THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST: BAYESIAN EXTINCTION and STELLAR TOOL

Karl D. Gordon, Morgan Fouesneau, Heddy Arab, Kirill Tchernyshyov, Daniel R. Weisz, Julianne J. Dalcanton, Benjamin F. Williams, Eric F. Bell, Luciana Bianchi, Martha Boyer, Yumi Choi, Andrew Dolphin, Léo Girardi, David W. Hogg, Jason S. Kalirai, Maria Kapala, Alexia R. Lewis, Hans Walter Rix, Karin Sandstrom, Evan D. Skillman

    Research output: Contribution to journalArticle

    Abstract

    We present the Bayesian Extinction And Stellar Tool (BEAST), a probabilistic approach to modeling the dust extinguished photometric spectral energy distribution of an individual star while accounting for observational uncertainties common to large resolved star surveys. Given a set of photometric measurements and an observational uncertainty model, the BEAST infers the physical properties of the stellar source using stellar evolution and atmosphere models and constrains the line of sight extinction using a newly developed mixture model that encompasses the full range of dust extinction curves seen in the Local Group. The BEAST is specifically formulated for use with large multi-band surveys of resolved stellar populations. Our approach accounts for measurement uncertainties and any covariance between them due to stellar crowding (both systematic biases and uncertainties in the bias) and absolute flux calibration, thereby incorporating the full information content of the measurement. We illustrate the accuracy and precision possible with the BEAST using data from the Panchromatic Hubble Andromeda Treasury. While the BEAST has been developed for this survey, it can be easily applied to similar existing and planned resolved star surveys.

    Original languageEnglish (US)
    Article number104
    JournalAstrophysical Journal
    Volume826
    Issue number2
    DOIs
    StatePublished - Aug 1 2016

    Fingerprint

    Andromeda
    extinction
    stars
    dust
    stellar atmospheres
    crowding
    stellar evolution
    spectral energy distribution
    line of sight
    physical property
    physical properties
    calibration
    atmosphere
    curves

    Keywords

    • Analysis - methods: statistical
    • Dust
    • extinction
    • Galaxies: individual (M31)
    • Methods: data
    • Stars: fundamental parameters

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Gordon, K. D., Fouesneau, M., Arab, H., Tchernyshyov, K., Weisz, D. R., Dalcanton, J. J., ... Skillman, E. D. (2016). THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST: BAYESIAN EXTINCTION and STELLAR TOOL. Astrophysical Journal, 826(2), [104]. https://doi.org/10.3847/0004-637X/826/2/104

    THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST : BAYESIAN EXTINCTION and STELLAR TOOL. / Gordon, Karl D.; Fouesneau, Morgan; Arab, Heddy; Tchernyshyov, Kirill; Weisz, Daniel R.; Dalcanton, Julianne J.; Williams, Benjamin F.; Bell, Eric F.; Bianchi, Luciana; Boyer, Martha; Choi, Yumi; Dolphin, Andrew; Girardi, Léo; Hogg, David W.; Kalirai, Jason S.; Kapala, Maria; Lewis, Alexia R.; Rix, Hans Walter; Sandstrom, Karin; Skillman, Evan D.

    In: Astrophysical Journal, Vol. 826, No. 2, 104, 01.08.2016.

    Research output: Contribution to journalArticle

    Gordon, KD, Fouesneau, M, Arab, H, Tchernyshyov, K, Weisz, DR, Dalcanton, JJ, Williams, BF, Bell, EF, Bianchi, L, Boyer, M, Choi, Y, Dolphin, A, Girardi, L, Hogg, DW, Kalirai, JS, Kapala, M, Lewis, AR, Rix, HW, Sandstrom, K & Skillman, ED 2016, 'THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST: BAYESIAN EXTINCTION and STELLAR TOOL', Astrophysical Journal, vol. 826, no. 2, 104. https://doi.org/10.3847/0004-637X/826/2/104
    Gordon KD, Fouesneau M, Arab H, Tchernyshyov K, Weisz DR, Dalcanton JJ et al. THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST: BAYESIAN EXTINCTION and STELLAR TOOL. Astrophysical Journal. 2016 Aug 1;826(2). 104. https://doi.org/10.3847/0004-637X/826/2/104
    Gordon, Karl D. ; Fouesneau, Morgan ; Arab, Heddy ; Tchernyshyov, Kirill ; Weisz, Daniel R. ; Dalcanton, Julianne J. ; Williams, Benjamin F. ; Bell, Eric F. ; Bianchi, Luciana ; Boyer, Martha ; Choi, Yumi ; Dolphin, Andrew ; Girardi, Léo ; Hogg, David W. ; Kalirai, Jason S. ; Kapala, Maria ; Lewis, Alexia R. ; Rix, Hans Walter ; Sandstrom, Karin ; Skillman, Evan D. / THE PANCHROMATIC HUBBLE ANDROMEDA TREASURY. XV. the BEAST : BAYESIAN EXTINCTION and STELLAR TOOL. In: Astrophysical Journal. 2016 ; Vol. 826, No. 2.
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