Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..131t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 10, 1991, p. 131-135.
Astronomy and Astrophysics
Astrophysics
12
Active Galactic Nuclei, Infrared Spectra, Near Infrared Radiation, Seyfert Galaxies, Astronomical Spectroscopy, Emission Spectra, Galactic Mass, Interstellar Gas, Starburst Galaxies
Scientific paper
Long-slit spectra at 2.30 and 2.16 micron at a spectral resolution of 1200 have been obtained for the nucleus and inner disk of the Seyfert 2 galaxy NGC 1068 in order to study the stellar population and the ionized and molecular gas at wavelengths where extinction is greatly reduced. At 6-12 arcsec from the nucleus (inner disk), the CO (v = 0-2) band head is seen in absorption at a level consistent with that seen in late K or early M giants. It is shallower than that of M82, a prototype of starburst galaxies, by about 30 percent. Closer to the nucleus, the band head appears progressively weaker. This may be due to scattered nuclear light. The stellar velocity dispersion detected at a radius of 3 arcsec is 300 km/s, implying a mass of 5 x 10 to the 9th solar masses inside 240 pc. Narrow molecular hydrogen and broad Br-gamma emission lines are detected out to about 5 arcsec from the nucleus, originating outside the nucleus.
Joyce Richard R.
Kleinmann Susan G.
Scoville Nicholas Z.
Tamura Masafumi
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