Reference : HIFI observations of water in the atmosphere of comet C/2008 Q3 (Garradd)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/80845
HIFI observations of water in the atmosphere of comet C/2008 Q3 (Garradd)
English
Hartogh, P. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Crovisier, J. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
de Val-Borro, M. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Bockelée-Morvan, D. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Biver, N. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Lis, D. C. [California Institute of Technology, Pasadena, CA 91125, USA]
Moreno, R. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Jarchow, C. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Rengel, M. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Emprechtinger, M. [California Institute of Technology, Pasadena, CA 91125, USA]
Szutowicz, S. [Space Research Centre, Polish Academy of Sciences, Warsaw, Poland]
Banaszkiewicz, M. [Space Research Centre, Polish Academy of Sciences, Warsaw, Poland]
Bensch, F. [DLR, German Aerospace Centre, Bonn-Oberkassel, Germany]
Blecka, M. I. [Space Research Centre, Polish Academy of Sciences, Warsaw, Poland]
Cavalié, T. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Encrenaz, T. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Küppers, M. [Rosetta Science Operations Centre, European Space Astronomy Centre, European Space Agency, Spain]
Lara, L*-M [Instituto de Astrofísica de Andalucía (CSIC), Spain]
Lellouch, E. [LESIA, Observatoire de Paris, 5 place Jules Janssen, 92195 Meudon, France]
Swinyard, B. M. [Space Science & Technology Department, Rutherford Appleton Laboratory, UK]
Vandenbussche, B. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Bergin, E. A. [Astronomy Department, University of Michigan, USA]
Blake, G. A. [California Institute of Technology, Pasadena, CA 91125, USA]
Blommaert, J A D L [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Cernicharo, J. [Laboratory of Molecular Astrophysics, CAB-CSIC, INTA, Spain]
Decin, L. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium ; Sterrenkundig Instituut Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 Amsterdam, The Netherlands]
Encrenaz, P. [LERMA, Observatoire de Paris, France]
de Graauw, T. [SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD, Groningen, The Netherlands; Leiden Observatory, University of Leiden, The Netherlands; Joint ALMA Observatory, Chile]
Hutsemekers, Damien mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Kidger, M. [Herschel Science Centre, European Space Astronomy Centre, European Space Agency, Spain]
Manfroid, Jean mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Medvedev, A. S. [Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany]
Naylor, D. A. [Department of Physics and Astronomy, University of Lethbridge, Canada]
Schieder, R. [1st Physics Institute, University of Cologne, Germany]
Thomas, N. [> >]
Waelkens, C. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Belgium]
Roelfsema, P. R. [SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD, Groningen, The Netherlands]
Dieleman, P. [SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD, Groningen, The Netherlands]
Güsten, R. [Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany]
Klein, T. [Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany]
Kasemann, C. [Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany]
Caris, M. [Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany]
Olberg, M. [Chalmers University of Technology, 412 96 Göteborg, Sweden; SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD, Groningen, The Netherlands]
Benz, A. O. [Institute of Astronomy, ETH Zürich, 8093 Zürich, Switzerland]
1-Jul-2010
Astronomy and Astrophysics
518
Letters
150, pp. 1-5
Yes
International
[en] comets: individual: C/2008 Q3 ; radio lines: general ; submillimeter: general ; techniques: spectroscopic
[en] High-resolution far-infrared and sub-millimetre spectroscopy of water lines is an important tool to understand the physical and chemical properties of cometary atmospheres. We present observations of several rotational ortho- and para-water transitions in comet C/2008 Q3 (Garradd) performed with HIFI on Herschel. These observations have provided the first detection of the 2[SUB]12[/SUB]-1[SUB]01[/SUB] (1669 GHz) ortho and 1[SUB]11[/SUB]-0[SUB]00[/SUB] (1113 GHz) para transitions of water in a cometary spectrum. In addition, the ground-state transition 1[SUB]10[/SUB]-1[SUB]01[/SUB] at 557 GHz is detected and mapped. By detecting several water lines quasi-simultaneously and mapping their emission we can constrain the excitation parameters in the coma. Synthetic line profiles are computed using excitation models which include excitation by collisions, solar infrared radiation, and radiation trapping. We obtain the gas kinetic temperature, constrain the electron density profile, and estimate the coma expansion velocity by analyzing the map and line shapes. We derive water production rates of 1.7-2.8 × 10[SUP]28[/SUP] s[SUP]-1[/SUP] over the range r[SUB]h[/SUB] = 1.83-1.85 AU. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Figure 5 is only available in electronic form at <A href="http://www.aanda.org">http://www.aanda.org</A>
Researchers
http://hdl.handle.net/2268/80845
10.1051/0004-6361/201014665
http://adsabs.harvard.edu/abs/2010A%26A...518L.150H
http://de.arxiv.org/abs/1005.2969

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