Masumi Shimojo and Saku Tsuneta 2009 ApJ 706 L145 doi:10.1088/0004-637X/706/1/L145
Masumi Shimojo1 and Saku Tsuneta2
Show affiliationsWe investigated the relation between polar magnetic fields and polar coronal activities based on Stokes maps of photospheric and chromospheric lines, simultaneous X-ray and EUV images. These images are taken with Hinode and Solar and Heliospheric Observatory. With careful co-alignment between these images, we found that the X-ray jets, the X-ray bright points, and the coronal loops in the polar coronal hole appear around the relatively large magnetic concentrations near the kG-patches with minority polarity. The magnetic concentrations have magnetic polarity opposite to that of kG-patches, and they are clearly identified in the Stokes-V maps of the Na I line. We also found that such minority magnetic concentrations emerge from below the photosphere in the polar region. Our results suggest that the coronal activities and structures in the polar coronal hole can be used as a tracer of the appearance of the minority polarities in the polar region.
96.60.Hv Electric and magnetic fields
96.60.Na Chromosphere and chromosphere–corona transition; spicules
96.60.Q- Solar activity (see also 92.70.Qr-in Global change)
Issue 1 (2009 November 20)
Received 2009 July 2, accepted for publication 2009 October 19
Published 2009 November 4
Masumi Shimojo and Saku Tsuneta 2009 ApJ 706 L145
O Herrwerth et al 2008 New J. Phys. 10 025007
Kanchan Saxena et al 2008 J. Phys. D: Appl. Phys. 41 015102
G Flucke et al 2008 JINST 3 P09002
M A Costolo et al 2008 Nanotechnology 19 035707
Sajal Biring et al 2008 Nanotechnology 19 015304
Caylin Mendelowitz et al. 2004 ApJ 601 1120
W J Duncan et al 2010 J. Phys.: Condens. Matter 22 052201
Kourosh Nozari and Behnaz Fazlpour JCAP11(2007)006
Geoffrey Compère et al JHEP12(2009)047