Constraining the magnetic field geometry of the millisecond pulsar PSRJ0030+0451 from joint radio, thermal X-ray, and γ-ray emission
Artikel i vetenskaplig tidskrift, 2023
Context. With the advent of multi-wavelength electromagnetic observations of neutron stars - spanning many decades in photon energies - from radio wavelengths up to X-rays and γ-rays, it has become possible to significantly constrain the geometry and the location of the associated emission regions. Aims. In this work, we use results from the modelling of thermal X-ray observations of PSR J0030+0451 from the Neutron Star Interior Composition Explorer (NICER) mission and phase-aligned radio and γ-ray pulse profiles to constrain the geometry of an off-centred dipole that is able to reproduce the light curves in these respective bands simultaneously. Methods. To this aim, we deduced a configuration with a simple dipole off-centred from the location of the centre of the thermal X-ray hot spots. We show that the geometry is compatible with independent constraints from radio and -ray pulsations only, leading to a fixed magnetic obliquity of α ≈ 75° and a line-of-sight inclination angle of ζ ≈ 54°. Results. We demonstrate that an off-centred dipole cannot be rejected by accounting for the thermal X-ray pulse profiles. Moreover, the crescent shape of one spot is interpreted as the consequence of a small-scale surface dipole on top of the large-scale off-centred dipole.
magnetic fields
stars
gamma rays
Författare
Jérôme A. Pétri
Université de Strasbourg
Observatoire Astronomique de Strasbourg
Centre national de la recherche scientifique (CNRS)
Sebastien Guillot
Institut de Recherche en Astrophysique et Planétologie (IRAP)
Centre national de la recherche scientifique (CNRS)
Lucas Guillemot
Centre national de la recherche scientifique (CNRS)
Universite d'Orleans
Ismaël Cognard
Universite d'Orleans
Centre national de la recherche scientifique (CNRS)
Gilles Theureau
Université Paris Cité
Universite d'Orleans
Centre national de la recherche scientifique (CNRS)
Jean-Matthias Griessmeier
Centre national de la recherche scientifique (CNRS)
Universite d'Orleans
L. Bondonneau
Universite d'Orleans
Université de recherche Paris Sciences et Lettres
Denis González-Caniulef
Centre national de la recherche scientifique (CNRS)
Institut de Recherche en Astrophysique et Planétologie (IRAP)
Natalie A. Webb
Centre national de la recherche scientifique (CNRS)
Institut de Recherche en Astrophysique et Planétologie (IRAP)
Fabian Jankowski
Universite d'Orleans
Centre national de la recherche scientifique (CNRS)
Ihor P. Kravtsov
Sorbonne Université
institute of Radio Astronomy NAS
J. W. Mckee
University of Hull
Tobia Carozzi
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
Baptiste Cecconi
Centre national de la recherche scientifique (CNRS)
Universite d'Orleans
Université de recherche Paris Sciences et Lettres
MacIej Serylak
University of the Western Cape
THE SQUARE KILOMETRE ARRAY OBSERVATORY SKAO
Philippe Zarka
Université de recherche Paris Sciences et Lettres
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 680Ämneskategorier
Subatomär fysik
Astronomi, astrofysik och kosmologi
DOI
10.1051/0004-6361/202346913