Eclipses of the ablating binary pulsar PSR1744 - 24A

Details Eclipses of the ablating binary pulsar PSR1744 - 24A Eclipses of the ablating binary pulsar PSR1744 - 24A

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.353..731t&link_type=abstract

Nature (ISSN 0028-0836), vol. 353, Oct. 24, 1991, p. 731-733. Research supported by NSF and U.S. Department of Education.

Physics

12

Ablation, Eclipses, Eclipsing Binary Stars, Pulsars, Stellar Physics, Electron Density (Concentration), Electron Energy, Globular Clusters, Light Curve, Mass Transfer, Radio Attenuation, Stellar Winds

Scientific paper

The light curve of the binary pulsar PSR1744 - 24A has been measured at 1.67 GHz, and it is found that the eclipse is not total: maximum attenuation in some cases is only about 70 percent. The pulse signal is substantially delayed during the eclipse. These observations are modeled using free-free absorption and dispersion in an ionized wind. A simplified model predicts a wind density at the Roche surface of about 6 x 10 exp 7 electrons/cu cm and a T(e) in the wind of 3600-15,000 K. Such a wind is unlikely to ablate the companion star entirely in less than a Hubble time, so that in this one case at least, ablation may not ultimately form an isolated millisecond pulsar.

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