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    Recovering the Properties of High-redshift Galaxies with Different JWST Broadband Filters

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    Bisigello_2017_ApJS_231_3.pdf
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    Author
    Bisigello, L. cc
    Caputi, K. I. cc
    Colina, L.
    Fèvre, O. Le cc
    Nørgaard-Nielsen, H. U.
    Pérez-González, P. G.
    Werf, P. van der cc
    Ilbert, O. cc
    Grogin, Norman A. cc
    Koekemoer, A. cc
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2017-07-07
    Keywords
    galaxies: high-redshift
    galaxies: photometry
    galaxies: fundamental parameters
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    Recovering the Properties of High-redshift Galaxies with Different JWST Broadband Filters 2017, 231 (1):3 The Astrophysical Journal Supplement Series
    Journal
    The Astrophysical Journal Supplement Series
    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
    Imaging with the James Webb Space Telescope (JWST) will allow observations of the bulk of distant galaxies at the epoch of reionization. The recovery of their properties, such as age, color excess E(B-V), specific star formation rate (sSFR), and stellar mass, will mostly rely on spectral energy distribution fitting, based on the data provided by JWST's two imager cameras, namely the Near Infrared Camera (NIRCam) and the Mid Infrared Imager (MIRI). In this work we analyze the effect of choosing different combinations of NIRCam and MIRI broadband filters, from 0.6 to 7.7 mu m, on the recovery of these galaxy properties. We performed our tests on a sample of 1542 simulated galaxies, with known input properties, at z = 7-10. We found that, with only eight NIRCam broadbands, we can recover the galaxy age within 0.1 Gyr and the color excess within 0.06 mag for 70% of the galaxies. Additionally, the stellar masses and sSFR are recovered within 0.2 and 0.3 dex, respectively, at z = 7-9. Instead, at z = 10, no NIRCam band traces purely the lambda > 4000 angstrom regime and the percentage of outliers in stellar mass (sSFR) increases by > 20% (> 90%), in comparison to z = 9. The MIRI F560W and F770W bands are crucial to improve the stellar mass and the sSFR estimation at z = 10. When nebular emission lines are present, deriving correct galaxy properties is challenging at any redshift and with any band combination. In particular, the stellar mass is systematically overestimated in up to 0.3 dex on average with NIRCam data alone and including MIRI observations only marginally improves the estimation.
    ISSN
    1538-4365
    DOI
    10.3847/1538-4365/aa7a14
    Version
    Final published version
    Sponsors
    Nederlandse Onderzoekschool voor de Astronomie (NOVA); European Research Council through the award of the Consolidator Grant [681627-BUILDUP]; European Research Council [268107-EARLY]; Spanish Government MINECO [AYA2012-31277, AYA2015-70815-ERC, AAYA2012-32295]
    Additional Links
    http://stacks.iop.org/0067-0049/231/i=1/a=3?key=crossref.18bfe6057fa2463d7f54a369752f41db
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4365/aa7a14
    Scopus Count
    Collections
    UA Faculty Publications

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