Bibcode
Gruppioni, C.; Pozzi, F.; Rodighiero, G.; Delvecchio, I.; Berta, S.; Pozzetti, L.; Zamorani, G.; Andreani, P.; Cimatti, A.; Ilbert, O.; Le Floc'h, E.; Lutz, D.; Magnelli, B.; Marchetti, L.; Monaco, P.; Nordon, R.; Oliver, S.; Popesso, P.; Riguccini, L.; Roseboom, I.; Rosario, D. J.; Sargent, M.; Vaccari, M.; Altieri, B.; Aussel, H.; Bongiovanni, A.; Cepa, J.; Daddi, E.; Domínguez-Sánchez, H.; Elbaz, D.; Förster Schreiber, N.; Genzel, R.; Iribarrem, A.; Magliocchetti, M.; Maiolino, R.; Poglitsch, A.; Pérez García, A.; Sanchez-Portal, M.; Sturm, E.; Tacconi, L.; Valtchanov, I.; Amblard, A.; Arumugam, V.; Bethermin, M.; Bock, J.; Boselli, A.; Buat, V.; Burgarella, D.; Castro-Rodríguez, N.; Cava, A.; Chanial, P.; Clements, D. L.; Conley, A.; Cooray, A.; Dowell, C. D.; Dwek, E.; Eales, S.; Franceschini, A.; Glenn, J.; Griffin, M.; Hatziminaoglou, E.; Ibar, E.; Isaak, K.; Ivison, R. J.; Lagache, G.; Levenson, L.; Lu, N.; Madden, S.; Maffei, B.; Mainetti, G.; Nguyen, H. T.; O'Halloran, B.; Page, M. J.; Panuzzo, P.; Papageorgiou, A.; Pearson, C. P.; Pérez-Fournon, I.; Pohlen, M.; Rigopoulou, D.; Rowan-Robinson, M.; Schulz, B.; Scott, D.; Seymour, N.; Shupe, D. L.; Smith, A. J.; Stevens, J. A.; Symeonidis, M.; Trichas, M.; Tugwell, K. E.; Vigroux, L.; Wang, L.; Wright, G.; Xu, C. K.; Zemcov, M.; Bardelli, S.; Carollo, M.; Contini, T.; Le Févre, O.; Lilly, S.; Mainieri, V. et al.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 432, Issue 1, p.23-52
Fecha de publicación:
6
2013
Número de citas
374
Número de citas referidas
335
Descripción
We exploit the deep and extended far-IR data sets (at 70, 100 and 160
μm) of the Herschel Guaranteed Time Observation (GTO) PACS
Evolutionary Probe (PEP) Survey, in combination with the Herschel
Multi-tiered Extragalactic Survey data at 250, 350 and 500 μm, to
derive the evolution of the rest-frame 35-, 60-, 90- and total infrared
(IR) luminosity functions (LFs) up to z ˜ 4. We detect very strong
luminosity evolution for the total IR LF (LIR ∝ (1 +
z)3.55 ± 0.10 up to z ˜ 2, and ∝ (1 +
z)1.62 ± 0.51 at 2 < z ≲ 4) combined with a
density evolution (∝(1 + z)-0.57 ± 0.22 up to z
˜ 1 and ∝ (1 + z)-3.92 ± 0.34 at 1 < z
≲ 4). In agreement with previous findings, the IR luminosity
density (ρIR) increases steeply to z ˜ 1, then
flattens between z ˜ 1 and z ˜ 3 to decrease at z ≳ 3.
Galaxies with different spectral energy distributions, masses and
specific star formation rates (SFRs) evolve in very different ways and
this large and deep statistical sample is the first one allowing us to
separately study the different evolutionary behaviours of the individual
IR populations contributing to ρIR. Galaxies occupying
the well-established SFR-stellar mass main sequence (MS) are found to
dominate both the total IR LF and ρIR at all redshifts,
with the contribution from off-MS sources (≥0.6 dex above MS) being
nearly constant (˜20 per cent of the total ρIR) and
showing no significant signs of increase with increasing z over the
whole 0.8 < z < 2.2 range. Sources with mass in the range 10 ≤
log(M/M⊙) ≤ 11 are found to dominate the total IR LF,
with more massive galaxies prevailing at the bright end of the high-z
(≳2) LF. A two-fold evolutionary scheme for IR galaxies is
envisaged: on the one hand, a starburst-dominated phase in which the
Super Massive Black Holes (SMBH) grows and is obscured by dust (possibly
triggered by a major merging event), is followed by an AGN-dominated
phase, then evolving towards a local elliptical. On the other hand,
moderately star-forming galaxies containing a low-luminosity AGN have
various properties suggesting they are good candidates for systems in a
transition phase preceding the formation of steady spiral galaxies.
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