A new model framework for circumgalactic Lyα radiative transfer constrained by galaxy-Lyα forest clustering
نویسندگان
چکیده
منابع مشابه
Radiative Transfer Effects on the Lyα Forest
Strong observational evidence for a fluctuating ultraviolet background (UVB) has been accumulating through a number of studies of the H I and He II Lyα forest as well as accurate IGM metallicity measurements. UVB fluctuations could arise both from the inhomogeneous distribution of the ionizing sources and/or from radiative transfer (RT) through the filamentary IGM. In this study we investigate,...
متن کاملA Submillimeter Galaxy Illuminating Its Circumgalactic Medium: Lyα Scattering in a Cold, Clumpy Outflow
We report the detection at 850μm of the central source in SSA22-LAB1, the archetypal ‘Lyman-α Blob’ (LAB), a 100 kpc-scale radio-quiet emission-line nebula at z = 3.1. The flux density of the source, S850 = 4.6± 1.1 mJy implies the presence of a galaxy, or group of galaxies, with a total luminosity of LIR ≈ 1012 L⊙. The position of an active source at the center of a ∼50 kpc-radius ring of line...
متن کاملLyα ABSORBER CORRELATIONS AND THE “BIAS” OF THE Lyα FOREST
Lyα absorber correlations contain information about the underlying density distribution associated with a particular class of absorbers. As such, they provide an opportunity to independently measure the “bias” of the Lyman alpha forest, i.e. the relationship between H I column density and underlying dark matter density. In these proceedings we use hydrodynamic simulations to investigate whether...
متن کاملOn the Small-Scale Clustering of the Lyα Forest Clouds
Recent measurements of the autocorrelation function of the Lyα clouds are analyzed from the point of view of a simple model with strong clustering on the small scales. It is shown that this toy model reproduces fairly well the important linear relation between amplitude of the absorber autocorrelation function and neutral hydrogen column density. In addition, it predicts a correct evolutionary ...
متن کاملStructure in the Lyα Forest
The spatial distribution of Lyα forest absorption systems toward a group of 8, closely spaced QSOs has been analysed and evidence for large scale structure has been found at z = 2.8. Our technique is based on the first and second moments of the transmission probability density function which is capable of identifying and assessing the significance of regions of over-or underdense Lyα absorption...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2018
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/sty2214