Cooling of Young Stars Growing by Disk Accretion
نویسندگان
چکیده
منابع مشابه
Accretion Disks around Young Stars: Lifetimes, Disk Locking and Variability
We report the findings of a comprehensive study of disk accretion and related phenomena in four of the nearest young stellar associations spanning 6-30 million years in age, an epoch that may coincide with the late stages of planet formation. We have obtained ∼650 multi-epoch high-resolution optical spectra of 100 lowmass stars that are likely members of the η Chamaeleontis (∼6 Myr), TW Hydrae ...
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We perform calculations of pre-main sequence evolution of stars from 1 to 85M⊙ with growing accretion rates Ṁ . The values of Ṁ are taken equal to a constant fraction f̃ of the rates of the mass outflows observed by Churchwell (1998) and Henning (2000). The evolution of the various stellar parameters is given, as well as the evolution of the disc luminosity; electronic tables are provided as a s...
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. o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o We review the evidence pertaining t the lifetimes f planet-f rming disks and discuss p ssible disk dispersal mechanisms: (1) visc us accreti n f material nt the central s urce, (2) cl se stellar enc unters, (3) stellar winds, and (4) ph t evap rati n by ultravi let radia...
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We discuss the importance of accretion in calculating disk models for young stellar objects. In particular, we show that a disk inner rim, irradiated by both the star and the accretion shocks at the stellar surface, can naturally explain recent observations of DG Tau with the Keck interferometer. We present models for two objects, with mass accretion rates differing by almost two orders of magn...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/588420