A. Possenti et al. 2003 ApJ 599 475 doi:10.1086/379190
Three Binary Millisecond Pulsars in NGC 6266
FREEA. Possenti1,2, N. D'Amico2,3, R. N. Manchester4, F. Camilo5, A. G. Lyne6, J. Sarkissian7 and A. Corongiu2,3
Show affiliationsWe present rotational and astrometric parameters of three millisecond pulsars located near the center of the globular cluster NGC 6266 (M62), resulting from timing observations with the Parkes radio telescope. Their accelerations toward the cluster center yield values of the cluster central density and mass-to-light ratio consistent with those derived from optical data. The three pulsars are in binary systems. One (spin period P = 5.24 ms) is in a 3.5 day orbit around a companion of minimum mass 0.2 M
. The other two millisecond pulsars (P = 3.59 and 3.81 ms) have shorter orbital periods (3.4 and 5.0 hr) and lighter companions (minimum masses of 0.12 and 0.07 M, respectively). The pulsar in the closest system is the fifth member of an emerging class of millisecond pulsars displaying irregular radio eclipses and having a relatively massive companion. This system is a good candidate for optical identification of the companion star. The lack of known isolated pulsars in NGC 6266 is also discussed.
- Subject headings
globular clusters: individual (NGC 6266); pulsars: individual (PSR J1701–3006A, PSR J1701–3006B, PSR J1701–3006C); radio continuum: stars; stars: neutron
- Dates
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Issue 1 (2003 December 10)
Received 2003 April 24, accepted for publication 2003 August 20
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Three Binary Millisecond Pulsars in NGC 6266
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