CONSTRAINING SATELLITE GALAXY STELLAR MASS LOSS AND PREDICTING INTRAHALO LIGHT. I. FRAMEWORK AND RESULTS AT LOW REDSHIFT

We introduce a new technique that uses galaxy clustering to constrain how satellite galaxies lose stellar mass and contribute to the diffuse "intrahalo light" (IHL). We implement two models that relate satellite galaxy stellar mass loss to the detailed knowledge of subhalo dark matter mass...

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Bibliographic Details
Published in:The Astrophysical journal 2012-08, Vol.754 (2), p.1-14
Main Authors: WATSON, Douglas F, BERLIND, Andreas A, ZENTNER, Andrew R
Format: Article
Language:English
Subjects:
Astronomical models
Astronomy
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPARATIVE EVALUATIONS
Constraining
CORRELATION FUNCTIONS
COSMOLOGY
Dark matter
Delay
Earth, ocean, space
Exact sciences and technology
GALAXIES
GALAXY CLUSTERS
LUMINOSITY
MASS
Merging
NONLUMINOUS MATTER
POTENTIALS
RED SHIFT
Satellites
Stellar mass
UNIVERSE
VISIBLE RADIATION
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Summary:We introduce a new technique that uses galaxy clustering to constrain how satellite galaxies lose stellar mass and contribute to the diffuse "intrahalo light" (IHL). We implement two models that relate satellite galaxy stellar mass loss to the detailed knowledge of subhalo dark matter mass loss. Model 1 assumes that the fractional stellar mass loss of a galaxy, from the time of merging into a larger halo until the final redshift, is proportional to the fractional amount of dark matter mass loss of the subhalo it lives in. Model 2 accounts for a delay in the time that stellar mass is lost due to the fact that the galaxy resides deep in the potential well of the subhalo and the subhalo may experience dark matter mass loss for some time before the galaxy is affected. This demonstrates that a comparison to IHL measurements provides independent verification of our stellar mass loss models, as well as additional constraining power.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/754/2/90