Accretion onto Pre-Main Sequence Binary Stars: The Circumstellar Environment
نویسندگان
چکیده
منابع مشابه
Circumstellar Disks in pre-Main–Sequence Stars
This review covers the properties of disks around pre-main– sequence stars. It is at this time in the evolution that planets form, and it is important to understand the properties of these disks to understand planet formation. I discuss disk shapes, masses and temperatures, the properties of the host stars, disk lifetimes and dissipation processes. Finally, evidence of grain growth during pre-m...
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Observations of submillimeter lines of CO, HCO, HCN and their isotopes from circumstellar disks around low mass pre-main sequence stars are presented. CO lines up to J=6→5, and HCO and HCN lines up to J=4→3, are detected from the disks around LkCa 15 and TW Hya. These lines originate from levels with higher excitation temperatures and critical densities than studied before. Combined with interf...
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Aims. The aim of this paper is to provide a measurement of the mass accretion rate in a large, complete sample of objects in the core of the star forming region ρ Oph. Methods. The sample includes most of the objects (104 out of 111) with evidence of a circumstellar disk from mid-infrared photometry; it covers a stellar mass range from about 0.03 to 3 M⊙ and it is complete to a limiting mass of...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2001
ISSN: 0074-1809
DOI: 10.1017/s0074180900225497