منابع مشابه
High energy gamma rays from old accreting neutron stars
We consider a magnetized neutron star with accretion from a companion star or a gas cloud around it, as a possible source of gamma rays with energy between 100 MeV and 10 − 10 eV . The flow of the accreting plasma is terminated by a shock at the Alfvén surface. Such a shock is the site for the acceleration of particles up to energies of ∼ 10 − 10 eV ; gamma photons are produced in the inelastic...
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Acoustic shock waves passing through colliding cold neutron stars can cause repetitive superconducting phase transitions in which the proton condensate relaxes to its equilibrium value via coherent oscillations. As a result, a resonant non-thermal production of gamma rays in the MeV energy range with power up to 10 erg/s can take place during the short period of time before the nuclear matter i...
متن کاملNeutron Capture Gamma Rays ( Thermal Neutron
Detection of landmines using nuclear techniques has been studied extensively since the late 1940s. Nuclear techniques look at either a return radiation, which is characteristic of explosive components that are infrequently found in soil (e.g., nitrogen or carbon), or an intensity change of a noncharacteristic scattered radiation, which is a function of a parameter that differs between soil and ...
متن کاملCosmic Rays from Accreting Isolated Neutron Stars
Interstellar matter that is accreted onto isolated magnetic neutron stars in the Galaxy (∼ 10 by number) is accelerated and reflected back by MHD shocks, which envelope the stars. The integrated power in the Galaxy Lcr,ns is ∼ 10 erg s, the energy distribution is a power law of spectral index > 2, and the particle energy can be raised to 10 GeV, consistent with the power and spectrum of primary...
متن کاملPolarized X-rays from Magnetized Neutron Stars
We review the polarization properties of X-ray emission from highly magnetized neutron stars, focusing on emission from the stellar surfaces. We discuss how x-ray polarization can be used to constrain neutron star magnetic field and emission geometry, and to probe strong-field quantum electrodynamics and possibly constrain the properties of axions.
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1987
ISSN: 0074-1809
DOI: 10.1017/s0074180900161248