2RE J0241 -- 525: a nearby post-T Tauri visual binary system
نویسندگان
چکیده
منابع مشابه
Post-t Tauri Stars: a False Problem
We consider the problem of the apparent lack of old T Tauri stars in low-mass star forming regions in the framework of the standard model of low-mass star formation. We argue that the similarity between molecular cloud lifetime and ambipolar diffusion timescale implies that star formation does not take place instantaneously, nor at a constant rate. We conclude that the probability of finding a ...
متن کاملAccretion disc evolution in single and binary T Tauri stars
We present theoretical models for the evolution of T Tauri stars surrounded by cir-cumstellar discs. The models include the effects of pre-main-sequence stellar and time dependent disc evolution, and incorporate the effects of stellar magnetic fields acting on the inner disc. For single stars, consistency with observations in Taurus-Auriga demands that disc dispersal occurs rapidly, on much les...
متن کاملDiscovery of seven T Tauri stars and a brown dwarf candidate in the nearby
Discovery of seven T Tauri stars and a brown dwarf candidate in the nearby TW Hydrae Association. Abstract We report the discovery of five T Tauri star systems , two of which are resolved binaries, in the vicinity of the nearest known region of recent star formation , the TW Hydrae Association. The newly discovered systems display the same signatures of youth (namely high X-ray flux, large Li a...
متن کاملCan Post T Tauri Stars Be Found ? Yes !
I review the observational challenges of finding post T Tauri stars (PTTS), defined here as low-mass, pre–main-sequence stars with ages of 107–108 yr. Such stars are difficult to find because they are less active than younger T Tauri stars, and they may not be associated with molecular gas. They are useful for studying the evolution of circumstellar disks and stellar activity between the 106-yr...
متن کاملOn the Rotation of Post - T Tauri Stars in Associations
Nearby associations or moving groups of post-T Tauri stars with ages between ∼10 and 30 Myr are excellent objects for the study of the initial spin up phase during the pre-main sequence evolution. An empirical approach is adopted here for the first time with these stars to infer their rotations properties and relations to X-ray emission. Three nearby associations with distances less than 100 pc...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1996
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/281.3.1001