EVIDENCE OF AN ASTEROID ENCOUNTERING A PULSAR

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EVIDENCE OF AN ASTEROID ENCOUNTERING A PULSAR

Post by Stalker on 26th December 2013, 4:58 am

Debris disks and asteroid belts are expected to form around young pulsars due to fallback material from their original supernova explosions. Disk material may migrate inward and interact with a pulsar's magnetosphere, causing changes in torque and emission. Long-term monitoring of PSR J07384042 reveals both effects. The pulse shape changes multiple times between 1988 and 2012. The torque, inferred via the derivative of the rotational period, changes abruptly from 2005 September. This change is accompanied by an emergent radio component that drifts with respect to the rest of the pulse. No known intrinsic pulsar processes can explain these timing and radio emission signatures. The data lead us to postulate that we are witnessing an encounter with an asteroid or in-falling debris from a disk.
http://iopscience.iop.org/2041-8205/780/2/L31/

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Re: EVIDENCE OF AN ASTEROID ENCOUNTERING A PULSAR

Post by Lazarus on 20th February 2014, 2:39 pm

This discovery now has a news release.

SpaceRef: Asteroids Pound A Tiny Star
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