Other
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374l..41p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 374, June 20, 1991, p. L41-L44. Research supported by NSF, DOE, a
Other
55
Binary Stars, Globular Clusters, Pulsars, Astronomical Coordinates, Stellar Mass Ejection
Scientific paper
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. The results indicate that PSR 2127 + 11C was 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, indicating that the total mass of the system is 2.71 solar masses.
Anderson Seth B.
Kulkarni Sanjeev R.
Prince Thomas A.
Wolszczan Alex
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