Aligned Radio and Emission-Line Jets in the Type 2 Seyfert Galaxy MKN 1066

Details Aligned Radio and Emission-Line Jets in the Type 2 Seyfert Galaxy MKN 1066 Aligned Radio and Emission-Line Jets in the Type 2 Seyfert Galaxy MKN 1066

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18510914b&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #109.14; Bulletin of the American Astronomical Society, Vol. 26, p.1505

Astronomy and Astrophysics

Astronomy

Scientific paper

Previous investigations of Seyfert galaxies indicate that although gravitation plays a key role in determining the kinematics in the NLR, an additional acceleration mechanism seems to contribute in the NLRs of Seyferts with luminous nuclear radio sources (with log L (1415 MHz) (W Hz(-1) ) >= 22.5) showing linear morphology. Hydrodynamical effects associated with the jet powering the radio source in such Seyferts may be reflected by additional acceleration of the high-excitation gas. We are analyzing high-resolution imaging and spectroscopy of the type 2 Seyfert Mkn 1066 = UGC 2456. In images obtained with the Planetary Camera aboard HST, the Hα + [N II] emission lies in a region 3'' \ (490 \ h(-1) pc, h = H_0/100 km s(-1) Mpc(-1) ) long centered on the nucleus, while the [O III] emission is concentrated into a bright ``jet-like'' structure extending 1.('') 4 \ (230 \ h(-1) pc) NW of the nucleus. Ground-based spectroscopy indicates that at least two kinematic components of ionized gas are present in the extended narrow line region (ENLR). The low-excitation emission lines trace out a rotation curve with amplitude ~ 200 km s(-1) . However, relative to the low-excitation emission-line kinematics, the [O III]-emitting gas is blueshifted NW of the nucleus and redshifted SE of the nucleus. A 3.6 cm map obtained with the VLA confirms that the radio source has a ``linear'' morphology and appears to be a bipolar jet. Both the [O III] and Hα + [N II] emission are aligned with the radio axis. Since the high-excitation gas is coincident with the radio jet and has peculiar kinematics, non-virial forces appear to be significant in Mkn 1066.

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