Paper:	Planets Around the Pulsar PSR B1257+12
Volume:	398, Extreme Solar Systems
Page:	3
Authors:	Wolszcan, A.
Abstract:	Progress in the study of the three known planets around the millisecond radio pulsar, PSR B1257+12, and in the searches for a dusty disk around it, are discussed and related to relevant issues in astronomy of planets around normal stars. The unambiguous determination of true masses and orbital inclinations of the two larger planets in the PSR B1257+12 system has been achieved by means of modeling their mean motion resonance condition. An approximate coplanarity of the orbits of these terrestrial-mass planets points to a disk origin of the system. Currently available upper limits on infrared emission from dust around the pulsar do not exclude a possible existence of a low-mass disk or an asteroid belt around it.

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