IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function

Khee Gan Lee, Joseph F. Hennawi, David N. Spergel, David H. Weinberg, David W. Hogg, Matteo Viel, James S. Bolton, Stephen Bailey, Matthew M. Pieri, William Carithers, David J. Schlegel, Britt Lundgren, Nathalie Palanque-Delabrouille, Nao Suzuki, Donald P. Schneider, Christophe Yèche

    Research output: Contribution to journalArticle

    Abstract

    The Lyα forest transmission probability distribution function (PDF) is an established probe of the intergalactic medium (IGM) astrophysics, especially the temperature-density relationship of the IGM. We measure the transmission PDF from 3393 Baryon Oscillations Spectroscopic Survey (BOSS) quasars from Sloan Digital Sky Survey Data Release 9, and compare with mock spectra that include careful modeling of the noise, continuum, and astrophysical uncertainties. The BOSS transmission PDFs, measured at 〈z〉 = [2.3, 2.6, 3.0], are compared with PDFs created from mock spectra drawn from a suite of hydrodynamical simulations that sample the IGM temperature-density relationship, γ, and temperature at mean density, T0, where T (Δ) = T0Δγ-1. We find that a significant population of partial Lyman-limit systems (LLSs) with a column-density distribution slope of βpLLS ∼ -2 are required to explain the data at the low-transmission end of transmission PDF, while uncertainties in the mean Lyα forest transmission affect the high-transmission end. After modeling the LLSs and marginalizing over mean transmission uncertainties, we find that γ = 1.6 best describes the data over our entire redshift range, although constraints on T0 are affected by systematic uncertainties. Within our model framework, isothermal or inverted temperature-density relationships (γ & le; 1) are disfavored at a significance of over 4σ, although this could be somewhat weakened by cosmological and astrophysical uncertainties that we did not model.

    Original languageEnglish (US)
    Article number196
    JournalAstrophysical Journal
    Volume799
    Issue number2
    DOIs
    StatePublished - Feb 1 2015

    Fingerprint

    intergalactic media
    probability distribution functions
    baryons
    oscillation
    oscillations
    astrophysics
    temperature
    modeling
    probe
    distribution
    quasars
    density distribution
    simulation
    slopes
    continuums
    probes

    Keywords

    • Intergalactic medium
    • Large-scale structure of universe
    • Methods: data analysis
    • Quasars: absorption lines
    • Quasars: emission lines
    • Techniques: spectroscopic

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Lee, K. G., Hennawi, J. F., Spergel, D. N., Weinberg, D. H., Hogg, D. W., Viel, M., ... Yèche, C. (2015). IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function. Astrophysical Journal, 799(2), [196]. https://doi.org/10.1088/0004-637X/799/2/196

    IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function. / Lee, Khee Gan; Hennawi, Joseph F.; Spergel, David N.; Weinberg, David H.; Hogg, David W.; Viel, Matteo; Bolton, James S.; Bailey, Stephen; Pieri, Matthew M.; Carithers, William; Schlegel, David J.; Lundgren, Britt; Palanque-Delabrouille, Nathalie; Suzuki, Nao; Schneider, Donald P.; Yèche, Christophe.

    In: Astrophysical Journal, Vol. 799, No. 2, 196, 01.02.2015.

    Research output: Contribution to journalArticle

    Lee, KG, Hennawi, JF, Spergel, DN, Weinberg, DH, Hogg, DW, Viel, M, Bolton, JS, Bailey, S, Pieri, MM, Carithers, W, Schlegel, DJ, Lundgren, B, Palanque-Delabrouille, N, Suzuki, N, Schneider, DP & Yèche, C 2015, 'IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function', Astrophysical Journal, vol. 799, no. 2, 196. https://doi.org/10.1088/0004-637X/799/2/196
    Lee, Khee Gan ; Hennawi, Joseph F. ; Spergel, David N. ; Weinberg, David H. ; Hogg, David W. ; Viel, Matteo ; Bolton, James S. ; Bailey, Stephen ; Pieri, Matthew M. ; Carithers, William ; Schlegel, David J. ; Lundgren, Britt ; Palanque-Delabrouille, Nathalie ; Suzuki, Nao ; Schneider, Donald P. ; Yèche, Christophe. / IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function. In: Astrophysical Journal. 2015 ; Vol. 799, No. 2.
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    AU - Lee, Khee Gan

    AU - Hennawi, Joseph F.

    AU - Spergel, David N.

    AU - Weinberg, David H.

    AU - Hogg, David W.

    AU - Viel, Matteo

    AU - Bolton, James S.

    AU - Bailey, Stephen

    AU - Pieri, Matthew M.

    AU - Carithers, William

    AU - Schlegel, David J.

    AU - Lundgren, Britt

    AU - Palanque-Delabrouille, Nathalie

    AU - Suzuki, Nao

    AU - Schneider, Donald P.

    AU - Yèche, Christophe

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    KW - Quasars: emission lines

    KW - Techniques: spectroscopic

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