2018A&A...612A..24Z


Query : 2018A&A...612A..24Z

2018A&A...612A..24Z - Astronomy and Astrophysics, volume 612A, 24-24 (2018/4-1)

Pulsar current sheet Cerenkov radiation.

ZHANG F.

Abstract (from CDS):

Plasma-filled pulsar magnetospheres contain thin current sheets wherein the charged particles are accelerated by magnetic reconnections to travel at ultra-relativistic speeds. On the other hand, the plasma frequency of the more regular force-free regions of the magnetosphere rests almost precisely on the upper limit of radio frequencies, with the cyclotron frequency being far higher due to the strong magnetic field. This combination produces a peculiar situation, whereby radio-frequency waves can travel at subluminal speeds without becoming evanescent. The conditions are thus conducive to Cerenkov radiation originating from current sheets, which could plausibly serve as a coherent radio emission mechanism. In this paper we aim to provide a portrait of the relevant processes involved, and show that this mechanism can possibly account for some of the most salient features of the observed radio signals.

Abstract Copyright: © ESO 2018

Journal keyword(s): radiation mechanisms: non-thermal - stars: neutron

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PSR B0329+54 Psr 03 32 59.3370698592 +54 34 45.028206408           ~ 611 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5092 0
3 M 1 SNR 05 34 32 +22 00.8           ~ 5980 1
4 PSR B1919+21 Psr 19 21 44.815 +21 53 02.25           ~ 370 0

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2022.12.10-05:58:44

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