STAR FORMATION AT 4 < z < 6 FROM THE SPITZER LARGE AREA SURVEY WITH HYPER-SUPRIME-CAM (SPLASH)

Using the first 50% of data collected for the Spitzer Large Area Survey with Hyper-Suprime-Cam observations on the 1.8 deg$^2$ Cosmological Evolution Survey we estimate the masses and star formation rates of 3398$M_*$ $>10^{10}$ $M_ \odot$ star-forming galaxies at 4 < $z$ < 6 with a substan...

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Bibliographic Details
Published in:	Astrophysical journal. Letters 2014-08, Vol.791 (2), p.L25
Main Authors:	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
Format:	Article
Language:	eng
Subjects:	Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY CORRELATIONS EXTRAPOLATION GALAXIES MASS RED SHIFT Sciences of the Universe STAR EVOLUTION STARS
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Summary:	Using the first 50% of data collected for the Spitzer Large Area Survey with Hyper-Suprime-Cam observations on the 1.8 deg$^2$ Cosmological Evolution Survey we estimate the masses and star formation rates of 3398$M_$ $>10^{10}$ $M_ \odot$ star-forming galaxies at 4 < $z$ < 6 with a substantial population up to $M_$$\geq$10$^{11.5}$$M_ \odot$. 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 similar to 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 $z$ similar to $6$ or else occurs rapidly, so that few galaxies are visible in transition between star-forming and quenched.
ISSN:	2041-8213 2041-8205 2041-8213