Submillimeter Continuum Observations of Comet Hyakutake (1196 B2)

Details Submillimeter Continuum Observations of Comet Hyakutake (1196 B2) Submillimeter Continuum Observations of Comet Hyakutake (1196 B2)

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aj....113.1145j&link_type=abstract

Astronomical Journal v.113, p.1145

Astronomy and Astrophysics

Astronomy

24

Scientific paper

We report submillimeter continuum observations of comet Hyakutake (1996 B2) in the wavelength range 350≤λ≤2000 μm. Submillimeter continuum emanates primarily from large (millimeter sized), solid particles in the coma. C/Hyakutake was the strongest source of cometary submillimeter radiation observed to date, allowing new measurements of unprecedented quality. The equivalent blackbody cross section at 800 μm is (1.16±0.l2)×102km2, corresponding to a dust mass M≍1.8×109 kg and a dust mass production rate M/dt≍=2.8×l04 kg s-1. The gradient of the emission spectrum is relatively flat, with an opacity index Β=.89±0.10. The cometary P is comparable to values measured in the circumstellar disks of young stars. A small map at 800 μm shows a coma radial surface brightness variation that is compatible with steady emission of solids from the nucleus on timescales ≍0.7 day.

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