Identifying the progenitor set of present-day early-type galaxies: a view from the standard model

Details Identifying the progenitor set of present-day early-type galaxies: a view from the standard model Identifying the progenitor set of present-day early-type galaxies: a view from the standard model

2010-01-13

arxiv.org/abs/1001.2212v1

A&A, 2009, 503, 445

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Published in A&A, 2009, 503, 445. The article can be downloaded at: http://adsabs.harvard.edu/abs/2009A%26A...503..445K

Scientific paper

10.1051/0004-6361/200810483

We present a comprehensive theoretical study, using a semi-analytical model within the standard LCDM framework, of the photometric properties of the progenitors of present-day early-type galaxies in the redshift range 00.7) spirals have 75-95% chance of being an early-type progenitor, while the corresponding probability for large blue spirals (M_B<-21.5, B-V<0.7) is 50-75%. The prescriptions developed here can be used to address, from the perspective of the standard model, the issue of `progenitor bias', whereby the exclusion of late-type progenitors in observational studies can lead to inaccurate conclusions regarding the evolution of the early-type population over cosmic time. (abridged)

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