Reference : First results of Herschel-PACS observations of Neptune
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/107601
First results of Herschel-PACS observations of Neptune
English
Lellouch, E. mailto [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Hartogh, P. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Feuchtgruber, H. [Max-Planck-Institut für extraterrestrische Physik, Garching bei München, Germany]
Vandenbussche, B. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
de Graauw, T. [SRON, Groningen, The Netherlands]
Moreno, R. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Jarchow, C. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Cavalié, T. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Orton, G. [JPL, California Institute of Technology, Pasadena, USA]
Banaszkiewicz, M. [Space Research Centre, Polish Academy of Science, Warszawa, Poland]
Blecka, M. I. [Space Research Centre, Polish Academy of Science, Warszawa, Poland]
Bockelée-Morvan, D. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Crovisier, J. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Encrenaz, T. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Fulton, T. [Blue Sky Spectroscopy Inc., Lethbridge, Alberta, Canada]
Küppers, M. [European Space Astronomy Center, Madrid, Spain]
Lara, L. M. [Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain]
Lis, D. C. [California Institute of Technology, Pasadena, USA]
Medvedev, A. S. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Rengel, M. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Sagawa, H. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Swinyard, B. [Rutherford Appleton Laboratory, Oxfordshire, U K]
Szutowicz, S. [Space Research Centre, Polish Academy of Science, Warszawa, Poland]
Bensch, F. [Deutsches Zentrum für Luft- und Raumfahrt (DLR), Bonn, Germany]
Bergin, E. [University of Michigan, Ann Arbor, USA]
Billebaud, F. [Université de Bordeaux, Observatoire Aquitain des Sciences de l'Univers, CNRS, UMR 5804, Laboratoire d'Astrophysique de Bordeaux, France]
Biver, N. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Blake, G. A. [JPL, California Institute of Technology, Pasadena, USA]
Blommaert, J A D L [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Cernicharo, J. [Laboratorio de Astrofísica Molecular, CAB. INTA-CSIC, Spain]
Courtin, R. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Davis, G. R. [Joint Astronomy Center, Hilo, USA]
Decin, L. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Encrenaz, P. [LERMA, Observatoire de Paris, and Univ. Pierre et Marie Curie, Paris, France]
Gonzalez, A. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Kidger, M. [Herschel Science Centre, ESA Centre, Madrid, Spain]
Naylor, D. [University of Lethbridge, Canada]
Portyankina, G. [University of Bern, Switzerland]
Schieder, R. [University of Cologne, Germany]
Sidher, S. [Rutherford Appleton Laboratory, Oxfordshire, U K]
Thomas, N. [University of Bern, Switzerland]
de Val-Borro, M. [Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany]
Verdugo, E. [Herschel Science Centre, ESA Centre, Madrid, Spain]
Waelkens, C. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Walker, H. [Rutherford Appleton Laboratory, Oxfordshire, U K]
Aarts, H. [SRON, Groningen, The Netherlands]
Comito, C. [Max-Planck-Institut für Radioastronomie, Bonn, Germany]
Kawamura, J. H. [JPL, California Institute of Technology, Pasadena, USA]
Maestrini, A. [LERMA, Observatoire de Paris, and Univ. Pierre et Marie Curie, Paris, France]
Peacocke, T. [Experimental Physics Department, National University of Ireland Maynooth, Co. Kildare. Ireland]
Teipen, R. [University of Cologne, Germany]
Tils, T. [University of Cologne, Germany]
Wildeman, K. [SRON, Groningen, The Netherlands]
1-Jul-2010
Astronomy and Astrophysics
EDP Sciences
518
L152
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] planets and satellites: atmospheres ; planets and satellites: individual: Neptune ; planets and satellites: composition ; techniques: spectroscopic
[en] We report on the initial analysis of a Herschel-PACS full range spectrum of Neptune, covering the 51-220 μm range with a mean resolving power of ~3000, and complemented by a dedicated observation of CH[SUB]4[/SUB] at 120 μm. Numerous spectral features due to HD (R(0) and R(1)), H[SUB]2[/SUB]O, CH[SUB]4[/SUB], and CO are present, but so far no new species have been found. Our results indicate that (i) Neptune's mean thermal profile is warmer by ~3 K than inferred from the Voyager radio-occultation; (ii) the D/H mixing ratio is (4.5 ± 1) × 10[SUP]-5[/SUP], confirming the enrichment of Neptune in deuterium over the protosolar value (~2.1 × 10[SUP]-5[/SUP]); (iii) the CH[SUB]4[/SUB] mixing ratio in the mid stratosphere is (1.5 ± 0.2) × 10[SUP]-3[/SUP], and CH[SUB]4[/SUB] appears to decrease in the lower stratosphere at a rate consistent with local saturation, in agreement with the scenario of CH[SUB]4[/SUB] stratospheric injection from Neptune's warm south polar region; (iv) the H[SUB]2[/SUB]O stratospheric column is (2.1 ± 0.5) × 10[SUP]14[/SUP] cm[SUP]-2[/SUP] but its vertical distribution is still to be determined, so the H[SUB]2[/SUB]O external flux remains uncertain by over an order of magnitude; and (v) the CO stratospheric abundance is about twice the tropospheric value, confirming the dual origin of CO suspected from ground-based millimeter/submillimeter observations. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Researchers
http://hdl.handle.net/2268/107601
10.1051/0004-6361/201014600
http://adsabs.harvard.edu/abs/2010A%26A...518L.152L
http://de.arxiv.org/abs/1006.0114

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