Dust and Gas in the Nucleus of NGC 1068: Comparison to the Galactic Center's Central Molecular Zone

Details Dust and Gas in the Nucleus of NGC 1068: Comparison to the Galactic Center's Central Molecular Zone Dust and Gas in the Nucleus of NGC 1068: Comparison to the Galactic Center's Central Molecular Zone

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..439..483g&link_type=abstract

The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies. Proceedings of a workshop held at Shanghai, China on

Astronomy and Astrophysics

Astronomy

Scientific paper

We report new 3-5-μm spectroscopy of the nucleus of NGC 1068, obtained at 0.3″ resolution (corresponding to 20 pc at the distance of NGC 1068), sufficient to partially resolve the continuum peak. The data yield a strong upper limit on the column density of CO, as well as evidence that the 3.4-μm hydrocarbon absorption feature has a similar distribution across the nuclear infrared continuum emission as the previously studied 9.7-μm silicate absorption. Together these imply that at 3-10μm the bulk of the gas in front of the continuum peak has the properties of Galactic diffuse molecular clouds rather than dense clouds. This nuclear environment in NGC 1068 resembles the central molecular zone of the Galaxy.

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