G. Bryden et al. 2006 ApJ 646 1038 doi:10.1086/504976
G. Bryden1, C. A. Beichman2, G. H. Rieke3, J. A. Stansberry3, K. R. Stapelfeldt1, D. E. Trilling3, N. J. Turner1 and A. Wolszczan4
Show affiliationsWith the MIPS camera on Spitzer, we have searched for far-infrared emission from dust in the planetary system orbiting pulsar PSR B1257+12. With accuracies of 0.05 mJy at 24 μm and 1.5 mJy at 70 μm, photometric measurements find no evidence for emission at these wavelengths. These observations place new upper limits on the luminosity of dust with temperatures between 20 and 1000 K. They are particularly sensitive to dust temperatures of 100-200 K, for which they limit the dust luminosity to below 3 × 10-5 of the pulsar's spin-down luminosity, 3 orders of magnitude better than previous limits. Despite these improved constraints on dust emission, an asteroid belt similar to the solar system's cannot be ruled out.
circumstellar matter; infrared: stars; pulsars: individual (PSR B1257+12)
Issue 2 (2006 August 1)
Received 2006 January 30, accepted for publication 2006 April 5
G. Bryden et al. 2006 ApJ 646 1038
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