Arid
DOI10.1093/mnras/stt2468
The ultraviolet to far-infrared spectral energy distribution of star-forming galaxies in the redshift desert
Oteo, I.1,2; Bongiovanni, A.1,2,3; Magdis, G.4; Perez-Garcia, A. M.1,2,3; Cepa, J.1,2; Dominguez Sanchez, H.1,2; Ederoclite, A.5; Sanchez-Portal, M.3,6; Pintos-Castro, I.1,2,7
通讯作者Oteo, I.
来源期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
EISSN1365-2966
出版年2014
卷号439期号:2页码:1337-1363
英文摘要

We analyse the rest-frame ultraviolet (UV) to near-infrared (near-IR) spectral energy distribution (SED) of Lyman-break galaxies (LBGs), star-forming (SF) BzK (sBzK) and UV-selected galaxies at 1.5 less than or similar to z less than or similar to 2.5 in the COSMOS, GOODS-N and GOODS-S fields. Additionally, we complement the multiwavelength coverage of the galaxies located in the GOODS fields with deep far-infrared (FIR) data taken from the GOODS-Herschel project. According to their best-fitting SED-derived properties we find that, because of their selection criterion involving UV measurements, LBGs tend to be UV-brighter and bluer and have a less prominent Balmer break (i.e. are younger) and higher dust-corrected total star-formation rate (SFR) than sBzK galaxies. In this way, sBzK galaxies represent the general population of SF galaxies at z similar to 2 better than LBGs. In a colour-mass diagram, LBGs at z similar to 2 are mostly located over the blue cloud, although galaxies with higher age, higher dust attenuation and redder UV continuum slope deviate to the green valley and red sequence. Furthermore, for a given stellar mass, LBGs tend to have bluer optical colours than sBzK and UV-selected galaxies. We find clean Photodetector Array Camera and Spectrometer (PACS: 100- or 160-mu m) individual detections for a subsample of 48 LBGs, 89 sBzK and 91 UV-selected galaxies that measure their dust emission directly. Their SFRtotal = SFRUV + SFRIR cannot be recovered with the dust-correction factors derived from their continuum slope and the infrared excess (IRX)-beta relations for local starbursts, similar to what happens at higher redshifts. This might have implications, for example, in the definition of the main sequence (MS) at z similar to 2, which is sensitive to the dust-correction factors adopted. In an SFR-mass diagram, PACS-detected galaxies are located above the Daddi et al. MS and thus their star formation is probably driven by starbursts. This is in agreement with the shape of their IR SEDs. PACS-detected galaxies with redder UV continuum slope and higher stellar mass are more attenuated. We find that, for a given UV continuum slope, the dustiest galaxies at higher redshifts are more attenuated and that for a given stellar mass the dustiest galaxies at higher redshifts have stronger FIR emission. This suggests an evolution of their dust properties. However, we do not find significant evolution in the relation between dust attenuation and stellar mass with redshift, at least at z < 2.5. There is a subpopulation of 17, 26 and 27 LBGs, sBzK and UV-selected galaxies, respectively, that are detected in any of the Spectral and Photometric Imaging REceiver (SPIRE: 250-, 350- and 500-mu m) bands. We speculate that this sample of SPIRE-detected LBGs is the bridging population between submillimetre galaxies and LBGs.


英文关键词galaxies: evolution galaxies: high-redshift galaxies: star formation infrared: galaxies ultraviolet: galaxies
类型Article
语种英语
国家Spain ; England
收录类别SCI-E
WOS记录号WOS:000334114000010
WOS关键词LYMAN-BREAK GALAXIES ; DEEP FIELD-SOUTH ; SIMILAR-TO 3 ; UV-SELECTED GALAXIES ; RELEASE SCIENCE OBSERVATIONS ; DUST ATTENUATION PROPERTIES ; FORMATION RATE DENSITY ; STELLAR MASS DENSITY ; DIGITAL SKY SURVEY ; LY-ALPHA EMITTERS
WOS类目Astronomy & Astrophysics
WOS研究方向Astronomy & Astrophysics
来源机构University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/183914
作者单位1.Inst Astrofis Canarias, E-38200 Tenerife, Spain;
2.Univ La Laguna, Dept Astrofis, E-38205 Tenerife, Spain;
3.Asociac ASPID, Tenerife, Spain;
4.Univ Oxford, Dept Phys, Oxford OX1 3RH, England;
5.Ctr Estudios Fis Cosmos Aragon, E-44001 Teruel, Spain;
6.Herschel Sci Ctr ESAC, Villafranca Del Castillo, Spain;
7.INTA CSIC, Ctr Astrobiol, E-28691 Madrid, Spain
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GB/T 7714
Oteo, I.,Bongiovanni, A.,Magdis, G.,et al. The ultraviolet to far-infrared spectral energy distribution of star-forming galaxies in the redshift desert[J]. University of Oxford,2014,439(2):1337-1363.
APA Oteo, I..,Bongiovanni, A..,Magdis, G..,Perez-Garcia, A. M..,Cepa, J..,...&Pintos-Castro, I..(2014).The ultraviolet to far-infrared spectral energy distribution of star-forming galaxies in the redshift desert.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,439(2),1337-1363.
MLA Oteo, I.,et al."The ultraviolet to far-infrared spectral energy distribution of star-forming galaxies in the redshift desert".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 439.2(2014):1337-1363.
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