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The light curve and internal magnetic field of the mode-switching pulsar PSR B0943+10

The light curve and internal magnetic field of the mode-switching pulsar PSR B0943+10
The light curve and internal magnetic field of the mode-switching pulsar PSR B0943+10
A number of radio pulsars exhibit intriguing mode-switching behavior. Recent observations of PSR B0943+10 revealed correlated radio and X-ray mode switches, providing a new avenue for understanding this class of objects. The large X-ray pulse fraction observed during the radio quiet phase (Q mode) was previously interpreted as a result of changing obscuration of X-rays by dense magnetosphere plasma. We show that the large X-ray pulse fraction can be explained by including the beaming effect of a magnetic atmosphere, while remaining consistent with the dipole field geometry constrained by radio observations. We also explore a more extreme magnetic field configuration, where a magnetic dipole displaced from the center of the star produces two magnetic polar caps of different sizes and magnetic field strengths. These models are currently consistent with data in radio and X-rays and can be tested or constrained by future X-ray observations.
2041-8205
L27-[5pp]
Storch, Natalia I.
0336cbec-8d26-4d2d-bc28-c02fc93de929
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Lai, Dong
d32877c1-8f5a-4dd1-a411-324afd06878b
Bogdanov, Slavko
39f20582-4d71-4b1a-ae2a-b266367341ef
Heinke, Craig O.
d7382ed2-cb85-4e15-b2d9-296fc8b6221d
Storch, Natalia I.
0336cbec-8d26-4d2d-bc28-c02fc93de929
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Lai, Dong
d32877c1-8f5a-4dd1-a411-324afd06878b
Bogdanov, Slavko
39f20582-4d71-4b1a-ae2a-b266367341ef
Heinke, Craig O.
d7382ed2-cb85-4e15-b2d9-296fc8b6221d

Storch, Natalia I., Ho, Wynn C.G., Lai, Dong, Bogdanov, Slavko and Heinke, Craig O. (2014) The light curve and internal magnetic field of the mode-switching pulsar PSR B0943+10. The Astrophysical Journal Letters, 789 (2), L27-[5pp]. (doi:10.1088/2041-8205/789/2/L27).

Record type: Article

Abstract

A number of radio pulsars exhibit intriguing mode-switching behavior. Recent observations of PSR B0943+10 revealed correlated radio and X-ray mode switches, providing a new avenue for understanding this class of objects. The large X-ray pulse fraction observed during the radio quiet phase (Q mode) was previously interpreted as a result of changing obscuration of X-rays by dense magnetosphere plasma. We show that the large X-ray pulse fraction can be explained by including the beaming effect of a magnetic atmosphere, while remaining consistent with the dipole field geometry constrained by radio observations. We also explore a more extreme magnetic field configuration, where a magnetic dipole displaced from the center of the star produces two magnetic polar caps of different sizes and magnetic field strengths. These models are currently consistent with data in radio and X-rays and can be tested or constrained by future X-ray observations.

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More information

Published date: 20 June 2014
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 365300
URI: http://eprints.soton.ac.uk/id/eprint/365300
ISSN: 2041-8205
PURE UUID: 07f12953-7dfc-435a-9a64-f0ddbf28228b
ORCID for Wynn C.G. Ho: ORCID iD orcid.org/0000-0002-6089-6836

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Date deposited: 02 Jun 2014 09:20
Last modified: 14 Mar 2024 16:50

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Contributors

Author: Natalia I. Storch
Author: Wynn C.G. Ho ORCID iD
Author: Dong Lai
Author: Slavko Bogdanov
Author: Craig O. Heinke

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