EMERGENCE OF GRANULAR-SIZED MAGNETIC BUBBLES THROUGH THE SOLAR ATMOSPHERE. II. NON-LTE CHROMOSPHERIC DIAGNOSTICS AND INVERSIONS
- 8 September 2015
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 810 (2), 145
- https://doi.org/10.1088/0004-637x/810/2/145
Abstract
Magnetic flux emergence into the outer layers of the Sun is a fundamental mechanism for releasing energy into the chromosphere and the corona. In this paper, we study the emergence of granular-sized flux concentrations and the structuring of the corresponding physical parameters and atmospheric diagnostics in the upper photosphere and in the chromosphere. We make use of a realistic 3D MHD simulation of the outer layers of the Sun to study the formation of the Ca ii 8542 line. We also derive semi-empirical 3D models from non-LTE inversions of our observations. These models contain information on the line-of-sight stratifications of temperature, velocity, and the magnetic field. Our analysis explains the peculiar Ca ii 8542 Å profiles observed in the flux emerging region. Additionally, we derive detailed temperature and velocity maps describing the ascent of a magnetic bubble from the photosphere to the chromosphere. The inversions suggest that, in active regions, granular-sized bubbles emerge up to the lower chromosphere where the existing large-scale field hinders their ascent. We report hints of heating when the field reaches the chromosphere.This publication has 65 references indexed in Scilit:
- CHROMOSPHERIC DIAGNOSIS WITH Ca II LINES: FORWARD MODELING IN FORWARD SCATTERING. IThe Astrophysical Journal, 2015
- CLUSTERS OF SMALL ERUPTIVE FLARES PRODUCED BY MAGNETIC RECONNECTION IN THE SUNThe Astrophysical Journal Letters, 2014
- Doppler Shifts of the Hα Line and the Ca ii 854.2 nm Line in a Quiet Region of the Sun Observed with the FISS/NSTSolar Physics, 2013
- SCATTERING POLARIZATION IN THE Ca II INFRARED TRIPLET WITH VELOCITY GRADIENTSThe Astrophysical Journal, 2012
- The magnetic flux of the quiet Sun internetwork as observed with the Tenerife infrared polarimeterAstronomy & Astrophysics, 2009
- Solar Surface Emerging Flux Regions: A Comparative Study of Radiative MHD Modeling andHinodeSOT ObservationsThe Astrophysical Journal, 2008
- Heavy calcium in CP starsMonthly Notices of the Royal Astronomical Society, 2007
- The origin of the reversed granulation in the solar photosphereAstronomy & Astrophysics, 2006
- The calcium isotopic anomaly in magnetic CP starsAstronomy & Astrophysics, 2005
- The Ca II infrared triplet as indicator of anomalous Ca isotopic mixture in HgMn starsAstronomy & Astrophysics, 2004