Star formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)

Charles L. Steinhardt*, Josh S. Speagle, Peter Capak, John D. Silverman, Marcella Carollo, James Dunlop, Yasuhiro Hashimoto, Bau Ching Hsieh, Olivier Ilbert, Olivier Le Fevre, Emeric Le Floc'H, Nicholas Lee, Lihwai Lin, Yen Ting Lin, Dan Masters, Henry J. McCracken, Tohru Nagao, Andreea Petric, Mara Salvato, Dave SandersNick Scoville, Kartik Sheth, Michael A. Strauss, Yoshiaki Taniguchi


研究成果: 雜誌貢獻期刊論文同行評審

158 引文 斯高帕斯(Scopus)


Using the first 50% of data collected for the Spitzer Large Area Survey with Hyper-Suprime-Cam observations on the 1.8 deg2 Cosmological Evolution Survey we estimate the masses and star formation rates of 3398 M * > 1010 M star-forming galaxies at 4 < z < 6 with a substantial population up to M* ≳ 1011.5 M. We find that the strong correlation between stellar mass and star formation rate seen at lower redshift (the "main sequence" of star-forming galaxies) extends to z ∼ 6. The observed relation and scatter is consistent with a continued increase in star formation rate at fixed mass in line with extrapolations from lower-redshift observations. It is difficult to explain this continued correlation, especially for the most massive systems, unless the most massive galaxies are forming stars near their Eddington-limited rate from their first collapse. Furthermore, we find no evidence for moderate quenching at higher masses, indicating quenching either has not occurred prior to z ∼ 6 or else occurs rapidly, so that few galaxies are visible in transition between star-forming and quenched.

期刊Astrophysical Journal Letters
出版狀態已發佈 - 2014 8月 20

ASJC Scopus subject areas

  • 天文和天體物理學
  • 空間與行星科學


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