IGM CONSTRAINTS FROM THE SDSS-III/BOSS DR9 Lyα FOREST TRANSMISSION PROBABILITY DISTRIBUTION FUNCTION
نویسندگان
چکیده
منابع مشابه
The probability distribution of the Lyα transmitted flux from a sample of SDSS quasars
We present a measurement of the probability distribution function (PDF) of the transmitted flux in the Lyα forest from a sample of 3492 quasars included in the SDSS DR3 data release. Our intention is to investigate the sensitivity of the Lyα flux PDF as measured from low resolution and low signal-to-noise data to a number of systematic errors such as uncertainties in the mean flux, continuum an...
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The analysis of the Lyman-alpha (Lyα) forest of absorption lines in quasar spectra has emerged as a potentially powerful technique to constrain the linear matter power spectrum. In most previous work, the amplitude of the ionizing background was fixed by calibrating simulations to match the observed mean transmitted flux in the Lyα forest. This procedure is undesirable in principle as it requir...
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We use the probability distribution function (PDF) of the Lyman-α forest flux at z = 2 − 3, measured from high-resolution UVES/VLT data, and hydrodynamical simulations to obtain constraints on cosmological parameters and the thermal state of the intergalactic medium (IGM) at z ∼ 2 − 3. The observed flux PDF at z = 3 alone results in constraints on cosmological parameters in good agreement with ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/799/2/196