Stringent constraint on galactic positron production

被引：165

作者：

Beacom, John F. ^{[1
]}

Yuksel, Hasan

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.97.071102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The intense 0.511 MeV gamma-ray line emission from the Galactic Center observed by INTEGRAL requires a large annihilation rate of nonrelativistic positrons. If these positrons are injected at even mildly relativistic energies, higher-energy gamma rays will also be produced. We calculate the gamma-ray spectrum due to inflight annihilation and compare it with the observed diffuse Galactic gamma-ray data. Even with a simplified but conservative treatment, we find that the positron injection energies must be less than or similar to 3 MeV, which strongly constrains models for Galactic positron production.

引用

页数：4

共 55 条

[41] Unstable relics as a source of galactic positrons
Picciotto, C
Pospelov, M
[J]. PHYSICS LETTERS B, 2005, 605 (1-2) : 15 - 25
[42] On the intensity and spatial morphology of the 511 keV emission in the Milky Way
Prantzos, N
[J]. ASTRONOMY & ASTROPHYSICS, 2006, 449 (03) : 869 - 878
[43] MeV-mass dark matter and primordial nucleosynthesis
Serpico, PD
Raffelt, GG
[J]. PHYSICAL REVIEW D, 2004, 70 (04):
[44] SIGNORE M, 1988, ASTRON ASTROPHYS, V201, P379
[45] EQUILIBRIUM SPECTRA OF SECONDARY COSMIC-RAY POSITRONS IN GALAXY AND SPECTRUM OF COSMIC GAMMA-RAYS RESULTING FROM THEIR ANNIHILATION
STECKER, FW
[J]. ASTROPHYSICS AND SPACE SCIENCE, 1969, 3 (04) : 579 - &
[46] STEIGMAN G, 1968, THESIS NEW YORK U
[47] STRONG A, COMMUNICATION
[48] Strong A. W., 1999, ApLC, V39, P209, DOI DOI 10.48550/ARXIV.ASTRO-PH/9811211
[49] Gamma-ray continuum emission from the inner Galactic region as observed with INTEGRAL/SPI
Strong, AW
Diehl, R
Halloin, H
Schönfelder, V
Bouchet, L
Mandrou, P
Lebrun, F
Terrier, R
[J]. ASTRONOMY & ASTROPHYSICS, 2005, 444 (02) : 495 - U86
[50] Propagation of cosmic-ray nucleons in the Galaxy
Strong, AW
Moskalenko, IV
[J]. ASTROPHYSICAL JOURNAL, 1998, 509 (01) : 212 - 228

← 1 2 3 4 5 6 →