dc.contributor.author | McLure, R. J. | |
dc.contributor.author | Dunlop, J. S. | |
dc.contributor.author | Cullen, F. | |
dc.contributor.author | Bourne, N. | |
dc.contributor.author | Best, P. N. | |
dc.contributor.author | Khochfar, S. | |
dc.contributor.author | Bowler, R. A. A. | |
dc.contributor.author | Biggs, A. D. | |
dc.contributor.author | Geach, J. E. | |
dc.contributor.author | Scott, D. | |
dc.contributor.author | Michalowski, M. J. | |
dc.contributor.author | Rujopakarn, W. | |
dc.contributor.author | Kampen, E. van | |
dc.contributor.author | Kirkpatrick, A. | |
dc.contributor.author | Pope, A. | |
dc.date.accessioned | 2018-09-05T00:13:03Z | |
dc.date.available | 2018-09-05T00:13:03Z | |
dc.date.issued | 2018-05-21 | |
dc.identifier.citation | McLure , R J , Dunlop , J S , Cullen , F , Bourne , N , Best , P N , Khochfar , S , Bowler , R A A , Biggs , A D , Geach , J E , Scott , D , Michalowski , M J , Rujopakarn , W , Kampen , E V , Kirkpatrick , A & Pope , A 2018 , ' Dust attenuation in 2 <z <3 star-forming galaxies from deep ALMA observations of the Hubble Ultra Deep Field ' , Monthly Notices of the Royal Astronomical Society , vol. 476 , no. 3 , pp. 3991-4006 . https://doi.org/10.1093/mnras/sty522 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1709.06102v2 | |
dc.identifier.uri | http://hdl.handle.net/2299/20518 | |
dc.description | 17 pages, 7 figures, accepted version to be published in MNRAS | |
dc.description.abstract | We present the results of a new study of the relationship between infrared excess (IRX ≡ L IR/L UV), ultraviolet (UV) spectral slope (β) and stellar mass at redshifts 2 < z < 3, based on a deep Atacama Large Millimeter Array (ALMA) 1.3-mm continuum mosaic of the Hubble Ultra Deep Field. Excluding the most heavily obscured sources, we use a stacking analysis to show that z ≃ 2.5 star-forming galaxies in the mass range 9.25 ≤ log(M*/M ⊙) ≤ 10.75 are fully consistent with the IRX-β relation expected for a relatively grey attenuation curve, similar to the commonly adopted Calzetti law. Based on a large, mass-complete sample of 2 ≤ z ≤ 3 star-forming galaxies drawn frommultiple surveys, we proceed to derive a new empirical relationship between β and stellar mass, making it possible to predict UV attenuation (A1600) and IRX as a function of stellar mass, for any assumed attenuation law. Once again, we find that z ≃ 2.5 star-forming galaxies follow A1600-M* and IRX-M* relations consistent with a relatively grey attenuation law, and find no compelling evidence that star-forming galaxies at this epoch follow a reddening law as steep as the Small Magellanic Cloud (SMC) extinction curve. In fact, we use a simple simulation to demonstrate that previous determinations of the IRX-β relation may have been biased towards low values of IRX at red values of β, mimicking the signature expected for an SMC-like dust law. We show that this provides a plausible mechanism for reconciling apparently contradictory results in the literature and that, based on typical measurement uncertainties, stellar mass provides a cleaner prediction of UV attenuation than β. Although the situation at lower stellar masses remains uncertain, we conclude that for 2 < z < 3 star-forming galaxies with log(M*/M ⊙) ≥ 9.75, both the IRX-β and IRX-M* relations are well described by a Calzetti-like attenuation law. | en |
dc.format.extent | 16 | |
dc.format.extent | 853008 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Galaxies: evolution | |
dc.subject | Galaxies: high-redshift | |
dc.subject | Galaxies: star formation | |
dc.subject | Galaxies: starburst | |
dc.subject | Submillimetre: galaxies | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Dust attenuation in 2<z<3 star-forming galaxies from deep ALMA observations of the Hubble Ultra Deep Field | en |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85047996106&partnerID=8YFLogxK | |
dc.identifier.url | https://arxiv.org/abs/1709.06102 | |
rioxxterms.versionofrecord | 10.1093/mnras/sty522 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |