Grecco A. Oyarzun
SDSS-IV MaNGA: How the stellar populations of passive central galaxies depend on stellar and halo mass
Oyarzun, Grecco A.; Bundy, Kevin; Westfall, Kyle B.; Tinker, Jeremy L.; Belfiore, Francesco; Argudo-Fernandez, Maria; Zheng, Zheng; Conroy, Charlie; Masters, Karen L.; Wake, David; Law, David R.; McDermid, Richard M.; Aragon-Salamanca, Alfonso; Parikh, Taniya; Yan, Renbin; Bershady, Matthew; Sanchez, Sebastian F.; Andrews, Brett H.; Fernández-Trincado, Jose G.; Lane, Richard R.; Bizyaev, D.; Fraser Boardman, Nicholas; Lacerna, Ivan; Brownstein, J.R.; Drory, Niv; Zhang, Kai
Authors
Kevin Bundy
Kyle B. Westfall
Jeremy L. Tinker
Francesco Belfiore
Maria Argudo-Fernandez
Zheng Zheng
Charlie Conroy
Karen L. Masters
David Wake
David R. Law
Richard M. McDermid
Professor ALFONSO ARAGON-SALAMANCA ALFONSO.ARAGON@NOTTINGHAM.AC.UK
Professor of Astronomy
Taniya Parikh
Renbin Yan
Matthew Bershady
Sebastian F. Sanchez
Brett H. Andrews
Jose G. Fernández-Trincado
Richard R. Lane
D. Bizyaev
Nicholas Fraser Boardman
Ivan Lacerna
J.R. Brownstein
Niv Drory
Kai Zhang
Abstract
We analyze spatially resolved and co-added SDSS-IV MaNGA spectra with signal-to-noise ratio ∼100 from 2200 passive central galaxies (z ∼ 0.05) to understand how central galaxy assembly depends on stellar mass (M*) and halo mass (Mh). We control for systematic errors in Mh by employing a new group catalog from Tinker and the widely used Yang et al. catalog. At fixed M*, the strengths of several stellar absorption features vary systematically with Mh. Completely model-free, this is one of the first indications that the stellar populations of centrals with identical M* are affected by the properties of their host halos. To interpret these variations, we applied full spectral fitting with the code alf. At fixed M*, centrals in more massive halos are older, show lower [Fe/H], and have higher [Mg/Fe] with 3.5σ confidence. We conclude that halos not only dictate how much M* galaxies assemble but also modulate their chemical enrichment histories. Turning to our analysis at fixed Mh, high-M* centrals are older, show lower [Fe/H], and have higher [Mg/Fe] for Mh > 1012 h−1 M⊙ with confidence >4σ. While massive passive galaxies are thought to form early and rapidly, our results are among the first to distinguish these trends at fixed Mh. They suggest that high-M* centrals experienced unique early formation histories, either through enhanced collapse and gas fueling or because their halos were early forming and highly concentrated, a possible signal of galaxy assembly bias.
Journal Article Type | Article |
---|---|
Acceptance Date | May 15, 2022 |
Online Publication Date | Jul 6, 2022 |
Publication Date | Jul 6, 2022 |
Deposit Date | May 30, 2022 |
Publicly Available Date | Jul 11, 2022 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Electronic ISSN | 1538-4357 |
Peer Reviewed | Peer Reviewed |
Volume | 933 |
Issue | 1 |
Article Number | 88 |
DOI | https://doi.org/10.3847/1538-4357/ac7048 |
Keywords | Space and Planetary Science; Astronomy and Astrophysics |
Public URL | https://nottingham-repository.worktribe.com/output/8305432 |
Publisher URL | https://iopscience.iop.org/article/10.3847/1538-4357/ac7048 |
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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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