The ALMA Spectroscopic Survey Large Program: The Infrared Excess ofz=1.5-10 UV-selected Galaxies and the Implied High-redshift Star Formation History

Research output: Contribution to journalJournal articlepeer-review

  • Rychard Bouwens
  • Jorge Gonzalez-Lopez
  • Manuel Aravena
  • Roberto Decarli
  • Mladen Novak
  • Mauro Stefanon
  • Fabian Walter
  • Leindert Boogaard
  • Chris Carilli
  • Ugne Dudzeviciute
  • Ian Smail
  • Emanuele Daddi
  • Elisabete da Cunha
  • Rob Ivison
  • Themiya Nanayakkara
  • Paulo Cortes
  • Pierre Cox
  • Hanae Inami
  • Pascal Oesch
  • Gergoe Popping
  • And 5 others
  • Dominik Riechers
  • Paul van der Werf
  • Axel Weiss
  • Yoshi Fudamoto
  • Jeff Wagg

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.

Original languageEnglish
Article number112
JournalAstrophysical Journal
Volume902
Issue number2
Number of pages29
ISSN0004-637X
DOIs
Publication statusPublished - 19 Oct 2020

    Research areas

  • Lyman-break galaxies, Infrared excess, High-redshift galaxies, Dust continuum emission, Far infrared astronomy, ULTRA-DEEP FIELD, ULTRAVIOLET LUMINOSITY DENSITY, SPECTRAL ENERGY-DISTRIBUTIONS, LYMAN-BREAK GALAXIES, STELLAR MASS DENSITY, SIMILAR-TO 2, FORMING GALAXIES, DUST ATTENUATION, H-ALPHA, SUBMILLIMETER GALAXIES

Links

ID: 253190624