Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasj...52..185i&link_type=abstract
Publications of the Astronomical Society of Japan, v.52, p.185.
Astronomy and Astrophysics
Astronomy
7
Galaxies: Individual (Mrk 266), Galaxies: Interactions, Galaxies: Seyfert, Galaxies: Starburst
Scientific paper
An extensive tridimensional spectrophotometric study of the extended emission-line regions of Mrk 266, a merging system of a Seyfert galaxy and a LINER, was performed. We obtained its narrow-band images of Hα , [O III] lambda 5007, and [S II] lambda lambda 6716, 6731 using an imaging Fabry-Perot interferometer with a tunable filter and area spectroscopic data by means of a slit-scan. From these data were found high-excitation regions characterized by large [O III]/Hβ ( ~ 10) and large He II lambda 4686/Hβ (>= 0.2). These regions can be considered as being photoionized by a power-law continuum from the Seyfert nucleus. If the continuum is radiated isotropically, an ionizing luminosity of 1055-56 photons s-1 is required. This implies that the Seyfert nucleus is one of the most luminous Seyfert nuclei, and can dominate the heating of dust, emitting the enormous amount of infrared emission of Mrk 266 ( ~ 3 x 1011 LO ). The line ratios and emission-line luminosities of the LINER nucleus can be interpreted as an indication of a central starburst with a bolometric luminosity of about 2-6 x 1010 LO and a large-scale outflow (``superwind''). Finally, we remark on the evolutionary nature of activities of Mrk 266. Partially based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.
Aoki Kentaro
Hattori Takashi
Hayashi Tadashi
Ishigaki Tsuyoshi
Ishii Motomi
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