@article{45f0dc2dde21466c9573ef35c6eb5797,
title = "The dust attenuation of star-forming galaxies at z ~ 3 and beyond: New insights from ALMA observations",
abstract = "We present results on the dust attenuation of galaxies at redshift ~3-6 by studying the relationship between the UV spectral slope (βUV) and the infrared excess (IRX; LIR/LUV) using Atacama Large Millimeter/submillimeter Array (ALMA) far-infrared continuum observations. Our study is based on a sample of 67 massive, star-forming galaxies with a median mass of M* ~ 1010.7 M⊙ spanning a redshift range z = 2.6-3.7 (median z = 3.2) that were observed with ALMA at λrest = 300 μm. Both the individual ALMA detections (41 sources) and stacks including all galaxies show the IRX-βUV relationship at z ~ 3 is mostly consistent with that of local starburst galaxies on average. However, we find evidence for a large dispersion around the mean relationship by up to ±0.5 dex. Nevertheless, the locally calibrated dust correction factors based on the IRX-βUV relation are on average applicable to main-sequence z ~ 3 galaxies. This does not appear to be the case at even higher redshifts, however. Using public ALMA observations of z ~ 4-6 galaxies we find evidence for a significant evolution in the IRX-βUV and the IRX-M* relations beyond z ~ 3 towards lower IRX values. We discuss several caveats that could affect these results, including the assumed dust temperature. ALMA observations of larger z > 3 galaxy sample spanning a wide range of physical parameters (e.g. lower stellar mass) will be important to investigate this intriguing redshift evolution further.",
keywords = "Galaxies: ISM, Galaxies: evolution, Galaxies: star formation, Submillimetre: ISM",
author = "Y. Fudamoto and Oesch, {P. A.} and E. Schinnerer and B. Groves and A. Karim and B. Magnelli and Sargent, {M. T.} and P. Cassata and P. Lang and D. Liu and F{\`e}vre, {O. Le} and S. Leslie and V. Smol{\v c}i{\'c} and L. Tasca",
note = "Funding Information: #2012.1.00523.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme ID 179.A-2005 and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium. This work was supported by the Swiss National Science Foundation through the SNSF Professorship grant 157567 {\textquoteleft}Galaxy Build-up at Cosmic Dawn{\textquoteright}. ES acknowledges funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement No. 694343). BG gratefully acknowledges the support of the Australian Research Council as the recipient of a Future Fellowship (FT140101202). MTS acknowledges support from a Royal Society Leverhulme Trust Senior Research Fellowship (LT150041). VS acknowledges support from the European Union{\textquoteright}s Seventh Frame-work programme under grant agreement 337595 (ERC Starting Grant, {\textquoteleft}CoSMass{\textquoteright}). OLF acknowledges support from the European Research Council Advanced Grant ERC-2010-AdG-268107-EARLY. Funding Information: The authors thank the anonymous referee for very helpful comments that improved this paper. The authors further thank A. Ferrara, R. Bouwens and N. Reddy for very helpful discussions related to this work. This paper makes use of the following ALMA data: ADS/JAO.ALMA#2013.1.00151.S, ADS/JAO.ALMA#2013.1.00034.S and ADS/JAO.ALMA #2012.1.00523.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada) and NSC and ASIAA (Taiwan) and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ. Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under ESO programme ID 179.A-2005 and on data products produced by TERAPIX and the Cambridge Astronomy Survey Unit on behalf of the UltraVISTA consortium. This work was supported by the Swiss National Science Foundation through the SNSF Professorship grant 157567 'Galaxy Build-up at Cosmic Dawn'. ES acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No. 694343). BG gratefully acknowledges the support of the Australian Research Council as the recipient of a Future Fellowship (FT140101202). MTS acknowledges support from a Royal Society Leverhulme Trust Senior Research Fellowship (LT150041). VS acknowledges support from the European Union's Seventh Frame-work programme under grant agreement 337595 (ERC Starting Grant, 'CoSMass'). OLF acknowledges support from the European Research Council Advanced Grant ERC-2010-AdG-268107-EARLY. Publisher Copyright: {\textcopyright} 2017 The Authors.",
year = "2017",
doi = "10.1093/MNRAS/STX1948",
language = "English",
volume = "472",
pages = "483--490",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",
}