A Lyman-Alpha Hygrometer with Variable Pathlength
نویسندگان
چکیده
منابع مشابه
Constraining the Lyman Alpha Escape Fraction with Far-infrared Observations of Lyman Alpha Emitters
We study the far-infrared properties of 498 Lyman Alpha Emitters (LAEs) at z = 2.8, 3.1 and 4.5 in the Extended Chandra Deep Field-South, using 250, 350 and 500μm data from the Herschel Multitiered Extragalactic Survey (HerMES) and 870μm data from the LABOCA ECDFS Submillimeter Survey (LESS). None of the 126, 280 or 92 LAEs at z = 2.8, 3.1 and 4.5, respectively, are individually detected in the...
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Some results from an imaging program to identify low-redshift (0.09 < z < 1.63) damped Lyα (DLA) galaxies are presented. The standard paradigm that was widely accepted a decade ago, that DLA galaxies are the progenitors of luminous disk galaxies, is now being seriously challenged. The indisputable conclusion from imaging studies at low redshift is that the morphological types of DLA galaxies ar...
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It is shown that many properties of Lyα forest absorbers can be derived using simple physical arguments. Analytical expressions are derived for the density and the size of an absorber as a function of its neutral hydrogen column density, which agree well with both observations and hydrodynamical simulations. An expression is presented to compute ΩIGM from the observed column density distributio...
متن کاملA Physical Model of Lyman Alpha Emitters
We present a simple physical model for populating dark matter (DM) halos with Lyman Alpha Emiiters (LAEs) and predict the physical properties of LAEs at z ≈ 3− 7. The central tenet of this model is that the Lyα luminosity is proportional to the star formation rate (SFR) which is directly related to the halo mass accretion rate. The only free parameter in our model is then the starformation effi...
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ژورنال
عنوان ژورنال: Journal of Atmospheric and Oceanic Technology
سال: 1998
ISSN: 0739-0572,1520-0426
DOI: 10.1175/1520-0426(1998)015<0211:alahwv>2.0.co;2