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For refcode 1996ApJS..105...75C:
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Copyright by American Astronomical Society. Reproduced by permission
1996ApJS..105...75C LARGE-SCALE OUTFLOWS IN EDGE-ON SEYFERT GALAXIES. I. OPTICAL EMISSION-LINE IMAGING AND OPTICAL SPECTROSCOPY EDWARD J. M. COLBERT, STEFI A. BAUM, JACK F. GALLIMORE, CRISTOPHER P. O'DEA, MATTHEW D. LEHNERT, ZLATAN I. TSVETANOV, JOHN S. MULCHAEY, AND SAUL CAGANOFF Received 1995 May 17; accepted 1995 November 30 ABSTRACT We have launched a search for large-scale (>1 kpc) minor axis outflows in edge-on Seyfert galaxies in order to assess their frequency of occurrence and to study their properties. Here we present optical continuum and H{alpha} + [N II] line images and/or minor axis long-slit spectra of 22 edge-on Seyfert galaxies. Six of these galaxies show at least one of the following: (i) bi-symmetric H{alpha} halos extending along the minor axis, (ii) bright emission-line complexes at distances > 4 kpc (in projection) out of the disk, and (iii) double-peaked emission- line profiles from the gas along the minor axis, suggesting that a windblown bubble is present. Our results indicate that > 1/4 of Seyfert galaxies have good evidence for minor axis galactic outflows. Kinetic luminosities of the galactic outflows in our sample Seyfert galaxies are ~10^40^-10^42^ ergs s^-1^, assuming all the observed minor axis emission is produced by the outflow. These values are, in general, ~0.1 as large as those well-studied cases of superwinds in starburst galaxies (Heckman, Armus, & Miley 1990). However, far-infrared luminosities of our sample Seyfert galaxies are also ~0.1 as large. Both starburst-driven superwinds and wide-angled outflows from the active galactic nucleus are possible explanations for the observed large-scale outflows. Subject headings: cooling flows galaxies: ISM - galaxies: kinematics and dynamics - galaxies: Seyfert
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