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 Sanders; Nick Scoville; Kartik Sheth; Michael A. Strauss; Yoshiaki Taniguchi

doi:10.1088/2041-8205/791/2/L25

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

^*Corresponding author for this work

Department of Earth Sciences (Include Institute of Marine Environmental Science and Technology)

Research output: Contribution to journal › Article › peer-review

163 Citations (Scopus)

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_* ≳ 10^11.5 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.

Original language	English
Article number	L25
Journal	Astrophysical Journal Letters
Volume	791
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/791/2/L25
Publication status	Published - 2014 Aug 20

Keywords

galaxies: evolution

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/791/2/L25

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Steinhardt, C. L., Speagle, J. S., Capak, P., Silverman, J. D., Carollo, M., Dunlop, J., Hashimoto, Y., Hsieh, B. C., Ilbert, O., Le Fevre, O., Le Floc'H, E., Lee, N., Lin, L., Lin, Y. T., Masters, D., McCracken, H. J., Nagao, T., Petric, A., Salvato, M., ... Taniguchi, Y. (2014). Star formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH). Astrophysical Journal Letters, 791(2), Article L25. https://doi.org/10.1088/2041-8205/791/2/L25

Steinhardt, CL, Speagle, JS, Capak, P, Silverman, JD, Carollo, M, Dunlop, J, Hashimoto, Y, Hsieh, BC, Ilbert, O, Le Fevre, O, Le Floc'H, E, Lee, N, Lin, L, Lin, YT, Masters, D, McCracken, HJ, Nagao, T, Petric, A, Salvato, M, Sanders, D, Scoville, N, Sheth, K, Strauss, MA & Taniguchi, Y 2014, 'Star formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)', Astrophysical Journal Letters, vol. 791, no. 2, L25. https://doi.org/10.1088/2041-8205/791/2/L25

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

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.",

keywords = "galaxies: evolution",

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

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T1 - Star formation at 4 < z < 6 from the Spitzer Large Area Survey with Hyper-Suprime-Cam (SPLASH)

AU - Steinhardt, Charles L.

AU - Speagle, Josh S.

AU - Capak, Peter

AU - Silverman, John D.

AU - Carollo, Marcella

AU - Dunlop, James

AU - Hashimoto, Yasuhiro

AU - Hsieh, Bau Ching

AU - Ilbert, Olivier

AU - Le Fevre, Olivier

AU - Le Floc'H, Emeric

AU - Lee, Nicholas

AU - Lin, Lihwai

AU - Lin, Yen Ting

AU - Masters, Dan

AU - McCracken, Henry J.

AU - Nagao, Tohru

AU - Petric, Andreea

AU - Salvato, Mara

AU - Sanders, Dave

AU - Scoville, Nick

AU - Sheth, Kartik

AU - Strauss, Michael A.

AU - Taniguchi, Yoshiaki

PY - 2014/8/20

Y1 - 2014/8/20

N2 - 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.

AB - 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.

KW - galaxies: evolution

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

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