A galaxy halo with a radius of 65 KPC

Details A galaxy halo with a radius of 65 KPC A galaxy halo with a radius of 65 KPC

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985msngr..42....7b&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1985, p. 7-9.

Physics

Absorption Spectra, Abundance, Galaxies, Halos, Quasars, Charge Coupled Devices, Line Spectra, Lyman Alpha Radiation, Optical Thickness, Red Shift, Spiral Galaxies

Scientific paper

In the spectra of QSOs, a large number of absorption lines are observed, and many of these systems are only known on the basis of their absorption characteristics. Special questions arise in connection with the Ly-alpha forest systems. These questions are considered in the context of a discussion of the different types of extrinsic absorption systems. Attention is also given to the detection of a galaxy identified with the absorption system in PKS 2128-12, and the nature of the Mg II absorption system detected in PKS 2128-12. Questions regarding the association of the absorbing cloud on the line of sight to PKS 2128-12 are considered. It is concluded that an association with a very extended disk is more likely than an association with a halo around a spiral galaxy of absolute luminosity Mv = -20.8.

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