Detection of Jovian seismic waves: a new probe of its interior structure

Gaulme, P.; Schmider, F. X.; Guillot, T.; Jacob, C.

doi:10.1051/0004-6361/201116903

Cited by 71 publications

(137 citation statements)

References 20 publications

(25 reference statements)

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“…The recent data analysis (Gaulme et al 2011) put in evidence the detection of Jovian pulsations conform to the theoretical models. Nevertheless, the identification of the modes on a spherical harmonic basis was unfortunately impossible, because of the low duty cycle and of the atmospheric turbulence.…”

supporting

confidence: 57%

Conception and test of echoes, a spectro-imager dedicated to the seismology of Jupiter

Soulat

Schmider

Robbe-Dubois

et al. 2017

International Conference on Space Optics — ICSO 2012

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Echoes is a project of a spaceborne Doppler Spectro-Imager (DSI) which has been proposed as payload to the JUICE mission project selected in the Cosmic Vision program of the European Space Agency (ESA). It is a Fourier transform spectrometer which measures phase shifts in the interference patterns induced by Doppler shifts of spectral lines reflected at the surface of the planet. Dedicated to the seismology of Jupiter, the instrument is designed to analyze the periodic movements induced by internal acoustic modes of the planet. It will allow the knowledge of the internal structure of Jupiter, in particular of the central region, which is essential for the comprehension of the scenario of the giant planets' formation. The optical design is based on a modified Mach-Zehnder interferometer operating in the visible domain and takes carefully into account the sensitivity of the optical path difference to the temperature. The instrument produces simultaneously four images in quadrature which allows the measurement of the phase without being contaminated by the continuum component of the incident light. We expect a noise level less than 1 cm²s -²μHz -1 in the frequency range [0.5 -10] mHz. In this paper, we present the prototype implemented at the Observatoire de la Côte d'Azur (OCA) in collaboration with Institut d'Astrophysique Spatiale (IAS) to study the real performances in laboratory and to demonstrate the capability to reach the required Technology Readiness Level 5.

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supporting

confidence: 57%

Conception and test of echoes, a spectro-imager dedicated to the seismology of Jupiter

Soulat

Schmider

Robbe-Dubois

et al. 2017

International Conference on Space Optics — ICSO 2012

Self Cite

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“…As part of a 10-day observing run in 2005, the SYMPA instrument was able to produce a power spectrum of Jupiter's oscillations shown in Fig. 3 [13,28]. An excess of acoustic power is observed in the frequency range predicted by theory, as well as the comb-like structure of peaks that is also expected from interior models, thereby confirming Jupiter's global pulsations.…”

Section: Seismology and Giant Planetsmentioning

confidence: 68%

Seismology of Giant Planets: General Overview and Results from theKeplerK2 Observations of Neptune

Gaulme

2017

EPJ Web Conf.

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Abstract. For this invited contribution, I was asked to give an overview about the application of helio and asteroseismic techniques to study the interior of giant planets, and to specifically present the recent observations of Neptune by Kepler K2. Seismology applied to giant planets could drastically change our understanding of their deep interiors, as it has happened with the Earth, the Sun, and many main-sequence and evolved stars. The study of giant planets' composition is important for understanding both the mechanisms enabling their formation and the origins of planetary systems, in particular our own. Unfortunately, its determination is complicated by the fact that their interior is thought not to be homogeneous, so that spectroscopic determinations of atmospheric abundances are probably not representative of the planet as a whole. Instead, the determination of their composition and structure must rely on indirect measurements and interior models. Giant planets are mostly fluid and convective, which makes their seismology much closer to that of solar-like stars than that of terrestrial planets. Hence, helioseismology techniques naturally transfer to giant planets. In addition, two alternative methods can be used: photometry of the solar light reflected by planetary atmospheres, and ring seismology in the specific case of Saturn. The current decade has been promising thanks to the detection of Jupiter's acoustic oscillations with the ground-based imaging-spectrometer SYMPA and indirect detection of Saturn's f -modes in its rings by the NASA Cassini orbiter. This has motivated new projects of ground-based and space-borne instruments that are under development. The K2 observations represented the first opportunity to search for planetary oscillations with visible photometry. Despite the excellent quality of K2 data, the noise level of the power spectrum of the light curve was not low enough to detect Neptune's oscillations. The main results from the K2 observations are the clear detection of the well-known differential rotation of Neptune, measured for the first time through the rotational modulation of its photometry, and the detection of the Sun's oscillations, for the first time in an indirect way in intensity measurements.

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“…In particular, global oscillations have been predicted and searched for in the gas giant Jupiter for quite some time, and it looks like they have finally been securely detected last year by Gaulme et al (2011). Interestingly, the SYMPA instrument, built for and used in that work, has been modelled on similar instruments (GONG and MDI/SOHO) dedicated to solar observations, with observations resulting in a two-dimensional radial velocity map.…”

Section: Giant Planetsmentioning

confidence: 98%

Acoustic and buoyancy modes throughout stellar evolution: Seismic properties of stars at different stellar ages and masses

Schuh

2012

Astron Nachr

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Parameter regions in which stars can become pulsationally unstable are found throughout the Hertzsprung-Russell diagram. Stars of high, intermediate, low, and very low masses may cross various instability regions along their paths of evolutionary sequences. In describing them, I give special consideration to hybrid pulsational characteristics that are particularly valuable for asteroseismic investigations, toṖ measurements that allow us to directly follow the stellar evolutionary changes in some stars, and to new research results that stand out with respect to previous consensus.

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Detection of Jovian seismic waves: a new probe of its interior structure

Cited by 71 publications

References 20 publications

Conception and test of echoes, a spectro-imager dedicated to the seismology of Jupiter

Conception and test of echoes, a spectro-imager dedicated to the seismology of Jupiter

Seismology of Giant Planets: General Overview and Results from theKeplerK2 Observations of Neptune

Acoustic and buoyancy modes throughout stellar evolution: Seismic properties of stars at different stellar ages and masses

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