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dc.contributor.authorBrook, P.
dc.contributor.authorKarastergiou, A.
dc.contributor.authorBuchner, S.
dc.contributor.authorRoberts, S.
dc.contributor.authorKeith, M.
dc.contributor.authorJohnston, S.
dc.contributor.authorShannon, Ryan
dc.date.accessioned2017-01-30T15:08:40Z
dc.date.available2017-01-30T15:08:40Z
dc.date.created2016-01-11T20:00:24Z
dc.date.issued2014
dc.identifier.citationBrook, P. and Karastergiou, A. and Buchner, S. and Roberts, S. and Keith, M. and Johnston, S. and Shannon, R. 2014. Evidence of an asteroid encountering a pulsar. Astrophysical Journal Letters. 780 (2).
dc.identifier.urihttp://hdl.handle.net/20.500.11937/43601
dc.identifier.doi10.1088/2041-8205/780/2/L31
dc.description.abstract

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 J0738-4042 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.

dc.titleEvidence of an asteroid encountering a pulsar
dc.typeJournal Article
dcterms.source.volume780
dcterms.source.number2
dcterms.source.issn2041-8205
dcterms.source.titleAstrophysical Journal Letters
curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access via publisher


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