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The VLA-COSMOS 3 GHz Large Project: Evolution of Specific Star Formation Rates out to z ∼ 5
The Astrophysical Journal ( IF 4.8 ) Pub Date : 2020-08-12 , DOI: 10.3847/1538-4357/aba044
Sarah K. Leslie 1, 2 , Eva Schinnerer 1 , Daizhong Liu 1 , Benjamin Magnelli 3 , Hiddo Algera 2 , Alexander Karim 3 , Iary Davidzon 4, 5 , Ghassem Gozaliasl 6, 7 , Eric F. Jimnez-Andrade 3 , Philipp Lang 1 , Mark T. Sargent 8 , Mladen Novak 1 , Brent Groves 9 , Vernesa Smolčić 10 , Giovanni Zamorani 11 , Mattia Vaccari 12, 13 , Andrew Battisti 9 , Eleni Vardoulaki 3 , Yingjie Peng 14 , Jeyhan Kartaltepe 15
Affiliation  

We provide a coherent, uniform measurement of the evolution of the logarithmic star formation rate (SFR) - stellar mass ($M_*$) relation, called the main sequence of star-forming galaxies (MS), for galaxies out to $z\sim5$. We measure the MS using mean stacks of 3 GHz radio continuum images to derive average SFRs for $\sim$200,000 mass-selected galaxies at $z>0.3$ in the COSMOS field. We describe the MS relation adopting a new model that incorporates a linear relation at low stellar mass (log($M_*$/M$_\odot$)$<$10) and a flattening at high stellar mass that becomes more prominent at low redshift ($z<1.5$). We find that the SFR density peaks at $1.5

中文翻译:

VLA-COSMOS 3 GHz 大型项目:特定恒星形成率演化到 z ∼ 5

我们提供了对数恒星形成率 (SFR) - 恒星质量 ($M_*$) 关系演变的一致、统一的测量,称为恒星形成星系的主序 (MS),对于星系到 $z\ sim5$。我们使用 3 GHz 射电连续谱图像的平均堆栈测量 MS,以推导出 COSMOS 场中 $\sim$200,000 质量选择星系的平均恒星形成率。我们描述了采用新模型的 MS 关系,该模型结合了低恒星质量(log($M_*$/M$_\odot$)$<$10)的线性关系和高恒星质量的扁平化,在低质量时变得更加突出红移($z<1.5$)。我们发现 SFR 密度峰值为 1.5 美元
更新日期:2020-08-12
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