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A State Change in the Missing Link Binary Pulsar System PSR J1023+0038

Stappers, B. W. and Archibald, A. M. and Hessels, J. W. T. and Bassa, C. G. and Bogdanov, S. and Janssen, G. H. and Kaspi, V. M. and Lyne, A. G. and Patruno, A. and Tendulkar, S. and Hill, A. B. and Glanzman, T. (2014) A State Change in the Missing Link Binary Pulsar System PSR J1023+0038. Astrophysical Journal, 790 (1). Art. No. 39. ISSN 0004-637X.

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We present radio and γ-ray observations, which, along with concurrent X-ray observations, reveal that the binary millisecond pulsar (MSP)/low-mass X-ray binary transition system PSR J1023+0038 has undergone a transformation in state. Whereas until recently the system harbored a bright millisecond radio pulsar, the radio pulsations at frequencies between 300 to 5000 MHz have now become undetectable. Concurrent with this radio disappearance, the γ-ray flux of the system has quintupled. We conclude that, though the radio pulsar is currently not detectable, the pulsar mechanism is still active and the pulsar wind, as well as a newly formed accretion disk, are together providing the necessary conditions to create the γ-ray increase. This system is the first example of a compact, low-mass binary which has shown significant state changes accompanied by large changes in γ-ray flux; it will continue to provide an exceptional test bed for better understanding the formation of MSPs as well as accretion onto neutron stars in general.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Hessels, J. W. T.0000-0003-2317-1446
Bogdanov, S.0000-0002-9870-2742
Kaspi, V. M.0000-0001-9345-0307
Tendulkar, S.0000-0003-2548-2926
Additional Information:© 2014 The American Astronomical Society. Received 2013 November 29; accepted 2014 May 22; published 2014 July 1. We thank H.A. Krimm for kind support in the use of the Swift/BAT data. A.P. acknowledges support from the Netherlands Organization for Scientific Research (NWO) Vidi fellowship. A.M.A. and J.W.T.H. acknowledge funding for this work from an NWO Vrije Competitie grant. J.W.T.H. also acknowledges funding from an NWO Vidi fellowship and ERC Starting Grant "DRAGNET" (337062). The WSRT is operated by ASTRON with support from NWO. Pulsar observations with the Lovell Telescope are funded through a consolidated grant from STFC. The Fermi LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan, and Sweden. The GBT is operated by the National Radio Astronomy Observatory (NRAO). NRAO is a facility of the NSF operated under cooperative agreement by Associated Universities, Inc. The Arecibo Observatory is operated by SRI International under a cooperative agreement with the NSF (AST-1100968), and in alliance with Ana G. Méndez-Universidad Metropolitana, and the Universities Space Research Association. The Fermi LAT Collaboration acknowledges support from a number of agencies and institutes for both development and the operation of the LAT as well as scientific data analysis. These include NASA and DOE in the United States; CEA/Irfu and IN2P3/CNRS in France; ASI and INFN in Italy; MEXT, KEK, and JAXA in Japan; and the K. A. Wallenberg Foundation, the Swedish Research Council, and the National Space Board in Sweden. Additional support from INAF in Italy and CNES in France for science analysis during the operations phase is also gratefully acknowledged.
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
European Research Council (ERC)337062
Subject Keywords:binaries: eclipsing; pulsars: individual (PSR J1023+0038); X-rays: binaries
Issue or Number:1
Record Number:CaltechAUTHORS:20140818-092118819
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Official Citation:A State Change in the Missing Link Binary Pulsar System PSR J1023+0038 B. W. Stappers et al. 2014 ApJ 790 39
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48645
Deposited By: Jason Perez
Deposited On:19 Aug 2014 22:05
Last Modified:09 Mar 2020 13:18

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