Details

Autor(en) / Beteiligte

• Philippov, Alexander A.
• Cerutti, Benoît
• Tchekhovskoy, Alexander
• Spitkovsky, Anatoly

Titel

AB INITIO PULSAR MAGNETOSPHERE: THE ROLE OF GENERAL RELATIVITY

Ist Teil von

• Astrophysical journal. Letters, 2015-12, Vol.815 (2), p.1-5

Ort / Verlag

United States: The American Astronomical Society

Erscheinungsjahr

2015

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• ABSTRACT It has recently been demonstrated that self-consistent particle-in-cell simulations of low-obliquity pulsar magnetospheres in flat spacetime show weak particle acceleration and no pair production near the poles. We investigate the validity of this conclusion in a more realistic spacetime geometry via general-relativistic particle-in-cell simulations of the aligned pulsar magnetosphere with pair formation. We find that the addition of the frame-dragging effect makes the local current density along the magnetic field larger than the Goldreich-Julian value, which leads to unscreened parallel electric fields and the ignition of a pair cascade. When pair production is active, we observe field oscillations in the open field bundle, which could be related to pulsar radio emission. We conclude that general-relativistic effects are essential for the existence of the pulsar mechanism in low-obliquity rotators.