On the nature and evolution of the windy binary pulsar PSR 1744 - 24A

Details On the nature and evolution of the windy binary pulsar PSR 1744 - 24A On the nature and evolution of the windy binary pulsar PSR 1744 - 24A

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..588s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 588-592.

Astronomy and Astrophysics

Astrophysics

22

Eclipsing Binary Stars, Main Sequence Stars, Pulsars, Stellar Evolution, Stellar Winds, X Ray Binaries, Radiation Pressure, Stellar Mass Accretion, Stellar Mass Ejection, Stellar Radiation

Scientific paper

It is suggested that the companion of the pulsar PSR 1744 - 24A is an approximately 0.1 solar mass main-sequence star that slightly underfills its Roche lobe and is sending off a cool wind due to excitation by radiation from the pulsar. Unlike in the similarly excited system of pulsar PSR 1957 + 20, pulsar radiation pressure here almost balances wind pressure at the companion distance, leading to vastly fluctuating eclipse patterns and to occasional attempted accretion episodes that are aborted by the propeller effect and result in X-ray bursts. If this picture is correct, multiwavelength continuous observations of PSR 1744 - 24A will give valuable information about the accretion process onto neutron stars rotating with millisecond periods.

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