Binary pulsar with a very small mass function

Details Binary pulsar with a very small mass function Binary pulsar with a very small mass function

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..712d&link_type=abstract

Nature (ISSN 0028-0836), vol. 322, Aug. 21, 1986, p. 712-714. NSF-supported research.

Other

27

Binary Stars, Pulsars, Radio Stars, Stellar Evolution, Stellar Orbits, Stellar Rotation

Scientific paper

Radiotelescope pulse-arrival-time (PAT) data of PSR1831-00, primarily at 390 MHz, were collected to characterize the evolution of the binary pulsars. The data were used to calculate, the right ascension and declination, pulsar and orbital periods, dispersion measure, semi-major axis, eccentricity, and time of periastron. The orbital period and semi-major axis are used to calculate the mass function. Comparisons are made with other binary and millisecond pulsars, noting the high degree of similarity with the other objects. The limitations imposed on the evolution of the objects by the observed physical characteristics lead to two possible evolutionary models: mass transfer after or during the formation of the neutron star, or no mass transfer. The first model would have required a contact phase during evolution of the primary. The second model posits a three solar mass primary which was also in contact during its evolution and which went to supernova.

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