Electrodynamics at Galactic Center
نویسندگان
چکیده
منابع مشابه
Dark Matter at the Galactic Center
This is a summary of a paper of ours, ref. [1], in which we use the absence of neutrino signals from the galactic center to bound the steepness of a possible central cusp in a dark matter halo made of neutralinos. This summary updates the bounds published in [1] by using the current upper limit by the MACRO collaboration [2] on the neutrino emission from the galactic center. The evidence is mou...
متن کاملAn annihilation fountain at the Galactic center?
Recently, data of taken with the OSSE experiment have been combined with scanning observations by TGRS and SMM to produce maps of the narrow Galactic 511 keV line emission (Purcell et al. 1997). A modelling of the combined data give evidence for three distinct features: the Galactic plane, a central bulge, and an extended emission region at positive latitudes above the Galactic center. It has b...
متن کاملNeutralino Annihilation at the Galactic Center Revisited
The annihilation of neutralino dark matter in the Galactic Center (GC) may result in radio signals that can be used to detect or constrain the dark matter halo density profile or dark matter particle properties. At the Galactic Center, the accretion flow onto the central Black Hole (BH) sustains strong magnetic fields that can induce synchrotron emission by electrons and positrons generated in ...
متن کاملSupermassive Black Hole at the Galactic Center ∗
We derive an analytical expression of a shadow size as a function of a charge in the Reissner – Nordström (RN) metric. Using the derived expression we consider shadows for negative tidal charges and charges corresponding to naked singularities q = Q/M > 1, where Q and M are black hole charge and mass, respectively. An introduction of a negative tidal charge q can describes black hole solutions ...
متن کاملDark-matter spike at the galactic center?
The past growth of the central black hole ~BH! might have enhanced the density of cold dark matter halo particles at the galactic center. We compute this effect in realistic growth models of the present (223) 310M ( BH from a low-mass seed BH, with special attention to dynamical modeling in a realistic galaxy environment with merger and orbital decay of a seed BH formed generally outside the ex...
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: Symposium - International Astronomical Union
سال: 1989
ISSN: 0074-1809
DOI: 10.1017/s0074180900186693