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Detection of a low-mass stellar companion to the accelerating A2IV star HR 1645
- Source :
- The Astronomical Journal, 158(6), 226
- Publication Year :
- 2019
-
Abstract
- 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<br />14 pages, 9 figures. Accepted for publication in the Astronomical Journal
- Subjects :
- 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
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- The Astronomical Journal, 158(6), 226
- Accession number :
- edsair.doi.dedup.....23253ae1c7094f7fb174bc165b5f2ce1