2001A&A...373..881H


Query : 2001A&A...373..881H

2001A&A...373..881H - Astronomy and Astrophysics, volume 373, 881-885 (2001/7-3)

An optical inverse-Compton hotspot in 3C 196?

HARDCASTLE M.J.

Abstract (from CDS):

Several hotspots of FRII radio sources have previously been detected in the X-ray at a flux level consistent with the X-rays being due to inverse-Compton scattering of radio ``synchrotron photons synchrotron self-Compton'', if the magnetic fields in the hotspots are close to their equipartition values. However, the number of hotspots compact and bright enough to exhibit detectable X-ray emission is small, so it is worth searching for synchrotron self-Compton emission in the optical, in spite of the obvious observational difficulties of such an approach. In this note I report on a possible detection of an optical inverse-Compton hotspot in a deep Hubble Space Telescope observation of the distant quasar 3C196, at a level which implies a hotspot magnetic field strength close to equipartition if the electrons have a low-energy cutoff around γ∼500.

Abstract Copyright:

Journal keyword(s): galaxies: active - radiation mechanisms: non-thermal - quasars: individual: 3C196

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Per B AGN 04 37 04.37510272 +29 40 13.8184969   21.7       ~ 484 2
2 3C 196 Sy1 08 13 36.056090 +48 13 02.63597   18.36 17.79     ~ 495 2
3 2E 2503 Sy1 11 39 57.0253396181 +65 47 49.482487703   16.50 16.32     ~ 495 1
4 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 919 5
5 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2177 2

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2021.08.05-13:08:22

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