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Title:
A VLBA movie of the jet launch region in M87
Authors:
Walker, R. C.; Ly, C.; Junor, W.; Hardee, P. J.
Affiliation:
AA(National Radio Astronomy Observatory, P. O. Box O, Socorro, NM 87801 USA ), AB(Department of Astronomy, University of California, Los Angeles, Los Angeles, CA 90095 USA ), AC(ISR-2, MS-D436, Los Alamos National Laboratory, Los Alamos, NM 87545 USA ), AD(Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487 USA)
Publication:
Journal of Physics: Conference Series, Volume 131, Proceedings of "The Universe Under the Microscope - Astrophysics at High Angular Resolution", held 21-25 April 2008, in Bad Honnef, Germany. Editors: Rainer Schoedel, Andreas Eckart, Susanne Pfalzner and Eduardo Ros, pp. 012053 (2008).
Publication Date:
10/2008
Origin:
IOP
DOI:
10.1088/1742-6596/131/1/012053
Bibliographic Code:
2008JPhCS.131a2053W

Abstract

M87 has one of the largest angular size black holes known. It also has a bright jet that is well resolved across the jet near the core using high frequency VLBI. As such it is the best object to observe to study the launch region of jets where the physical sizes of structures of interest scale with the gravitational radius. Modern numerical simulations suggest that the jet formation extends over 100-1000 Rs. M87 has been observed with a resolution of about 60 Rs at 43 GHz with the VLBA every 3 weeks through 2007, and every 5 days between January and April 2008. A preliminary movie, made from the first 11 observations in 2007, shows fast (thicksim2c) and complex motions in an edge brightened structure with a wide opening angle at the base.
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