Observational consequences of the local re-acceleration thick-target model

Eclipse on the Coral Sea: Cycle 24 Ascending

物理学;天文学

Varady, M.^1 ; Moravec, Z.^1 ; Karlický, M.^2 ; Kaparová, J.^2

Faculty of Science, J.E. Purkyn University, Physics Department, Çeské mládeze 8, 400 75 Ústí nad Labem, Czech Republic^1

Astronomical Institute of the Academy of Sciences of the Czech Republic, V.v.i., 251 65 Ondejov, Czech Republic^2

关键词: Collisional;    Foot points;    Hard X-ray sources;    Re-acceleration;    Solar flare;    Test-particle approach;    Thick target;    Vertical size;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/440/1/012013/pdf
DOI  :  10.1088/1742-6596/440/1/012013

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

In our contribution we compare the efficiency of the hard X-ray production and the vertical sizes and positions of the hard X-ray sources for the classical collisional thick-target model and for its recently proposed modification, the local re-acceleration thick-target model. The latter model has been proposed in order to ease some of the severe theoretical problems of the collisional thick-target model related to interpretation of the observational properties of the foot-point HXR sources in solar flares. The results are obtained using a relativistic test-particle approach for a fully ionised atmosphere with a converging magnetic field and a single (compact) flare loop.