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Author |
Chen, P. S. |
Title |
Infrared properties of barium stars |
Type |
Journal Article |
Year |
2001 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
372 |
Issue |
1 |
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245-248 |
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0004-6361 |
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RPLAB @ s @ |
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415 |
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Omar, A.; Anantharamaiah, K. R.; Rupen, M.; Rigby, J. |
Title |
VLA detection of OH absorption from the elliptical galaxy NGC 1052 |
Type |
Journal Article |
Year |
2002 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
381 |
Issue |
1 |
Pages |
L29-L32 |
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0004-6361 |
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RPLAB @ s @ |
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435 |
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Hansen, Lene; Jørgensen, H.E.; Nørgaard-Nielsen, Hans Ulrik; Pedersen, Kenneth; Goudfrooij, P.; Linden-Vornle, M.J.D. |
Title |
ISO far-infrared observations of rich galaxy clusters III. Abell 2029, Abell 2052, Abell 2142 |
Type |
Journal Article |
Year |
2000 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
362 |
Issue |
1 |
Pages |
133-137 |
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Abstract |
A sample of five rich galaxy clusters has been mapped by ISO at 60 μm, 100 μm, 135 μm, and 200 μm using the PHT-C camera. In previous papers Abell 2670 and Sersic 159-03 were discussed. Here we present the results for Abell 2029, Abell 2052, and Abell 2142. The conclusion of the survey is that the relatively small fields (approximate to 60 square are minutes) are structured with filaments or superpositions of point sources. In some cases point sources (approximate to 0.1 Jy) can be identified with cluster galaxies. An attempt to demonstrate infrared emission from dust in the cooling flows (due to star formation) was inconclusive. |
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RPLAB @ s @ |
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456 |
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Author |
Käufl, H. U.; Rothermal, H.; Drapatz, S. |
Title |
Investigation of the Martian atmosphere by 10 micron heterodyne spectroscopy |
Type |
Journal Article |
Year |
1984 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
136 |
Issue |
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Pages |
319-325 |
Keywords |
astronomical spectroscopy, atmospheric composition, infrared astronomy, mars atmosphere, spectral line width, carbon dioxide concentration, nonequilibrium thermodynamics, optical heterodyning, planetary radiation, mars, atmosphere, spectroscopy, atmosphere, carbon dioxide, altitude, kinetics, rotation, thermal properties, temperature, emissions, intensity, models, data, spectra |
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449 |
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Author |
Rothermel, H.; Käufl, H. U.; Yu, Y. |
Title |
A heterodyne spectrometer for astronomical measurements at 10 micrometers |
Type |
Journal Article |
Year |
1983 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
126 |
Issue |
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Pages |
387-392 |
Keywords |
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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Author |
Kaeufl, H. U.; Rothermel, H.; Drapatz, S. |
Title |
Indication for H2O in the upper atmosphere of Mars |
Type |
Journal Article |
Year |
1984 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
141 |
Issue |
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Pages |
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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Author |
Rothermel, H.; Käufl, H. U.; Schrey, U.; Drapatz, S. |
Title |
Thermal structure of the Martian mesosphere |
Type |
Journal Article |
Year |
1988 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
196 |
Issue |
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Pages |
296-300 |
Keywords |
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 |
Serial |
450 |
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Author |
Johnson, M. A.; Betz, A. L.; McLaren, R. A.; Townes, C. H.; Sutton, E. C. |
Title |
Nonthermal 10 micron CO2 emission lines in the atmospheres of Mars and Venus |
Type |
Journal Article |
Year |
1976 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
208 |
Issue |
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Pages |
145 |
Keywords |
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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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. |
Title |
Herschel/HIFI detections of hydrides towards AFGL 2591. Envelope emission versus tenuous cloud absorption |
Type |
Journal Article |
Year |
2010 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
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Volume |
521 |
Issue |
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Pages |
L44 (1 to 7) |
Keywords |
HEB mixer applications, HIFI, Herschel |
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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1083 |
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Benz, A. O.; Bruderer, S.; van Dishoeck, E. F.; Stäuber, P.; Wampfler, S. F.; Melchior, M.; Dedes, C.; Wyrowski, F.; Doty, S. D.; van der Tak, F.; Bächtold, W.; Csillaghy, A.; Megej, A.; Monstein, C.; Soldati, M.; 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.; Dieleman, P.; Dominik, C.; Encrenaz, P.; Fich, M.; Fuente, A.; Giannini, T.; Goicoechea, J. R.; de Graauw, Th.; Helmich, F.; Herczeg, G. J.; Herpin, F.; Hogerheijde, M. R.; Jacq, T.; Jellema, W.; 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.; Ossenkopf, V.; Parise, B.; Pearson, J. C.; Plume, R.; Risacher, C.; Santiago-García, J.; Saraceno, P.; Schieder, R.; Shipman, R.; Stutzki, J.; Tafalla, M.; Tielens, A. G. G. M.; van Kempen, T. A.; Visser, R.; Yıldız, U. A. |
Title |
Hydrides in young stellar objects: Radiation tracers in a protostar-disk-outflow system |
Type |
Journal Article |
Year |
2010 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
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Volume |
521 |
Issue |
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Pages |
L35 (1 to 5) |
Keywords |
HEB mixer applications, HIFI, Herschel |
Abstract |
Context. Hydrides of the most abundant heavier elements are fundamental molecules in cosmic chemistry. Some of them trace gas irradiated by UV or X-rays.
Aims. We explore the abundances of major hydrides in W3 IRS5, a prototypical region of high-mass star formation.
Methods. W3 IRS5 was observed by HIFI on the Herschel Space Observatory with deep integration (2500 s) in 8 spectral regions.
Results. The target lines including CH, NH, H3O+, and the new molecules SH+, H2O+, and OH+ are detected. The H2O+ and OH+ J = 1–0 lines are found mostly in absorption, but also appear to exhibit weak emission (P-Cyg-like). Emission requires high density, thus originates most likely near the protostar. This is corroborated by the absence of line shifts relative to the young stellar object (YSO). In addition, H2O+ and OH+ also contain strong absorption components at a velocity shifted relative to W3 IRS5, which are attributed to foreground clouds.
Conclusions. The molecular column densities derived from observations correlate well with the predictions of a model that assumes the main emission region is in outflow walls, heated and irradiated by protostellar UV radiation. |
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