1篇
您的检索式：作者名="David B.Jess"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Multi-wavelength observations of the 2014 June 11 M3.9 flare: temporal and spatial characteristics显示文摘We present multi-wavelength observations of an M-class flare(M3.9) that occurred on 2014 June 11.Our observations were conducted with the Dunn Solar Telescope(DST),employing adaptive optics,the multi-camera system Rapid Oscillations in Solar Atmosphere(ROSA),the new Hydrogen-Alpha Rapid Dynamics camera(HARDcam) in various wavelengths,such as Ca II K,Mg I b2(at 5172.7 A),and Hα narrow band and G-band continuum filters.Images were re-constructed using the Kiepenheuer-Institut Speckle Interferometry Package(KISIP) code,to improve our image resolution.We observed intensity increases of ≈120%–150% in the Mg,Ca K and Hα narrow band filters during the flare.Intensity increases for the flare observed in the SDO EUV channels were several times larger,and the X-rays,as recorded by GOES,increased over a factor of 30 for the harder band.Only a modest delay was found between the onset of flare ribbons of a nearby sympathetic flare and the main flare ribbons observed in these narrow band filters.The peak flare emission occurred within a few seconds for the Ca K,Mg and Hα bands.Timedistance techniques indicate propagation velocities of ≈60 km s^-1 for the main flare ribbon and as high as300 km s^-1 for smaller regions,which we attribute to filament eruptions.This result and delays and velocities observed with SDO(≈100 km s^-1) for different coronal heights agree well with the simple model of energy propagation versus height,although a more detailed model for the flaring solar atmosphere is needed.Finally,we detected marginal quasi-periodic pulsations(QPPs) in the 40–60 s range for the Ca K,Mg and Hα bands,and such measurements are important for disentangling the detailed flare-physics. | Damian J.Christian David Kuridze David B.Jess Menoa Yousefi Mihalis Mathioudakis | 2019 | Research in Astronomy and Astrophysics2019，19，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员