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Title: Comparison of physical properties of quiet and active regions through the analysis of magnetohydrodynamic simulations of the solar photosphere

Recent observations have shown that the photometric and dynamic properties of granulation and small-scale magnetic features depend on the amount of magnetic flux of the region they are embedded in. We analyze results from numerical hydrodynamic and magnetohydrodynamic simulations characterized by different amounts of average magnetic flux and find qualitatively the same differences as those reported from observations. We show that these different physical properties result from the inhibition of convection induced by the presence of the magnetic field, which changes the temperature stratification of both quiet and magnetic regions. Our results are relevant for solar irradiance variations studies, as such differences are still not properly taken into account in irradiance reconstruction models.
Authors:
 [1]
  1. National Solar Observatory, Sacramento Peak, P.O. Box 62, Sunspot, NM 88349 (United States)
Publication Date:
OSTI Identifier:
22342022
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPARATIVE EVALUATIONS; CONVECTION; GRANULATION; MAGNETIC FIELDS; MAGNETIC FLUX; PHOTOSPHERE; PHYSICAL PROPERTIES; RADIANT FLUX DENSITY; RADIANT HEAT TRANSFER; SIMULATION; STRATIFICATION; SUN; VARIATIONS