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    Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267

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    Tucker_2017_AJ_154_113.pdf
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    Description:
    FInal Published Version
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    Author
    Tucker, Evan cc
    Walker, Matthew G. cc
    Mateo, Mario
    Olszewski, Edward W.
    Bailey, John I.
    Crane, J. D. cc
    Shectman, Stephen A.
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2017-08-29
    Keywords
    galaxies: clusters: individual (Abell 267)
    galaxies: general
    techniques: imaging spectroscopy
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267 2017, 154 (3):113 The Astronomical Journal
    Journal
    The Astronomical Journal
    Rights
    © 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
    1538-3881
    DOI
    10.3847/1538-3881/aa8360
    Version
    Final published version
    Sponsors
    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.42b94ffa612544cfdf233e53c6098657
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/aa8360
    Scopus Count
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    UA Faculty Publications

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