Lyman break and ultraviolet-selected galaxies at z ∼ 1-II. PACS 100 μm/160 μm FIR detections

被引：15

作者：

Oteo, I. ^{[1
,2
]}

Magdis, G. ^{[3
]}

Bongiovanni, A. ^{[1
,2
,4
]}

Perez-Garcia, A. M. ^{[1
,2
,4
]}

Cepa, J. ^{[1
,2
]}

Cedres, B. ^{[1
,2
]}

Ederoclite, A. ^{[5
]}

Sanchez-Portal, M. ^{[4
,6
]}

Aguerri, J. A. L. ^{[1
,2
]}

Alfaro, E. J. ^{[7
]}

Altieri, B. ^{[8
]}

Andreani, P. ^{[9
,10
]}

Aparicio-Villegas, T. ^{[7
,11
]}

Aussel, H. ^{[12
]}

Benitez, N. ^{[7
]}

Berta, S. ^{[13
]}

Broadhurst, T. ^{[14
]}

Cabrera-Cano, J. ^{[15
]}

Castander, F. J. ^{[16
]}

Cervino, M. ^{[1
,7
]}

Cimatti, A. ^{[17
]}

Cristobal-Hornillos, D. ^{[5
,7
]}

Daddi, E. ^{[18
]}

Elbaz, D. ^{[18
]}

Fernandez-Soto, A. ^{[19
,20
]}

Schreiber, N. Foerster ^{[13
]}

Genzel, R. ^{[13
]}

Gonzalez-Delgado, R. M. ^{[7
]}

Husillos, C. ^{[7
]}

Infante, L. ^{[21
]}

Le Floc'h, E. ^{[18
]}

Lutz, D. ^{[13
]}

Magnelli, B. ^{[13
]}

Maiolino, R. ^{[22
]}

Marquez, I. ^{[7
]}

Martinez, V. J. ^{[23
,24
]}

Masegosa, J. ^{[7
]}

Matute, I. ^{[7
]}

Moles, M. ^{[5
]}

Molino, A. ^{[7
]}

del Olmo, A. ^{[7
]}

Perea, J. ^{[7
]}

Perez-Martinez, R. ^{[25
]}

Pintos-Castro, I. ^{[1
,2
,26
]}

Poglitsch, A. ^{[13
]}

Polednikova, J. ^{[1
,2
]}

Popesso, P. ^{[13
]}

Povic, M. ^{[7
]}

Pozzi, F. ^{[17
]}

Prada, F. ^{[7
]}

机构：

[1] Inst Astrofis Canarias, E-38200 Tenerife, Spain

[2] Univ La Laguna, Dept Astrofis, E-38205 Tenerife, Spain

[3] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[4] Asociac ASPID, Tenerife, Spain

[5] Ctr Estudios Fis Cosmos Aragon, E-44001 Teruel, Spain

[6] Herschel Sci Ctr ESAC, Villafranca Del Castillo, Spain

[7] Inst Astrofis Andalucia CSIC, E-18008 Granada, Spain

[8] European Space Astron Ctr, Herschel Sci Ctr, E-28691 Madrid, Spain

[9] ESO, D-85748 Garching, Germany

[10] INAF Osservatorio Astron Trieste, I-34143 Trieste, Italy

[11] Observ Nacl MCT, BR-20921400 Rio De Janeiro, Brazil

[12] Univ Paris Diderot, Lab AIM Paris Saclay, CEA DSM Irfu CNRS, CE Saclay, F-91191 Gif Sur Yvette, France

[13] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

[14] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[15] Univ Seville, Fac Fis, Dept Fis Atom Mol & Nucl, Seville, Spain

[16] IEEC CSIC, Inst Ciencies Espai, Barcelona, Spain

[17] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy

[18] Univ Paris Diderot, CEA Saclay, Lab AIM, CEA DSM CNRS,IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France

[19] CSIC UC, Inst Fis Cantabria, E-39005 Santander, Spain

[20] Univ Valencia, Unidad Asociada Observ Astronm, IFCA CSIC, E-46980 Paterna, Spain

[21] Ponticia Univ Catolica, Dept Astron, Santiago, Chile

[22] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[23] Univ Valencia, Observat Astronm, E-46980 Paterna, Spain

[24] Univ Valencia, Dept Astron & Astrofis, E-46100 Burjassot, Spain

[25] XMM Newton Sci Operat Ctr ESAC, Villafranca Del Castillo, Spain

[26] INTA CSIC, Ctr Astrobiol, E-28691 Madrid, Spain

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2013年 / 435卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

galaxies: evolution; galaxies: high-redshift; galaxies: star formation; infrared: galaxies; radio continuum: galaxies; ultraviolet: galaxies; STAR-FORMING GALAXIES; HIGH-REDSHIFT GALAXIES; FORMATION RATE DENSITY; DEEP FIELD SOUTH; FAR-INFRARED/RADIO CORRELATION; RELEASE SCIENCE OBSERVATIONS; UV LUMINOSITY FUNCTION; STELLAR MASS DENSITY; LY-ALPHA EMITTERS; DUST ATTENUATION;

D O I：

10.1093/mnras/stt1244

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work, we report the Photodetector Array Camera and Spectrometer (PACS) 100 mu m/160 mu m detections of a sample of 42 GALEX-selected and far-infrared (FIR)-detected Lyman break galaxies (LBGs) at z similar to 1 located in the Cosmic Evolution Survey (COSMOS) field and analyse their ultraviolet (UV) to FIR properties. The detection of these LBGs in the FIR indicates that they have a dust content high enough so that its emission can be directly detected. According to a spectral energy distribution (SED) fitting with stellar population templates to their UV-to-near-IR observed photometry, PACS-detected LBGs tend to be bigger (R-eff similar to 4.1 kpc), more massive [log (M-*/M-circle dot) similar to 10.7], dustier [E-s(B - V) similar to 0.40], redder in the UV continuum (beta similar to -0.60) and UV-brighter [log (L-UV/L-circle dot) similar to 10.1] than PACS-undetected LBGs. PACS-detected LBGs at z similar to 1 are mostly disc-like galaxies and are located over the green valley and red sequence of the colour-magnitude diagram of galaxies at their redshift. By using their UV and IR emission, we find that PACS-detected LBGs tend to be less dusty and have slightly higher total star formation rates (SFRs) than other PACS-detected UV-selected galaxies within the same redshift range. As a consequence of the selection effect due to the depth of the FIR observations employed, all our PACS-detected LBGs have total IR luminosities, L-IR, higher than 10(11) L-circle dot and thus are luminous IR galaxies. However, none of the PACS-detected LBGs are in the ultra-luminous IR galaxy (ULIRG) regime, L-IR >= 10(12) L-circle dot, where the FIR observations are complete. The finding of ULIRGs-LBGs at higher redshifts (z similar to 3) suggests an evolution of the FIR emission of LBGs with cosmic time. In an IRX-beta diagram, PACS-detected LBGs at z similar to 1 tend to be located around the relation for local starburst similarly to other UV-selected PACS-detected galaxies at the same redshift. Consequently, the dust-correction factors obtained with their UV continuum slope allow us to determine their total SFR, unlike at higher redshifts. However, the dust attenuation derived from UV to NIR SED fitting overestimates the total SFR for most of our PACS-detected LBGs in an age-dependent way: the overestimation factor is higher in younger galaxies. This is likely due to the typical degeneracy between dust attenuation and age in the SED fitting with synthetic templates and highlights the importance of the FIR measurements in the analysis of star-forming galaxies at intermediate redshifts.

引用

页码：158 / 186

页数：29

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