The Knotty Question of the Jet of PKS B1421–490
Links to Fileshttps://iopscience.iop.org/article/10.1086/497823
MetadataShow full item record
Type of Work4 pages
Citation of Original PublicationJ. M. Gelbord, H. L. Marshall, D. M. Worrall, M. Birkinshaw, J. E. J. Lovell, R. Ojha, L. Godfrey, D. A. Schwartz, E. S. Perlman, M. Georganopoulos, D. W. Murphy, and D. L. Jauncey, The Knotty Question of the Jet of PKS B1421–490,The Astrophysical Journal Letters, Volume 632, Number 2,https://doi.org/10.1086%2F497823
RightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
© 2005. The American Astronomical Society. All rights reserved.
We report the discovery of unusually strong optical and X-ray emission associated with a knot in the radio jet of PKS B1421-490. The knot is the brightest feature observed beyond the radio band, with knot/core flux ratios ~300 and 3.7 at optical and X-ray frequencies, respectively. We interpret the extreme optical output of the knot as synchrotron emission. The nature of the X-ray emission is unclear. We consider a second synchrotron component, inverse Compton emission from a relativistic, decelerating jet, and the possibility that this feature is a chance superposition of an unusual BL Lac object.