Anomalous Pulsar In Binary System Stymies Theorists

Science Daily has word of a millisecond pulsar in the wrong kind of binary system that has astronomers scratching their heads. According to current models of pulsar evolution, such a system should have no way to develop. The pulsar J1903+0327, which rotates 465 times per second, seems to be in a highly elongated orbit around a Sun-like star. Quoting: "Astronomers think most millisecond pulsars are sped up by material falling onto them from a companion star. This requires the pulsar to be in a tight orbit around its companion that becomes more and more circular with time. The orbits of some millisecond pulsars are the most perfect circles in the Universe, so the elongated orbit of the new pulsar is a mystery."

Comments

Re:More than meets the eye?

[Gat0r30y]

The article discusses this option, and actually finds it the most satisfying explanation. -

A third scenario says the pulsar may be part of a triple, not a double, star system. In this case, the pulsar's 95-day orbit is around a neutron star or white dwarf, not the Sun-like star seen in the infrared image. The Sun-like star would then be in a more-distant orbit around the pulsar and its close companion Most certainly a quite intriguing possibility.

Re:i have nothing to say

[UID30]

I don't think it runs Linux. I dunno ... about 2/3 of the way down in the 2.6.25.4 patch notes ... yeah ... right there:

commit f96e856cd870007bb8f344e62eff228eba3f6989
Author: Chris Wright
Date: Mon May 5 13:50:24 2008 -0700

        added support for elongated orbit millisecond pulsars.