CaII Κ Imaging to Understand UV Irradiance Variability

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3077

Title:	CaII Κ Imaging to Understand UV Irradiance Variability
Authors:	Kariyappa, R
Keywords:	Chromosphere: CaII Κ Emission UV Irradiance
Issue Date:	Dec-2000
Publisher:	Indian Academy of Sciences
Citation:	Journal of Astrophysics and Astronomy, Vol. 21, No. 3 – 4, pp. 293 - 297
Abstract:	To identify and understand the underlying physical mechanisms of total solar and UV irradiance variability and to estimate the contribution of various hromospheric features to UV irradiance, detailed analysis of spatially resolved data is required. The various chromospheric features have been segregated and different parameters have been derived from CaII Κ Spectroheliograms of NSO/Sac Peak and Kodaikanal Observatory and compared with UV irradiance flux measured in MgII h and k lines by NOAA 9 satellite. The important results of this detailed analysis of CaII Κ Images of 1992 together with UV irradiance data will be discussed in this paper. contribution of various chromospheric features to UV irradiance, detailed analysis of spatially resolved data is required. The various chromospheric features have been segregated and different parameters have been derived from CaII Κ Spectroheliograms of NSO/Sac Peak and Kodaikanal Obser vatory and compared with UV irradiance flux measured in MgII h and k lines by NOAA 9 satellite. The important results of this detailed analysis of CaII Κ Images of 1992 togeth
URI:	http://hdl.handle.net/2248/3077
ISSN:	0250-6335
Appears in Collections:	IIAP Publications

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