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

Author(s): Steinhardt, Charles L; Speagle, Josh S; Capak, Peter; Silverman, John D; Carollo, Marcella; et al

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Abstract: 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.
Publication Date: 6-Aug-2014
Electronic Publication Date: Aug-2014
Citation: Steinhardt, Charles L, Speagle, Josh S, Capak, Peter, Silverman, John D, Carollo, Marcella, Dunlop, James, Hashimoto, Yasuhiro, Hsieh, Bau-Ching, Ilbert, Olivier, Le Fevre, Olivier, Le Floc h, Emeric, Lee, Nicholas, Lin, Lihwai, Lin, Yen-Ting, Masters, Dan, McCracken, Henry J, Nagao, Tohru, Petric, Andreea, Salvato, Mara, Sanders, Dave, Scoville, Nick, Sheth, Kartik, Strauss, Michael A, Taniguchi, Yoshiaki. (2014). Star Formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH). \apjl, 791 (L25 - L25. doi:10.1088/2041-8205/791/2/L25
DOI: doi:10.1088/2041-8205/791/2/L25
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Type of Material: Journal Article
Journal/Proceeding Title: Astrophysical Journal Letters
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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