesa, M.N. Mazziotta, J.E. McEnery, I. Mereu, Costa, T.M. Davis, J. de Vicente, J. de Rose, S. Desai, H.T. M. Meyer, P.F. Michelson, W. Mitthumsiri, T. Mizuno, Diehl, J.P. Dietrich, S. Dodelson, P. Doel, A. Drlica-Wagner, M.E. Monzani, E. Moretti, A. Morselli, I.V. Moskalenko, K. Eckert, T.F. Eifl er, J. Elvin-Poole, J. Estrada, S. Everett, M. Negro, E. Nuss, N. Omodei, M. Orienti, E. Orlando, M. A.E. Evrard, A. Farahi, I. Ferrero, B. Flaugher, P. Fosalba, Palatiello, V.S. Paliya, D. Paneque, Z. Pei, M. Persic, M. J. Frieman, J. García-Bellido, M. Gatti, E. Gaztanaga, D.W. Pesce-Rollins, V. Petrosian, F. Piron, H. Poon, T.A. Porter, Gerdes, T. Giannantonio, P. Giles, S. Grandis, D. Gruen, G. Principe, J.L. -
Ioptron CEM40 Center-Balanced Equatorial Mount
iOptron®CEM40 Center-Balanced Equatorial Mount Instruction Manual Product CEM40 (#7400A series) and CEM40EC (#7400ECA series, as shown) Please read the included CEM40 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper operation will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while using a telescope. 2 Table of Contents Table of Contents ........................................................................................................................................ 3 1. CEM40 Introduction ............................................................................................................................... 5 2. CEM40 Overview ................................................................................................................................... 6 2.1. Parts List ......................................................................................................................................... -
A COMPREHENSIVE STUDY of SUPERNOVAE MODELING By
A COMPREHENSIVE STUDY OF SUPERNOVAE MODELING by Chengdong Li BS, University of Science and Technology of China, 2006 MS, University of Pittsburgh, 2007 Submitted to the Graduate Faculty of the Dietrich School of Arts and Sciences in partial fulfillment of the requirements for the degree of Doctor of Philosophy University of Pittsburgh 2013 UNIVERSITY OF PITTSBURGH PHYSICS AND ASTRONOMY DEPARTMENT This dissertation was presented by Chengdong Li It was defended on January 22nd 2013 and approved by John Hillier, Professor, Department of Physics and Astronomy Rupert Croft, Associate Professor, Department of Physics Steven Dytman, Professor, Department of Physics and Astronomy Michael Wood-Vasey, Assistant Professor, Department of Physics and Astronomy Andrew Zentner, Associate Professor, Department of Physics and Astronomy Dissertation Director: John Hillier, Professor, Department of Physics and Astronomy ii Copyright ⃝c by Chengdong Li 2013 iii A COMPREHENSIVE STUDY OF SUPERNOVAE MODELING Chengdong Li, PhD University of Pittsburgh, 2013 The evolution of massive stars, as well as their endpoints as supernovae (SNe), is important both in astrophysics and cosmology. While tremendous progress towards an understanding of SNe has been made, there are still many unanswered questions. The goal of this thesis is to study the evolution of massive stars, both before and after explosion. In the case of SNe, we synthesize supernova light curves and spectra by relaxing two assumptions made in previous investigations with the the radiative transfer code cmfgen, and explore the effects of these two assumptions. Previous studies with cmfgen assumed γ-rays from radioactive decay deposit all energy into heating. However, some of the energy excites and ionizes the medium. -
283 — 12 July 2016 Editor: Bo Reipurth ([email protected]) List of Contents
