Extended LY Alpha emission around quasars at Z of more than 3.6

Details Extended LY Alpha emission around quasars at Z of more than 3.6 Extended LY Alpha emission around quasars at Z of more than 3.6

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258p..23b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN, 0035-8711), vol. 258, no. 1, Sept. 1, 1992, p. 23P-27P. Research suppor

Astronomy and Astrophysics

Astronomy

15

Scientific paper

We have detected extended Ly alpha emission around two quasars at z of about 3.6, the highest redshift at which such emission has been detected around quasars. An upper limit for extended Ly alpha emission was obtained for a third quasar at z of about 3.8. Our results show that the covering factor of cold gas at radii of 10-20 kpc from these objects is about 1 percent. We discuss the implications of such a low covering factor for theories of galaxy formation.

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