Post-perihelion SWAS Observations of Water Vapor in the Coma of Comet C/1999 H1 (Lee)

Details Post-perihelion SWAS Observations of Water Vapor in the Coma of Comet C/1999 H1 (Lee) Post-perihelion SWAS Observations of Water Vapor in the Coma of Comet C/1999 H1 (Lee)

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icar..154..345c&link_type=abstract

Icarus, Volume 154, Issue 2, pp. 345-349 (2001).

Astronomy and Astrophysics

Astronomy

15

Scientific paper

We have monitored the 110-101 pure rotational transition of water vapor near 557 GHz toward Comet C/1999 H1 (Lee) over the period 1999 September 5 through 1999 December 8, using the Submillimeter Wave Astronomy Satellite. The measured antenna temperatures implied water production rates that declined from 3.2×1028s-1 on 1999 September 5-8 to 1.2×1028s-1 on 1999 September 25-28. No statistically significant detections of water emission were obtained after 1999 September 28. These post-perihelion observations are consistent with a steady decline in the water production rate, Q(H2O), with increasing heliocentric distance, Rh, that can be fit with a power law Q(H2O)=1.45×1029(Rh/AU)- 5.5s-1 over the range Rh=1.3-1.7 AU. .

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