Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267
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Author
Tucker, Evan
Walker, Matthew G.

Mateo, Mario
Olszewski, Edward W.
Bailey, John I.
Crane, J. D.

Shectman, Stephen A.
Affiliation
Univ Arizona, Steward ObservIssue Date
2017-08-29Keywords
galaxies: clusters: individual (Abell 267)galaxies: general
techniques: imaging spectroscopy
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IOP PUBLISHING LTDCitation
Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267 2017, 154 (3):113 The Astronomical JournalJournal
The Astronomical JournalRights
© 2017. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight of the galaxy cluster Abell 267 (z similar to 0.23). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify the redshift (v(los)/c) and characteristic age, metallicity ([Fe/H]), alpha-abundance ([alpha/Fe]), and internal velocity dispersion (sigma(int)) for individual galaxies. Parameter estimates derived from our 1.5 hr observation of A267 have median random errors of sigma(vlos) = 20 km s(-1), sigma(Age) = 1.2 Gyr, sigma([Fe/H]) = 0.11 dex, sigma([alpha/Fe]) = 0.07 dex, and sigma(sigma int) = 20 km s(-1). In a companion paper, we use these results to model the structure and internal kinematics of A267.ISSN
1538-3881Version
Final published versionSponsors
National Science Foundation [AST-1313045, AST-1412999]; NSF [AST-1312997, AST-1313006]Additional Links
http://stacks.iop.org/1538-3881/154/i=3/a=113?key=crossref.42b94ffa612544cfdf233e53c6098657ae974a485f413a2113503eed53cd6c53
10.3847/1538-3881/aa8360