Mg II Lines Observed During the X-class Flare on 29 March 2014 by the Interface Region Imaging Spectrograph

0472786 - ASÚ 2017 RIV NL eng J - Journal Article
Liu, Wenjuan - Heinzel, Petr - Kleint, L. - Kašparová, Jana
Mg II Lines Observed During the X-class Flare on 29 March 2014 by the Interface Region Imaging Spectrograph.
Solar Physics. Roč. 290, č. 12 (2015), s. 3525-3543. ISSN 0038-0938. E-ISSN 1573-093X
Grant - others:EC(XE) 606862
Program: FP7
Institutional support: RVO:67985815
Keywords : flares * spectrum * dynamics
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 2.862, year: 2015
Method of publishing: Limited access
https://doi.org/10.1007/s11207-015-0814-9

In this article, we studied the Mg ii lines observed during the X1 flare on 29 March 2014 (SOL2014-03-29T17:48) by the Interface Region Imaging Spectrograph (IRIS). IRIS detected large intensity enhancements of the Mg ii h and k lines, subordinate triplet lines, and several other metallic lines at the flare footpoints during this flare. We have used the advantage of the slit-scanning mode (rastering) of IRIS and performed, for the first time, a detailed analysis of spatial and temporal variations of the spectra. Moreover, we were also able to identify positions of strongest hard X-ray (HXR) emissions using the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observations and to correlate them with the spatial and temporal evolution of IRIS Mg ii spectra. We calculated the synthetic Mg ii spectra by using our non-LTE radiative transfer code and flare models, and compare it with observations.
Permanent Link: http://hdl.handle.net/11104/0270009