NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T01:41:09 PDT
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For refcode 2001AJ....122..764K:
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Copyright by American Astronomical Society. Reproduced by permission
2001AJ....122..764K SPATIALLY RESOLVED NEAR-INFRARED SPECTROSCOPY OF THE SEYFERT 2 GALAXIES MARKARIAN 1066, NGC 2110, NGC 4388, AND MARKARIAN 3 R. A. KNOP, L. ARMUS, K. MATTHEWS, T. W. MURPHY, AND B. T. SOIFER Palomar Observatory, California Institute of Technology, Pasadena, CA 91125 Received 2000 March 6; accepted 2001 May 9 ABSTRACT We present near-infrared spectra with resolutions of {lambda}/{DELTA} {lambda} ~ 1200 in the emission lines Pa{beta}, [Fe II] ({lambda} = 1.2567 microns), Br{gamma}, and H_2_ {nu} = 1-0 S(1) of the nuclei and circumnuclear regions of the four Seyfert 2 galaxies Mk 1066, NGC 2110, NGC 4388, and Mk 3. All of these galaxies show strong near-infrared line emission that is detected at radii several times the spatial resolution, corresponding to projected physical scales of 0.07 to 0.7 kpc. Velocity gradients are detected in these nuclei, as are spatial variations in line profiles and flux ratios. We compare the spatial and velocity distribution of the line emission to previously observed optical line and radio emission. The evidence indicates that the [Fe II] emission is associated with the Seyfert activity in the galaxies. Our data are consistent with X- ray heating being responsible for most of the [Fe II] emission, although differences in [Fe II] and Pa{beta} line profiles associated with radio emission suggests that the [Fe II] emission is enhanced by fast shocks associated with radio outflows. The H_2_ emission is not as strongly associated with outflows or ionization cones as is the emission in other lines, but rather appears to be primarily associated with the disk of the galaxy. Key words: galaxies: active
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