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Open AccessFeature PaperArticle

Testing the Steady-State Fluctuation Relation in the Solar Photospheric Convection

1
Università degli Studi di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
2
INAF—Istituto di Astrofisica e Planetologia Spaziali, Via del Fosso del Cavaliere 100, 00133 Rome, Italy
3
Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy
*
Author to whom correspondence should be addressed.
Current address: INAF—Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monte Porzio Catone, Italy.
Entropy 2020, 22(7), 716; https://doi.org/10.3390/e22070716
Received: 16 May 2020 / Revised: 18 June 2020 / Accepted: 21 June 2020 / Published: 28 June 2020
(This article belongs to the Special Issue Entropy Measures and Applications in Astrophysics)
The turbulent thermal convection on the Sun is an example of an irreversible non-equilibrium phenomenon in a quasi-steady state characterized by a continuous entropy production rate. Here, the statistical features of a proxy of the local entropy production rate, in solar quiet regions at different timescales, are investigated and compared with the symmetry conjecture of the steady-state fluctuation theorem by Gallavotti and Cohen. Our results show that solar turbulent convection satisfies the symmetries predicted by the fluctuation relation of the Gallavotti and Cohen theorem at a local level. View Full-Text
Keywords: fluctuation theorems; non-equilibrium stationary state; convection; astrophysical fluid dynamics; Sun; photosphere; spectroscopy fluctuation theorems; non-equilibrium stationary state; convection; astrophysical fluid dynamics; Sun; photosphere; spectroscopy
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Viavattene, G.; Consolini, G.; Giovannelli, L.; Berrilli, F.; Del Moro, D.; Giannattasio, F.; Penza, V.; Calchetti, D. Testing the Steady-State Fluctuation Relation in the Solar Photospheric Convection. Entropy 2020, 22, 716.

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