Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...364l..29t&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 364, Dec. 1, 1990, p. L29-L32. Research supported by the Universi
Astronomy and Astrophysics
Astrophysics
28
Gravitational Lenses, Iue, Quasars, Diffuse Radiation, Interstellar Matter, Lyman Alpha Radiation, Radiation Distribution, Shock Heating
Scientific paper
Five observations of PG 1115 + 080 taken with the IUE SWP camera have been combined in order to carry out the He I Gunn-Peterson test and to search for a Lyman limit which could determine the redshift of the lens candidate reported by Christian et al. (1987). No Lyman-limit discontinuities are found, implying that the lensing galaxy does not intercept the line of sight or does not contain enough neutral hydrogen to be detected as a Lyman-limit edge. It is estimated that the lens column density for neutral hydrogen is 3 x 10 to the 16th/sq cm or less if it intercepts the line of sight.
Bechtold Jill
Green Richard F.
Tripp Todd M.
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