1999ApJ...527L..13C -
Astrophys. J., 527, L13-L16 (1999/December-2)
Integral field spectroscopy of Markarian 273: mapping high-velocity gas flows and an off-nucleus Seyfert 2 nebula.
COLINA L., ARRIBAS S. and BORNE K.D.
Abstract (from CDS):
Integral field optical spectroscopy with the INTEGRAL fiber-based system is used to map the extended ionized regions and gas flows in Mrk 273, one of the closest ultraluminous infrared galaxies. The Hβ and [O III] λ5007 maps show the presence of two distinct regions separated by 4" (3.1 kpc) along position angle (P.A.) 240°. The northeastern region coincides with the optical nucleus of the galaxy and shows the spectral characteristics of LINERs. The southwestern region is dominated by [O III] emission and is classified as a Seyfert 2. Therefore, in the optical, Mrk 273 is an ultraluminous infrared galaxy with a LINER nucleus and an extended off-nucleus Seyfert 2 nebula. The kinematics of the [O III] ionized gas shows (1) the presence of highly disturbed gas in the regions around the LINER nucleus, (2) a high-velocity gas flow with a peak-to-peak amplitude of 2.4x103 km.s–1, and (3) quiescent gas in the outer regions (at 3 kpc). We hypothesize that the high-velocity flow is the starburst-driven superwind generated in an optically obscured nuclear starburst and that the quiescent gas is directly ionized by a nuclear source, similar to the ionization cones typically seen in Seyfert galaxies.
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Journal keyword(s):
Galaxies: Active - Galaxies: Individual: Name: Markarian 273 - Galaxies: Interactions - Galaxies: Nuclei - Galaxies: Seyfert - Galaxies: Starburst
Simbad objects:
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