Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995psu..reptq....k&link_type=abstract
Final Report Pennsylvania State Univ., Erie, PA. Div. of Science.
Astronomy and Astrophysics
Astrophysics
Absorption Spectra, Astrophysics, Change Detection, Extremely High Frequencies, Halley'S Comet, Interstellar Chemistry, Molecular Absorption, Molecular Clouds, Spectrum Analysis, Vapor Phases, Water Vapor, Fourier Transformation, Gas Dynamics, Gas-Solid Interactions, Interstellar Matter, Kuiper Airborne Observatory, Michelson Interferometers, Moisture Content, Shock Waves, Spectrometers
Scientific paper
The objective of this research was a search for water molecules in the gas phase in molecular clouds. Water should be among the most abundant gases in the clouds and is of fundamental importance in gas chemistry, cloud cooling, shock wave chemistry, and gas-grain interactions of interstellar dust. Detection of water in Comet Halley in the 2.7 micron v(3) band in 1986 had shown that airborne H2O observations are feasible (ground-based observations of H2O are impossible because of the massive water content of the atmosphere). We planned to observe the v(3) band in interstellar clouds where a number of lines of this band should be in absorption. The search for H2O commenced in 1988 with a two flight program on the KAO. this resulted in a detection of interstellar H2O with S/N of 2-4 in the v(3) 1(01)-2(02) line at 3801.42/cm. A subsequent flight series of two flights in 1989 resulted in confirmation to the 3801.42/cm line detection and the detection of altogether four strong lines in the 000-001 v(3) vibration-rotation band of H2O.
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