INFORMATION CIRCULAR No. 179 (FEBRUARY 2013)
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Are the Orbital Poles of Binary Stars in the Solar Neighbourhood Anisotropically Distributed?
A&A 574, A6 (2015) Astronomy DOI: 10.1051/0004-6361/201323056 & c ESO 2015 Astrophysics Are the orbital poles of binary stars in the solar neighbourhood anisotropically distributed? J.-L. Agati1,D.Bonneau2, A. Jorissen3,E.Soulié4,S.Udry5,P.Verhas6, and J. Dommanget†,7 1 13 rue Beyle Stendhal, 38000 Grenoble, France 2 Laboratoire Lagrange, UMR 7293, Univ. Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d’Azur, 06300 Nice, France e-mail: [email protected] 3 Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, CP 226, Boulevard du Triomphe, 1050 Brussels, Belgium 4 CEA/Saclay, DSM, 91191 Gif-sur-Yvette Cedex, France 5 Observatoire de Genève, Chemin des Maillettes, 1290 Sauverny, Suisse 6 251 vieille rue du Moulin, 1180 Brussels, Belgium 7 Observatoire Royal de Belgique, Avenue Circulaire 3, 1180 Bruxelles, Belgique Received 15 November 2013 / Accepted 30 October 2014 ABSTRACT We test whether or not the orbital poles of the systems in the solar neighbourhood are isotropically distributed on the celestial sphere. The problem is plagued by the ambiguity on the position of the ascending node. Of the 95 systems closer than 18 pc from the Sun with an orbit in the 6th Catalogue of Orbits of Visual Binaries, the pole ambiguity could be resolved for 51 systems using radial velocity collected in the literature and CORAVEL database or acquired with the HERMES/Mercator spectrograph. For several systems, we can correct the erroneous nodes in the 6th Catalogue of Orbits and obtain new combined spectroscopic/astrometric orbits for seven systems [WDS 01083+5455Aa,Ab; 01418+4237AB; 02278+0426AB (SB2); 09006+4147AB (SB2); 16413+3136AB; 17121+4540AB; 18070+3034AB]. -
Are the Orbital Poles of Binary Stars in the Solar Neighbourhood
Astronomy & Astrophysics manuscript no. agati c ESO 2018 July 10, 2018 Are the orbital poles of binary stars in the solar neighbourhood anisotropically distributed? J-L. Agati1, D. Bonneau2, A. Jorissen3, E. Soulié4, S. Udry5, P. Verhas6, and J. Dommanget ⋆7 † 1 13, rue Beyle Stendhal, 38000 Grenoble, France 2 Laboratoire Lagrange, UMR 7293, Univ. Nice Sophia-Antipolis, CNRS, Observatoire de la Côte d’Azur, 06300 Nice, France e-mail: [email protected] 3 Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles, CP. 226, Boulevard du Triomphe, 1050 Brussels, Belgium 4 CEA/Saclay, DSM, 91191 Gif-sur-Yvette Cedex 5 Observatoire de Genève, Chemin des Maillettes, CH-1290 Sauverny, Suisse 6 251 Vieille rue du Moulin, 1180 Brussels, Belgium 7 Observatoire Royal de Belgique, Avenue Circulaire 3, B-1180 Bruxelles, Belgique Received 15/11/2013; accepted 30/10/2014 ABSTRACT We test whether or not the orbital poles of the systems in the solar neighbourhood are isotropically distributed on the celestial sphere. The problem is plagued by the ambiguity on the position of the ascending node. Of the 95 systems closer than 18 pc from the Sun with an orbit in the 6th Catalogue of Orbits of Visual Binaries, the pole ambiguity could be resolved for 51 systems using radial velocity collected in the literature and CORAVEL database or acquired with the HER- MES/Mercator spectrograph. For several systems, we can correct the erroneous nodes in the 6th Catalogue of Orbits and obtain new combined spectroscopic/astrometric orbits for seven systems [WDS 01083+5455Aa,Ab; 01418+4237AB; 02278+0426AB (SB2); 09006+4147AB (SB2); 16413+3136AB; 17121+4540AB; 18070+3034AB]. -
Macrocosmo Nº33
