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Timing Observations of the 8-Hr Binary Pulsar 2127+11C in the Globular Cluster M15

Prince, T. A. and Anderson, S. B. and Kulkarni, S. R. and Wolszczan, A. (1991) Timing Observations of the 8-Hr Binary Pulsar 2127+11C in the Globular Cluster M15. Astrophysical Journal, 374 . L41-L44. ISSN 0004-637X. doi:10.1086/186067.

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We present new results are presented on the position and characteristics of the 8 hr binary pulsar 2127 + 11C in the post-core-collapse (PCC) globular cluster M15. Our results indicate that PSR 2127 + 11C has been ejected from the cluster core via a close encounter with another binary system or isolated star. In particular, the position derived from a phase-connected timing solution places the PSR 2127 + 11C system 2.7 pc (projected) from the core, well outside the compact region containing the other four detected pulsars and the X-ray binary system X2127 + 11/AC 211. While PSR 2127 + 11C is likely still bound to the cluster, it is nonetheless probable that other compact binary pulsars have been totally ejected, thereby contributing to the population of field binary pulsars. Timing results from PSR 2127 + 11C also show a relativistic advance of periastron of 4.46 deg yr^(-1), indicating that the total mass of the system is 2.71 M_⊙.

Item Type:Article
Related URLs:
URLURL TypeDescription
Prince, T. A.0000-0002-8850-3627
Kulkarni, S. R.0000-0001-5390-8563
Additional Information:Copyright 1991, American Astronomical Society. Received 1991 January 24; accepted 1991 March 29. We are grateful to J. H. Taylor for supplying the TEMPO software package; E. S. Phinney for stimulating discussions; S. Djorgovski for an optical image of M15; and Jose Navarro for help in observations. This work was supported by the National Science Foundation, the US Department of Energy, and the Alfred P. Sloan Foundation.
Group:Space Radiation Laboratory
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Department of Energy (DOE)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
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Space Radiation Laboratory1991-05
Record Number:CaltechAUTHORS:20140509-112210129
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45643
Deposited By: Deborah Miles
Deposited On:12 May 2014 20:47
Last Modified:10 Nov 2021 17:14

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