An inhomogeneous jet model for the rapid variability of TeV blazars

被引：27

作者：

Boutelier, T. ^{[1
]}

Henri, G. ^{[1
]}

Petrucci, P. -O. ^{[1
]}

机构：

[1] Univ Grenoble 1, Lab Astrophys Grenoble, CNRS, UMR 5571, F-38041 Grenoble, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2008年 / 390卷 / 01期

关键词：

radiation mechanisms: non-thermal; galaxies: active; BL Lacertae objects: individual: PKS 2155-304; galaxies: jets; gamma-rays: theory;

D O I：

10.1111/j.1745-3933.2008.00539.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new time-dependent inhomogeneous jet model of non-thermal blazar emission, which reproduces the entire spectral energy distribution together with the rapid gamma-ray variability. Ultrarelativistic leptons are injected at the base of a jet and propagate along the jet structure. We assume continuous reacceleration and cooling, producing a relativistic quasi-maxwellian (or 'pile-up') particle energy distribution. The synchrotron and synchrotron self-Compton jet emissivity are computed at each altitude. Klein-Nishina effects as well as intrinsic gamma-gamma absorption are included in the computation. Due to the pair production optical depth, considerable particle density enhancement can occur, particularly during flaring states. Time-dependent jet emission can be computed by varying the particle injection, but due to the sensitivity of pair production process, only small variations of the injected density are required during the flares. The stratification of the jet emission, together with a pile-up distribution, allows significantly lower bulk Lorentz factors, compared to one-zone models. Applying this model to the case of PKS 2155-304 and its big TeV flare observed in 2006, we can reproduce simultaneously the average broad-band spectrum of this source as well as the TeV spectra and TeV light curve of the flare with bulk Lorentz factor lower than 15.

引用

页码：L73 / L77

页数：5

共 26 条

[1] An exceptional very high energy gamma-ray flare of PKS 2155-304 [J].

Aharonian, F. ;

Akhperjanian, A. G. ;

Bazer-Bachi, A. R. ;

Behera, B. ;

Beilicke, M. ;

Benbow, W. ;

Berge, D. ;

Bernloehr, K. ;

Boisson, C. ;

Bolz, O. ;

Borrel, V. ;

Boutelier, T. ;

Braun, I. ;

Brion, E. ;

Brown, A. M. ;

Buehler, R. ;

Buesching, I. ;

Bulik, T. ;

Carrigan, S. ;

Chadwick, P. M. ;

Clapson, A. C. ;

Chounet, L.-M. ;

Coignet, G. ;

Cornils, R. ;

Costamante, L. ;

Degrange, B. ;

Dickinson, H. J. ;

Djannati-Atai, A. ;

Domainko, W. ;

Drury, L. O'C. ;

Dubus, G. ;

Dyks, J. ;

Egberts, K. ;

Emmanoulopoulos, D. ;

Espigat, P. ;

Farnier, C. ;

Feinstein, F. ;

Fiasson, A. ;

Foerster, A. ;

Fontaine, G. ;

Funk, Seb. ;

Funk, S. ;

Fuessling, M. ;

Gallant, Y. A. ;

Giebels, B. ;

Glicenstein, J. F. ;

Glueck, B. ;

Goret, P. ;

Hadjichristidis, C. ;

Hauser, D. .

ASTROPHYSICAL JOURNAL, 2007, 664 (02) :L71-L74

[2] A low level of extragalactic background light as revealed by γ-rays from blazars [J].

Aharonian, F ;

Akhperjanian, AG ;

Bazer-Bachi, AR ;

Beilicke, M ;

Benbow, W ;

Berge, D ;

Bernlöhr, K ;

Boisson, C ;

Bolz, O ;

Borrel, V ;

Braun, I ;

Breitling, F ;

Brown, AM ;

Chadwick, PM ;

Chounet, LM ;

Cornils, R ;

Costamante, L ;

Degrange, B ;

Dickinson, HJ ;

Djannati-Ataï, A ;

Drury, LO ;

Dubus, G ;

Emmanoulopoulos, D ;

Espigat, P ;

Feinstein, F ;

Fontaine, G ;

Fuchs, Y ;

Funk, S ;

Gallant, YA ;

Giebels, B ;

Gillessen, S ;

Glicenstein, JF ;

Goret, P ;

Hadjichristidis, C ;

Hauser, D ;

Hauser, M ;

Heinzelmann, G ;

Henri, G ;

Hermann, G ;

Hinton, JA ;

Hofmann, W ;

Holleran, M ;

Horns, D ;

Jacholkowska, A ;

de Jager, OC ;

Khélifi, B ;

Klages, S ;

Komin, N ;

Konopelko, A ;

Latham, IJ .

