Exploring Galaxy Evolution from Infrared Number Counts and Cosmic Infrared Background
Exploring Galaxy Evolution from Infrared Number Counts and Cosmic Infrared Background
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从红外计数和宇宙红外背景探索星系演化
DOI：
10.1093/pasj/53.1.37
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发表时间：
2000
影响因子：
2.3
通讯作者：
U. Observatory
中科院分区：
文献类型：
--
作者：
T. Ishii;H. Hirashita;K. Yoshikawa;H. Matsuhara;K. Kawara;Haruyuki Okuda Division of Particle;A. Sciences;Nagoya University Kwasan;Hida Observatories;K. Y. D. O. Astronomy;Kyoto University Institute of Space;Astronautical Sciences Institute of Astronomy;U. Observatory
最近报道的红外（IR）星系数计数和宇宙红外背景（CIRB）都表明星系在其一生中经历了强烈的演化。我们从这些数据中统计估计了星系的演化历史。我们发现，在红移z = 0.5-1.0处，远红外（FIR）光度的数量级增加是再现豪瑟等人（1998，AAA 070.161.559）报道的140 μm处非常高的CIRB强度所必需的，并且在z = 5处，即使在这些限制条件下允许许多变化，也最多减少到10倍。这一演化历史也满足了IRAS、ISO和SCUBA获得的星系数计数的约束。CIRB所要求的同向红外光度密度的快速演化很好地再现了ISO所获得的星系数计数的非常陡峭的斜率。考虑到星系中金属富集的影响，我们还从获得的远红外光度密度估算了宇宙星星形成历史。导出的SFH随红移在0.075处急剧增加。这与从报道的紫外光度密度估计的SFH是一致的。此外，我们介绍了日本ASTRO-F FIR星系巡天的性能。我们在调查中显示了预期的数量计数。我们还评估了多大的天空区域是必要的，以获得安全的信息星系演化到z 101从调查，并发现，至少需要50-300度。
Recently reported infrared (IR) galaxy number counts and cosmic infrared background (CIRB) all suggest that galaxies have experienced strong evolution sometime in their lifetime. We statistically estimate the galaxy evolution history from these data. We find that an order-of-magnitude increase of the far-infrared (FIR) luminosity at redshift z = 0.5–1.0 is necessary to reproduce the very high CIRB intensity at 140 μm reported by Hauser et al. (1998, AAA 070.161.559) and decreases to, even at most, a factor of 10 toward z ∼ 5, though many variants are allowed within these constraints. This evolution history also satisfies the constraints from the galaxy number counts obtained by IRAS, ISO and, roughly, SCUBA. The rapid evolution of the comoving IR luminosity density required from the CIRB well reproduces the very steep slope of galaxy number counts obtained by ISO. We also estimate the cosmic star formation history (SFH) from the obtained FIR luminosity density, considering the effect of the metal enrichment in galaxies. The derived SFH increases steeply with redshift in 0 0.75. This is consistent with the SFH estimated from the reported ultraviolet luminosity density. In addition, we present the performance of the Japanese ASTRO-F FIR galaxy survey. We show the expected number counts in the survey. We also evaluate how large a sky area is necessary to derive secure information of galaxy evolution up to z ∼ 1 from the survey, and find that at least 50–300 deg is required.