THE STAR FORMATION NEWSLETTER An electronic publication dedicated to early stellar/planetary evolution and molecular clouds No. 283 — 12 July 2016 Editor: Bo Reipurth ([email protected]) List of Contents The Star Formation Newsletter Interview ...................................... 3 Perspective .................................... 5 Editor: Bo Reipurth [email protected] Abstracts of Newly Accepted Papers ........... 9 Technical Editor: Eli Bressert Abstracts of Newly Accepted Major Reviews . 33 [email protected] Dissertation Abstracts ........................ 34 Technical Assistant: Hsi-Wei Yen New Jobs ..................................... 35 [email protected] Meetings ..................................... 37 Editorial Board Summary of Upcoming Meetings ............. 37 Joao Alves Alan Boss Jerome Bouvier Lee Hartmann Thomas Henning Cover Picture Paul Ho Jes Jorgensen The image, obtained with the Hubble Space Tele- Charles J. Lada scope, shows photoevaporating globules embedded Thijs Kouwenhoven in the Carina Nebula. Michael R. Meyer Image courtesy NASA, ESA, N. Smith (University Ralph Pudritz of California, Berkeley), and The Hubble Heritage Luis Felipe Rodr´ıguez Team (STScI/AURA) Ewine van Dishoeck Hans Zinnecker The Star Formation Newsletter is a vehicle for fast distribution of information of interest for as- tronomers working on star and planet formation Submitting your abstracts and molecular clouds. You can submit material for the following sections: Abstracts of recently Latex macros for submitting abstracts -
On the Binary Orbit of Henry Draper One (HD 1)
Received <day> <Month>, <year>; Revised <day> <Month>, <year>; Accepted <day> <Month>, <year> DOI: xxx/xxxx ORIGINAL PAPER On the binary orbit of Henry Draper one (HD 1) Klaus G. Strassmeier* | Michael Weber* 1Leibniz-Institute for Astrophysics Potsdam (AIP), An der Sternwarte 16, D-14482 Abstract Potsdam, Germany We present our final orbit for the late-type spectroscopic binary HD 1. Employed Correspondence are 553 spectra from 13 years of observations with our robotic STELLA facility *Email: [email protected], Email: and its high-resolution echelle spectrograph SES. Its long-term radial-velocity sta- [email protected] bility is ù50 m s*1. A single radial velocity of HD 1 reached a rms residual of 63 m s*1, close to the expected precision. Spectral lines of HD 1 are rotationally broadened with v sin i of 9.1,0.1 km s*1. The overall spectrum appears single-lined and yielded an orbit with an eccentricity of 0.5056,0.0005 and a semi-amplitude of 4.44 km s*1. We constrain and refine the orbital period based on the SES data alone to 2318.70,0.32 d, compared to 2317.8,1.1 d when including the older data set published by DAO and Cambridge/Coravel. Owing to the higher precision of the SES data, we base the orbit calculation only on the STELLA/SES velocities in order not to degrade its solution. We redetermine astrophysical parameters for HD 1 from spectrum synthesis and, together with the new Gaia DR-2 parallax, suggest a higher luminosity than published previously. -
Aerodynamic Phenomena in Stellar Atmospheres, a Bibliography
