The Impact of Halo Substructure on Dark Matter Signatures

被引：0
|
作者：
Lattanzi, Massimiliano [1 ,2 ]
Silk, Joseph [3 ]
机构：
[1] Univ Roma La Sapienza, ICRA, I-00183 Rome, Italy
[2] Univ Roma La Sapienza, Dip Fis, I-00183 Rome, Italy
[3] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2009年 / 194卷
关键词：
COSMIC-RAYS; ENERGIES;
D O I：
10.1016/j.nuclphysbps.2009.07.096
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
PAMELA/FERMI/HESS data on positrons may be explained in terms of solar neighbourhood WIMP annihilations primarily to leptons or muons for a few TeV mass WIMP with a Sommerfeld-corrected boost similar to 10(4) - 10(5), provided that a small component of the dark matter is in cold subhalo substructure. Saturation of the Sommerfeld effect constrains the range of contributing substructures to be above similar to 10(5) M-circle dot. Dynamical friction and tidal disruption of substructure in the inner regions of halos and subhalos play an important role in suppressing annihilations. The associated diffuse gamma ray or synchrotron signal from the inner galaxy is below current limits, but an inverse Compton contribution produced in early universe substructure annihilations is potentially detectable by FERMI as an isotropic background.
引用
收藏
页码：162 / 165
页数：4
相关论文
共 50 条
  • [41] Gravitational microlensing and halo dark matter
    Gates, E
    Gyuk, G
    Turner, MS
    NUCLEAR PHYSICS B, 1996, : 157 - 162
  • [42] The mechanics of dark matter Halo formation
    Boily, CM
    Tsuchiya, T
    Spurzem, R
    GALACTIC & STELLAR DYNAMICS, 2003, 10 : 133 - 138
  • [43] On the shape of the Galactic dark matter halo
    Helmi, A
    PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2004, 21 (02): : 212 - 215
  • [44] A Tilt in the Dark Matter Halo of the Galaxy
    Han, Jiwon Jesse
    Naidu, Rohan P.
    Conroy, Charlie
    Bonaca, Ana
    Zaritsky, Dennis
    Caldwell, Nelson
    Cargile, Phillip
    Johnson, Benjamin D.
    Chandra, Vedant
    Speagle, Joshua S.
    Ting, Yuan-Sen
    Woody, Turner
    ASTROPHYSICAL JOURNAL, 2022, 934 (01):
  • [45] Dark matter particles in the galactic halo
    R. Bernabei
    P. Belli
    F. Montecchia
    F. Nozzoli
    F. Cappella
    A. d’Angelo
    A. Incicchitti
    D. Prosperi
    R. Cerulli
    C. J. Dai
    H. L. He
    H. H. Kuang
    J. M. Ma
    X. D. Sheng
    Z. P. Ye
    Physics of Atomic Nuclei, 2009, 72 : 2076 - 2088
  • [46] Dark matter detection in a clumpy halo
    Stiff, D
    Widrow, LM
    Frieman, J
    IDENTIFICATION OF DARK MATTER, 2001, : 127 - 132
  • [47] Dark Matter Particles in the Galactic Halo
    Bernabei, R.
    Belli, P.
    Montecchia, F.
    Nozzoli, F.
    Cappella, F.
    d'Angelo, A.
    Incicchitti, A.
    Prosperi, D.
    Cerulli, R.
    Dai, C. J.
    He, H. L.
    Kuang, H. H.
    Ma, J. M.
    Sheng, X. D.
    Ye, Z. P.
    PHYSICS OF ATOMIC NUCLEI, 2009, 72 (12) : 2076 - 2088
  • [48] THE LOCAL DENSITY OF HALO DARK MATTER
    FLORES, RA
    ANNALES DE PHYSIQUE, 1988, 13 (06) : 13 - 15
  • [49] Dark matter at the center and in the halo of the galaxy
    Bilic, N
    Tupper, GB
    Viollier, RD
    BEYOND THE DESERT 2003, 2003, 92 : 639 - 644
  • [50] Microlensing implications for halo dark matter
    Jetzer, P
    HELVETICA PHYSICA ACTA, 1996, 69 (03): : 179 - 184
12345