Published in
American Association for the Advancement of Science, Science, 6050(333), p. 1717-1720, 2011
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Transformation of a Star into a Planet in a Millisecond Pulsar Binary
,
S. D. Bates,
Bates Sd,
V. Bhalerao,
N. D. R. Bhat,
Bhat Ndr,
M. Burgay,
S. Burke-Spolaor,
N. D'Amico,
S. Johnsto,
S. Johnston,
Keith Mj,
M. J. Keith,
M. Kramer,
Kulkarni Sr
and other authors.
Full text: Download
Abstract
Millisecond pulsars are thought to be neutron stars that have been spun-up by accretion of matter from a binary companion. Although most are in binary systems, some 30% are solitary, and their origin is therefore mysterious. PSR J1719-1438, a 5.7 ms pulsar, was detected in a recent survey with the Parkes 64m radio telescope. We show that it is in a binary system with an orbital period of 2.2 h. Its companion's mass is near that of Jupiter, but its minimum density of 23 g cm$^{-3}$ suggests that it may be an ultra-low mass carbon white dwarf. This system may thus have once been an Ultra Compact Low-Mass X-ray Binary, where the companion narrowly avoided complete destruction. ; Comment: 16 pages, 3 figures. Science Express, in press