New wide stellar companions of exoplanet host stars
نویسندگان
چکیده
منابع مشابه
Limits on Stellar Companions to Exoplanet Host Stars with Eccentric Planets
Though there are now many hundreds of confirmed exoplanets known, the binarity of exoplanet host stars is not well understood. This is particularly true of host stars which harbor a giant planet in a highly eccentric orbit since these are more likely to have had a dramatic dynamical history which transferred angular momentum to the planet. Here we present observations of four exoplanet host sta...
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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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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 کاملLithium abundances in exoplanet-host stars : modelling
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...
متن کاملNew Distant Companions to Known Nearby Stars. Ii. Faint Companions of Hipparcos Stars and the Frequency of Wide Binary Systems
We perform a search for faint, common proper motion companions of Hipparcos stars using the recently published LSPM-north catalog of stars with proper motion μ > 0.15 yr−1. Our survey uncovers a total of 521 systems with angular separations 3 < ∆θ < 1500, with 15 triples and 1 quadruple. Our new list of wide systems with Hipparcos primaries includes 130 systems identified here for the first tim...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stu044