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arXiv 1005.3822astro-ph.CO
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子弹星团中被遮蔽的恒星形成的深赫歇尔视图

Deep Herschel view of obscured star formation in the Bullet cluster

T. D. Rawle, S. M. Chung, D. Fadda, M. Rex, E. Egami, P. G. Pérez-González, B. Altieri, A. W. Blain, C. R. Bridge, A. K. Fiedler, A. H. Gonzalez, M. J. Pereira,… 展开作者

T. D. Rawle, S. M. Chung, D. Fadda, M. Rex, E. Egami, P. G. Pérez-González, B. Altieri, A. W. Blain, C. R. Bridge, A. K. Fiedler, A. H. Gonzalez, M. J. Pereira, J. Richard, I. Smail, I. Valtchanov, M. Zemcov, P. N. Appleton, J. J. Bock, F. Boone, B. Clement, F. Combes, C. D. Dowell, M. Dessauges-Zavadsky, O. Ilbert, R. J. Ivison, M. Jauzac, J. -P. Kneib, D. Lutz, R. Pelló, G. H. Rieke, G. Rodighiero, D. Schaerer, G. P. Smith, G. L. Walth, P. van der Werf, M. W. Werner

摘要:

我们使用来自Herschel Lensing Survey(HLS)的深五波段(100- 500 μ m)数据,完全约束Bullet星系团(z=0.296)和同一场中较小背景系统(z=0.35)中星系的遮蔽恒星形成率SFR_FIR。赫歇尔探测到23个子弹星系团成员,总SFR_FIR = 144 +/- 14 M_sun yr^-1。平均而言,背景系统包含更明亮的远红外(FIR)星系,SFR_FIR高出约50%(21个星系; 207 +/- 9 M_sun yr^-1)。通过最近的模板(SFR_24)从24 μ m通量外推的SFR与SFR_FIR在约60%的星系团中吻合得很好。在剩余的约40%中,由于与相同FIR光度的模板相比,观察到的S_100/S_24(静止帧S_75/S_18)显著过量,SFR_24低估了SFR_FIR。

英文摘要:

We use deep, five band (100-500um) data from the Herschel Lensing Survey (HLS) to fully constrain the obscured star formation rate, SFR_FIR, of galaxies in the Bullet cluster (z=0.296), and a smaller background system (z=0.35) in the same field. Herschel detects 23 Bullet cluster members with a total SFR_FIR = 144 +/- 14 M_sun yr^-1. On average, the background system contains brighter far-infrared (FIR) galaxies, with ~50% higher SFR_FIR (21 galaxies; 207 +/- 9 M_sun yr^-1). SFRs extrapolated from 24um flux via recent templates (SFR_24) agree well with SFR_FIR for ~60% of the cluster galaxies. In the remaining ~40%, SFR_24 underestimates SFR_FIR due to a significant excess in observed S_100/S_24 (rest frame S_75/S_18) compared to templates of the same FIR luminosity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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