A FIRST GLIMPSE INTO THE FAR-IR PROPERTIES OF HIGH-z UV-SELECTED GALAXIES: HERSCHEL/PACS OBSERVATIONS OF z {approx} 3 LBGS

Journal Article · Fri Sep 10 04:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/720/2/L185· OSTI ID:21452818

Magdis, G E; Elbaz, D; Hwang, H S; Daddi, E; Aussel, H ^[1]; Rigopoulou, D ^[2]; Altieri, B ^[3]; Andreani, P ^[4]; Berta, S; Foerster Schreiber, N; Genzel, R; Lutz, D ^[5]; Cava, A; Bongiovanni, A; Cepa, J ^[6]; Cimatti, A ^[7]; Dickinson, M ^[8]; Dominguez, H ^[9]; Huang, J -S ^[10]; Maiolino, R ^[11]

---

1. CEA, Laboratoire AIM, Irfu/SAp, F-91191 Gif-sur-Yvette (France)
2. Department of Astrophysics, Oxford University, Keble Road, Oxford OX1 3RH (United Kingdom)
3. European Space Astronomy Centre, Villafrance del Castillo (Spain)
4. ESO, Karl-Schwarzschild-Str. 2, D-85748 Garching (Germany)
5. Max-Planck-Institut fuer Extraterrestrische Physik (MPE), Postfach 1312, 85741 Garching (Germany)
6. Instituto de Astrofisica de Canarias, 38205 La Laguna (Spain)
7. Dipartimento di Astronomia, Universita di Padova, Vicolo dell'Osservatorio 3, 35122 Padova (Italy)
8. NOAO, 950 N. Cherry Avenue, Tucson, AZ 85719 (United States)
9. INAF-Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna (Italy)
10. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
11. INAF-Osservatorio Astronomico di Roma, via di Frascati 33, 00040 Monte Porzio Catone (Italy)

We present first insights into the far-IR properties for a sample of IRAC and MIPS 24 {mu}m detected Lyman break galaxies (LBGs) at z {approx} 3, as derived from observations in the northern field of the Great Observatories Origins Survey (GOODS-N) carried out with the PACS instrument on board the Herschel Space Observatory. Although none of our galaxies are detected by Herschel, we employ a stacking technique to construct, for the first time, the average spectral energy distribution (SED) of infrared luminous LBGs from UV to radio wavelengths. We derive a median IR luminosity of L {sub IR} = 1.6 x 10{sup 12} L {sub sun}, placing the population in the class of ultra-luminous infrared galaxies (ULIRGs). Complementing our study with existing multi-wavelength data, we put constraints on the dust temperature of the population and find that for their L {sub IR}, MIPS-LBGs are warmer than submillimeter-luminous galaxies while they fall in the locus of the L {sub IR}-T {sub d} relation of the local ULIRGs. This, along with estimates based on the average SED, explains the marginal detection of LBGs in current submillimeter surveys and suggests that these latter studies introduce a bias toward the detection of colder ULIRGs in the high-z universe, while missing high-z ULIRGS with warmer dust.

• OSTI ID: 21452818
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 720; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COSMOLOGY
DUSTS
ENERGY SPECTRA
EVOLUTION
GALACTIC EVOLUTION
GALAXIES
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RED SHIFT
SPECTRA
UNIVERSE