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2篇 您的检索式：作者名="S.Krishna Prasad"

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		题名	作者	年代	出处	被引量
	1	Propagating disturbances along a coronal loop from simultaneous EUV imaging and spectroscopic observations显示文摘Propagating disturbances(PDs) were studied along an active region loop using simultaneous imaging and spectroscopy. An image sequence recorded in the Fe Ⅸ/Fe X 171  channel, from TRACE and spectral data in the Si Ⅻ 520.6  line obtained from CDS/SOHO, are analyzed. A space-time map constructed from the TRACE image sequence shows the presence of PDs close to the loop foot point propagating with an apparent speed of 39 km s-1. The periodicity was found to be 5.4 min.The corresponding spectroscopic data from CDS, at a location away from the foot point, show oscillations in all three line parameters roughly at the same period. At locations farther from the foot point, the line width oscillation seems to disappear while the Doppler velocity oscillation becomes prominent. We attribute this to the signature of propagating slow waves that get affected by flows/other events close to the foot point. Spectral line profiles do not show much asymmetry, however, it is difficult to infer anything due to the broadened Gaussian shape of the CDS line profiles.	Ajanta Datta S.Krishna Prasad Dipankar Banerjee	2015	Research in Astronomy and Astrophysics2015，15，7：	0
	2	Propagating disturbances along fan-like coronal loops in an active region显示文摘Propagating disturbances are often observed in active region fan-like coronal loops. They were thought to be due to slow mode magnetohydrodynamic waves based on some of the observed properties. However, recent studies involving spectroscopy indicate that they could be due to high speed quasi-periodic upflows which are difficult to distinguish from upward propagating slow waves. In this context, we have studied a fan loop structure in the active region AR 11465 using simultaneous spectroscopic and imaging observations from the Extreme Ultraviolet Imaging Spectrometer onboard Hinode and Atmospheric Imaging Assembly onboard Solar Dynamics Observatory. Analysis of the data shows significant oscillations at different locations. We explore the variations in different line parameters to determine whether the waves or flows could cause these oscillations to improve the current understanding of the nature of these disturbances.	Sudip Mandal Tanmoy Samanta Dipankar Banerjee S.Krishna Prasad Luca Teriaca	2015	Research in Astronomy and Astrophysics2015，15，11：	0

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