2001A&A...373..447J


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.20CET14:29:52

2001A&A...373..447J - Astronomy and Astrophysics, volume 373, 447-458 (2001/7-2)

HST optical spectral index map of the jet of 3C 273.

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

Abstract (from CDS):

We present HST images at 622nm and 300nm of the jet in 3C 273 and determine the run of the optical spectral index at 0.2" along the jet. The smoothness of spectral index changes shows that the physical conditions are varying smoothly across the jet. There is no correlation between the optical flux and spectral index, as would be expected for relativistic electrons suffering strong cooling due to synchrotron emission. We find no evidence for localized acceleration or loss sites. This suggests that the spectral shape is not changing much throughout the jet. We show that relativistic beaming and/or sub-equipartition magnetic fields cannot remove the discrepancy between light-travel time along the jet and the lifetime of electrons emitting optical synchrotron radiation. We consider this further evidence in favour of a distributed electron acceleration process.

Abstract Copyright:

Journal keyword(s): galaxies: jets - quasars, individual: 3C 273

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Pictor A Sy1 05 19 49.7230919028 -45 46 43.855209977   15.73 15.77 14.85   ~ 534 1
2 QSO B0521-365 BLL 05 22 57.9839686440 -36 27 30.847737786   15.26 14.62 14.48   ~ 682 2
3 [LNH84] 3C 273 A PoC 12 29 06 +02 03.1           ~ 46 1
4 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5245 1
5 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6038 3
6 [BKS95] In1 PoC ~ ~           ~ 6 0
7 [BKS95] In2 PoC ~ ~           ~ 6 0

    Equat.    Gal    SGal    Ecl

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2019.11.20-14:29:52

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