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Rothermel, H.; Käufl, H. U.; Schrey, U.; Drapatz, S. |
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Title |
Thermal structure of the Martian mesosphere |
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1988 |
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Astron. Astrophys. |
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A&A |
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196 |
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296-300 |
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atmospheric temperature, carbon dioxide, infrared spectroscopy, mars atmosphere, mesosphere, emission spectra, line spectra, spatial resolution, mars, atmosphere, mesosphere, structure, thermal properties, spectra, spectroscopy, earth-based observations, temperature, patterns, infrared, polar regions, wavelengths, equipment, procedure, carbon dioxide, emissions |
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Rothermel1988 |
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450 |
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Johnson, M. A.; Betz, A. L.; McLaren, R. A.; Townes, C. H.; Sutton, E. C. |
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Title |
Nonthermal 10 micron CO2 emission lines in the atmospheres of Mars and Venus |
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Journal Article |
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1976 |
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Astron. Astrophys. |
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A&A |
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208 |
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145 |
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carbon dioxide, emission spectra, infrared spectra, mars atmosphere, nonthermal radiation, optical heterodyning, planetary radiation, venus atmosphere, absorption spectra, energy transfer, line spectra, molecular absorption, molecular collisions, near infrared radiation, solar flux |
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ref1976ApJ...208L.145J |
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451 |
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Kaeufl, H. U.; Rothermel, H.; Drapatz, S. |
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Title |
Indication for H2O in the upper atmosphere of Mars |
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Journal Article |
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Year |
1984 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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141 |
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430-432 |
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atmospheric moisture, mars atmosphere, upper atmosphere, water vapor, carbon dioxide, emission spectra, nonequilibrium thermodynamics, polar regions |
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452 |
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Rothermel, H.; Käufl, H. U.; Yu, Y. |
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A heterodyne spectrometer for astronomical measurements at 10 micrometers |
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1983 |
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Astron. Astrophys. |
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A&A |
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126 |
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387-392 |
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astronomical spectroscopy, infrared astronomy, infrared spectrometers, optical heterodyning, infrared telescopes, laser spectrometers, mars (planet), venus (planet) |
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453 |
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Bruderer, S.; Benz, A. O.; van Dishoeck, E. F.; Melchior, M.; Doty, S. D.; van der Tak, F.; Stäuber, P.; Wampfler, S. F.; Dedes, C.; Yıldız, U. A.; Pagani, L.; Giannini, T.; de Graauw, Th.; Whyborn, N.; Teyssier, D.; Jellema, W.; Shipman, R.; Schieder, R.; Honingh, N.; Caux, E.; Bächtold, W.; Csillaghy, A.; Monstein, C.; Bachiller, R.; Baudry, A.; Benedettini, M.; Bergin, E.; Bjerkeli, P.; Blake, G. A.; Bontemps, S.; Braine, J.; Caselli, P.; Cernicharo, J.; Codella, C.; Daniel, F.; di Giorgio, A. M.; Dominik, C.; Encrenaz, P.; Fich, M.; Fuente, A.; Goicoechea, J. R.; Helmich, F.; Herczeg, G. J.; Herpin, F.; Hogerheijde, M. R.; Jacq, T.; Johnstone, D.; Jørgensen, J. K.; Kristensen, L. E.; Larsson, B.; Lis, D.; Liseau, R.; Marseille, M.; McCoey, C.; Melnick, G.; Neufeld, D.; Nisini, B.; Olberg, M.; Parise, B.; Pearson, J. C.; Plume, R.; Risacher, C.; Santiago-García, J.; Saraceno, P.; Shipman, R.; Tafalla, M.; van Kempen, T. A.; Visser, R.; Wyrowski, F. |
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Title |
Herschel/HIFI detections of hydrides towards AFGL 2591. Envelope emission versus tenuous cloud absorption |
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2010 |
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Astron. Astrophys. |
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521 |
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L44 (1 to 7) |
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HEB mixer applications, HIFI, Herschel |
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Abstract |
The Heterodyne Instrument for the Far Infrared (HIFI) onboard the Herschel Space Observatory allows the first observations of light diatomic molecules at high spectral resolution and in multiple transitions. Here, we report deep integrations using HIFI in different lines of hydrides towards the high-mass star forming region AFGL 2591. Detected are CH, CH+, NH, OH+, H2O+, while NH+ and SH+ have not been detected. All molecules except for CH and CH+ are seen in absorption with low excitation temperatures and at velocities different from the systemic velocity of the protostellar envelope. Surprisingly, the CH(JF,P = 3/22,- – 1/21,+ ) and CH+(J = 1–0, J = 2–1) lines are detected in emission at the systemic velocity. We can assign the absorption features to a foreground cloud and an outflow lobe, while the CH and CH+ emission stems from the envelope. The observed abundance and excitation of CH and CH+ can be explained in the scenario of FUV irradiated outflow walls, where a cavity etched out by the outflow allows protostellar FUV photons to irradiate and heat the envelope at larger distances driving the chemical reactions that produce these molecules. |
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