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Galaxies at Very High Redshifts (z > 1)

Djorgovski, S. (1987) Galaxies at Very High Redshifts (z > 1). In: Nearly Normal Galaxies - From the Planck Time to the Present. Springer , New York, NY, pp. 290-299. ISBN 978-1-4612-9145-9.

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Observational cosmology is partly based upon wishful thinking. (I am not even going to hint on what is the theoretical cosmology based.) This is, perhaps, inevitable: most, if not all, cosmological tests seem to require idealized test particles or conditions, and there is much skill in coming up with a setup which is the least unrealistically oversimplified. Some classical tests, such as the m vs. z diagram, require the “standard candles”, that is, sources of light whose intrinsic behavior is well understood, and which span a large baseline in redshift. QSO’s are much too finicky, variable, and poorly understood to serve in this role; and ever since the days of Hubble, giant elliptical galaxies were a favorite choice. They seem to qualify, since they are luminous, and can be spotted at high redshifts; this is made easier by the facts that they are often found in rich clusters, and sometimes have powerful radio lobes. Moreover, here and now (z ≃ 0) they seem to live apparently clean and quiet lives, with no ongoing star formation, no optically thick dust, etc. On a closer look this simplicity disappears, but we cannot be too picky now.

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Djorgovski, S.0000-0002-0603-3087
Additional Information:© 1987 Springer-Verlag New York Inc. I would like to thank to my great and hard-working collaborators, whose work and ideas were freely used in this review; in particular, to Hy Spinrad, Pat McCarthy, Mark Dickinson, Michael Strauss, and many others. Thanks are also due to the staff of Kitt Peak, Lick, MMT, and CFHT observatories. Most of the work described here was completed while I was at the Berkeley Astronomy Department. Partial support from Harvard University is gratefully acknowledged.
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Harvard UniversityUNSPECIFIED
Subject Keywords:Star Formation; Radio Galaxy; High Redshift; Star Formation Rate; Galaxy Evolution
Record Number:CaltechAUTHORS:20190730-132000680
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97522
Deposited By: Tony Diaz
Deposited On:01 Aug 2019 20:34
Last Modified:16 Nov 2021 17:32

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