Magnetic Flux Emergence in a Coronal Hole

DOI: 
10.1007/s11207-020-01629-9
Publication date: 
01/05/2020
Main author: 
Palacios, Judith
IAA authors: 
Utz, Dominik
Authors: 
Palacios, Judith;Utz, Dominik;Hofmeister, Stefan;Krikova, Kilian;Gömöry, Peter;Kuckein, Christoph;Denker, Carsten;Verma, Meetu;González Manrique, Sergio Javier;Campos Rozo, Jose Iván;Koza, Július;Temmer, Manuela;Veronig, Astrid;Diercke, Andrea;Kontogiannis, Ioannis;Cid, Consuelo
Journal: 
Solar Physics
Refereed: 
Yes
Publication type: 
Article
Volume: 
295
Pages: 
64
Abstract: 
A joint campaign of various space-borne and ground-based observatories, comprising the Japanese Hinode mission (Hinode Observing Plan 338, 20 - 30 September 2017), the GREGOR solar telescope, and the Vacuum Tower Telescope (VTT), investigated numerous targets such as pores, sunspots, and coronal holes. In this study, we focus on the coronal hole region target. On 24 September 2017, a very extended non-polar coronal hole developed patches of flux emergence, which contributed to the decrease of the overall area of the coronal hole. These flux emergence patches erode the coronal hole and transform the area into a more quiet-Sun-like area, whereby bipolar magnetic structures play an important role. Conversely, flux cancellation leads to the reduction of opposite-polarity magnetic fields and to an increase in the area of the coronal hole.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2020SoPh..295...64P/abstract
ADS Bibcode: 
2020SoPh..295...64P
Keywords: 
Coronal holes;Magnetic fields;photosphere;Solar Wind;disturbances;Magnetosphere;geomagnetic disturbances