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Issue A&A
Volume 407, Number 3, September I 2003
Page(s) L51 - L54
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20030957



A&A 407, L51-L54 (2003)
DOI: 10.1051/0004-6361:20030957

Letter

Planets orbiting Quark Nova compact remnants

P. Keränen1 and R. Ouyed2, 1

1  Nordic Institute for Theoretical Physics, Blegdamsvej 17, 2100 Copenhagen Ø, Denmark
2  Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada

(Received 17 February 2003 / Accepted 23 June 2003 )

Abstract
We explore planet formation in the Quark Nova scenario. If a millisecond pulsar explodes as a Quark Nova, a protoplanetary disk can be formed out of the metal rich fall-back material. The propeller mechanism transfers angular momentum from the born quark star to the disk that will go through viscous evolution with later plausible grain condensation and planet formation. As a result, earth-size planets on circular orbits may form within short radii from the central quark star. The planets in the PSR 1257+12 system can be explained by our model if the Quark Nova compact remnant is born with a period of ~ 0.5 ms following the explosion. We suggest that a good portion of the Quark Nova remnants may harbour planetary systems.


Key words: pulsars: individual: PSR 1257+12 -- planetary systems: formation

Offprint request: P. Keränen, keranen@nordita.dk

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