The Local Interstellar Ultraviolet Radiation Field
نویسندگان
چکیده
منابع مشابه
The Local Interstellar Ultraviolet Radiation Field
I have used theHipparcos Input Catalogue, together with Kurucz model stellar atmospheres and information on the strength of the interstellar extinction, to create a model of the expected intensity and spectral distribution of the local interstellar ultraviolet radiation field, under various assumptions concerning the albedo a of the interstellar grains. (This ultraviolet radiation field is of p...
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Far Ultraviolet (FUV, 6 eV< hν <13.6 eV) radiation has been recognized as the main source of heating of the neutral interstellar gas, and, as a consequence, it determines whether the thermal balance of the neutral gas results in cold (T ∼ 50− 100K) clouds (CNM), warm (T ∼ 104K) clouds (WNM), or a combination of the two. High FUV fields convert the neutral gas to WNM, while low fields result in ...
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Astro-2 has revealed a broad weak spectral feature in the ultraviolet interstellar linear polarization for two lines of sight, connrming the original detection toward HD 197770 and adding HD 147933-4. These are the only two polarization features found in some 30 lines of sight now observed. Both features are centered close to 2175 A, the position of the ubiquitous ultraviolet extinction bump. T...
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The orientation of the local interstellar magnetic field introduces asymmetries in the heliosphere that affect the location of heliospheric radio emissions and the streaming direction of ions from the termination shock of the solar wind. We combined observations of radio emissions and energetic particle streaming with extensive three-dimensional magnetohydrodynamic computer simulations of magne...
متن کاملThe Local Interstellar Medium
Substantial progress in the field of the Local Interstellar Medium has been largely due to recent launches of space missions, mostly in the UV and X–ray domains, but also to ground-based observations, mainly in high resolution spectroscopy. However, a clear gap seems to remain between the wealth of new data and the theoretical understanding. This paper gives an overview of some observational as...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2002
ISSN: 0004-637X,1538-4357
DOI: 10.1086/339623