X‐Ray Emission from the Radio Jet in 3C 120 | Zendy

D. E. Harris | Zendy; J. Hjorth | Zendy; A. C. Sadun | Zendy; J. D. Silverman | Zendy; M. Vestergaard | Zendy

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X‐Ray Emission from the Radio Jet in 3C 120

Author(s) -

D. E. Harris,

J. Hjorth,

A. C. Sadun,

J. D. Silverman,

M. Vestergaard

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/307284

Subject(s) - bremsstrahlung , physics , knot (papermaking) , rosat , synchrotron , astrophysics , synchrotron radiation , spectral line , radio galaxy , galaxy , astronomy , photon , optics , chemical engineering , engineering

We report the discovery of X-ray emission from a radio knot at a projecteddistance of 25" from the nucleus of the Seyfert galaxy, 3C 120. The data wereobtained with the ROSAT High Resolution Imager (HRI). Optical upper limits forthe knot preclude a simple power law extension of the radio spectrum and wecalculate some of the physical parameters for thermal bremsstrahlung andsynchrotron self-Compton models. We conclude that no simple model is consistentwith the data but if the knot contains small regions with flat spectra, thesecould produce the observed X-rays (via synchrotron emission) without beingdetected at other wavebands.Comment: 6 pages latex plus 3 ps/eps figures. Uses 10pt.sty and emulateapj.sty. Accepted for publication in the ApJ (6 Jan 99

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