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Using both the Very Large Array (VLA) at 7mm wavelength, and the AustraliaTelescope Compact Array (ATCA) at 3mm, we have searched for microwave emissionfrom from cool dust in the extrasolar planetary system Gliese 876 (Gl 876).Having detected no emission above our 3-sigma detection threshold of 135microJy, we rule out any dust disk with either a mass greater than 0.0006 Earthmasses or less than ~250 AU across. This result improves on previous detectionaperture thresholds an order of magnitude greater, and it has some implicationsfor the dynamical modeling of the system. It also is consistent with theGreaves et al. hypothesis that relates the presence of a debris disk toclose-in planets. Due to the dust-planetesimal relationship, our null resultmay also provide a constraint on the population or composition of the dust andsmall bodies around this nearby M dwarf.

Further Constraints on the Presence of a Debris Disk in the Multiplanet System Gliese 876