Results 11 to 20 of about 1,006,206 (194)
Monthly Notices of the Royal Astronomical Society, 2022 Abstract We examine the capacity to identify binary systems from astrometric deviations alone. We apply our analysis to the Gaia eDR3 and DR2 data, specifically the Gaia Catalogue of Nearby Stars. We show we must renormalize (R)UWE over the local volume to avoid biasing local observations, giving a Local Unit Weight Error (LUWE).
Zephyr Penoyre +2 more
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Astrometric Binary Classification via Artificial Neural Networks [PDF]
The Astrophysical JournalWith nearly two billion stars observed and their corresponding astrometric parameters evaluated in the recent Gaia mission, the number of astrometric binary candidates has risen significantly.
Joe Smith
doaj +2 more sources
An Astrometric Study of the Binary Star α Ophiuchi
Astronomical Journal, 2005 The work reported here combines data from the Multichannel Astrometric Photometer (MAP), the European astrometric satellite, Hipparcos, and infrared speckle observations of the nearby subgiant binary star system α Oph. The A5 IV primary is found to have a mass of 2.84 ± 0.19 M⊙, while the approximately K2 V companion has a mass of 0.78 ± 0.058 M⊙.
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Planetary systems in close binary stars: the case of HD 196885 [PDF]
Astronomy and Astrophysics, 2011 Context. More than fifty candidate planets are presently known to orbit one component of a binary or a multiple star system. Planets can therefore form and survive in such an environment, although recent observing surveys indicate that short-separation binaries do not favour the presence of a planetary system around one of the components.
A Eggenberger, H Beust, G Chauvin
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Astrometric and photometric measurements of binary stars with adaptive optics: observations from 2002 [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 Lewis C Roberts
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Astronomy & Astrophysics, 2023 Context.TheGaiaEarly Data Release 3 contained the positions, parallaxes, and proper motions of 1.5 billion sources, some of which did not show a good fit to the ‘single star’ model. Binarity is one of the causes of this.Aims.Four million of these stars were selected and various models were tested to detect binary stars and to derive their parameters ...
Jean-Louis Halbwachs +8 more
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Visual Orbits and Alignments of Planet-hosting Binary Systems
The Astronomical Journal, 2023 Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall.
Kathryn V. Lester +9 more
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A Catalog of Nearby Accelerating Star Candidates in Gaia DR3
The Astronomical Journal, 2023 We describe a new catalog of accelerating star candidates with Gaia G ≤ 17.5 mag and distances d ≤ 100 pc. Designated as the Gaia Nearby Accelerating Star Catalog (GNASC), it contains 29,684 members identified using a supervised machine-learning ...
Marc L. Whiting +3 more
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Microlensing search for extra solar planets [PDF]
, 2015 Gravitational microlensing may be used to probe distant stars for planetary companions. The presence of a planet in the vicinity of a star acting as the lens may cause a short lived anomaly in the observed lightcurve of the lensing event.
Tsapras, Yiannis
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