2015A&A...573A..51B


Query : 2015A&A...573A..51B

2015A&A...573A..51B - Astronomy and Astrophysics, volume 573A, 51-51 (2015/1-1)

General solution for the vacuum electromagnetic field in the surroundings of a rotating star.

BONAZZOLA S., MOTTEZ F. and HEYVAERTS J.

Abstract (from CDS):

Many recent observations of pulsars and magnetars can be interpreted in terms of neutron stars with multipole electromagnetic fields. As a first approximation, we investigate the multipole magnetic and electric fields in the environment of a rotating star when this environment is deprived of plasma. We compute a multipole expansion of the electromagnetic field in vacuum for a given magnetic field on the conducting surface of the rotating star. Then, we consider a few consequences of multipole fields of pulsars. We provide an explicit form of the solution. For each spherical harmonic of the magnetic field, the expansion contains a finite number of terms. A multipole magnetic field can provide an explanation for the stable sub-structures of pulses, and they offer a solution to the problem of current closure in pulsar magnetospheres. This computation generalises the widely used model of a rotating star in vacuum with a dipole field. It can be especially useful as a first approximation to the electromagnetic environment of a compact star, for instance a neutron star, with an arbitrarily magnetic field.

Abstract Copyright:

Journal keyword(s): pulsars: general - stars: magnetars - stars: magnetic field

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Sgr J0418+5729 gam 04 18 33.867 +57 32 22.91           ~ 195 0
2 PSR J0737-3039A Psr 07 37 51.24720 -30 39 40.6700           ~ 239 1
3 PSR J0737-3039 Psr 07 37 51.248 -30 39 40.83           ~ 380 1
4 PSR J0821-4300 Psr 08 21 58.2 -43 00 22           ~ 118 2
5 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1145 2
6 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2120 1
7 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 803 0
8 PSR J2144-3939 Psr 21 44 12.0500 -39 33 59.000           ~ 103 0

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2021.08.06-04:24:38

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