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Old galaxies at high redshift

Abstract:
We review the observational data available on the class of galaxies known as Extremely Red Objects (EROs), and present new data on their apparent surface density, which now appears to be much higher than has previously been claimed. We discuss the division of these objects into two distinct groups: young galaxies with dramatic ongoing star formation and old galaxies with highly evolved stellar populations. Age-determination for the latter group using population synthesis models is complicated by an intrinsic degeneracy between the age and initial metallicity of the stellar populations.
Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author

Journal:
ASTROPHYSICAL AGES AND TIME SCALES More from this journal
Volume:
245
Pages:
569-574
Publication date:
2001-01-01
Event title:
Conference on Astrophysical Ages and Time Scales
ISBN:
1583810838

Keywords:
Pubs id:
pubs:24481
UUID:
uuid:aa23fdb3-a4cc-45cc-87b3-50e55b601778
Local pid:
pubs:24481
Source identifiers:
24481
Deposit date:
2012-12-19

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