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The Heterodyne Instrument for the Far Infrared (HIFI) aboard the Herschel Space Observatory has acquired high-resolution broadband molecular spectra of star-forming regions in a wavelength range that is mostly inaccessible from ground-based astronomical observatories. These spectral surveys provide new insight into the chemical composition and physical properties of molecular clouds. In this manuscript,...
We present the first detections of the ground-state H 216 O (110–101) rotational transition (at 556.9 GHz) and the 13 CO (5–4) rotational transition from the atmosphere of Venus, measured with the Submillimeter Wave Astronomy Satellite (SWAS). The observed spectral features of these submillimeter transitions originate primarily from the 70–100 km altitude range, within the Venus...
The dramatic growth and evolution of the 2001 martian global dust storm were captured using the Submillimeter Wave Astronomy Satellite (SWAS). While the lower and middle atmosphere (pressures greater than 50 μbar, up to ∼45 km altitude) showed rapid heating of up to 40 K, the average surface brightness temperature plummeted by ∼20 K at the peak of the storm. The storm appears to have had little impact...
We have monitored the 1 10 -1 01 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 3.2x10 28 s -1 on 1999 September 5-8 to...
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