NATURE, 2006, 440 (7087) :1018-1021

[3] HESS observations of PKS 2155-304 [J].

Aharonian, F ;

Akhperjanian, AG ;

Aye, KM ;

Bazer-Bachi, AR ;

Beilicke, M ;

Benbow, W ;

Berge, D ;

Berghaus, P ;

Bernlöhr, K ;

Bolz, O ;

Boisson, C ;

Borgmeier, C ;

Breitling, F ;

Brown, AM ;

Gordo, JB ;

Chadwick, PM ;

Chitnis, VR ;

Chounet, LM ;

Cornils, R ;

Costamante, L ;

Degrange, B ;

Djannati-Ataï, AD ;

Drury, LO ;

Ergin, T ;

Espigat, P ;

Feinstein, F ;

Fleury, P ;

Fontaine, G ;

Funk, S ;

Gallant, YA ;

Giebels, B ;

Gillessen, S ;

Goret, P ;

Guy, J ;

Hadjichristidis, C ;

Hauser, M ;

Heinzelmann, G ;

Henri, G ;

Hermann, G ;

Hinton, JA ;

Hofmann, W ;

Holleran, M ;

Horns, D ;

de Jager, OC ;

Jung, I ;

Khélifi, B ;

Komin, N ;

Konopelko, A ;

Latham, IJ ;

Le Gallou, R .

ASTRONOMY & ASTROPHYSICS, 2005, 430 (03) :865-875

[4] Variable very high energy γ-ray emission from Markarian 501 [J].

Albert, J. ;

Aliu, E. ;

Anderhub, H. ;

Antoranz, P. ;

Armada, A. ;

Baixeras, C. ;

Barrio, J. A. ;

Bartko, H. ;

Bastieri, D. ;

Becker, J. K. ;

Bednarek, W. ;

Berger, K. ;

Bigongiari, C. ;

Biland, A. ;

Bock, R. K. ;

Bordas, P. ;

Bosch-Ramon, V. ;

Bretz, T. ;

Britvitch, I. ;

Camara, M. ;

Carmona, E. ;

Chilingarian, A. ;

Coarasa, J. A. ;

Commichau, S. ;

Contreras, J. L. ;

Cortina, J. ;

Costado, M. T. ;

Curtef, V. ;

Danielyan, V. ;

Dazzi, F. ;

De Angelis, A. ;

Delgado, C. ;

de los Reyes, R. ;

De Lotto, B. ;

Domingo-Santamaria, E. ;

Dorner, D. ;

Doro, M. ;

Errando, M. ;

Fagiolini, M. ;

Ferenc, D. ;

Fernandez, E. ;

Firpo, R. ;

Flix, J. ;

Fonseca, M. V. ;

Font, L. ;

Fuchs, M. ;

Galante, N. ;

Garcia-Lopez, R. J. ;

Garczarczyk, M. ;

Gaug, M. .

ASTROPHYSICAL JOURNAL, 2007, 669 (02) :862-883

[5] Implications of very rapid TeV variability in blazars [J].

Begelman, Mitchell C. ;

Fabian, Andrew C. ;

Rees, Martin J. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 384 (01) :L19-L23

[6] The black hole mass of low redshift radiogalaxies [J].

Bettoni, D ;

Falomo, R ;

Fasano, G ;

Govoni, F .

ASTRONOMY & ASTROPHYSICS, 2003, 399 (03) :869-878

[7]

Chiaberge M, 2000, ASTRON ASTROPHYS, V358, P104

[8] Decelerating flows in TeV blazars: A resolution to the BL Lacertae-FR I unification problem [J].

Georganopoulos, M ;

Kazanas, D .

ASTROPHYSICAL JOURNAL, 2003, 594 (01) :L27-L30

[9]

GHISELLINI G, 1985, ASTRON ASTROPHYS, V146, P204

[10] Unveiling the X-ray/TeV engine in Mkn 421 [J].

Giebels, B. ;

Dubus, G. ;

Khelifi, B. .

ASTRONOMY & ASTROPHYSICS, 2007, 462 (01) :29-41

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