The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption

Details The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205...44j&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Physics

Scientific paper

The physical conditions in the inner parsec of accretion disks believed to orbit the central black holes in active galactic nuclei can be probed by imaging the absorption of background radio emission by ionized gas in the disk. High angular resolution radio observations of several nearby galaxies at multiple frequencies have revealed evidence for free-free absorption by disks or tori of ionized gas. The depth and angular width of the absorption appears to increase with decreasing frequency, as expected. Because free-free absorption is much larger at lower frequencies, the longest possible baselines are needed to provide adequate angular resolution; observing at higher frequencies to improve resolution will not help in general. Recent results from VSOP as well as ground-based VLBI arrays will be presented, and constraints on the structure of absorbing material will be discussed. This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the U.S. National Aeronautics and Space Administration.

Affiliated with

Also associated with

No associations

Rating

The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The sub-parsec structure of accretion disks as revealed by VLBI Imaging of free-free absorption will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1362781