منابع مشابه
New constrains on Gliese 86 B ⋆
Aims. We present the results of multi epochs imaging observations of the companion to the planetary host Gliese 86. Associated to radial velocity measurements, this study aimed at characterizing dynamically the orbital properties and the mass of this companion (here after Gliese 86 B), but also at investigating the possible history of this particular system. Methods. We used the adaptive optics...
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متن کاملOn the Age of Gliese 504
Direct imaging observations of the solar-type star Gl 504 have recently uncovered a faint companion that, on the supposition that the host star has an age of + 160 60 350 Myr, was announced to be a + 4 1.0 4.5 MJ Jovian exoplanet. Here we present the observational evidence that Gl 504 A is an evolved turn-off star of about solar age and by inference its faint companion a low-mass brown dwarf. A...
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This study complements research Indicating that content area novices judge importance In texts on the basis of sentence type (e.g., whether sentences are definitions or facts).% Subjects varying In expertise judged the importance of sentences In physics texts which were presented as definitions or facts. The definitions and facts were Identical in substantive content. Experts and subjects witho...
متن کاملDiscovery of a Brown Dwarf Companion to Gliese 570ABC: A 2MASS T Dwarf Significantly Cooler than Gliese 229B.
We report the discovery of a widely separated (258&farcs;3+/-0&farcs;4) T dwarf companion to the Gl 570ABC system. This new component, Gl 570D, was initially identified from the Two Micron All-Sky Survey. Its near-infrared spectrum shows the 1.6 and 2.2 µm CH4 absorption bands characteristic of T dwarfs, while its common proper motion with the Gl 570ABC system confirms companionship. Gl 570D (M...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20054710