2016A&A...588A.110Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET02:46:21

2016A&A...588A.110Z - Astronomy and Astrophysics, volume 588A, 110-110 (2016/4-1)

The extended jet of AP Librae: Origin of the very high-energy γ-ray emission?

ZACHARIAS M. and WAGNER S.J.

Abstract (from CDS):

The low-frequency peaked BL Lac object (LBL) AP Librae exhibits very-high-energy (VHE, E>100GeV) γ-ray emission and hosts an extended jet, which has been detected in radio and X-rays. The jet X-ray spectral index implies an inverse Compton origin. These observations are unusual for LBLs calling for a consistent explanation of this extraordinary source. The observationally constrained parameters necessary to describe the core emission within the standard one-zone model are unable to explain the broad-band spectrum, even if observationally unconstrained external photon fields are taken into account. We demonstrate that the addition of the extended jet emission successfully reproduces the total spectral energy distribution. In particular, the VHE radiation is produced in the >100kpc long extended jet via inverse Compton scattering of cosmic microwave background photons by highly relativistic electrons. We present several ways to test this theory. The extended jet is weakly magnetized (B0=2.5µG), while its minimum and maximum electron Lorentz factors are γmin=60 and γmax=5x106, respectively. The electron spectral index is s=2.6. These parameters are comparable to parameters of other blazars with extended X-ray jets dominated by inverse Compton scattering.

Abstract Copyright: © ESO, 2016

Journal keyword(s): radiation mechanisms: non-thermal - BL Lacertae objects: individual: AP Librae - galaxies: active - relativistic processes

Simbad objects: 10

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Number of rows : 10

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 B0521-365 BLL 05 22 57.9839686440 -36 27 30.847737786   15.26 14.62 14.48   ~ 738 2
2 QSO J0635-7516 QSO 06 35 46.5080299 -75 16 16.815501   15.96 15.75 15.82   ~ 521 1
3 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2060 1
4 2A 1058-226 BLL 11 03 37.6150843895 -23 29 31.202114088   17.00 16.55 16.61   ~ 325 2
5 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5404 1
6 QSO J1512-0906 Bla 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1180 1
7 QSO B1514-24 BLL 15 17 41.8135246339 -24 22 19.482167214   15.13 14.00 13.95   ~ 665 3
8 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 806 2
9 8C 2007+777 BLL 20 05 30.9981060951 +77 52 43.245329882     16.5 17.36   ~ 412 1
10 4C 04.77 BLL 22 04 17.6523555 +04 40 02.022667   16.20 15.2 10.2   ~ 184 2

    Equat.    Gal    SGal    Ecl

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2021.03.02-02:46:21

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