| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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|
タイトル |
Spectral Energy Diasributions of Dusty Galaxies |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 著者 |
TAKAGI, Toshinobu
VANSEVICIUS, Vladas
ARIMOTO, Nobuo
|
| 著者所属（英） |
|
|
|
en |
|
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Department of Physics, Rikkyo University |
| 著者所属（英） |
|
|
|
en |
|
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Institute of Physics |
| 著者所属（英） |
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en |
|
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Institute of Astronomy, School of Science, University of Tokyo |
| 出版者 |
|
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出版者 |
宇宙科学研究所 |
| 出版者（英） |
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|
出版者 |
Institute of Space and Astronautical Science |
| 書誌情報 |
en : The Institute of Space and Astronautical Science report. S.P. : Mid- and Far-Infrared Astronomy and Future Space Mission
巻 14,
p. 155-162,
発行日 2000-12
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| 抄録（英） |
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|
内容記述タイプ |
Other |
|
内容記述 |
We present a model of spectral energy distributions (SEDs). This model employstwo processes of dust heating: heating by radiation and heating by hot gas. The radiation fieldsand the resulting SEDs are calculated by a software code that treats the radiative transfer byassuming spherical symmetry. Using a dust model with a mixture of graphite, silicate and PAHs,we reproduce the standard extinction curve and the spectrum of the cirrus emission in the Galaxy.The temperature fluctuation of dust particles is taken into account wherever the enthalpy of a dustparticle that corresponds to the equilibrium temperature in a given radiation field is less than theenergy of one UV photon.We derived the SEDs of a starburst galaxy (M82), an elliptical galaxy (NGC2768) and a cluster ofgalaxies (the Coma cluster). The derived age of M82 is 500 Myr when the V-band optical depth,γv, is 3.5. In the optically thin case, such as NGC2768, the spatial distribution of dust in thegalaxy is derived from the SED fitting, by fixing the size of galaxy. We conclude that the spatialdistribution of dust is the same as that of stars in NGC2768. The 120 μm emission from theComa cluster detected by ISO is reproduced by the model with γv = 0.002. It is found that dustparticles in the intracluster space is mainly heated by the hot X-ray emitting gas, although theheating by the intracluster radiation field is important for the spectrum at the submillimeter andlonger wavelengths. |
| ISSN |
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|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0288-433X |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA10455137 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: SA4590661000 |
SA4590661.pdf (256.4 kB)
