TY - JOUR

T1 - The ALMA Spectroscopic Survey Large Program

T2 - The Infrared Excess ofz=1.5-10 UV-selected Galaxies and the Implied High-redshift Star Formation History

AU - Bouwens, Rychard

AU - Gonzalez-Lopez, Jorge

AU - Aravena, Manuel

AU - Decarli, Roberto

AU - Novak, Mladen

AU - Stefanon, Mauro

AU - Walter, Fabian

AU - Boogaard, Leindert

AU - Carilli, Chris

AU - Dudzeviciute, Ugne

AU - Smail, Ian

AU - Daddi, Emanuele

AU - da Cunha, Elisabete

AU - Ivison, Rob

AU - Nanayakkara, Themiya

AU - Cortes, Paulo

AU - Cox, Pierre

AU - Inami, Hanae

AU - Oesch, Pascal

AU - Popping, Gergoe

AU - Riechers, Dominik

AU - van der Werf, Paul

AU - Weiss, Axel

AU - Fudamoto, Yoshi

AU - Wagg, Jeff

PY - 2020/10/19

Y1 - 2020/10/19

N2 - We make use of sensitive (9.3 mu Jy beam(-1) rms) 1.2 mm continuum observations from the Atacama Large Millimeter/submillimeter Array (ALMA) Spectroscopic Survey in the Hubble Ultra-Deep Field (ASPECS) large program to probe dust-enshrouded star formation from 1362 Lyman-break galaxies spanning the redshift range z.=.1.5-10 (to similar to 7-28 M-circle dot yr(-1) at 4s over the entire range). We find that the fraction of ALMA-detected galaxies in our z.=.1.5-10 samples increases steeply with stellar mass, with the detection fraction rising from 0% at 10(9.0) M-circle dot to 85(-18)(+9) % at >10(10) M-circle dot. Moreover, on stacking all 1253 low-mass (10(9.5) M-circle dot and an SMC-like relation at lower masses. Using stellar mass and beta measurements for z similar to 2 galaxies over the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey, we derive a new empirical relation between beta and stellar mass and then use this correlation to show that our IRX-beta and IRX-stellar mass relations are consistent with each other. We then use these constraints to express the IRX as a bivariate function of beta and stellar mass. Finally, we present updated estimates of star formation rate density determinations at z > 3, leveraging present improvements in the measured IRX and recent probes of ultraluminous far-IR galaxies at z > 2.

AB - We make use of sensitive (9.3 mu Jy beam(-1) rms) 1.2 mm continuum observations from the Atacama Large Millimeter/submillimeter Array (ALMA) Spectroscopic Survey in the Hubble Ultra-Deep Field (ASPECS) large program to probe dust-enshrouded star formation from 1362 Lyman-break galaxies spanning the redshift range z.=.1.5-10 (to similar to 7-28 M-circle dot yr(-1) at 4s over the entire range). We find that the fraction of ALMA-detected galaxies in our z.=.1.5-10 samples increases steeply with stellar mass, with the detection fraction rising from 0% at 10(9.0) M-circle dot to 85(-18)(+9) % at >10(10) M-circle dot. Moreover, on stacking all 1253 low-mass (10(9.5) M-circle dot and an SMC-like relation at lower masses. Using stellar mass and beta measurements for z similar to 2 galaxies over the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey, we derive a new empirical relation between beta and stellar mass and then use this correlation to show that our IRX-beta and IRX-stellar mass relations are consistent with each other. We then use these constraints to express the IRX as a bivariate function of beta and stellar mass. Finally, we present updated estimates of star formation rate density determinations at z > 3, leveraging present improvements in the measured IRX and recent probes of ultraluminous far-IR galaxies at z > 2.

KW - Lyman-break galaxies

KW - Infrared excess

KW - High-redshift galaxies

KW - Dust continuum emission

KW - Far infrared astronomy

KW - ULTRA-DEEP FIELD

KW - ULTRAVIOLET LUMINOSITY DENSITY

KW - SPECTRAL ENERGY-DISTRIBUTIONS

KW - LYMAN-BREAK GALAXIES

KW - STELLAR MASS DENSITY

KW - SIMILAR-TO 2

KW - FORMING GALAXIES

KW - DUST ATTENUATION

KW - H-ALPHA

KW - SUBMILLIMETER GALAXIES

U2 - 10.3847/1538-4357/abb830

DO - 10.3847/1538-4357/abb830

M3 - Journal article

VL - 902

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 112

ER -