2013A&A...557A..48P


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.15CET20:18:49

2013A&A...557A..48P - Astronomy and Astrophysics, volume 557A, 48-48 (2013/9-1)

Spontaneously quenched γ-ray spectra from compact sources.

PETROPOULOU M., ARFANI D. and MASTICHIADIS A.

Abstract (from CDS):

We have studied a mechanism for producing intrinsic broken power-law γ-ray spectra in compact sources. This is based on the principles of automatic photon quenching, according to which γ-rays are being absorbed on spontaneously produced soft photons whenever the injected luminosity in γ-rays lies above a certain critical value. We derived an analytical expression for the critical γ-ray compactness in the case of power-law injection. For the case where automatic photon quenching is relevant, we calculated analytically the emergent steady-state γ-ray spectra. We also performed numerical calculations in order to back up our analytical results. We show that a spontaneously quenched power-law γ-ray spectrum obtains a photon index 3 Γ/2, where Γ is the photon index of the power-law at injection. Thus, large spectral breaks of the γ-ray photon spectrum, e.g. ΔΓ>1, can be obtained by this mechanism. We also discuss additional features of this mechanism that can be tested observationally. Finally, we fit the multiwavelength spectrum of a newly discovered blazar (PKS 0447-439) by using such parameters to explain the break in the γ-ray spectrum by means of spontaneous photon quenching, under the assumption that its redshift lies in the range 0.1<z<0.24.

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - gamma rays: general - BL Lacertae objects: general

Simbad objects: 17

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Number of rows : 17

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 QSO B0229+200 BLL 02 32 48.6154943841 +20 17 17.493345304   18.0 18.00     ~ 246 3
2 IC 310 rG 03 16 42.9787725062 +41 19 29.629862447   14.3       ~ 220 2
3 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3470 3
4 QSO B0317+18 BLL 03 19 51.8081953152 +18 45 34.570122144     18.12     ~ 183 0
5 QSO B0414+009 BLL 04 16 52.4945787354 +01 05 23.896410061   16.86 16.38 16   ~ 237 0
6 6dFGS gJ044924.7-435009 BLL 04 49 24.700 -43 50 08.93 14.95 17.52 15.24 16.27   ~ 120 1
7 87GB 064555.8+152016 BLL 06 48 47.6489790744 +15 16 24.797273299       16.2   ~ 58 0
8 6C 070609+591309 BLL 07 10 30.0681446132 +59 08 20.369016804   17.38 16.52 15.1   ~ 173 2
9 2A 1058-226 BLL 11 03 37.6150843895 -23 29 31.202114088   17.00 16.55 16.61   ~ 303 2
10 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2336 1
11 6C 121520+302351 BLL 12 17 52.0819140772 +30 07 00.636792927   16.07 15.62 13.47   ~ 394 1
12 4C 21.35 QSO 12 24 54.4583467193 +21 22 46.385219365   17.56 17.50 18.2   ~ 544 2
13 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2646 2
14 7C 1424+2401 BLL 14 27 00.3918388878 +23 48 00.035406946 14.52 14.34 14.95 14.5   ~ 277 1
15 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1881 2
16 QSO B2005-489 BLL 20 09 25.3910622923 -48 49 53.722146927   15.75 12.81 11.41   ~ 501 2
17 QSO B2155-304 BLL 21 58 52.0651817803 -30 13 32.120657891   13.36 13.09 12.62   ~ 1522 1

    Equat.    Gal    SGal    Ecl

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2019.12.15-20:18:49

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