Detection of a low-mass stellar companion to the accelerating A2IV star HR 1645

Autor: Robert J. De Rosa, Eric L. Nielsen, Julien Rameau, Gaspard Duchêne, Alexandra Z. Greenbaum, Jason J. Wang, S. Mark Ammons, Vanessa P. Bailey, Travis Barman, Joanna Bulger, Jeffrey Chilcote, Tara Cotten, Rene Doyon, Thomas M. Esposito, Michael P. Fitzgerald, Katherine B. Follette, Benjamin L. Gerard, Stephen J. Goodsell, James R. Graham, Pascale Hibon, Justin Hom, Li-Wei Hung, Patrick Ingraham, Paul Kalas, Quinn Konopacky, James E. Larkin, Bruce Macintosh, Jérôme Maire, Franck Marchis, Mark S. Marley, Christian Marois, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David Palmer, Jennifer Patience, Marshall Perrin, Lisa Poyneer, Laurent Pueyo, Abhijith Rajan, Fredrik T. Rantakyrö, Bin Ren, Jean-Baptiste Ruffio, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Inseok Song, Remi Soummer, Melisa Tallis, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane Wiktorowicz, Schuyler Wolff
Jazyk: angličtina
Rok vydání: 2019
Předmět:
010504 meteorology & atmospheric sciences
Brown dwarf
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
Acceleration
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
Gemini Planet Imager
010303 astronomy & astrophysics
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
0105 earth and related environmental sciences
Physics
Earth and Planetary Astrophysics (astro-ph.EP)
Astronomy and Astrophysics
Mass ratio
Stars
Orbit
Amplitude
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
Astrophysics::Earth and Planetary Astrophysics
Low Mass
Astrophysics - Instrumentation and Methods for Astrophysics
Astrophysics - Earth and Planetary Astrophysics
Zdroj: The Astronomical Journal, 158(6), 226
Popis: The $\sim500$\, Myr A2IV star HR 1645 has one of the most significant low-amplitude accelerations of nearby early-type stars measured from a comparison of the {\it Hipparcos} and {\it Gaia} astrometric catalogues. This signal is consistent with either a stellar companion with a moderate mass ratio ($q\sim0.5$) on a short period ($P
14 pages, 9 figures. Accepted for publication in the Astronomical Journal
Databáze: OpenAIRE
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