Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..735y&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 735-742.
Astronomy and Astrophysics
Astrophysics
45
Active Galactic Nuclei, Astronomical Photometry, Bl Lacertae Objects, Nebulae, Quasars, Absorption Spectra, Brightness Distribution, Emission Spectra, Hot Stars, Red Shift, Shock Heating, Star Formation
Scientific paper
Direct imaging results with V, R, and forbidden O II filters in good seeing are reported for an 80 arcsec x 80 arcsec field centered on the BL Lac object AO 0235 + 164. Redshifted forbidden O II 3727 A emission totaling 9.2 + or - 0.6 x 10 to the -16th ergs/sq cm/s extends over an oval region about 6 arcsec x 4 arcsec. The light distribution in all filters appears to have at least two distinct peaks, one near the previously known V = 21 object 2 arcsec south in projection from AO 0235 + 164, the second 1.3 arcsec east of AO 0235. The detection of 1.4 x 10 to the -16th ergs/sq cm/s in emission at the same wavelength 26 arcsec southwest of the BL Lac in projection is reported. The possible ionization mechanisms are discussed.
Gallagher Jay S.
Yanny Brian
York Donald G.
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