3 kiloparsec radio disk and halo of NGC 1068

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163557· OSTI ID:5614834

Wynn-Williams, C G; Becklin, E E; Scoville, N Z

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. 17 references.

• Research Organization: Hawaii Univ., Honolulu; California Institute of Technology, Pasadena
• OSTI ID: 5614834
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 297; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
GALAXIES
GALAXY NUCLEI
LUMINOSITY
MORPHOLOGY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SEYFERT GALAXIES
STARS