Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...540l..41w&link_type=abstract
The Astrophysical Journal, Volume 540, Issue 1, pp. L41-L44.
Astronomy and Astrophysics
Astronomy
13
Interplanetary Medium, Stars: Planetary Systems, Stars: Pulsars: General, Stars: Pulsars: Individual: Alphanumeric: Psr B1257+12
Scientific paper
Multifrequency observations of the planet pulsar PSR B1257+12 have been made to examine a possibility that the 25.3 day periodicity observed in its pulse timing residuals represents a variable delay generated by solar rotation-induced density fluctuations in the solar wind. New timing measurements of the pulsar show that the amplitude of these residuals is frequency independent, implying that the periodicity cannot be caused by any arrival time delays related to the pulse propagation through an ionized medium. Therefore, in agreement with the original assumption, the observed 25.3 day pulse timing periodicity is most plausibly explained in terms of the orbital motion of a low-mass planet around the pulsar.
Anderson Seth B.
Hoffman Ian M.
Konacki Maciej
Wolszczan Alex
Xilouris Kiriaki M.
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