Molecular Outflows around High-Mass Young Stellar Objects
نویسندگان
چکیده
منابع مشابه
Molecular outflows around high-mass young stellar objects
We present a study of molecular outflows using high-resolution mapping of the CO (1-0) line emission toward eight relatively nearby 6.7 GHz methanol masers, which are associated with massive star forming regions. Outflows were detected in seven out of eight sources, and five of them clearly show bipolar or multiple outflow morphologies. These outflows have typical masses of a few solar masses, ...
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We review some aspects of the bipolar molecular outflow phenomenon. In particular, we compare the morphological properties, energetics and velocity structures of outflows from high and low-mass protostars and investigate to what extent a common source model can explain outflows from sources of very different luminosities. Many flow properties, in particular the CO spatial and velocity structure...
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μm M L et al. km s−1 TA* Tex CO CO CO ◦ ×H2 MJ Mcl Mcr LCO FCO Lbol bipolar molecular outflows molecular outflows Mcore document A Single Distance Sample of Molecular Outflows from High-Mass Young Stellar Objects Naomi A. Ridge12 Toby J.T. Moore1 N.A. Ridge Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead, CH41 1LD, United Kingdom....
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Context. The formation of massive stars is not well-understood and requires detailed observational studies in order to discriminate between the different proposed star formation models. Aims. We have searched for massive molecular outflows in a sample of high-mass star forming regions, and we have characterised both the outflow properties and those of their associated molecular clumps. With a s...
متن کاملThe structure of molecular clumps around high - mass young stellar objects ⋆
We have used the IRAM 30-m and FCRAO 14-m telescopes to observe the molecular clumps associated with 12 ultracompact (UC) Hii regions in the J=6–5, 8–7 and 13–12 rotational transitions of methyl-acetylene (CH3C2H). Under the assumption of LTE and optically thin emission, we have derived temperature estimates ranging from 30 to 56 K. We estimate that the clumps have diameters of 0.2–1.6 pc, H2 d...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2006
ISSN: 0004-6256,1538-3881
DOI: 10.1086/504466