Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..427p&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, April 1990, p. 427-430.
Astronomy and Astrophysics
Astronomy
1
Galaxies, Hydrogen Clouds, Quasars, Red Shift, Active Galactic Nuclei, Charge Coupled Devices, Ionized Gases
Scientific paper
Radio observations (Carilli et al. 1989) have detected a tail of neutral hydrogen at the low redshift of the galaxy NGC 3067 and pointing toward the higher redshift quasar 3C 232, which is 2-arcmin distant from NGC 3067. If the quasar and NGC 3067 are physically associated, in spite of their different redshifts, then the quasar would produce a large region of ionized hydrogen in the cloud of neutral hydrogen. Observations aimed at detecting the H-alpha emission expected from such a region of ionized hydrogen were obtained with a CCD; no emission in H-alpha was detected, and upper limits are established. These upper limits rule out a distance closer than several kiloparsecs between the quasar and the neutral hydrogen. Thus the quasar is not embedded in the neutral hydrogen of the galaxy, but a physical association between the quasar and the galaxy is not disproved.
Pesch Peter
Simkin Susan M.
Westpfahl David J. Jr.
No associations
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