INFRARED SPECTRAL PROPERTIES OF WOLF-RAYET GALAXIES

被引：1
作者：
Martirosian, J. R. [1 ]
Sargsyan, L. A. [2 ]
机构：
[1] Yerevan State Univ, Yerevan, Armenia
[2] Cornell Univ, Ithaca, NY 14853 USA
来源：
ASTROPHYSICS | 2012年 / 55卷 / 03期
关键词：
galaxies: WR type: spectral properties; SPACE-TELESCOPE; SPECTROGRAPH; UNIVERSE;
D O I：
10.1007/s10511-012-9237-6
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present infrared properties of 22 WR galaxies having optical classifications as Starburst Galaxies and having Spitzer IRS mid-infrared spectra available from CASSIS. To understand infrared properties of these galaxies we have compared our sample with two independent ultraviolet-selected starburst galaxy samples. We have compared the hardness of radiation of these three samples, using the ratio of total fluxes of [NeIII] 15.55 mu m and PAH 11.3 mu m, which shows a presence of younger stars in WR galaxies, compared to other UV samples. We also have calibrated the IR and UV SFRs. Our results show that the similar to 35% of the UV luminosity of WR SB galaxies is observed, compared to similar to 9% and similar to 25% of other UV samples. We determine that the classification of objects to pure SB based on criteria EW(6.2 mu m)>0.4 mu m is not applicable for SB galaxies with the youngest star populations.
引用
收藏
页码：306 / 316
页数：11
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