High-mass star formation
نویسندگان
چکیده
منابع مشابه
Chemical Diversity in High-mass Star Formation
Massive star formation exhibits an extremely rich chemistry. However, not much evolutionary details are known yet, especially at high spatial resolution. Therefore, we synthesize previously published Submillimeter Array high-spatial-resolution spectral line observations toward four regions of highmass star formation that are in various evolutionary stages with a range of luminosities. Estimatin...
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In this contribution I will attempt to show that the study of Galactic 6.7 and 12.2 GHz methanol masers themselves, as opposed to the use of methanol masers as signposts, can yield important conclusions contributing to the understanding of high-mass star formation. Due to their exclusive association with star formation, methanol masers are the best tools to do this, and their large number allow...
متن کاملSCUBA imaging of high mass star formation regions
We present 450 and 850μm images of five ultracompact Hii regions (G10.47, G12.21, G13.87, G31.41 and G43.89) taken at 9/15 resolution with SCUBA on the JCMT, and photometric measurements of the central sources at 1350 and 2000μm. We confirm that the sources have high submillimetre fluxes as expected from their IRAS fluxes at 100μm and molecular line emission. Each submillimetre image peaks towa...
متن کاملProbing the initial conditions of high-mass star formation
Most work on high-mass star formation has focused on observations of young massive stars in protoclusters. Very little is known about the preceding stage. Here, we present a new high-resolution study of pre-protocluster regions in tracers exclusively probing the coldest and dense gas (NH2D). The two target regions G29.96−0.02 and G35.20−1.74 (W48) are drawn from the SCAMPS project, which search...
متن کاملHot 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. ...
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ژورنال
عنوان ژورنال: Astronomy & Geophysics
سال: 2013
ISSN: 1366-8781,1468-4004
DOI: 10.1093/astrogeo/att083