A comparison of metal and Ly-α absorption in galactic haloes | Zendy

Milan M. Ćirković | Zendy

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A comparison of metal and Ly-α absorption in galactic haloes

Author(s) -

Milan M. Ćirković

Publication year - 1998

Publication title -

serbian astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.196

H-Index - 16

eISSN - 1820-9289

pISSN - 1450-698X

DOI - 10.2298/saj9858009c

Subject(s) - physics , astrophysics , galaxy , metallicity , redshift , cosmology , absorption (acoustics) , astronomy , galaxy formation and evolution , galactic corona , galactic halo , halo , optics

The metallicity structure of galactic haloes is one of the major unknowns in modern galactic astrophysics and observational cosmology. Hereby we outline a very simple method for obtaining at least a crude picture of gas abundances, based on recent important statistical determination of the relationship between neutral hydrogen absorbing column density and galaxy impact parameter. It is a fine illustration of the great theoretical and observational power of low-redshift Lyα absorption studies. Future detailed analyses of large samples of absorption-selected galaxies will certainly provide us with more data on the abundance structure of extended gaseous component of galaxies

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