Faint emission lines in the Galactic H II regions M16, M20 and NGC 3603
نویسندگان
چکیده
منابع مشابه
CHEMICAL COMPOSITION AND MIXING IN GIANT H ii REGIONS: NGC 3603, 30 DORADUS, AND N66
We investigate the chemical abundances of NGC 3603 in the Milky Way, of 30 Doradus in the Large Magellanic Cloud, and of N66 in the Small Magellanic Cloud. Mid-infrared observations with the Infrared Spectrograph on board the Spitzer Space Telescope allow us to probe the properties of distinct physical regions within each object, the central ionizing cluster, the surrounding ionized gas, photod...
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We present a search for water maser emission at 22 GHz associated with young low-mass protostars in six H ii regions —M16, M20, NGC 2264, NGC 6357, S125, and S140. The survey was conducted with the NRAO Very Large Array from 2000 to 2002. For several of these H ii regions, ours are the first high-resolution observations of water masers. We detected 16 water masers: eight in M16, four in M20, th...
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The dust extinction towards bright H ii region-sin NGC 598 and NGC 5457 has been studied in detail by forming line ratios of Balmer and Paschen emission lines covering a large wavelength range. Three homogeneous models of the geometrical distribution of the emitting sources and the obscuring dust have been tested. Only for low extinctions can the data be fit by a homogeneous slab. For most of t...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2006
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2006.10105.x