Modeling High-Mass Star Formation and Ultracompact H ii Regions
نویسندگان
چکیده
منابع مشابه
Ultracompact H Ii Regions
RESUMEN Discutimos algunos resultados observacionales recientes sobre regiones H II ultracompactas. En particular, discutimos la emisión extendida de algunas regiones H II UC y el descubrimiento de una nueva clase, denominada regiones H II " hipercompactas ". Además, describimos la obtención de la estructura de densidad usando la técnica del análisis deí ındice espectral. ABSTRACT We discuss so...
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We present the results of an extensive imaging campaign on the ultracompact Hii region G5.89-0.39 at nearand mid-infrared wavelengths. High-resolution data were taken in the H , K ′, and L bands using ESO’s adaptive optics system ADONIS. They are complemented by conventional narrowband images in Brγ and H2(1−0)S1 as well as by mid-infrared broadand narrow-band images. We also mapped the 1.3 mm ...
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The spatial morphology, spectral characteristics, and time variability of ultracompact H ii regions provide strong constraints on the process of massive star formation. We have performed simulations of the gravitational collapse of rotating molecular cloud cores, including treatments of the propagation of ionizing and non-ionizing radiation. We here present synthetic radio continuum observation...
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We present mid-IR 21μm images of a sample of radio selected Ultracompact H ii (UCH ii) regions, obtained with the Midcourse Space Experiment (MSX). All, with one possible exception, are detected at mid-IR wavelengths, sampling the warm dust emission of the cocoons of the OB star central exciting sources. Many of the UCH ii regions have nearby (up to ≈ few pc distant) companion dust emission sou...
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...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2010
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921311000251