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- W3098858114 endingPage "73" @default.
- W3098858114 startingPage "73" @default.
- W3098858114 abstract "Under the $Lambda$ cold dark matter ($Lambda$CDM) cosmological models, massive galaxies are expected to be larger in denser environments through frequent hierarchical mergers with other galaxies. Yet, observational studies of low-redshift early-type galaxies have shown no such trend, standing as a puzzle to solve during the past decade. We analyzed 73,116 early-type galaxies at $0.1leq z < 0.15$, adopting a robust nonparametric size measurement technique and extending the analysis to many massive galaxies. We find for the first time that local early-type galaxies heavier than $10^{11.2}M_{odot}$ show a clear environmental dependence in mass-size relation, in such a way that galaxies are as much as 20-40% larger in densest environments than in underdense environments. Splitting the sample into the brightest cluster galaxies (BCGs) and non-BCGs does not affect the result. This result agrees with the $Lambda$CDM cosmological simulations and suggests that mergers played a significant role in the growth of massive galaxies in dense environments as expected in theory." @default.
- W3098858114 created "2020-11-23" @default.
- W3098858114 creator A5003216011 @default.
- W3098858114 creator A5030810934 @default.
- W3098858114 creator A5059460149 @default.
- W3098858114 date "2017-01-04" @default.
- W3098858114 modified "2023-09-27" @default.
- W3098858114 title "MASSIVE GALAXIES ARE LARGER IN DENSE ENVIRONMENTS: ENVIRONMENTAL DEPENDENCE OF MASS–SIZE RELATION OF EARLY-TYPE GALAXIES" @default.
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