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Nonlinear force-free field modeling of the solar magnetic carpet and comparison with SDO/HMI and Sunrise/IMaX observations

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dc.contributor.author Pradeep Chitta, L
dc.contributor.author Kariyappa, K
dc.contributor.author van Ballegooijen, A. A
dc.contributor.author DeLuca, E. E
dc.contributor.author Solanki, S. K
dc.date.accessioned 2014-08-21T08:54:05Z
dc.date.available 2014-08-21T08:54:05Z
dc.date.issued 2014
dc.identifier.citation The Astrophysical Journal, Accepted en
dc.identifier.uri http://hdl.handle.net/2248/6644
dc.description Open Access en
dc.description.abstract In the quiet solar photosphere, the mixed polarity fields form a magnetic carpet, which continuously evolves due to dynamical interaction between the convective motions and magnetic field. This interplay is a viable source to heat the solar atmosphere. In this work, we used the line-of-sight (LOS) magnetograms obtained from the Helioseismic and Magnetic Imager (HMI) on the Solar Dynamics Observatory(SDO), and the Imaging Magnetograph eXperiment (IMaX) instrument on the Sunrise balloon-borne observatory, as time dependent lower boundary conditions, to study the evolution of the coronal magnetic field. We use a magneto-frictional relaxation method, including hyperdiffusion, to produce time series of three-dimensional (3D) nonlinear force-free fields from a sequence of photospheric LOS magnetograms. Vertical flows are added up to a height of 0.7 Mm in the modeling to simulate the non-force-freeness at the photosphere-chromosphere layers. Among the derived quantities, we study the spatial and temporal variations of the energy dissipation rate, and energy flux. Our results show that the energy deposited in the solar atmosphere is concentrated within 2 Mm of the photosphere and there is not sufficient energy flux at the base of the corona to cover radiative and conductive losses. Possible reasons and implications are discussed. Better observational constraints of the magnetic field in the chromosphere are crucial to understand the role of the magnetic carpet in coronal heating. en
dc.language.iso en en
dc.publisher IOP Publishing en
dc.rights © IOP Publishing en
dc.subject Sun: Photospher en
dc.subject Sun: Magnetic Fields en
dc.subject un: Atmosphere en
dc.subject n: Corona en
dc.title Nonlinear force-free field modeling of the solar magnetic carpet and comparison with SDO/HMI and Sunrise/IMaX observations en
dc.type Article en

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