The 3 kiloparsec radio disk and halo of NGC 1068

Details The 3 kiloparsec radio disk and halo of NGC 1068 The 3 kiloparsec radio disk and halo of NGC 1068

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..607w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 15, 1985, p. 607-610.

Astronomy and Astrophysics

Astronomy

40

Galactic Nuclei, Galactic Structure, Radio Sources (Astronomy), Seyfert Galaxies, Star Distribution, Stellar Luminosity, A Stars, B Stars, Nonthermal Radiation, O Stars, Starburst Galaxies

Scientific paper

The Seyfert galaxy NGC 1068 with the VLA at 2, 6, and 20 cm is mapped, using identically shaped 6.5 arcsec beams at each wavelength. Evidence for a 50 arcsec diameter region of nonthermal radio emission lying outside the strong central triple radio source is found but any free-free emission associated with the 10 micron or the molecular disks is not detected. Upper limits to the free-free emission suggest that the dominant source of UV photons and the main contributor to the overall luminosity in this region is an aging starburst population characterized by B rather than O stars. The age of this burst would be at least 10 years. It is suggested that much of the extended 10 micron emission arises from very small grains that suffer temporary heating to temperatures of order 300 K by the absorption of single UV photons from young stars distributed in the inner 3 kpc disk.

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