Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.355..145w&link_type=abstract
Nature (ISSN 0028-0836), vol. 355, Jan. 9, 1992, p. 145-147.
Astronomy and Astrophysics
Astronomy
522
Binary Stars, Extrasolar Planets, Orbital Mechanics, Planetary Systems, Pulsars, Accretion Disks, Least Squares Method, Neutron Stars, Radio Astronomy, Supernova Remnants
Scientific paper
Precise timing measurements of pulses from the recently discovered 6.2 ms pulsar PSR1257 + 12 are used to demonstrate that, rather than being associated with a stellar object, the pulsar is orbited by two or more planet-sized bodies. The planets detected so far have masses of at least 2.8 and 3.4 earth masses. Their respective distances from the pulsar are 0.47 AU and 0.36 AU, and they move in almost circular orbits with periods of 98.2 and 66.6 days. Observations indicate that at least one more planet may be present in this system. The detection of a planetary system around a nearby old neutron star, together with the recent report on a planetary companion to the pulsar PSR1829 - 10, raises the possibility that a nonnegligible fraction of neutron star observable as radio pulsars may be orbited by planetlike bodies.
Frail Dale A.
Wolszczan Alex
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