Possible Detection of A Dust Disk Around A Radio Pulsar

Details Possible Detection of A Dust Disk Around A Radio Pulsar Possible Detection of A Dust Disk Around A Radio Pulsar

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop..490w&link_type=abstract

Spitzer Proposal ID #490

Physics

Scientific paper

In our Spitzer/IRAC survey searching for debris disks around 7 relatively young, energetic radio pulsars, we find an object that is likely a counterpart to pulsar J0729-1448. The object had a flux of 80 micro-Jy at 8.0 microns and much deeper 4.5 and 2.2 (Ks band) micron flux upper limits (<10 micro-Jy), indicating its non-stellar origin. Based on studies of the pulsar, we suggest that the detection indicates the existence of a dust disk around the pulsar. If verified, this would be the first detection of a disk around a rotation-powered pulsar. In order to further study this object and verify our suggestion, we propose a 46 min MIPS 24 micron imaging observation. A detection or a deep flux upper limit from a non-detection would help our identification of the object, and if it is a disk, would allow us to set constraints on the properties, such as the size and temperature, of the disk. The observation, with a 5-sigma sensitivity of 75 micro-Jy at 24 microns, can only be made with Spitzer.

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