HA MAIS DE DOIS ANOS DIFUNDINDO A ASTRONOMIA EM LÍNGUA PORTUGUESA K Y . v HE iniacroCOsmo.com SN 1808-0731 Ano III - Edição n° 33 - Agosto de 2006 * t i •■•'• bSÈlÈWW-'^Sif J fé . ’ ' w s » ws» ■ ' v> í- < • , -N V Í ’\ * ' "fc i 1 7 í l ! - 4 'T\ i V ■ }'- ■t i' ' % r ! ■ 7 ji; ■ 'Í t, ■ ,T $ -f . 3 j i A 'A ! : 1 l 4/ í o dia que o ceu explodiu! t \ Constelação de Andrômeda - Parte II Desnudando a princesa acorrentada £ Dicas Digitais: Softwares e afins, ATM, cursos online e publicações eletrônicas revista macroCOSMO .com Ano III - Edição n° 33 - Agosto de I2006 Editorial Além da órbita de Marte está o cinturão de asteróides, uma região povoada com Redação o material que restou da formação do Sistema Solar. Longe de serem chamados como simples pedras espaciais, os asteróides são objetos rochosos e/ou metálicos, [email protected] sem atmosfera, que estão em órbita do Sol, mas são pequenos demais para serem considerados como planetas. Até agora já foram descobertos mais de 70 Diretor Editor Chefe mil asteróides, a maior parte situados no cinturão de asteróides entre as órbitas Hemerson Brandão de Marte e Júpiter. [email protected] Além desse cinturão podemos encontrar pequenos grupos de asteróides isolados chamados de Troianos que compartilham a mesma órbita de Júpiter. Existem Editora Científica também aqueles que possuem órbitas livres, como é o caso de Hidalgo, Apolo e Walkiria Schulz Ícaro. [email protected] Quando um desses asteróides cruza a nossa órbita temos as crateras de impacto. A maior cratera visível de nosso planeta é a Meteor Crater, com cerca de 1 km de Diagramadores diâmetro e 600 metros de profundidade. -
Circumstellar Matter
INTERNATIONAL ASTRONOMICAL UNION SYMPOSIUM No. 122 CIRCUMSTELLAR MATTER Edited by I. APPENZELLER and C. JORDAN IqJAlb I INTERNATIONAL ASTRONOMICAL UNION D. REIDEL PUBLISHING COMPANY Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.180, on 06 Oct 2021 at 17:06:51, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900157420 CIRCUMSTELLAR MATTER Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.180, on 06 Oct 2021 at 17:06:51, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900157420 INTERNATIONAL ASTRONOMICAL UNION UNION ASTRONOMIQUE INTERNATIONALE CIRCUMSTELLAR MATTER PROCEEDINGS OF THE 122ND SYMPOSIUM OF THE INTERNATIONAL ASTRONOMICAL UNION HELD IN HEIDELBERG, F.R.G., JUNE 23-27, 1986 EDITED BY I. APPENZELLER Landessternwarte Heidelberg-Königstuhl, RR. G. C. JORDAN Department of Theoretical Physics, University of Oxford, U.K. D. REIDEL PUBLISHING COMPANY AMEMBEROFTHEKLUWER ACADEMIC PUBLISHERS GROUP DORDRECHT / BOSTON / LANCASTER / TOKYO Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.180, on 06 Oct 2021 at 17:06:51, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900157420 Library of Congress Cataloging in Publication Data International Astronomical Union. Symposium (122nd: 1986: Heidelberg, Germany) Circumstellar matter. At head of title: International Astronomical Union = Union astronomique interna- tionale. Includes indexes. Circumstellar Matter—Congresses. 2. Stars—Atmospheres—Congresses. 3. Interstellar matter—Congresses. I. Appenzeller, I. (Immo), 1940- II. -
Candidate Milky Way Satellites in the Galactic Halo
A&A 477, 139–145 (2008) Astronomy DOI: 10.1051/0004-6361:20078392 & c ESO 2007 Astrophysics Candidate Milky Way satellites in the Galactic halo C. Liu1,2,J.Hu1,H.Newberg3,andY.Zhao1 1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, PR China e-mail: [email protected] 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China 3 Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA Received 1 August 2007 / Accepted 28 September 2007 ABSTRACT Aims. Sloan Digital Sky Survey (SDSS) DR5 photometric data with 120◦ <α<270◦,25◦ <δ<70◦ were searched for new Milky Way companions or substructures in the Galactic halo. Methods. Five candidates are identified as overdense faint stellar sources that have color-magnitude diagrams similar to those of known globular clusters, or dwarf spheroidal galaxies. The distance to each candidate is estimated by fitting suitable stellar isochrones to the color-magnitude diagrams. Geometric properties and