Eight new MSPs in NGC 6440 and NGC 6441

Open Access
Authors
  • P.C.C. Freire
  • S.M. Ransom
  • S. Bégin
  • I.H. Stairs
Publication date 2008
Host editors
  • C. Bassa
  • Z. Wang
  • A. Cumming
  • V.M. Kaspi
Book title 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More
Book subtitle McGill University, Montréal, Canada, 12-17 August 2007
ISBN
  • 9780735405028
Series AIP Conference Proceedings
Event 40 Years of Pulsars: Millisecond Pulsars, Magnetars and More, Montréal, Canada
Pages (from-to) 604-606
Publisher Melville, NY: American Institute of Physics
Organisations
  • Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
Abstract
We report the discovery of five new millisecond pulsars in the globular cluster NGC 6440 and three new ones in NGC 6441; each cluster has one previously known pulsar. Four of the new pulsars are found in binary systems. One of the new pulsars, PSR J1748-2021B in NGC 6440, is notable for its eccentric (e = 0.57) and wide (Pb = 20.5 days) orbit. If the rate of advance of periastron is due solely to general relativity, we can estimate of the total mass of this binary system: 2.92 ± 0.20 solar masses. This would imply an anomalously large mass for this pulsar, which could introduce important constraints in the study of the equation of state for cold neutron matter.
Document type Conference contribution
Language English
Published at https://doi.org/10.1063/1.2900307
Downloads
301841.pdf (Accepted author manuscript)
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