The extended emission line region of the active galaxy PKS 0521-36

Details The extended emission line region of the active galaxy PKS 0521-36 The extended emission line region of the active galaxy PKS 0521-36

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...211..275b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 2, March 1989, p. 275-279.

Astronomy and Astrophysics

Astrophysics

15

Bl Lacertae Objects, Nebulae, Seyfert Galaxies, Spectrophotometry, Emission Spectra, Galactic Nuclei, H Alpha Line, Nitrogen

Scientific paper

H-alpha and forbidden N II imaging and spectroscopic observations of PKS 0521-36 and its surrounding nebular emission line region are presented. A low surface brightness asymmetric emission region is observed on the opposite side of the optical jet, extending up to 21 kpc from the nucleus. The emission region has a sharp arc-like external edge, which may be the remnant of a bow shock where subsequent cooling of the hot gas provided density and temperature of the gas appropriate for photoionization by the active nucleus.

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