absolute magnitudes are roughly measured and used to determine whether the candidates are likely dwarf spheroidal galaxies, stellar clusters, or tidal debris. Results. SDSSJ1000+5730 and SDSSJ1329+2841 are probably faint dwarf galaxy candidates while SDSSJ0814+5105, SDSSJ0821+5608, and SDSSJ1058+2843 are very likely extremely faint globular clusters. Conclusions. Follow-up study is needed to confirm these candidates. Key words. Galaxy: structure – Galaxy: halo – galaxies: dwarf – Local Group 1. Introduction globular clusters: Willman 1 (Willman et al. 2005b) and Segue 1 (Belokurov et al. 2007). The discovery of tidal streams in the Milky Way from the accre- It is impossible to see these objects in SDSS images since tion of smaller galaxies supports hierarchical merging cosmogo- they are resolved into field stars. -
Major Qualifying Project
The Search for Exoplanets A Major Qualifying Project Submitted by: Christian J. Iamartino To the faculty of: Worcester Polytechnic Institute In partial fulfillment of the requirements for the degree of: Bachelor of Science For the department of: PHYSICS Advised by: P.K. Aravind September 25, 2014 1 Table of Contents 1. Abstract ..................................................................................................................................................... 4 2. Motivation ................................................................................................................................................. 5 3. Project Objectives ..................................................................................................................................... 6 4. Introduction ............................................................................................................................................... 7 4.1 What are Exoplanets? ......................................................................................................................... 7 4.2 Why Search for Them? ....................................................................................................................... 8 4.3 A Brief History of Exoplanets, From Antiquity to Modern Times ..................................................... 9 4.3.1 Origins of the Planetary Sciences ................................................................................................ 9 4.3.2 The Emergence and Development of -
Biological Damage of Uv Radiation in Environments Of
BIOLOGICAL DAMAGE OF UV RADIATION IN ENVIRONMENTS OF F-TYPE STARS by SATOKO SATO Presented to the Faculty of the Graduate School of The University of Texas at Arlington in Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY THE UNIVERSITY OF TEXAS AT ARLINGTON May 2014 Copyright c by Satoko Sato 2014 All Rights Reserved I dedicate this to my daughter Akari Y. Sato. Acknowledgements First of all, I would like to thank my supervising professor Dr. Manfred Cuntz. His advice on my research and academic life has always been invaluable. I would have given up the Ph.D. bound program without his encouragement and generous support as the supervising professor during a few difficult times in my life. I would like to thank Dr. Wei Chen, Dr. Yue Deng, Dr. Zdzislaw E. Musielak, and Dr. Sangwook Park for their interest in my research and for their time to serve in my committee. Next, I would like to acknowledge my research collaborators at University of Guanajuato, Cecilia M. Guerra Olvera, Dr. Dennis Jack, and Dr. Klaus-Peter Schr¨oder,for providing me the data of F-type evolutionary tracks and UV spectra. I would also like to express my deep gratitude to my parents, Hideki and Kumiko Yakushigawa, for their enormous support in many ways in my entire life, and to my sister, Tomoko Yakushigawa, for her constant encouragement to me. I am grateful to my husband, Makito Sato, and my daughter, Akari Y. Sato. Their presence always gives me strength. I am thankful to my parents-in-law, Hisao and Tsuguho Sato, and my grand-parents-in-law, Kanji and Ayako Momoi, for their financial support and prayers. -
