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Spatial distribution of water in the stratosphere of Jupiter from observations with the Herschel space observatory

hal.structure.identifierSSE 2013
dc.contributor.authorCAVALIÉ, T.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorFEUCHTGRUBER, H.
dc.contributor.authorLELLOUCH, E.
hal.structure.identifierMax-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
dc.contributor.authorDE VAL-BORRO, M.
dc.contributor.authorJARCHOW, C.
hal.structure.identifierCenter for Medical Imaging Science and Visualization - Dept. of Medical and Health Sciences
dc.contributor.authorMORENO, R.
hal.structure.identifierMax-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research [MPS]
dc.contributor.authorHARTOGH, P.
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorORTON, G.
hal.structure.identifierSouthwest Research Institute [San Antonio] [SwRI]
dc.contributor.authorGREATHOUSE, T. K.
hal.structure.identifierSSE 2013
dc.contributor.authorBILLEBAUD, F.
hal.structure.identifierSSE 2013
dc.contributor.authorDOBRIJEVIC, M.
dc.contributor.authorLARA, L. M.
dc.contributor.authorGONZALEZ, A.
dc.contributor.authorSAGAWA, H.
dc.date.issued2013-09
dc.date.conference2013
dc.description.abstractEnWater in the atmospheres of the outer planets has both an internal and an external source (e.g., [1] and [2] for Jupiter). These sources are separated by a condensation layer, the tropopause cold trap, which acts as a transport barrier between the troposphere and the stratosphere. Thus, the water vapor observed by the Infrared Space Observatory (ISO) in the stratosphere of the giant planets has an external origin [3]. This external supply of water may have several sources: (i) a permanent flux from interplanetary dust particles produced from asteroid collisions and from comet activity [4], (ii) local sources from planetary environments (rings, satellites) [5], (iii) cometary "Shoemaker-Levy 9 (SL9) type" impacts [6]. In the past 15 years, several studies suggested that water in the stratosphere of Jupiter originated from the SL9 comet impacts in July 1994, but a direct proof was missing. We will report the first high S/N spatially resolved mapping observations of water in Jupiter's stratosphere carried out with the Heterodyne Instrument for the Far Infrared (HIFI) [7] and Photodetector Array Camera and Spectrometer (PACS) [8] instruments onboard the ESA Herschel Space Observatory [9]. These observations have been obtained in the framework of the Guaranteed Time Key Program "Water and related chemistry in the Solar System", also known as "Herschel Solar System Observations" (HssO) [10]. In parallel, we have monitored Jupiter's stratospheric temperature with the NASA Infrared Telescope Facility (IRTF) to separate temperature from water variability. We will present the results recently published by our team [11]. Water is found to be restricted to pressures lower than 2mbar. Its column density decreases by a factor of 2-3 between southern and northern latitudes (see Fig. 1), consistently between the HIFI and the PACS 66.4μm maps. Latitudinal temperature variability cannot explain the global north-south asymmetry in the water maps. From the latitudinal and vertical distributions of water in Jupiter's stratosphere, we rule out interplanetary dust particles as its main source. Furthermore, we demonstrate that Jupiter's stratospheric water was delivered by the SL9 comet and that more than 95% of the observed water comes from the comet according to our models. On the longer term, this study can be regarded as a preparation of the observations to be performed by the SubmillimetreWave Instrument (SWI) [12]. SWI is an instrument proposed for the payload of the Jupiter Icy Moon Explorer (JUICE). This instrument will observe water and the other SL9-derived species in Jupiter with a higher spatiotemporal resolution than Herschel to constrain its 3D stratospheric circulation.
dc.language.isoen
dc.source.titleEuropean Planetary Science Congress 2013, held 8-13 September in London, UK. Online at: http://meetings.copernicus.org/epsc2013, id.EPSC2013-62
dc.title.enSpatial distribution of water in the stratosphere of Jupiter from observations with the Herschel space observatory
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.journalEuropean Planetary Science Congress 2013
bordeaux.page62
bordeaux.volume8
bordeaux.countryGB
bordeaux.title.proceedingEuropean Planetary Science Congress 2013, held 8-13 September in London, UK. Online at: http://meetings.copernicus.org/epsc2013, id.EPSC2013-62
bordeaux.conference.cityLondon
bordeaux.peerReviewedoui
hal.identifierhal-00944196
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00944196v1
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