Four new wide binaries among exoplanet host stars
نویسندگان
چکیده
منابع مشابه
Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars
We present four new exoplanets: HIP 14810b and HIP 14810c, HD 154345b, and HD 187123c. The two planets orbiting HIP 14810, from the N2K project, havemasses of 3.9 and 0.76MJ. We have searched the radial velocity time series of 90 known exoplanet systems and found new residual trends due to additional, long period companions. Two stars known to host one exoplanet have sufficient curvature in the...
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Aims. Exoplanet-host stars (EHS) are known to present superficial chemical abundances different from those of stars without any detected planet (NEHS). EHS are, on the average, overmetallic compared to the Sun. The observations also show that, for cool stars, lithium is more depleted in EHS than in NEHS. The aim of this paper is to obtain constraints on possible models able to explain this diff...
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The stellar rotation periods of 10 exoplanet host stars have been determined using newly analysed Ca II H&K flux records from the Mount Wilson Observatory and Strömgren b, y photometric measurements from Tennessee State University’s automatic photometric telescopes at the Fairborn Observatory. Five of the rotation periods have not previously been reported, with that of HD 130322 very strongly d...
متن کاملWide binaries among high-velocity and metal-poor stars
A catalogue of 122 wide binaries is presented. The list was compiled by searching for common proper-motion companions to the more than 1200 high-velocity and metal-poor stars of Schuster and collaborators. We study the separations for the wide binaries (〈a〉 > 25 AU), and find that they follow Oepik’s distribution all the way up to 10 000 AU. A subgroup of them, the ones with the most halo-like ...
متن کاملA new interferometric study of four exoplanet host stars: θ Cygni, 14 Andromedae, υ Andromedae and 42 Draconis⋆⋆⋆
Context. Since the discovery of the first exoplanet in 1995 around a solar-type star, the interest in exoplanetary systems has kept increasing. Studying exoplanet host stars is of the utmost importance to establish the link between the presence of exoplanets around various types of stars and to understand the respective evolution of stars and exoplanets. Aims. Using the limb-darkened diameter (...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20042297