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The White Dwarf Companion of a 2 M_☉ Neutron Star

Bhalerao, Varun B. and Kulkarni, S. R. (2011) The White Dwarf Companion of a 2 M_☉ Neutron Star. Astrophysical Journal Letters, 737 (1). Art. No. L1. ISSN 2041-8205. doi:10.1088/2041-8205/737/1/L1.

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We report the optical discovery of the companion to the 2 M_☉ millisecond pulsar PSR J1614–2230. The optical colors show that the 0.5 M_☉ companion is a 2.2 Gyr old He-CO white dwarf. We infer that M during the accretion phase is <10^(-2), M_(edd). We show that the pulsar was born with a spin close to its current value, well below the rebirth line. The spin-down parameters, the mass of the pulsar, and the age of the system challenge the simple recycling model for the formation of millisecond pulsars.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bhalerao, Varun B.0000-0002-6112-7609
Kulkarni, S. R.0000-0001-5390-8563
Additional Information:© 2011 The American Astronomical Society. Received 2011 April 19; accepted 2011 June 15; published 2011 July 15. We are grateful to Scott Ransom for providing the source position in advance of the publication. We thank M. Kasliwal and A. Gal-Yam for undertaking the observations. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Facilities: Keck:I (LRIS)
Group:Space Radiation Laboratory
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
Subject Keywords:pulsars: individual (PSR J1614–2230)
Issue or Number:1
Classification Code:PACS: 97.20.Rp; 97.60.Gb; 97.10.Gz; 97.60.Jd
Record Number:CaltechAUTHORS:20110830-091647412
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Official Citation:The White Dwarf Companion of a 2 M Neutron Star Varun B. Bhalerao and S. R. Kulkarni 2011 ApJ 737 L1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25158
Deposited On:30 Aug 2011 16:38
Last Modified:09 Nov 2021 16:30

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