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Multi-wavelength Emissions from the Millisecond Pulsar Binary PSR J1023+0038 during an Accretion Active State

Takata, J. and Li, K. L. and Leung, Gene C. K. and Kong, A. K. H. and Tam, P. H. T. and Hui, C. Y. and Wu, E. M. H. and Xing, Yi and Cao, Yi and Tang, Sumin and Wang, Zhongxiang and Cheng, K. S. (2014) Multi-wavelength Emissions from the Millisecond Pulsar Binary PSR J1023+0038 during an Accretion Active State. Astrophysical Journal, 785 (2). Art. No. 131. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20140617-153131163

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Abstract

Recent observations strongly suggest that the millisecond pulsar binary PSR J1023+0038 has developed an accretion disk since 2013 June. We present a multi-wavelength analysis of PSR J1023+0038, which reveals that (1) its gamma-rays suddenly brightened within a few days in 2013 June/July and has remained at a high gamma-ray state for several months; (2) both UV and X-ray fluxes have increased by roughly an order of magnitude; and (3) the spectral energy distribution has changed significantly after the gamma-ray sudden flux change. Time variabilities associated with UV and X-rays are on the order of 100-500 s and 50-100 s, respectively. Our model suggests that a newly formed accretion disk, due to the sudden increase of the stellar wind, could explain the changes of all these observed features. The increase of UV is emitted from the disk, and a new component in gamma-rays is produced by inverse Compton scattering between the new UV component and pulsar wind. The increase of X-rays results from the enhancement of injection pulsar wind energy into the intra-binary shock due to the increase of the stellar wind. We also predict that the radio pulses may be blocked by the evaporated winds from the disk, and the pulsar is still powered by rotation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/785/2/131DOIArticle
http://arxiv.org/abs/1312.0605arXivDiscussion Paper
ORCID:
AuthorORCID
Takata, J.0000-0002-8731-0129
Li, K. L.0000-0001-8229-2024
Kong, A. K. H.0000-0002-5105-344X
Tam, P. H. T.0000-0002-1262-7375
Hui, C. Y.0000-0003-1753-1660
Cao, Yi0000-0002-8036-8491
Tang, Sumin0000-0002-6225-8918
Cheng, K. S.0000-0002-8043-9851
Additional Information:© 2014 American Astronomical Society. Received 2013 November 30; accepted 2014 March 1; published 2014 April 3. J.T. and K.S.C. are supported by a GRF grant from the HK Government under HKU7009 11P. A.K.H.K. is supported by the National Science Council of the Republic of China (Taiwan) through grants NSC100-2628-M-007-002-MY3, NSC100-2923-M-007-001-MY3, and NSC101-2119-M-008-007-MY3. P.H.T. is supported by the National Science Council of the Republic of China (Taiwan) through grant NSC101-2112-M-007-022-MY3. C.Y.H. is supported by the National Research Foundation of Korea through grant 2011-0023383.
Funders:
Funding AgencyGrant Number
General Research Fund (Hong Kong)HKU7009 11P
National Science Council (Taipei)NSC100-2628-M-007-002-MY3
National Science Council (Taipei)NSC100-2923-M-007-001-MY3
National Science Council (Taipei)NSC101-2119-M-008-007-MY3
National Science Council (Taipei)NSC101-2112-M-007-022-MY3
National Research Foundation of Korea2011-0023383
Subject Keywords:accretion, accretion disks; binaries: close; pulsars: individual (PSR J1023+0038)
Issue or Number:2
Record Number:CaltechAUTHORS:20140617-153131163
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140617-153131163
Official Citation:Multi-wavelength Emissions from the Millisecond Pulsar Binary PSR J1023+0038 during an Accretion Active State J. Takata et al. 2014 ApJ 785 131
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46313
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:17 Jun 2014 22:53
Last Modified:22 Nov 2019 19:05

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