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. -
Ian J. M. Crossfield Appointments & Experience Education
Ian J. M. Crossfield http://www.mit.edu/∼iancross/ Massachusetts Institute of Technology, Physics Department [email protected] MIT Kavli Institute +1 949 923-0578 (USA) 77 Massachusetts Avenue, Cambridge, MA 02139 Appointments & Experience MIT Department of Physics Assistant Professor 07/2017- present • Discovery of new planets using TESS, studying planets' atmospheres using HST and ground-based tele- scopes, new isotopic measurements of cool dwarfs. University of California, Santa Cruz Adjunct Professor 12/2017- present Associate Researcher 06/2017- 07/2017 Sagan Fellow 08/2016- 05/2016 • Continued the discovery of new planets using K2 and characterizing their atmospheres with ground- and space-based telescopes. U. Arizona, Lunar and Planetary Lab Sagan Fellow 07/2014 - 08/2016 • Work to understand hazy atmospheres of extrasolar objects: cloud properties and molecular abundances in known `super-Earth' planets; discovering new transiting planets with the K2 mission. Max Planck Institut f¨urAstronomie Postdoctoral Fellow 07/2012 - 06/2014 • Extrasolar planet atmosphere characterization via transits and secondary eclipses from ground- and space-based observatories. High-resolution spectroscopy of nearby brown dwarfs. University of California, Los Angeles Graduate Studies 09/2007 - 06/2012 • Characterization of exoplanet atmospheres via phase curves, secondary eclipses, and transits. Refined parameters of known transiting planets via optical transit photometry. NASA/Jet Propulsion Laboratory Systems Engineer 07/2004 - 06/2007 • High-contrast instrument performance simulations for the Gemini Planet Imager and TMT Planet For- mation Instrument. Optical testbed work for the Space Interferometry Mission. Exoplanet science. Education University of California, Los Angeles, Los Angeles, California USA • Ph.D., Astrophysics (Dissertation Year Fellow), 06/2012 Advisor: Prof. -
November 2016 BRAS Newsletter
NovemberOctober 20162016 IssueIssue th Next Meeting: Monday, November 14 at 7PM at HRPO (2nd Mondays, Highland Road Park Observatory) Join us at this meeting to celebrate BRAS’s 35th Anniversary. Several founding members will be there to help us remember and appreciate our history and achievements. What's In This Issue? President’s Message Secretary's Summary of October Meeting Outreach Report Light Pollution Committee Report Recent Forum Entries 20/20 Vision Campaign Messages from the HRPO The Edge of Night Fall Rocket Camp Observing Notes: Andromeda – The Chained Woman, by John Nagle & Mythology Newsletter of the Baton Rouge Astronomical Society November 2016 President’s Message November already! Holiday season, cold and long nights (all the better to observe under), and it is also the 35th anniversary of the founding of our organization, the Baton Rouge Astronomical Society, commonly called BRAS. At our meeting this month, to “celebrate” the anniversary, we will have cake and refreshments as some of the founders and first members of 35 years ago will regale us with the “story” of how BRAS came into existence, and some of its history. December’s meeting is our annual “pot luck” dinner and the election of officers for the next year. Be thinking about who you want as officers next year. Be prepared to nominate and/or second nominations. Also be prepared for a good meal. The first 3 members who told me they found the Witch Head Nebulae silhouette hidden in the October newsletter were Coy F. Wagoner, Robert Bourgeois, and Cathy Gabel. Congratulations, and well done. -
Astrometric Search for Extrasolar Planets in Stellar Multiple Systems
