Dynamical masses of brightest cluster galaxies II: constraints on the stellar IMF

We use stellar and dynamical mass profiles, combined with a stellar population analysis, of 32 brightest cluster galaxies (BCGs) at redshifts of 0.05 \(\leq z \leq\) 0.30, to place constraints on their stellar Initial Mass Function (IMF). We measure the spatially-resolved stellar population properti...

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Bibliographic Details
Published in:arXiv.org 2020-11
Main Authors: Loubser, S I, Hoekstra, H, Babul, A, Bahé, Y M, Donahue, M
Format: Article
Language:English
Subjects:
Astronomical models
Constraints
Dark matter
Dynamic models
Galactic clusters
Galaxies
Gravitational lenses
Initial mass function
Stellar mass
Stellar populations
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Summary:We use stellar and dynamical mass profiles, combined with a stellar population analysis, of 32 brightest cluster galaxies (BCGs) at redshifts of 0.05 \(\leq z \leq\) 0.30, to place constraints on their stellar Initial Mass Function (IMF). We measure the spatially-resolved stellar population properties of the BCGs, and use it to derive their stellar mass-to-light ratios (\(\Upsilon_{\star \rm POP}\)). We find young stellar populations (\(
ISSN:2331-8422
DOI:10.48550/arxiv.2011.05350