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arXiv 1010.0673astro-ph.CO
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在HerMES场中探测高红移大质量致密星系

HerMES : SPIRE detection of high redshift massive compact galaxies in GOODS-N field

A. Cava, G. Rodighiero, I. Perez-Fournon, F. Buitrago, I. Trujillo, B. Altieri, A. Amblard, R. Auld, J. Bock, D. Brisbin, D. Burgarella, N. Castro-Rodriguez, P.… 展开作者

A. Cava, G. Rodighiero, I. Perez-Fournon, F. Buitrago, I. Trujillo, B. Altieri, A. Amblard, R. Auld, J. Bock, D. Brisbin, D. Burgarella, N. Castro-Rodriguez, P. Chanial, M. Cirasuolo, D. L. Clements, C. J. Conselice, A. Cooray, S. Eales, D. Elbaz, P. Ferrero, A. Franceschini, J. Glenn, E. A. Gonzalez Solares, M. Griffin, E. Ibar, R. J. Ivison, L. Marchetti, G. E. Morrison, A. M. J. Mortier, S. J. Oliver, M. J. Page, A. Papageorgiou, C. P. Pearson, M. Pohlen, J. I. Rawlings, G. Raymond, D. Rigopoulou, I. G. Roseboom, M. Rowan-Robinson, D. Scott, N. Seymour, A. J. Smith, M. Symeonidis, K. E. Tugwell, M. Vaccari, I. Valtchanov, J. D. Vieira, L. Vigroux, L. Wang, G. Wright

摘要:

利用赫歇尔空间天文台的光谱和光度成像接收器(SPIRE)对GOODS(Great Observatories Origins Deep Survey)北场2<z<3的大质量(Mstar > 10^11Msun)星系样本的静止标架远红外(FIR)特性进行了分析。为了进行这种分析,我们利用了来自HerMES关键程序的数据。样本包括45个大质量星系,其结构参数由HST NICMOS-3表征。我们研究了亚毫米Herschel波段的探测,以及Spitzer 24μm数据,作为形态类型,质量和大小的函数。我们发现在MIPS-24μm处检测到26/45个源,在SPIRE-250μm处检测到15/45个源(所有MIPS-24μm检测),盘状星系更容易被检测到。我们推导出恒星形成率(SFR)和特定的恒星形成率(sSFR)通过拟合我们的源的光谱能量分布(SED),考虑到未检测SPIRE和系统的影响MIPS导出量。我们发现球状星系的平均SFR(50-100 Msun*yr^-1)比盘状星系的平均值(250-300 Msun*yr^-1)低得多(约3倍)。

英文摘要:

We have analysed the rest-frame far infrared (FIR) properties of a sample of massive (Mstar > 10^11Msun) galaxies at 2<z<3 in the GOODS (Great Observatories Origins Deep Survey) North field using the Spectral and Photometric Imaging Receiver (SPIRE) instrument aboard the Herschel Space Observatory. To conduct this analysis we take advantage of the data from the HerMES key program. The sample comprises 45 massive galaxies with structural parameters characterised with HST NICMOS-3. We study detections at submm Herschel bands, together with Spitzer 24μm data, as a function of the morphological type, mass and size. We find that 26/45 sources are detected at MIPS-24μm and 15/45 (all MIPS-24μm detections) are detected at SPIRE-250μm, with disk-like galaxies more easily detected. We derive star formation rates (SFR) and specific star formation rates (sSFR) by fitting the spectral energy distribution (SED) of our sources, taking into account non-detections for SPIRE and systematic effects for MIPS derived quantities. We find that the mean SFR for the spheroidal galaxies (50-100 Msun*yr^-1) is substantially (a factor ~ 3) lower than the mean value presented by disk-like galaxies (250-300 Msun*yr^-1).

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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