Izlaganje sa skupa
Solar Ca II K plage regions as proxies for magnetic fields of solar like stars
S. Guttenbrunner
; IGAM/Institute of Physics, University of Graz, Graz, Austria
Arnold Hanslmeier
; IGAM/Institute of Physics, University of Graz, Graz, Austria
Dominik Utz
; IGAM/Institute of Physics, University of Graz, Graz, Austria
Birgit Lemmerer
; IGAM/Institute of Physics, University of Graz, Graz, Austria
Isabell Piantschitsch
; IGAM/Institute of Physics, University of Graz, Graz, Austria
S. Thonhofer
; IGAM/Institute of Physics, University of Graz, Graz, Austria
Sažetak
Solar plage regions can be observed directly, whereas plage regions as well as star-spots on solar like stars, can only be detected
via their contribution to spectral irradiances of these stars. Such a spectral irradiance can be modelled by fractions belonging to the
quiet star, the plage regions, and the star-spots. The idea is, to measure these fractions as well as the intensity enhancement due to
plage regions on our Sun and then use this information to be able to model solar like stars. We verify the close connection between the
size of the plage regions and the luminosity of the Sun, given by a correlation coefficient of 0.822. The size of the plage regions varies
from 0\%, when the Sun is very quiet, up to 2.7\% for a more active Sun (a complete solar cycle is not yet analysed and hence our study does not contain an activity maximum). The used data sets are full-disc images taken by the RISE/PSPT instrument during the period from 2005 to 2012, at the MLSO.
Ključne riječi
Ca II K plage region; chromosphere; RISE/PSPT; MLT
Hrčak ID:
143695
URI
Datum izdavanja:
20.11.2014.
Posjeta: 792 *