Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...490..238t&link_type=abstract
Astrophysical Journal v.490, p.238
Astronomy and Astrophysics
Astronomy
80
Galaxies: Individual Ngc Number: Ngc 1068, Galaxies: Nuclei, Galaxies: Photometry, Galaxies: Seyfert, Galaxies: Star Clusters, Galaxies: Stellar Content
Scientific paper
We present new near-infrared speckle and adaptive optics imaging and integral field spectroscopy of the nuclear region of NGC 1068. Ninety-four percent of the K-band light in the central 1" originates from a <=30 milliarcsecond diameter source whose position we determine to coincide within +/-0."15 with the apex of the cone structure seen in the optical narrow emission lines, as well as the location of the flat spectrum radio component S1 and the 12 mu m emission peak. We interpret the compact source as hot dust near the sublimation temperature within ~1 pc of the true nucleus of the galaxy. The remaining 6% of the light in the central 1" comes from a moderately extincted stellar core centered on the nuclear position and of intrinsic size ~50 pc. We show that this nuclear stellar core is probably 5-16 x 108 yr in age and contributes at least 7% of the total nuclear luminosity of ~1 x 1011 L&sun;.
Genzel Reinhard
Maiolino Roberto
Quirrenbach Andreas
Tecza Matthias
Thatte Naranjan
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