Millisecond pulsars cannot account for the inner Galaxy's GeV excess

被引：141

作者：

Hooper, Dan ^{[1
,2
]}

Cholis, Ilias ^{[1
]}

Linden, Tim ^{[3
]}

Siegal-Gaskins, Jennifer M. ^{[4
]}

Slatyer, Tracy R. ^{[5
]}

机构：

[1] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[3] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[4] CALTECH, Pasadena, CA 91125 USA

[5] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 08期

基金：

美国国家科学基金会;

关键词：

X-RAY BINARIES; GALACTIC-CENTER; DARK-MATTER; POPULATION; EMISSION; COLLAPSE; RADIO; SKY;

D O I：

10.1103/PhysRevD.88.083009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data from the Fermi Gamma-Ray Space Telescope, a spatially extended component of gamma rays has been identified from the direction of the Galactic center, peaking at energies of similar to 2-3 GeV. More recently, it has been shown that this signal is not confined to the innermost hundreds of parsecs of the Galaxy, but instead extends to at least similar to 3 kpc from the Galactic center. While the spectrum, intensity, and angular distribution of this signal is in good agreement with predictions from annihilating dark matter, it has also been suggested that a population of unresolved millisecond pulsars could be responsible for this excess GeV emission from the inner Galaxy. In this paper, we consider this later possibility in detail. Comparing the observed spectral shape of the inner Galaxy's GeV excess to the spectrum measured from 37 millisecond pulsars by Fermi, we find that these sources exhibit a spectral shape that is much too soft at sub-GeV energies to accommodate this signal. We also construct population models to describe the spatial distribution and luminosity function of the Milky Way's millisecond pulsars. After taking into account constraints from the observed distribution of Fermi sources ( including both sources known to be millisecond pulsars, and unidentified sources which could be pulsars), we find that millisecond pulsars can account for no more than similar to 10% of the inner Galaxy's GeV excess. Each of these arguments strongly disfavor millisecond pulsars as the source of this signal.

引用

页数：12

共 36 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] The consistency of Fermi-LAT observations of the galactic center with a millisecond pulsar population in the central stellar cluster [J].

Abazajian, Kevork N. .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2011, (03)

[3] THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS (vol 187, pg 460, 2010) [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Camilo, F. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe. ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cognard, I. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbet, R. ;

Cutini, S. ;

den Hartog, P. R. ;

Dermer, C. D. ;

de Angelis, A. ;

de Luca, A. ;

de Palma, F. ;

Digel, S. W. ;

Dormody, M. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2011, 193 (01)

[4] FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Allafort, A. ;

Antolini, E. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Belli, F. ;

Berenji, B. ;

Bisello, D. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Bonnell, J. ;

Borgland, A. W. ;

Bouvier, A. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Busetto, G. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Campana, R. ;

Canadas, B. ;

Caraveo, P. A. ;

Carrigan, S. ;

Casandjian, J. M. ;

Cavazzuti, E. ;

Ceccanti, M. ;

Cecchi, C. ;

Celik, Oe. ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Cillis, A. N. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Conrad, J. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 188 (02) :405-436

[5] THE FIRST FERMI LARGE AREA TELESCOPE CATALOG OF GAMMA-RAY PULSARS [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Camilo, F. ;

Caraveo, P. A. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cognard, I. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbet, R. ;

Cutini, S. ;

den Hartog, P. R. ;

Dermer, C. D. ;

de Angelis, A. ;

de Luca, A. ;

de Palma, F. ;

Digel, S. W. ;

Dormody, M. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2010, 187 (02) :460-494

[6] A Population of Gamma-Ray Millisecond Pulsars Seen with the Fermi Large Area Telescope [J].

Abdo, A. A. ;

Ackermann, M. ;

Ajello, M. ;

Atwood, W. B. ;

Axelsson, M. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Baring, M. G. ;

Bastieri, D. ;

Baughman, B. M. ;

Bechtol, K. ;

Bellazzini, R. ;

Berenji, B. ;

Bignami, G. F. ;

Blandford, R. D. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Bregeon, J. ;

Brez, A. ;

Brigida, M. ;

Bruel, P. ;

Burnett, T. H. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Camilo, F. ;

Caraveo, P. A. ;

Carlson, P. ;

Casandjian, J. M. ;

Cecchi, C. ;

Celik, Oe ;

Charles, E. ;

Chekhtman, A. ;

Cheung, C. C. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cognard, I. ;

Cohen-Tanugi, J. ;

Cominsky, L. R. ;

Conrad, J. ;

Corbet, R. ;

Cutini, S. ;

Dermer, C. D. ;

Desvignes, G. ;

de Angelis, A. ;

de Luca, A. ;

de Palma, F. ;

Digel, S. W. .

SCIENCE, 2009, 325 (5942) :848-852

[7] Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT [J].

Ackermann, M. ;

Ajello, M. ;

Albert, A. ;

Baldini, L. ;

Ballet, J. ;

Barbiellini, G. ;

Bastieri, D. ;

Bechtol, K. ;

Bellazzini, R. ;

Bloom, E. D. ;

Bonamente, E. ;

Borgland, A. W. ;

Brandt, T. J. ;

Bregeon, J. ;

Brigida, M. ;

Bruel, P. ;

Buehler, R. ;

Buson, S. ;

Caliandro, G. A. ;

Cameron, R. A. ;

Caraveo, P. A. ;

Cecchi, C. ;

Charles, E. ;

Chekhtman, A. ;

Chiang, J. ;

Ciprini, S. ;

Claus, R. ;

Cohen-Tanugi, J. ;

Conrad, J. ;

Cuoco, A. ;

Cutini, S. ;

D'Ammando, F. ;

de Palma, F. ;

Dermer, C. D. ;

Digel, S. W. ;

do Couto e Silva, E. ;

Drell, P. S. ;

Drlica-Wagner, A. ;

Dubois, R. ;

Favuzzi, C. ;

Fegan, S. J. ;

Ferrara, E. C. ;

Fortin, P. ;

Fukazawa, Y. ;

Fusco, P. ;

Gargano, F. ;

Gasparrini, D. ;

Germani, S. ;

Giglietto, N. ;

Giroletti, M. .

PHYSICAL REVIEW D, 2012, 85 (08)

[8] A comment on the emission from the Galactic Center as seen by the Fermi telescope [J].

Boyarsky, Alexey ;

Malyshev, Denys ;

Ruchayskiy, Oleg .

PHYSICS LETTERS B, 2011, 705 (03) :165-169

[9] X-RAY BINARIES IN GLOBULAR CLUSTERS [J].

CLARK, GW .

ASTROPHYSICAL JOURNAL, 1975, 199 (03) :L143-L145

[10] Neutron star population dynamics .1. Millisecond pulsars [J].

Cordes, JM ;

Chernoff, DF .

ASTROPHYSICAL JOURNAL, 1997, 482 (02) :971-992

← 1 2 3 4 →