The multiband photometry of GRB host galaxies: Comparison with the spectral energy distributions of nearby galaxies and theoretical modeling

被引：0
|
作者：
Sokolov, VV [1 ]
Fatkhullin, TA [1 ]
Komarova, VN [1 ]
Kasimova, ER [1 ]
Korchagin, VI [1 ]
机构：
[1] RAS, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
来源：
GAMMA-RAY BURSTS IN THE AFTERGLOW ERA | 2001年
关键词：
D O I：
10.1007/10853853_66
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present one of the results of BVRI photometry of the hosts of GRB for the host galaxy of GRB 970508 and the theoretical modeling of its continuum spectral energy distribution (SED) to show that it is important to take into account internal extinction in the host galaxies. We compared the BVRI broad-band flux spectrum of the host to template SEDs of local starburst galaxies and found that there is a significant internal extintion in this host. Moreover, this comparison allows us to derive the absolute magnitude (M-Brest) and rouhgly estimate reddening (A(V)). Population synthesis modeling of the continuum SED for different reddening laws ([4] and [5]) demostrates that the observational data of the host galaxy of GRB 970508 are best fitted by the spectral properties of a model SED with extinction of A(V) approximate to 2.
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页码：246 / 248
页数：3
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