| タイトル | The Morphology of Passively Evolving Galaxies at Z-2 from HST/WFC3 in the Hubble Ultra Deep Field |
| 本文（外部サイト） | http://hdl.handle.net/2060/20090042714 |
| 著者（英） | Conselice, C.J.; Gardner, J.P.; Papovich, C.; Grogin, N.; Renzini, A.; Fontana, A.; Lotz, J.M.; Casertano, S.; Ferguson, H.; Moustakas, L.; Giavalisco, M.; Dickinson, M.; Cassata, P.; Lucas, R.A.; Koekemoer, A.; Salimbeni, S.; Guo, Yicheng; Straughn, A. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2009-11-05 |
| 言語 | eng |
| 内容記述 | We discuss near-IR images of six passive galaxies (SSFR< 10(exp -2)/Gyr) at redshift 1.3 < z < 2.4 with stellar mass M approx 10(exp 11) solar mass, selected from the Great Observatories Origins Deep Survey (GOODS), obtained with WFC3/IR and the Hubble Space Telescope (HST). These WFC3 images provide the deepest and highest angular resolution view of the optical rest-frame morphology of such systems to date. We find that the light profile of these; galaxies is generally regular and well described by a Sersic model with index typical of today's spheroids. We confirm the existence of compact and massive early-type galaxies at z approx. 2: four out of six galaxies have T(sub e) approx. 1 kpc or less. The WFC3 images achieve limiting surface brightness mu approx. 26.5 mag/sq arcsec in the F160W bandpass; yet there is no evidence of a faint halo in the five compact galaxies of our sample, nor is a halo observed in their stacked image. We also find very weak "morphological k-correction" in the galaxies between the rest-frame UV (from the ACS z band), and the rest-frame optical (WFC3 H band): the visual classification, Sersic indices and physical sizes of these galaxies are independent or only mildly dependent on the wavelength, within the errors. |
| NASA分類 | Astrophysics |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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