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

Visa fullständig post



Permalänk

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

Titel: The impact of coronal hole characteristics and solar cycle activity in reconstructing coronal holes with EUHFORIA
Författare: Asvestari, E.; Heinemann, S. G.; Temmer, M.; Pomoell, J.; Kilpua, E.; Magdalenic, J.; Poedts, S.
Upphovmannens organisation: Space Physics Research Group
Particle Physics and Astrophysics
Department of Physics
Utgivare: IOP Publishing
Datum: 2020
Språk: eng
Sidantal: 6
Tillhör serie: 10TH YOUNG RESEARCHER MEETING
Tillhör serie: Journal of Physics Conference Series
ISSN: 1742-6588
DOI: https://doi.org/10.1088/1742-6596/1548/1/012004
Permanenta länken (URI): http://hdl.handle.net/10138/319445
Abstrakt: 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
Referentgranskad: Ja
Licens: cc_by
Användningsbegränsning: openAccess
Parallelpublicerad version: publishedVersion


Filer under denna titel

Totalt antal nerladdningar: Laddar...

Filer Storlek Format Granska
Asvestari_2020_J._Phys._Conf._Ser._1548_012004.pdf 3.392Mb PDF Granska/Öppna

Detta dokument registreras i samling:

Visa fullständig post