ar X iv : 0 90 7 . 44 33 v 1 [ as tr o - ph . H E ] 2 5 Ju l 2 00 9 Galactic positrons and electrons from dark matter and astrophysical sources .
نویسنده
چکیده
The electron and positron cosmic rays observations have impulsed a hot debate regarding the origin of such particles. Their propagation in the galactic medium is modeled according to a successfully tested two–zone propagation model. The theoretical uncertainties related to their propagation and production are studied for three cases: secondary production, Dark Matter annihilation, and originating from supernovae remnants.
منابع مشابه
ar X iv : 0 90 7 . 19 12 v 1 [ as tr o - ph . C O ] 1 0 Ju l 2 00 9 Dark Matter Astrophysics
These lectures are intended to provide a brief pedagogical review of dark matter for the newcomer to the subject. We begin with a discussion of the astrophysical evidence for dark matter. The standard weakly-interacting massive particle (WIMP) scenario—the motivation, particle models, and detection techniques—is then reviewed. We provide a brief sampling of some recent variations to the standar...
متن کاملGalactic Signatures of Decaying Dark Matter
If dark matter decays into electrons and positrons, it can affect Galactic radio emissions and the local cosmic ray fluxes. We propose a new, more general analysis of constraints on dark matter. The constraints can be obtained for any decaying dark matter model by convolving the specific dark matter decay spectrum with a response function. We derive this response function from full-sky radio su...
متن کاملar X iv : 0 90 7 . 15 94 v 1 [ as tr o - ph . H E ] 9 J ul 2 00 9 Search for Astrophysical Neutrino Point Sources at Super - Kamiokande
It has been hypothesized that large fluxes of neutrinos may be created in astrophysical “cosmic accelerators.” The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional clustering that characterizes a distant astrophysical signal. We perform a search for neutrino point sources using the upward-going muon data...
متن کاملar X iv : 0 71 0 . 20 62 v 1 [ he p - ph ] 1 0 O ct 2 00 7 Indirect Searches For Dark Matter ( Signals , Hints and Otherwise )
For the SUSY 2007 conference, I was asked to review the topic of indirect searches for dark matter. As part of that talk, I summarized several observations which have been interpreted as the product of dark matter annihilations. In my contribution to the proceedings, I have decided to focus on this aspect of my talk. In particular, I will discuss the cosmic positron spectrum measured by HEAT, t...
متن کاملar X iv : 0 80 8 . 01 61 v 1 [ as tr o - ph ] 1 A ug 2 00 8 Gamma Rays from Ultra - High Energy Cosmic Rays in Cygnus A
Ultra-high energy cosmic rays (UHECRs) accelerated in the jets of active galactic nuclei can accumulate in high magnetic field, ∼ 100 kpc-scale regions surrounding powerful radio galaxies. Photohadronic processes make ultra-relativistic electrons and positrons that initiate electromagnetic cascades, leading to the production of a γ-ray synchrotron halo. We calculate the halo emission in the cas...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009