Cooler and Hotter X-ray Bright Points from Hinode/XRT Observations

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/6175

Title:	Cooler and Hotter X-ray Bright Points from Hinode/XRT Observations
Authors:	Kariyappa, R DeLuca, E. E Saar, S. H Golub, L Dame, L Varghese, B. A
Issue Date:	Aug-2012
Publisher:	Astronomical Society of the Pacific
Citation:	Astronomical Society of the Pacific Conference Series, Vol. 454, pp. 149-152
Series/Report no.:	Astronomical Society of the Pacific Conference Series, Vol. 454
Abstract:	We use a 7-hour (17:00 UT - 24:00 UT) time sequence of soft X-ray images observed almost simultaneously in two filters (Ti_poly and Al_mesh) on April 14, 2007 with X-Ray Telescope (XRT) on-board the Hinode mission to determine the temperature of X-ray bright points (XBPs). A sample of 14 XBPs and 2 background coronal regions have been identified and selected on both the images for detailed analysis. The temperature of XBPs is determined by filter ratio method. We find that the XBPs show temperature fluctuations and that the average temperature ranges from 1.1 MK to 3.4 MK which may correspond to different X-ray fluxes. These results suggest the existence of cooler and hotter XBPs and that the heating rate of XBPs is highly variable on short time scales.
Description:	Restricted Access
URI:	http://hdl.handle.net/2248/6175
ISBN:	978-1-58381-790-2
Appears in Collections:	IIAP Publications

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