Influence of the photon - neutrino processes on magnetar cooling

Abstract

The photon-neutrino processes $\gamma e^{\pm }\to e^{\pm }\nu \bar{\nu }$, $\gamma \to \nu \bar{\nu }$ and $\gamma \gamma \to \nu \bar{\nu }$ are investigated in the presence of a strongly magnetized and dense electron-positron plasma. The amplitudes of the reactions $\gamma e^{\pm }\to e^{\pm }\nu \bar{\nu }$ and $\gamma \gamma \to \nu \bar{\nu }$ are obtained. In the case of a cold degenerate plasma contributions of the considering processes to neutrino emissivity are calculated. It is shown that contribution of the process $\gamma \gamma \to \nu \bar{\nu }$ to neutrino emissivity is supressed in comparision with the contributions of the processes $\gamma e^{\pm }\to e^{\pm }\nu \bar{\nu }$ and $\gamma \to \nu \bar{\nu }$. The constraint on the magnetic field strength in the magnetar outer crust is obtained.

8 pages, LaTeX, 2 PS figures, based on the talk presented by D.A. Rumyantsev at the XV International Seminar Quarks'2008, Sergiev Posad, Moscow Region, May 23-29, 2008, to appear in the Proceedings

References in corpus (2)

• Magnetar-like X-ray Bursts from an Anomalous X-ray Pulsar
• Discovery of Cyclotron Resonance Features in the Soft Gamma Repeater SGR 1806-20

Cited by in corpus (2)

• Ultraluminous X-ray sources as neutrino pulsars
• Radiative decay of keV-mass sterile neutrinos in a strongly magnetized plasma