Binaries among low-mass stars in nearby young moving groups
نویسندگان
چکیده
منابع مشابه
Empirical Isochrones for Low Mass Stars in Nearby Young Associations
Absolute ages of young stars are important for many issues in pre-main sequence stellar and circumstellar evolution but are long recognized as difficult to derive and calibrate. In this paper, we use literature spectral types and photometry to construct empirical isochrones in HR diagrams for low-mass stars and brown dwarfs in the η Cha, ǫ Cha, and TW Hya Associations and the β Pic and Tuc-Hor ...
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At a distance of ∼ 55 pc, the TW Hydrae Association (Kastner et al. 1997) is almost three times closer than the Taurus molecular clouds, and its estimated age of ∼10 Myr fills a significant gap in the age sequence between previously known 1-Myr-old T Tauri stars and 50-Myr-old nearby open clusters. The group consists mostly of low-mass stars, typically a few tenths as massive as our sun, and in...
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We present results from a JCMT/SCUBA 850 μm search for cold dust around eight nearby young stars belonging to the β Pic (t ≈ 12 Myr) and the Local Association (t ≈ 50 Myr) moving groups. Unlike most past sub-mm studies, our sample was chosen solely on the basis of stellar age. Our observations achieve about an order of magnitude greater sensitivity in dust mass compared to previous work in this...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2017
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201629945