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

Kariyappa, R; DeLuca, E. E; Saar, S. H; Golub, L; Dame, L; Varghese, B. A

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dc.contributor.author	Kariyappa, R
dc.contributor.author	DeLuca, E. E
dc.contributor.author	Saar, S. H
dc.contributor.author	Golub, L
dc.contributor.author	Dame, L
dc.contributor.author	Varghese, B. A
dc.date.accessioned	2013-07-04T10:08:01Z
dc.date.available	2013-07-04T10:08:01Z
dc.date.issued	2012-08
dc.identifier.citation	Astronomical Society of the Pacific Conference Series, Vol. 454, pp. 149-152	en
dc.identifier.isbn	978-1-58381-790-2
dc.identifier.uri	http://hdl.handle.net/2248/6175
dc.description	Restricted Access	en
dc.description.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.	en
dc.language.iso	en	en
dc.publisher	Astronomical Society of the Pacific	en
dc.relation.ispartofseries	Astronomical Society of the Pacific Conference Series, Vol. 454
dc.relation.uri	http://www.aspbooks.org/a/volumes/article_details/?paper_id=34261	en
dc.rights	© Astronomical Society of the Pacific	en
dc.title	Cooler and Hotter X-ray Bright Points from Hinode/XRT Observations	en
dc.type	Article	en