Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.2507l&link_type=abstract
American Astronomical Society, 186th AAS Meeting, #25.07; Bulletin of the American Astronomical Society, Vol. 27, p.848
Astronomy and Astrophysics
Astronomy
Scientific paper
Latest results of an ongoing imaging and spectroscopic survey of faint galaxies in fields of Hubble Space Telescope spectroscopic target QSOs are presented. The primary results are that at moderate redshifts (0.05 < z < 0.8) most galaxies are surrounded by extended gaseous envelopes of ~ 160 \ h(-1) kpc radius and many or most Lyalpha absorption systems arise in galaxies. The dependence of the incidence and extent of these gaseous envelopes on galaxy type and environment is discussed, and the application of galaxy and absorption system pairs to measurements of galaxy dynamics on large spatial scales and to significant redshifts is described.
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