Astrometric search for extrasolar planets in stellar multiple systems Dissertation submitted in partial fulfillment of the requirements for the degree of doctor rerum naturalium (Dr. rer. nat.) submitted to the faculty council for physics and astronomy of the Friedrich-Schiller-University Jena by graduate physicist Tristan Alexander Röll, born at 30.01.1981 in Friedrichroda. Referees: 1. Prof. Dr. Ralph Neuhäuser (FSU Jena, Germany) 2. Prof. Dr. Thomas Preibisch (LMU München, Germany) 3. Dr. Guillermo Torres (CfA Harvard, Boston, USA) Day of disputation: 17 May 2011 In Memoriam Siegmund Meisch ? 15.11.1951 † 01.08.2009 “Gehe nicht, wohin der Weg führen mag, sondern dorthin, wo kein Weg ist, und hinterlasse eine Spur ... ” Jean Paul Contents 1. Introduction1 1.1. Motivation........................1 1.2. Aims of this work....................4 1.3. Astrometry - a short review...............6 1.4. Search for extrasolar planets..............9 1.5. Extrasolar planets in stellar multiple systems..... 13 2. Observational challenges 29 2.1. Astrometric method................... 30 2.2. Stellar effects...................... 33 2.2.1. Differential parallaxe.............. 33 2.2.2. Stellar activity.................. 35 2.3. Atmospheric effects................... 36 2.3.1. Atmospheric turbulences............ 36 2.3.2. Differential atmospheric refraction....... 40 2.4. Relativistic effects.................... 45 2.4.1. Differential stellar aberration.......... 45 2.4.2. Differential gravitational light deflection.... 49 2.5. Target and instrument selection............ 51 2.5.1. Instrument requirements............ 51 2.5.2. Target requirements............... 53 3. Data analysis 57 3.1. Object detection..................... 57 3.2. Statistical analysis.................... 58 3.3. Check for an astrometric signal............. 59 3.4. Speckle interferometry................. -
REBECCA OPPENHEIMER 1999 Ph.D., Astronomy, California
REBECCA OPPENHEIMER CURATOR AND PROFESSOR DEPARTMENT OF ASTROPHYSICS AMERICAN MUSEUM OF NATURAL HISTORY 79TH STREET AT CENTRAL PARK WEST NEW YORK, NY 10024-5192, USA http://orcid.org/0000-0001-7130-7681 [email protected] research.amNh.org/users/bro EDUCATION 1999 Ph.D., Astronomy, California Institute of Technology, “Brown Dwarf Companions of Nearby Stars,” Advisor: S. R. Kulkarni 1994 B.A., Physics, Columbia College, Columbia University AWARDS AND HONORS 2009 BlavatNik Award for YouNg ScieNtists, New York Academy of ScieNces 2003 Carter Memorial Lecturer, Carter Observatory, WelliNgtoN, New ZealaNd 2002-2004 Kalbfleisch Research Fellowship, AmericaN Museum of Natural History 2002 NatioNal Academies of ScieNce, BeckmaN FroNtiers of ScieNce, INvited ParticipaNt 1999-2002 Hubble Postdoctoral Research Fellowship 1994-1997 NatioNal ScieNce FouNdatioN Graduate Research Fellowship 1990-1994 I. I. Rabi ScieNce Scholar, Columbia University 1990 WestiNghouse ScieNce CompetitioN, HoNorable MeNtioN 1989 New York Academy of ScieNces ScieNce WritiNg CompetitioN, First Place EMPLOYMENT 2013-present Curator, DepartmeNt of Astrophysics, AmericaN Museum of Natural History 2008-2013 Associate Curator, DepartmeNt of Astrophysics, AmericaN Museum of Natural History 2004-2008 AssistaNt Curator, DepartmeNt of Astrophysics, AmericaN Museum of Natural History 2002-2004 Research Fellow, AmericaN Museum of Natural History 1999-2002 Hubble Research Fellow, University of CaliforNia-Berkeley, AMNH 1994-1997 Graduate Research Fellow, CaliforNia INstitute of TechNology, with Kulkarni 1993-1994 Instructor, Barnard College Physics DepartmeNt, History of Physics 1993-1995 Instructor, Columbia UNiversity Summer Program for High School StudeNts 1993 Summer Research Student, Nat’l Astronomy and Ionosphere Center, Arecibo, PR 1992 Summer Research StudeNt, Nat’l Radio AstroNomy Obs., Very Large Array 1991-1994 Research AssistaNt, Columbia Astrophysics Laboratory, Advisor: D.