HOT, WARM, AND COLD CORES: GOLDILOCKS MEETS MASSIVE STAR FORMATION
نویسندگان
چکیده
منابع مشابه
Hot Molecular Cores and High-mass Star Formation
This review covers hot cores in the context of high-mass star formation. After giving an overview of chemical processes and diversity during high-mass star formation, it reviews the 'warm envelope' phase which probably precedes the formation of hot cores. Some recent deter-minations of the cosmic-ray ionization rate are discussed, as well as recent evidence for hot cores around low-mass stars. ...
متن کاملHot Molecular Cores and the Formation of Massive Stars
It has been proposed that some hot molecular cores (HMCs) harbor a young embedded massive star, which heats an infalling envelope and accretes mass at a rate high enough to “choke off” an incipient HII region. This class of HMCs would mark the youngest phase known of massive star formation. In order to test this hypothesis, we model this type of object calculating the radiative transfer through...
متن کاملStudies of dense cores in regions of massive star formation
We report the results of a multitransitional study of four southern molecular clouds in the CS J = 2−1, J = 3−2, J = 5 − 4, J = 7 − 6; CO J = 1 − 0, J = 3 − 2; C34S J = 2 − 1 and C18O J = 1 − 0 lines observed with SEST and CSO telescopes. To analyze the obtained maps we applied a MEM deconvolution technique which improves the resolution significantly, if the signal-to-noise ratio is sufficientl...
متن کاملHigh Mass Star Formation by Gravitational Collapse of Massive Cores
The current generation of millimeter interferometers have revealed a population of compact (r ∼< 0.1 pc), massive (M ∼ 100 M⊙) gas cores that are the likely progenitors of massive stars. I review models for the evolution of these objects from the observed massive core phase through collapse and into massive star formation, with particular attention to the least wellunderstood aspects of the pro...
متن کاملVery Cold and Massive Cores near Isoss J18364-0221: Implications for the Initial Conditions of High-mass Star-formation
We report the discovery of two very cold and massive molecular cloud cores in the region ISOSS J18364-0221. The object has been identified by a systematic search for very early evolutionary stages of high-mass stars using the 170μm ISOPHOT Serendipity Survey (ISOSS). Submm continuum and molecular line measurements reveal two compact cores within this region. The first core has a temperature of ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of The Korean Astronomical Society
سال: 2004
ISSN: 1225-4614
DOI: 10.5303/jkas.2004.37.4.265