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The Quest for Protogalaxies

Djorgovski, S. G. (1996) The Quest for Protogalaxies. In: New Light on Galaxy Evolution. International Astronomical Union. No.171. Springer , Dordrecht, pp. 277-286. ISBN 978-0-7923-3976-2.

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The current state and the future prospects of searches for protogalaxies (PGs) are reviewed. Many high-redshift objects are now known, mostly associated in some way with AGN, and at least some of them may be young galaxies. Quasars at z > 4 and high-z quasar pairs may mark galaxy formation sites. Deep field surveys for Lyα luminous galaxies powered by star formation alone have failed so far to reveal a large population of such objects, and the observed limits are in conflict with simple model predictions by three orders of magnitude. Some extinction by dust can account for this. However, strong limits from COBE place severe constraints on models of completely obscured PGs. New searches in the near IR are now beginning to probe the relevant line flux and number density regime, and first interesting PG candidates are being discovered. Searches from mid-IR to mm wavelengths would complement these efforts.

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Djorgovski, S. G.0000-0002-0603-3087
Additional Information:© 1996 Springer Science+Business Media Dordrecht. I wish to thank my collaborators, and in particular D. Thompson, M. Pahre, and J. Kennefick, and to the staff of Palomar and W. M. Keck observatories for their expert help. This work was supported in part by the NSF PYI award AST-9157412, and the Bressler Foundation.
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Bressler FoundationUNSPECIFIED
Series Name:International Astronomical Union
Issue or Number:171
Record Number:CaltechAUTHORS:20190724-080635149
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97378
Deposited By: Tony Diaz
Deposited On:24 Jul 2019 16:32
Last Modified:16 Nov 2021 17:31

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