当前位置: X-MOL 学术Astrophys. Space Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Star formation rate density across the cosmic time
Astrophysics and Space Science ( IF 1.9 ) Pub Date : 2021-02-05 , DOI: 10.1007/s10509-021-03925-7
Jeong Un Jo , Soyoung Youn , Sungeun Kim , Youngjee Park , Jihye Hwang , Joo Hoon Lee , Gwanjeong Kim

We present the star formation rates (SFRs) of galaxies with redshifts of 0 < \(z\) < 6 and cosmic star formation rate densities as a function of redshift. The SFRs for the galaxies at infrared emission have been investigated for 1752 sources from the Spitzer 70 μm observations of the Spitzer COSMOS Legacy survey and the various surveys in the literature. Analyzing the SFRs of these objects provides the distribution of SFRs across the redshift range. We have derived the star formation rate densities (SFRDs) based on the present analysis of SFRs and comoving volume calculated from the cosmic parameters we have used. Our results show a slightly steeper slope at lower and intermediate redshift, 0 < \(z\) < 2. We have found a steep decline of SFRD from \(z=1\) to 0, but measured a peak of SFRD at \(z\approx 2.2-2.4\).



中文翻译:

整个宇宙时间的恒星形成率密度

我们提出红移为0 < \(z \) <6的星系的恒星形成率(SFR),宇宙恒星形成率密度作为红移的函数。从Spitzer COSMOS Legacy调查的Spitzer 70μm观测和文献中的各种调查中,已经对1752个源的红外发射星系的SFR进行了研究。分析这些对象的SFR可提供SFR在红移范围内的分布。我们根据对SFR的当前分析以及根据我们所使用的宇宙参数计算出的共同移动量得出了恒星形成率密度(SFRD)。我们的结果显示,在较低和中间的红移处,斜率略陡,0 < \(z \) <2。我们发现SFRD从\(z = 1 \)急剧下降。到0,但在\(z \约2.2-2.4 \)处测得了SFRD的峰值。

更新日期:2021-02-05
down
wechat
bug