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- W2301613963 endingPage "84" @default.
- W2301613963 startingPage "84" @default.
- W2301613963 abstract "We quantify the contribution of Lyα fluorescence to observed spatially extended Lyα halos around Lyα emitters at redshift z = 3.1. The key physical quantities that describe the fluorescent signal include (i) the distribution of cold gas in the circumgalactic medium (CGM); we explore simple analytic models and fitting functions to recent hydrodynamical simulations; and (ii) local variations in the ionizing background due to ionizing sources that cluster around the central galaxy. We account for clustering by boosting the observationally inferred volumetric production rate of ionizing photons, , by a factor of , in which quantifies the clustering of ionizing sources around the central galaxy. We compute by assigning an effective bias parameter to the ionizing sources. This novel approach allows us to quantify our ignorance of the population of ionizing sources in a simple parametrized form. We find a maximum enhancement in the local ionizing background in the range 50–200 at r ∼ 10 physical kpc. For spatially uncorrelated ionizing sources and fluorescing clouds we find that fluorescence can contribute up to ∼ 50%–60% of the observed spatially extended Lyα emission. We briefly discuss how future observations can shed light on the nature of Lyα halos around star-forming galaxies." @default.
- W2301613963 created "2016-06-24" @default.
- W2301613963 creator A5008705003 @default.
- W2301613963 creator A5043720800 @default.
- W2301613963 date "2016-05-10" @default.
- W2301613963 modified "2023-10-12" @default.
- W2301613963 title "ON THE CONTRIBUTION OF FLUORESCENCE TO LY<i>α</i>HALOS AROUND STAR-FORMING GALAXIES" @default.
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- W2301613963 doi "https://doi.org/10.3847/0004-637x/822/2/84" @default.
- W2301613963 hasPublicationYear "2016" @default.