000007106 001__ 7106
000007106 005__ 20241016143741.0
000007106 037__ $$aPOSTER-2024-0093
000007106 100__ $$aVanden Broeck, Grégory
000007106 245__ $$aEffect of the inclination angle of the solar rotation axis on disk-resolved indices from full-disk solar images in the Ca II K line
000007106 260__ $$c2024
000007106 269__ $$c2024-08-13
000007106 520__ $$aThe chromospheric emission in the Ca II K line is a primary tracer of the magnetic activity of the Sun and other Sun-like stars. The Sun is observed from Earth from its Equator's point of view, whereas other stars are observed at all possible viewing angles. The chromospheric plages, main contributors to the Ca II K emission, are distributed between mid-latitude and the Equator. Therefore, we suspect that the inclination angle of the solar rotation axis has an impact on disk-resolved indices such as the plage area and intensity. These indices are strongly correlated to the S-index, a well-known index to study the magnetic activity of stars, and could help to better understand the magnetic activity of Sun-like stars. We have studied the effect of the inclination rotation axis on disk-resolved indices using the archives of synoptic full-disk images taken on site at the Royal Observatory of Belgium with the Uccle Solar Equatorial Table (USET) since 2012.
000007106 594__ $$aNO
000007106 6531_ $$aSun: activity
000007106 6531_ $$aSun: chromosphere
000007106 6531_ $$aSun: faculae, plages
000007106 6531_ $$astars: activity
000007106 6531_ $$astars: solar-type
000007106 700__ $$aBechet, Sabrina
000007106 700__ $$aRauw, Grégor
000007106 773__ $$tInternational Astronomical Union General Assembly 2024 - Cape Town, South Africa
000007106 8560_ $$fgregory.vandenbroeck@ksb-orb.be
000007106 85642 $$ahttps://ui.adsabs.harvard.edu/abs/2024IAUGA..32P.927V/abstract
000007106 8564_ $$s1401743$$uhttp://publi2-as.oma.be/record/7106/files/VandenBroeckG_Poster_IAU2024.pdf
000007106 8564_ $$s16082$$uhttp://publi2-as.oma.be/record/7106/files/VandenBroeckG_Poster_IAU2024.jpg?subformat=icon-180$$xicon-180
000007106 8564_ $$s18583$$uhttp://publi2-as.oma.be/record/7106/files/VandenBroeckG_Poster_IAU2024.gif?subformat=icon$$xicon
000007106 980__ $$aCPOSTER