Nonthermal production of WIMPs, cosmice±excesses, andγrays from the Galactic Center
نویسندگان
چکیده
منابع مشابه
Modeling the Galactic Center Nonthermal Filaments as Magnetized Wakes
We simulate the Galactic Center nonthermal filaments as magnetized wakes formed dynamically from amplification of a weak (tens of μG) global magnetic field through the interaction of molecular clouds with a Galactic Center wind. One of the key issues in this cometary model is the stability of the filament against dynamical disruption. Here we show 2-dimensional MHD simulations for interstellar ...
متن کاملThe galactic 511 keV line from electroweak scale WIMPs
We consider possible mechanisms via which electroweak scale WIMPs χ could provide the source of the INTEGRAL/SPI 511 keV photon flux from the galactic centre. We consider scenarios where the WIMP spectrum contains near-degeneracies, with MeV-scale splitting, and focus on three possible production mechanisms for galactic positrons: (i) collisional excitation of the WIMP to a nearby charged state...
متن کاملNonthermal Thz to Tev Emission from Stellar Wind Shocks in the Galactic Center
The central parsec of the Galaxy contains dozens of massive stars with a cumulative mass loss rate ∼ 10 M⊙ yr . Shocks among these stellar winds produce the hot plasma that pervades the central part of the galaxy. We argue that these stellar wind shocks also efficiently accelerate electrons and protons to relativistic energies. The relativistic electrons inverse Compton scatter the ambient ultr...
متن کاملNonthermal Hard X-Ray Emission from the Galactic Ridge
We investigate the origin of the nonthermal X-ray emission from the Galactic ridge in the range 10−200 keV. We consider bremsstrahlung of subrelativistic cosmic ray protons and electrons as production processes. From the solution of the kinetic equations describing the processes of particle in situ acceleration and spatial propagation we derive parameters of the spectra for protons and electron...
متن کاملProper Motion of the Compact, Nonthermal Radio Source in the Galactic Center, Sagittarius a *
Proper motions and radial velocities of luminous infrared stars in the galactic center have provided strong evidence for a dark mass of 2.5 × 10 6 M ⊙ in the central 0.05 pc of the galaxy. The leading hypothesis for this mass is a black hole. High angular resolution measurements at radio wavelengths find a compact radio source, Sagittarius (Sgr) A * , that is either the faint glow from a small ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.103502