- PB 151389 knical rlote 91c. 30 Moulder laboratories AERODYNAMIC PHENOMENA STELLAR ATMOSPHERES -A BIBLIOGRAPHY U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS ^M THE NATIONAL BUREAU OF STANDARDS Functions and Activities The functions of the National Bureau of Standards are set forth in the Act of Congress, March 3, 1901, as amended by Congress in Public Law 619, 1950. These include the development and maintenance of the national standards of measurement and the provision of means and methods for making measurements consistent with these standards; the determination of physical constants and properties of materials; the development of methods and instruments for testing materials, devices, and structures; advisory services to government agencies on scientific and technical problems; in- vention and development of devices to serve special needs of the Government; and the development of standard practices, codes, and specifications. The work includes basic and applied research, development, engineering, instrumentation, testing, evaluation, calibration services, and various consultation and information services. Research projects are also performed for other government agencies when the work relates to and supplements the basic program of the Bureau or when the Bureau's unique competence is required. The scope of activities is suggested by the listing of divisions and sections on the inside of the back cover. Publications The results of the Bureau's work take the form of either actual equipment and devices or pub- lished papers. -
Astrophysics
Publications of the Astronomical Institute rais-mf—ii«o of the Czechoslovak Academy of Sciences Publication No. 70 EUROPEAN REGIONAL ASTRONOMY MEETING OF THE IA U Praha, Czechoslovakia August 24-29, 1987 ASTROPHYSICS Edited by PETR HARMANEC Proceedings, Vol. 1987 Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences Publication No. 70 EUROPEAN REGIONAL ASTRONOMY MEETING OF THE I A U 10 Praha, Czechoslovakia August 24-29, 1987 ASTROPHYSICS Edited by PETR HARMANEC Proceedings, Vol. 5 1 987 CHIEF EDITOR OF THE PROCEEDINGS: LUBOS PEREK Astronomical Institute of the Czechoslovak Academy of Sciences 251 65 Ondrejov, Czechoslovakia TABLE OF CONTENTS Preface HI Invited discourse 3.-C. Pecker: Fran Tycho Brahe to Prague 1987: The Ever Changing Universe 3 lorlishdp on rapid variability of single, binary and Multiple stars A. Baglln: Time Scales and Physical Processes Involved (Review Paper) 13 Part 1 : Early-type stars P. Koubsfty: Evidence of Rapid Variability in Early-Type Stars (Review Paper) 25 NSV. Filtertdn, D.B. Gies, C.T. Bolton: The Incidence cf Absorption Line Profile Variability Among 33 the 0 Stars (Contributed Paper) R.K. Prinja, I.D. Howarth: Variability In the Stellar Wind of 68 Cygni - Not "Shells" or "Puffs", 39 but Streams (Contributed Paper) H. Hubert, B. Dagostlnoz, A.M. Hubert, M. Floquet: Short-Time Scale Variability In Some Be Stars 45 (Contributed Paper) G. talker, S. Yang, C. McDowall, G. Fahlman: Analysis of Nonradial Oscillations of Rapidly Rotating 49 Delta Scuti Stars (Contributed Paper) C. Sterken: The Variability of the Runaway Star S3 Arietis (Contributed Paper) S3 C. Blanco, A. -
Uranometría Argentina Bicentenario
URANOMETRÍA ARGENTINA BICENTENARIO Reedición electrónica ampliada, ilustrada y actualizada de la URANOMETRÍA ARGENTINA Brillantez y posición de las estrellas fijas, hasta la séptima magnitud, comprendidas dentro de cien grados del polo austral. Resultados del Observatorio Nacional Argentino, Volumen I. Publicados por el observatorio 1879. Con Atlas (1877) 1 Observatorio Nacional Argentino Dirección: Benjamin Apthorp Gould Observadores: John M. Thome - William M. Davis - Miles Rock - Clarence L. Hathaway Walter G. Davis - Frank Hagar Bigelow Mapas del Atlas dibujados por: Albert K. Mansfield Tomado de Paolantonio S. y Minniti E. (2001) Uranometría Argentina 2001, Historia del Observatorio Nacional Argentino. SECyT-OA Universidad Nacional de Córdoba, Córdoba. Santiago Paolantonio 2010 La importancia de la Uranometría1 Argentina descansa en las sólidas bases científicas sobre la cual fue