H I and CO in the nuclear disk of NGC 4261

Details H I and CO in the nuclear disk of NGC 4261 H I and CO in the nuclear disk of NGC 4261

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..110j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 1, p. 110-113

Astronomy and Astrophysics

Astrophysics

26

Carbon Monoxide, Disk Galaxies, Elliptical Galaxies, Galactic Nuclei, Hydrogen, Molecular Absorption, Radio Emission, Hubble Space Telescope, Interstellar Matter, Luminosity, Radio Galaxies, Very Large Array (Vla)

Scientific paper

We detect radio absorption from neutral gas in the nuclear disk of NGC 4261 seen in front of the nuclear radio source. The gas surface density is consistent with that inferred from the dust optical depth and a gas/dust ratio near the Galactic value. The moderately high velocity dispersion of the gas suggests that the disk orbits would decay rapidly unless the disk is in essentially solid body rotation. The absorption seen in NGC 4261 is consistent with that expected in dust torus 'unified models' of radio galaxies, but similar absorption is seen in a relatively small fraction of radio galaxies.

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