Puzzling Lyman-alpha line profiles in green pea galaxies
نویسندگان
چکیده
منابع مشابه
Damped Lyman - Alpha Galaxies
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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The Lya line of atomic hydrogen is often a luminous component of the radiation emitted by distant galaxies. Except for those galaxies which have a substantial central source of non-stellar ionizing radiation, most of the Lya radiation emitted by galaxies is generated within regions of the interstellar medium which are photoionized by starlight. Conversely, much of the energy radiated by photoio...
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We have reanalyzed the existing data on Zinc abundances in damped Lyα (DLA) absorbers to investigate whether their mean metallicity evolves with time. Most models of cosmic chemical evolution predict that the mass-weighted mean interstellar metallicity of galaxies should rise with time from a low value ∼ 1/30 solar at z ∼ 3 to a nearly solar value at z ∼ 0. However, several previous analyses ha...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201732478