Spectropolarimetric investigation of Ellerman bomb. II. Photospheric models
|1Kondrashova, NN |
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
|Kinemat. fiz. nebesnyh tel (Online) 2016, 32(2):25-36|
|Start Page: Solar Physics|
Semiempirical photospheric models of Ellerman bomb in active region NOAA 11024 are obtained. The Stokes profiles I, Q, U, V of the photospheric lines obtained from the spectropolarimetric observations of the Ellerman bomb with the French-Italian solar telescope THEMIS (Tenerife, Spain) are used for the modeling. The models are derived from the inversion with SIR code, described by Ruiz Cobo and del Toro Iniesta [Ruiz Cobo, del Toro Iniesta // Astrophys. J.-1992.-398]. The models include two components: a thin magnetic flux tube and nonmagnetic surroundings. The optical depth dependences of the temperature, magnetic field strength, the inclination of the magnetic field vector, and line-of-sight velocity are obtained for the magnetic flux tube. Models show that the thermodynamical parameters of the Ellerman bomb photosphere differ strongly from the parameters of the quiet photosphere. The temperature in a magnetic flux tube had the inhomogeneities with height. The deviation from its values in the quiet photosphere reached 700...900 K. The models show downflows in the lower and upper photosphere. Line-of-sight velocity in the upper layers of the photosphere reached 17 km/s. The magnetic field strength in the models varied from 0.1...0.13 Т in the lower photospheric layers to 0.04...0.07 T in the upper ones. The physical state in the photosphere changed during the observations.
|Keywords: Ellerman bomb, photospheric models, Stokes parameters, the Sun|
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