Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/93864

Title

The nature of faint galaxies from the medium deep survey and other deep HST images

Author(s)

Windhorst, R. A.;  Driver, S. P.;  Ostrander, E. J.;  Mutz, S. B.;  Schmidtke, P. C.;  Griffiths, R. E.;  Ratnatunga, K. U.;  Casertano, S.;  Im, M.;  Neuschaefer, L. W.;  Ellis, R. S.;  Gilmore, G. F.;  Elson, R. A. W.;  Glazebrook, K.;  Santiago, B.;  Keel, W. C.;  Koo, D. C.;  Illingworth, G. D.;  Forbes, Duncan A.;  Phillips, A. C.;  Green, R. F.;  Huchra, J. P.;  Tyson, A. J.

Abstract

High-resolution HST images with WF/PC and WFPC2 have allowed the morphological classification of faint field galaxies to ZSM ~ 24.25 mag (Bj ~ 26.0). We find that the differential galaxy counts at these faint magnitudes are dominated by late-type spiral/Irregular galaxies. The elliptical and early-type spirals remain roughly consistent with the no-evolution predictions for these types, and firmly place the epoch of giant galaxy formation to beyond z ~ 0.8. Close examination of the late-type spiral/Irregular population supports a picture in which recent star-formation has occurred in a significant fraction (35 %) of this population, and that the remainder are lower redshift objects under-represented in the local surveys.

Publication type

Conference paper

Source

Lecture Notes in Physics: proceedings of the Workshop on Galaxies in the Young Universe, Tegernsee, Germany, 22-28 September 1994 / H. Hippelein, K. Meisenheimer and H. Roser (eds.), Vol. 463 (1996), pp. 265-272

Publication year

1996

Keyword(s)

Faint galaxies;  Galaxies;  HST;  Hubble Space Telescope;  Irregular galaxies;  Spiral galaxies

Publisher

Springer

ISSN

1616-6361

ISBN

9783540605867, 354060586X

Publisher URL

http://dx.doi.org/10.1007/BFb0102387

Copyright

Copyright © 1995 Springer-Verlag Berlin Heidelberg.

Peer reviewed