realizada. Esta obra, cuidada en los más pequeños detalles, se debe sin dudas a la genialidad del entonces director del Observatorio Nacional Argentino, Dr. Benjamin A. Gould. Pero nada de esto se habría hecho realidad sin la gran habilidad, el esfuerzo y la dedicación brindada por los cuatro primeros ayudantes del Observatorio, John M. Thome, William M. Davis, Miles Rock y Clarence L. Hathaway, así como de Walter G. Davis y Frank Hagar Bigelow que se integraron más tarde a la institución. Entre éstos, J. M. Thome, merece un lugar destacado por la esmerada revisión, control de las posiciones y determinaciones de brillos, tal como el mismo Director lo reconoce en el prólogo de la publicación. Por otro lado, Albert K. Mansfield tuvo un papel clave en la difícil confección de los mapas del Atlas. La Uranometría Argentina sobresale entre los trabajos realizados hasta ese momento, por múltiples razones: Por la profundidad en magnitud, ya que llega por vez primera en este tipo de empresa a la séptima. -
February 2008 Volume 33 Number 1
login_february08_covers.qxp:login covers 1/22/08 1:38 PM Page 1 FEBRUARY 2008 VOLUME 33 NUMBER 1 OPINION Musings 2 RIK FARROW SYSADMIN Fear and Loathing in the Routing System 5 JOE ABLEY THE USENIX MAGAZINE From x=1 to (setf x 1): What Does Configuration Management Mean? 12 ALVA COUCH http:BL: Taking DNSBL Beyond SMTP 19 ERIC LANGHEINRICH Centralized Package Management Using Stork 25 JUSTIN SAMUEL, JEREMY PLICHTA, AND JUSTIN CAPPOS Managing Distributed Applications with Plush 32 JEANNIE ALBRECHT, RYAN BRAUD, DARREN DAO, NIKOLAY TOPILSKI, CHRISTOPHER TUTTLE, ALEX C. SNOEREN, AND AMIN VAHDAT An Introduction to Logical Domains 39 OCTAVE ORGERON PROGRAMMING Insecurities in Designing XML Signatures 48 ADITYA K SOOD COLUMNS Practical Perl Tools: Why I Live at the P.O. 54 DAVID N. BLANK-EDELMAN Pete’s All Things Sun (PATS): The Future of Sun 61 PETER BAER GALVIN iVoyeur: Permission to Parse 65 DAVID JOSEPHSEN /dev/random 72 ROBERT G. FERRELL Toward Attributes 74 NICK STOUGHTON BOOK REVIEWS Book Reviews 78 ÆLEEN FRISCH, BRAD KNOWLES, AND SAM STOVER USENIX NOTES 2008 USENIX Nominating Committee Report 82 MICHAEL B. JONES AND DAN GEER Summary of USENIX Board of Directors Meetings and Actions 83 ELLIE YOUNG New on the USENIX Web Site: The Multimedia Page 83 ANNE DICKISON CONFERENCE LISA ’07: 21st Large Installation SUMMARIES System Administration Conference 84 The Advanced Computing Sytems Association login_february08_covers.qxp:login covers 1/17/08 12:11 PM Page 2 Upcoming Events 2008 ACM INTERNATIONAL CONFERENCE ON 2ND INTERNATIONAL CONFERENCE ON -
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. -
Brightest Stars : Discovering the Universe Through the Sky's Most Brilliant Stars / Fred Schaaf
ffirs.qxd 3/5/08 6:26 AM Page i THE BRIGHTEST STARS DISCOVERING THE UNIVERSE THROUGH THE SKY’S MOST BRILLIANT STARS Fred Schaaf John Wiley & Sons, Inc. flast.qxd 3/5/08 6:28 AM Page vi ffirs.qxd 3/5/08 6:26 AM Page i THE BRIGHTEST STARS DISCOVERING THE UNIVERSE THROUGH THE SKY’S MOST BRILLIANT STARS Fred Schaaf John Wiley & Sons, Inc. ffirs.qxd 3/5/08 6:26 AM Page ii This book is dedicated to my wife, Mamie, who has been the Sirius of my life. This book is printed on acid-free paper. Copyright © 2008 by Fred Schaaf. All rights reserved Published by John Wiley & Sons, Inc., Hoboken, New Jersey Published simultaneously in Canada Illustration credits appear on page 272. Design and composition by Navta Associates, Inc. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600, or on the web at www.copy- right.com. Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions.