Výsledky vyhledávání - "Giacomo Lari"

Akademický článek

Determination of Jupiter’s Pole Orientation from Juno Radio Science Data

Autor: Giacomo Lari, Marco Zannoni, Daniele Durante, Ryan S. Park, Giacomo Tommei

Publikováno v: Aerospace, Vol 11, Iss 2, p 124 (2024)

The extreme accuracy of Juno radio science data allows us to perform very precise orbit determination experiments. While previous works focused on the estimation of the gravitational field of Jupiter, in this article, we aim to accurately determine t

Externí odkaz: https://doaj.org/article/a5bf2d6ed66b4978933763d72155105d

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Akademický článek

Juno spacecraft gravity measurements provide evidence for normal modes of Jupiter

Autor: Daniele Durante, Tristan Guillot, Luciano Iess, David J. Stevenson, Christopher R. Mankovich, Steve Markham, Eli Galanti, Yohai Kaspi, Marco Zannoni, Luis Gomez Casajus, Giacomo Lari, Marzia Parisi, Dustin R. Buccino, Ryan S. Park, Scott J. Bolton

Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)

Juno spacecraft experienced unknown accelerations near the closest approach to Jupiter. Here, the authors show that Jupiter’s axially symmetric, north-south asymmetric gravity field measured by Juno is perturbed by a time-variable component, associ

Externí odkaz: https://doaj.org/article/b82ea36e2b554861b641a436db72891d

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Dynamical history of the Galilean satellites for a fast migration of Callisto

Autor: Giacomo Lari, Melaine Saillenfest, Clara Grassi

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2023, 518 (2), pp.3023-3035. ⟨10.1093/mnras/stac3299⟩

The dynamics of the innermost Galilean satellites (Io, Europa and Ganymede) is characterised by a chain of mean motion resonances, called Laplace resonance, and by a strong tidal dissipation that causes wide variations of their semi-major axes over l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f0aaad72184f41686bbe0df7d94d0f5
https://hal.science/hal-03879278

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Orbit determination methods for interplanetary missions: development and use of the Orbit14 software

Autor: Giacomo Lari, Giulia Schettino, Daniele Serra, Giacomo Tommei

Publikováno v: Experimental Astronomy. 53:159-208

In the last years, a new generation of interplanetary space missions have been designed for the exploration of the solar system. At the same time, radio-science instrumentation has reached an unprecedented level of accuracy, leading to a significant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b15ad193c255ac8a5f9940d4177db8ab
https://doi.org/10.1007/s10686-021-09823-8

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The large obliquity of Saturn explained by the fast migration of Titan

Autor: Gwenaël Boué, Giacomo Lari, Melaine Saillenfest

Publikováno v: Nature Astronomy
Nature Astronomy, 2021, 5, pp.345-349. ⟨10.1038/s41550-020-01284-x⟩
Nature Astronomy, Nature Publishing Group, 2021, 5, pp.345-349. ⟨10.1038/s41550-020-01284-x⟩

The obliquity of a planet is the tilt between its equator and its orbital plane. Giant planets are expected to form with near-zero obliquities. After its formation, some dynamical mechanism must therefore have tilted Saturn up to its current obliquit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::115aeef43ab7e655f80cebd0acb132a5
http://arxiv.org/abs/2110.04104

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Future destabilisation of Titan as a result of Saturn’s tilting

Autor: Melaine Saillenfest, Giacomo Lari

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 654, pp.A83. ⟨10.1051/0004-6361/202141467⟩
Astronomy and Astrophysics-A&A, 2021, 654, pp.A83. ⟨10.1051/0004-6361/202141467⟩

Context: As a result of Titan's migration and Saturn's probable capture in secular spin-orbit resonance, recent works show that Saturn's obliquity could be steadily increasing today and may reach large values in the next billions of years. Satellites

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93beabbfb5ce85bec92ba04170e3f51b
https://hal.archives-ouvertes.fr/hal-03375960/file/aa41467-21.pdf

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Tilting Uranus via the migration of an ancient satellite

Autor: Melaine Saillenfest, Zeeve Rogoszinski, Giacomo Lari, Kevin Baillié, Gwenaël Boué, Aurélien Crida, Valéry Lainey

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2022, 668, pp.A108. ⟨10.1051/0004-6361/202243953⟩

Context. The 98{\deg}-obliquity of Uranus is commonly attributed to giant impacts that occurred at the end of the planetary formation. This picture, however, is not devoid of weaknesses. Aims. On a billion-year timescale, the tidal migration of the s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2dbe4ee6f5e43ad3dc55cd0e4889267
https://doi.org/10.1051/0004-6361/202243953

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IMEX_SfloW2D 1.0: a depth-averaged numerical flow model for pyroclastic avalanches

Autor: Giacomo Lari, Tomaso Esposti Ongaro, Mattia de' Michieli Vitturi, Alvaro Aravena

Publikováno v: Geoscientific Model Development, Vol 12, Pp 581-595 (2019)

Pyroclastic avalanches are a type of granular flow generated at active volcanoes by different mechanisms, including the collapse of steep pyroclastic deposits (e.g., scoria and ash cones), fountaining during moderately explosive eruptions, and crumbl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d7bcc9261a6aa0c335786454c0cbdd7
https://www.geosci-model-dev.net/12/581/2019/gmd-12-581-2019.pdf

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The past and future obliquity of Saturn as Titan migrates

Autor: Gwenaël Boué, Melaine Saillenfest, Ariane Courtot, Giacomo Lari

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2021, 647, pp.A92. ⟨10.1051/0004-6361/202039891⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 647, pp.A92. ⟨10.1051/0004-6361/202039891⟩

Aims: It has recently been shown that the fast migration of Titan could be responsible for the current 26.7{\deg}-tilt of Saturn's spin axis. We aim to quantify the level of generality of this result and to measure the most likely sets of parameters.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b75741094bd3d4075528253bf795d097

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Long-term evolution of the Galilean satellites: the capture of Callisto into resonance

Autor: Giacomo Lari, Marco Fenucci, Melaine Saillenfest

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 639, pp.A40. ⟨10.1051/0004-6361/202037445⟩
Astronomy & Astrophysics
Astronomy and Astrophysics-A&A, 2020, 639, pp.A40. ⟨10.1051/0004-6361/202037445⟩

Context. The strong tidal dissipation in the couple Jupiter-Io is spread to all the moons involved in the Laplace resonance (Io, Europa, and Ganymede), leading to a migration of their orbits. Aims. We aim to characterize the future behavior of the Ga

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65eee6f26c14951b4423e1c6cb249946
https://hal.archives-ouvertes.fr/hal-02987249

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