Gamma-ray image reconstruction of the Andromeda galaxy

被引：6

作者：

Armand, Celine ^{[1
,2
,3
]}

Calore, Francesca ^{[1
]}

机构：

[1] Univ Grenoble Alpes, USMB, CNRS, LAPTh, F-74000 Annecy, France

[2] Univ Grenoble Alpes, USMB, CNRS, LAPP, F-74000 Annecy, France

[3] Univ Geneva, Astron Dept, Chemin Ec 16, CH-1290 Versoix, Switzerland

来源：

PHYSICAL REVIEW D | 2021年 / 103卷 / 08期

关键词：

GALACTIC-CENTER EXCESS; LARGE-AREA TELESCOPE; DARK-MATTER; STELLAR MASS; EMISSION; M31; DISTANCE; HALO; ALGORITHM; SIGNAL;

D O I：

10.1103/PhysRevD.103.083023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze about 12 years of Fermi-LAT data in the direction of the Andromeda galaxy (M31). We robustly characterize its spectral and morphological properties against systematic uncertainties related to the modeling of the Galactic diffuse emission. We perform this work by adapting and exploiting the potential of the SkyFACT adaptive template fitting algorithm. We reconstruct the gamma-ray image of M31 in a template-independent way, and we show that flat spatial models are preferred by data, indicating an extension of the gamma-ray emission of about 0.3-0.4 degrees for the bulge of M31. This study also suggests that a second component, extending to at least 1 degrees, contributes to the observed total emission. We quantify systematic uncertainties related to mismodeling of Galactic foreground emission at the level of 2.9%.

引用

页数：15

共 59 条

[1] Detection of a gamma-ray source in the Galactic Center consistent with extended emission from dark matter annihilation and concentrated astrophysical emission [J].

Abazajian, Kevork N. ;

Kaplinghat, Manoj .

PHYSICAL REVIEW D, 2012, 86 (08)

[2]

Abdo A. A., 2010, ASTRON ASTROPHYS, V523, P7

[3] Fermi Large Area Telescope Fourth Source Catalog [J].

Abdollahi, S. ;

Acero, F. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Becerra Gonzalez, J. ;

Bellazzini, R. ;

Berretta, A. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonino, R. ;

Bottacini, E. ;

Brandt, T. J. ;

Bregeon, J. ;

Bruel, P. ;

Buehler, R. ;

Burnett, T. H. ;

Buson, S. ;

Cameron, R. A. ;

Caputo, R. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Castro, D. ;

Cavazzuti, E. ;

Charles, E. ;

Chaty, S. ;

Chen, S. ;

Cheung, C. C. ;

Chiaro, G. ;

Ciprini, S. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Coronado-Blazquez, J. ;

Costantin, D. ;

Cuoco, A. ;

Cutini, S. ;

D'Ammando, F. ;

DeKlotz, M. ;

Luque, P. de la Tone ;

de Palma, F. ;

Desai, A. ;

Digel, S. W. ;

Di Lalla, N. ;

Di Mauro, M. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2020, 247 (01)

[4]

Acharya B. S., 2018, WSP

[5] The Search for Spatial Extension in High-latitude Sources Detected by the Fermi Large Area Telescope [J].

Ackermann, M. ;

Ajello, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Bellazzini, R. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonino, R. ;

Bottacini, E. ;

Brandt, T. J. ;

Bregeon, J. ;

Bruel, P. ;

Buehler, R. ;

Cameron, R. A. ;

Caputo, R. ;

Caraveo, P. A. ;

Castro, D. ;

Cavazzuti, E. ;

Charles, E. ;

Cheung, C. C. ;

Chiaro, G. ;

Ciprini, S. ;

Cohen-Tanugi, J. ;

Costantin, D. ;

Cutini, S. ;

D'Ammando, F. ;

de Palma, F. ;

Desai, A. ;

Di Lalla, N. ;

Di Mauro, M. ;

Di Venere, L. ;

Favuzzi, C. ;

Finke, J. ;

Franckowiak, A. ;

Fukazawa, Y. ;

Funk, S. ;

Fusco, P. ;

Gargano, F. ;

Gasparrini, D. ;

Giglietto, N. ;

Giordano, F. ;

Giroletti, M. ;

Green, D. ;

Grenier, I. A. ;

Guillemot, L. ;

Guiriec, S. ;

Hays, E. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2018, 237 (02)

[6] Observations of M31 and M33 with the Fermi Large Area Telescope: A Galactic Center Excess in Andromeda? [J].

Ackermann, M. ;

Ajello, M. ;

Albert, A. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Bellazzini, R. ;

Bissaldi, E. ;

Bloom, E. D. ;

Bonino, R. ;

Bottacini, E. ;

Brandt, T. J. ;

Bregeon, J. ;

Bruel, P. ;

Buehler, R. ;

Cameron, R. A. ;

Caputo, R. ;

Caragiulo, M. ;

Caraveo, P. A. ;

Cavazzuti, E. ;

Cecchi, C. ;

Charles, E. ;

Chekhtman, A. ;

Chiaro, G. ;

Ciprini, S. ;

Costanza, F. ;

Cutini, S. ;

D'Ammando, F. ;

de Palma, F. ;

Desiante, R. ;

Digel, S. W. ;

Di Lalla, N. ;

Di Mauro, M. ;

Di Venere, L. ;

Favuzzi, C. ;

Funk, S. ;

Fusco, P. ;

Gargano, F. ;

Giglietto, N. ;

Giordano, F. ;

Giroletti, M. ;

Glanzman, T. ;

Green, D. ;

Grenier, I. A. ;

Guillemot, L. ;

Guiriec, S. ;

Hayashi, K. ;

Hou, X. ;

Johannesson, G. .

ASTROPHYSICAL JOURNAL, 2017, 836 (02)

[7] FERMI-LAT OBSERVATIONS OF HIGH-ENERGY γ-RAY EMISSION TOWARD THE GALACTIC CENTER [J].

Ajello, M. ;

Albert, A. ;

Atwood, W. B. ;

Barbiellini, G. ;

Bastieri, D. ;

Bechtol, K. ;

Bellazzini, R. ;

Bissaldi, E. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonino, R. ;

Bottacini, E. ;

Brandt, T. J. ;

Bregeon, J. ;

Bruel, P. ;

Buehler, R. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caputo, R. ;

Caragiulo, M. ;

Carave, P. A. ;

Cecchi, C. ;

Chekhtman, A. ;

Chiang, J. ;

Chiaro, G. ;

Ciprini, S. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Cutini, S. ;

D'Ammando, F. ;

de Angelis, A. ;

de Palma, F. ;

Desiante, R. ;

Di Venere, L. ;

Drell, P. S. ;

Favuzzi, C. ;

Ferrara, E. C. ;

Fusco, P. ;

Gargano, F. ;

Gasparrini, D. ;

Giglietto, N. ;

Giommi, P. ;

Giordano, F. ;

Giroletti, M. ;

Glanzman, T. ;

Godfrey, G. ;

Gomez-Vargas, G. A. ;

Grenier, I. A. .

ASTROPHYSICAL JOURNAL, 2016, 819 (01)

[8] NEW LOOK AT STATISTICAL-MODEL IDENTIFICATION [J].

AKAIKE, H .

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 1974, AC19 (06) :716-723

[9]

Bai X., ARXIV190502773

[10] The Fermi-LAT GeV excess as a tracer of stellar mass in the Galactic bulge [J].

Bartels, Richard ;

Storm, Emma ;

Weniger, Christoph ;

Calore, Francesca .

NATURE ASTRONOMY, 2018, 2 (10) :819-828

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