2005A&A...431..477J


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET05:16:04

2005A&A...431..477J - Astronomy and Astrophysics, volume 431, 477-502 (2005/2-4)

The radio-ultraviolet spectral energy distribution of the jet in 3C 273.

JESTER S., ROESER H.-J., MEISENHEIMER K. and PERLEY R.

Abstract (from CDS):

We present deep VLA and HST observations of the large-scale jet in 3C 273 matched to 0.3" resolution. The observed spectra show a significant flattening in the infrared-ultraviolet wavelength range. The jet's emission cannot therefore be assumed to arise from a single electron population and requires the presence of an additional emission component. The observed smooth variations of the spectral indices along the jet imply that the physical conditions vary correspondingly smoothly. We determine the maximum particle energy for the optical jet using synchrotron spectral fits. The slow decline of the maximum energy along the jet implies particle reacceleration acting along the entire jet. In addition to the already established global anti-correlation between maximum particle energy and surface brightness, we find a weak positive correlation between small-scale variations in maximum particle energy and surface brightness. The origin of these conflicting global and local correlations is unclear, but they provide tight constraints for reacceleration models.

Abstract Copyright:

Journal keyword(s): galaxies: jets - galaxies: quasars: individual: 3C 273 - radiation mechanisms: non-thermal - of particles acceleration

CDS comments: Fig.1: Stars St1, St2 are not in SIMBAD.

Simbad objects: 9

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Number of rows : 9

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 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 521 1
2 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5406 1
3 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6356 3
4 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2155 2
5 [BKS95] In1 PoC ~ ~           ~ 6 0
6 [BKS95] B PoC ~ ~           ~ 11 0
7 [BKS95] In2 PoC ~ ~           ~ 6 0
8 [BKS95] St1 * ~ ~           ~ 1 1
9 [BKS95] St2 IR ~ ~           ~ 1 1

    Equat.    Gal    SGal    Ecl

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2021.03.07-05:16:04

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