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Parameters of Disks from VLBI Observations

Published online by Cambridge University Press:  12 April 2016

R. C. Walker
R. C. Walker*
Affiliation:
National Radio Astronomy Observatory1, Socorro, NM 87801, USA

Abstract

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VLBI provides the only direct imaging technique currently available that is able to resolve even the outer parts of accretion disks. Recent observations of water masers in NGC 4258 and of free-free absorption of counterjet radiation in NGC 1275 are the best examples of where VLBI has provided important data on the parameters of disks. Other observations are now being made of similar sources. In addition, recent VLBI observations of HI absorption promise to add yet more constraints on the outer disk regions.

Type
Part 13. Large and Small Scale Disks in AGN
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 591 - 599
Copyright
Copyright © Astronomical Society of the Pacific 1997

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