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Accession Number ADA575547
Title Modeling X-Ray Emission of a Straight Jet: PKS 0920-397.
Publication Date 2010
Media Count 8p
Personal Author A. Siemiginowska D. A. Schwartz D. M. Worrall F. Massaro M. Birkinshaw
Abstract We summarize a study of PKS 0920-397 using our 42 ks Chandra observation in conjunction with our ATCA 20GHz image, and HST/ACS F814W and F475W images. We investigate the hypothesis that the jet X-ray emission is due to inverse-Compton (IC) scattering on the cosmic microwave background (CMB) from the same population of relativistic electrons that give rise to the radio emission. To calculate parameters intrinsic to the source, one must finesse the fact that we do not know the true angle of the jet to our line of sight. Typical assumptions are that the Doppler factor equals the bulk Lorentz factor, or that the Lorentz factor takes some fixed numerical value. While giving useful estimates, neither assumption can be exact in general. We try different constraints to determine the jet quantities. It is plausible that the kinetic flux is constant along the jet prior to a terminal hotspot or lobe, and with minimal bending of the jet. Alternatively because PKS 0920-397 appears straight in projection on the sky, we might assume the jet maintains a constant angle to our line of sight. Either approach gives bulk Lorentz factors of 6 to 8, with kinetic energy flux of order 10(exp 46) erg/s, and with the jet at an angle 2 deg to 4 deg from our line of sight.
Keywords Emission
Jet emission mechanisms
Quasar jets
X ray jets
X rays

Source Agency Non Paid ADAS
NTIS Subject Category 54C - Astrophysics
Corporate Author Naval Observatory, Washington, DC.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1319
Contract Number N/A

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