In and out star formation in z ~ 1.5 quiescent galaxies from rest-frame UV spectroscopy and the far-infrared
- Gobat, R
- Daddi, E.
- Strazzullo, V.
- Garilli, B.
- Mignoli, M.
- Ma, Z.
- Jin, S.
- Maraston, C.
- Magdis, G.
- Béthermin, M.
- Cappellari, M.
- Carollo, M.
- Feruglio, C.
- Onodera, M.
- Pozzetti, L.
- Renzini, A.
- Sargent, M.
- Valentino, F.
- Zanella, A.
- CIMATTI, ANDREA
- MORESCO, MICHELE ENNIO MARIA
DOIAbstract
We present a sample of 34 spectroscopically confirmed BzK-selected 1011 M quiescent galaxies (pBzK) in the COSMOS field. The targets were initially observed with VIMOS on the VLT to facilitate the calibration of the photometric redshifts of massive galaxies at z and 1:5. Here we describe the reduction and analysis of the data, and the spectrophotometric properties of these pBzK galaxies. In particular, using a spatially resolved median 2D spectrum, we find that the fraction of stellar populations with ages <1 Gyr is at least 3 times higher in the outer regions of the pBzK galaxies than in their cores. This results in a mild age gradient of age 0:4 Gyr over 6 kpc and suggests either the occurrence of widespread rejuvenation episodes or that ...
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