0000000000343181

AUTHOR

E. Tajfirouze

showing 2 related works from this author

EUV FLICKERING OF SOLAR CORONAL LOOPS: A NEW DIAGNOSTIC OF CORONAL HEATING

2016

A previous work of ours found the best agreement between EUV light curves observed in an active region core (with evidence of super-hot plasma) and those predicted from a model with a random combination of many pulse-heated strands with a power-law energy distribution. We extend that work by including spatially resolved strand modeling and by studying the evolution of emission along the loops in the EUV 94 angstrom and 335 angstrom channels of the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Using the best parameters of the previous work as the input of the present one, we find that the amplitude of the random fluctuations driven by the random heat pulses increases …

Physics010504 meteorology & atmospheric sciencesPixelSun: coronaExtreme ultraviolet lithographyFOS: Physical sciencesAstronomy and AstrophysicsPlasmaCoronal loopLight curve01 natural sciencesComputational physicsCore (optical fiber)AmplitudeAstrophysics - Solar and Stellar AstrophysicsSun: activitySpace and Planetary Science0103 physical sciences010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Randomness0105 earth and related environmental sciencesThe Astrophysical Journal
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TIME-RESOLVED EMISSION FROM BRIGHT HOT PIXELS OF AN ACTIVE REGION OBSERVED IN THE EUV BAND WITH SDO/AIA AND MULTI-STRANDED LOOP MODELING

2015

Evidence for small amounts of very hot plasma has been found in active regions and might be the indication of an impulsive heating, released at spatial scales smaller than the cross section of a single loop. We investigate the heating and substructure of coronal loops in the core of one such active region by analyzing the light curves in the smallest resolution elements of solar observations in two EUV channels (94 A and 335 A) from the Atmospheric Imaging Assembly on-board the Solar Dynamics Observatory. We model the evolution of a bundle of strands heated by a storm of nanoflares by means of a hydrodynamic 0D loop model (EBTEL). The light curves obtained from the random combination of tho…

PhysicsPixelSun: coronaExtreme ultraviolet lithographyFOS: Physical sciencesAstronomy and AstrophysicsPlasmaCoronal loopAstronomy and AstrophysicLight curveSun: UV radiationPower lawNanoflaresComputational physicsSettore FIS/05 - Astronomia E AstrofisicaAstrophysics - Solar and Stellar AstrophysicsSun: activitySpace and Planetary ScienceSubstructureSolar and Stellar Astrophysics (astro-ph.SR)
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