The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA

Show full item record



Permalink

http://hdl.handle.net/10138/319445

Citation

Asvestari , E , Heinemann , S G , Temmer , M , Pomoell , J , Kilpua , E , Magdalenic , J & Poedts , S 2020 , The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA . in 10TH YOUNG RESEARCHER MEETING . Journal of Physics Conference Series , no. 1 , vol. 1548 , IOP Publishing , 10th Young Researcher Meeting , Rome , Italy , 18/06/2019 . https://doi.org/10.1088/1742-6596/1548/1/012004

Title: The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA
Author: Asvestari, E.; Heinemann, S. G.; Temmer, M.; Pomoell, J.; Kilpua, E.; Magdalenic, J.; Poedts, S.
Contributor: University of Helsinki, Space Physics Research Group
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Publisher: IOP Publishing
Date: 2020
Language: eng
Number of pages: 6
Belongs to series: 10TH YOUNG RESEARCHER MEETING
Belongs to series: Journal of Physics Conference Series
URI: http://hdl.handle.net/10138/319445
Abstract: Modelling with high accuracy the open magnetic field and the fast solar wind in the heliosphere is essential for space weather forecasting purposes. Primary sources of open magnetic field flux are Coronal Holes (CH), uni-polar regions that appear as dark patches in the solar corona when observed in X-ray and extreme-ultraviolet (EUV) images due to having significantly lower density and temperature to their surroundings. Therefore, when assessing how well the open magnetic field and the fast solar wind are modelled one can look at how well the model performs on one of its fundamental functions, that of reconstructing coronal hole areas. In this study we investigate how the CH morphology (i.e. latitudinal position of the centre of mass, area, intensity, elongation) and the solar variability, from high to low activity periods, can affect the results. We also investigated the possibility that the model is reconstructing CHs that are systematically shifted with respect to their observed position. The study is applied on 15 CHs exhibiting different latitudinal position and geometry. We compare the modelled CH areas with boundaries obtained by remote sensing EUV observations using the CATCH tool (Collection of Analysis Tools for Coronal Holes). We found no apparent effect of the CH characteristics on the modelling capabilities. In addition, solar cycle activity seems not to have any effect either. However, we emphasize that our sample is small and this outcome highlights the need for an extended research.
Subject: TIME
115 Astronomy, Space science
114 Physical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Asvestari_2020_J._Phys._Conf._Ser._1548_012004.pdf 3.392Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record