Evidence of Fermi bubbles around M31

被引：36

作者：

Pshirkov, M. S. ^{[1
,2
,3
]}

Vasiliev, V. V. ^{[4
]}

Postnov, K. A. ^{[1
,5
]}

机构：

[1] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Sky Prospekt 13, Moscow 119992, Russia

[2] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[3] Pushchino Radio Astron Observ, Pushchino 142290, Russia

[4] IMPRS Max Planck Inst Astron, D-69117 Heidelberg, Germany

[5] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 117234, Russia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 459卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

cosmic rays; ISM: magnetic fields; galaxies: individual: M31; gamma rays: galaxies; MILKY-WAY; LOCAL GROUP; HOT GAS; GALAXY; ABSORPTION; HALO; STAR;

D O I：

10.1093/mnrasl/slw045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gamma-ray haloes can exist around galaxies due to the interaction of escaping galactic cosmic rays with the surrounding gas. We have searched for such a halo around the nearby giant spiral Andromeda galaxy M31 using almost 7 yr of Fermi LAT data at energies above 300 MeV. The presence of a diffuse gamma-ray halo with total photon flux 2.6 +/- 0.6 x 10(-9) cm(-2) s(-1), corresponding to a luminosity (0.3-100 GeV) of (3.2 +/- 0.6) x 10(38) erg s(-1) (for a distance of 780 kpc) was found at a 5.3 sigma confidence level. The halo form does not correspond to the extended baryonic H I disc of M31, as would be expected in hadronic production of gamma photons from cosmic ray interaction, nor it is spherically symmetric, as could be in the case of dark matter annihilation. The best-fitting halo template corresponds to two 6-7.5 kpc bubbles symmetrically located perpendicular to the M31 galactic disc, similar to the 'Fermi bubbles' found around the Milky Way centre, which suggests the past activity of the central supermassive black hole or a star formation burst in M31.

引用

页码：L76 / L80

页数：5

共 27 条

[1] Fermi Large Area Telescope observations of Local Group galaxies: detection of M31 and search for M33 [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Allafort, A. ;

Atwood, W. B. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bouvier, A. ;

Brandt, T. J. ;

Bregeon, J. ;

Brigida, M. ;

Bruel, P. ;

Buehler, R. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Cannon, A. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe. ;

Charles, E. ;

Chekhtman, A. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Conrad, J. ;

Dermer, C. D. ;

de Angelis, A. ;

de Palma, F. ;

Digel, S. W. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Drlica-Wagner, A. ;

Dubois, R. ;

Favuzzi, C. ;

Fegan, S. J. ;

Fortin, P. ;

Frailis, M. .

ASTRONOMY & ASTROPHYSICS, 2010, 523

[2] FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG [J].

Acero, F. ;

Ackermann, M. ;

Ajello, M. ;

Albert, A. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Belfiore, A. ;

Bellazzini, R. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bogart, J. R. ;

Bonino, R. ;

Bottacini, E. ;

Bregeon, J. ;

Britto, R. J. ;

Bruel, P. ;

Buehler, R. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caputo, R. ;

Caragiulo, M. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cavazzuti, E. ;

Charles, E. ;

Chaves, R. C. G. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Chiaro, G. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Cutini, S. ;

D'Ammando, F. ;

de Angelis, A. ;

DeKlotz, M. ;

de Palma, F. ;

Desiante, R. ;

Digel, S. W. ;

Di Venere, L. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2015, 218 (02)

[3] THE SPECTRUM AND MORPHOLOGY OF THE FERMI BUBBLES [J].

Ackermann, M. ;

Albert, A. ;

Atwood, W. B. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Bellazzini, R. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bottacini, E. ;

Brandt, T. J. ;

Bregeon, J. ;

Bruel, P. ;

Buehler, R. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caragiulo, M. ;

Caraveo, P. A. ;

Cavazzuti, E. ;

Cecchi, C. ;

Charles, E. ;

Chekhtman, A. ;

Chiang, J. ;

Chiaro, G. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Conrad, J. ;

Cutini, S. ;

D'Ammando, F. ;

de Angelis, A. ;

de Palma, F. ;

Dermer, C. D. ;

Digel, S. W. ;

Di Venere, L. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Favuzzi, C. ;

Ferrara, E. C. ;

Focke, W. B. ;

Franckowiak, A. ;

Fukazawa, Y. ;

Funk, S. ;

Fusco, P. ;

Gargano, F. ;

Gasparrini, D. ;

Germani, S. .

ASTROPHYSICAL JOURNAL, 2014, 793 (01)

[4]

Bird R., 2015, P ASTR PHYS C 34 INT, P851

[5] Gas-rich dwarf spheroidals [J].

Blitz, L ;

Robishaw, T .

ASTROPHYSICAL JOURNAL, 2000, 541 (02) :675-687

[6] X-ray absorption from the milky way halo and the local group [J].

Bregman, Joel N. ;

Lloyd-Davies, Edward J. .

ASTROPHYSICAL JOURNAL, 2007, 669 (02) :990-1002

[7]

Cram T. R., 1980, Astronomy & Astrophysics Supplement Series, V40, P215

[8] Planck confirmation of the disk and halo rotation of M 31 [J].

De Paolis, F. ;

Gurzadyan, V. G. ;

Nucita, A. A. ;

Ingrosso, G. ;

Kashin, A. L. ;

Khachatryan, H. G. ;

Mirzoyan, S. ;

Poghosian, E. ;

Jetzer, Ph ;

Qadir, A. ;

Vetrugno, D. .

ASTRONOMY & ASTROPHYSICS, 2014, 565

[9] Gamma-ray astronomy and baryonic dark matter [J].

De Paolis, F ;

Ingrosso, G ;

Jetzer, P ;

Roncadelli, M .

ASTROPHYSICAL JOURNAL, 1999, 510 (02) :L103-L106

[10] CIRCUM-GALACTIC GAS AND THE ISOTROPIC GAMMA-RAY BACKGROUND [J].

Feldmann, Robert ;

Hooper, Dan ;

Gnedin, Nickolay Y. .

ASTROPHYSICAL JOURNAL, 2013, 763 (01)

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