First measurements of Jupiter’s zonal winds with visible imaging spectroscopy

Autor: Masahiro Ikoma, Jason Jackiewicz, Thierry Appourchaux, Jean-Pierre Rivet, Ivan Gonçalves, David G. Voelz, Patrick Gaulme, Patrick Boumier, F. X. Schmider, Bun'ei Sato, Shigeru Ida, Raul Morales-Juberias, Djamel Mékarnia, Tristan Guillot, Thomas A. Underwood
Přispěvatelé: Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), New Mexico Institute of Mining and Technology [New Mexico Tech] (NMT), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), NMSU, Dept Astron, Las Cruces, NM USA, Tokyo Institute of Technology [Tokyo] (TITECH), Department of Earth and Planetary Science [Tokyo], The University of Tokyo (UTokyo), Department of Mechanical and Aerospace Engineering [Las Cruces], New Mexico State University, ANR-15-IDEX-0001,UCA JEDI,Idex UCA JEDI(2015), ANR-15-CE31-0014,JOVIAL,Jupiter : Oscillations en Vitesse radiale par ImAgerie multi Longitudes(2015), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Hippolyte Fizeau (FIZEAU), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Max Planck Inst Sonnensyst Forsch, Gottingen, Germany, Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), Tokyo University of Science [Tokyo], ANR: 15-IDEX-0001,UCA JEDI,Idex UCA JEDI(2015), Graduate School of Science [Tokyo], The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo)
Rok vydání: 2019
Předmět:
Solar System
010504 meteorology & atmospheric sciences
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
01 natural sciences
Jovian
Wind speed
symbols.namesake
Wind profile power law
Planet
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
010303 astronomy & astrophysics
ComputingMilieux_MISCELLANEOUS
Astrophysics::Galaxy Astrophysics
0105 earth and related environmental sciences
Spectrometer
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Atmospheric wave
Astronomy
Astronomy and Astrophysics
Fraunhofer lines
13. Climate action
Space and Planetary Science
Physics::Space Physics
symbols
Astrophysics::Earth and Planetary Astrophysics
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Geology
Zdroj: Icarus
Icarus, Elsevier, 2019, 319, pp.795-811. ⟨10.1016/j.icarus.2018.10.019⟩
ISSN: 0019-1035
1090-2643
DOI: 10.1016/j.icarus.2018.10.019
Popis: We present the first measurements of Jupiter’s wind profile ever obtained with Doppler velocity measurements in the visible. Hitherto, knowledge about atmospheric dynamics has been obtained with cloud-tracking techniques, which consist of tracking visible features from images taken at different dates. However, cloud tracking indicates the motion of large cloud structures, which is an indication of the speed of iso-pressure regions, rather than the speed of the actual atmospheric particles. Doppler imaging is as challenging – motions are usually less than 100 m s − 1 – as appealing because it measures the speed of cloud particles instead of large cloud structures. Significant difference could appear in the case of atmospheric waves interfering with cloud structures. Here we present the first scientific results of a Doppler imaging spectrometer that is dedicated to giant-planet seismology and atmospheric dynamics by providing instantaneous line-of-sight-velocity maps of the planets of the solar system. The instrument has been developed in the framework of the projects JOVIAL (Jovian Oscillations through Velocity Images At several Longitudes) and JIVE in NM (Jovian Interiors from Velocimetry Experiment in New Mexico). It is a Fourier transform spectrometer with a fixed optical path difference working in the mid-visible domain, which monitors the position of solar Fraunhofer lines that are reflected in the planets’ upper atmospheres. After describing the instrument principle and the different steps of data reduction, we report measurement of the average zonal wind speed of Jupiter, as a function of latitude, from datasets obtained in 2015 and 2016 with two different telescopes, when the planet was close to its opposition. Our results are consistent between the two years. We compare the results with wind profiles obtained by cloud tracking on HST (Hubble Space Telescope) images taken at the same epoch, and identify a significant discrepancy in the North Equatorial Belt and northern part of the Equatorial Zone.
Databáze: OpenAIRE
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