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Aperture synthesis observations of galactic H II regions. VI - Several isolated H II regions
, 1977 openaire +1 more source
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Annual Review of Astronomy and Astrophysics, 1990
Article de synthese sur les regions H II extragalactiques traitant des morphologies, de la cinematique, des etoiles ionisantes et des abondances ...
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Article de synthese sur les regions H II extragalactiques traitant des morphologies, de la cinematique, des etoiles ionisantes et des abondances ...
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Astrophysics, 1984
The structure of a H II region in the neighborhood of a star with wind is considered. In the initial stages, when the wind pressure is high, the ionized gas collects in a thin shell. After approximately 400,000 years the wind pressure on the shell has decreased so much that the shell structure of the H II region almost disappears.
E. L. Logvinenko, Yu. A. Shchekinov
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The structure of a H II region in the neighborhood of a star with wind is considered. In the initial stages, when the wind pressure is high, the ionized gas collects in a thin shell. After approximately 400,000 years the wind pressure on the shell has decreased so much that the shell structure of the H II region almost disappears.
E. L. Logvinenko, Yu. A. Shchekinov
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The H II regions of Holmberg II
Publications of the Astronomical Society of the Pacific, 1994Calibrated H-alpha and continuum CCD frames are used to measure the emission-line luminosities and mophological characteristics of 82 H II regions in the dwarf irregular galaxy, Ho II, in the M81 group. The assemblage of H II regions is statistically normal: the luminosity function fits a power law with -1.70 and the size distribution is roughly ...
Paul Hodge +2 more
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Astrophysics and Space Science, 2005
This article reviews how observations of dense molecular gas can help us understand the dynamics and evolution of ultra-compact H II (UCHII) regions. Particular attention is paid to the cometary objects, which it is argued are likely to be the dominant class.
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This article reviews how observations of dense molecular gas can help us understand the dynamics and evolution of ultra-compact H II (UCHII) regions. Particular attention is paid to the cometary objects, which it is argued are likely to be the dominant class.
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Publications of the Astronomical Society of the Pacific, 1974
This is a review of the current status of the study of H II regions in other galaxies, especially their spatial distribution and relation to galactic structure. An extensive table compiles all available data on the H-alpha surveys of galaxies.
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This is a review of the current status of the study of H II regions in other galaxies, especially their spatial distribution and relation to galactic structure. An extensive table compiles all available data on the H-alpha surveys of galaxies.
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1987
By virtue of its spectrometers having simultaneous multichannel integration capability and relatively large input apertures, the International Ultraviolet Explorer satellite has been the first instrument capable of effective study of the ultraviolet spectra of the gas from extended H ii regions. This review will concentrate on discussing the results of
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By virtue of its spectrometers having simultaneous multichannel integration capability and relatively large input apertures, the International Ultraviolet Explorer satellite has been the first instrument capable of effective study of the ultraviolet spectra of the gas from extended H ii regions. This review will concentrate on discussing the results of
openaire +1 more source