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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0108

Dynamics of bright points in polar and equatorial regions

plan term


@ @


 name : Kamio @  e-mail : kamio[at]linmpi.mpg.de

contact person in HINODE team

 name : Culhane @  e-mail : jlc[at]mssl.ucl.ac.uk

 abstract of observational proposal
X-ray bright points (XBPs) in the coronal hole are often accompanied by out flows, while those in quiet region are not. Such a difference is important for understanding acceleration and mass supply to the solar wind. The purpose of this study is to compare the dynamics of bright points inside and outside polar coronal hole by using the same observing program.

Previous Hinode observations indicate XBPs fluctuate rapidly, which might be triggered by the interaction of magnetic field in the photosphere. Temporal variation of XBPs may also give us insights into the important question, whether the magnetism in polar region is the same as that in equatorial region or not. Time cadence is crucial for investigating temporal fluctuation. By employing interleaved sparse rasters, effective cadence of 6 minute can be achieved by EIS without compromising its spatial coverage. Coordination between Hinode and SUMER will provide comprehensive dataset ranging from the photosphere to the corona.

 request to SOT
BFI Ca II H 111”x111”, 2x2 summing, 1 min cadence
NFI Na I shuttered IVDG 164”x164”, 2x2 summing, 5 min cadence
120Mbits / hour = 720 Mbits / 6 hours

 request to XRT
Al poly and Ti poly filters
384”x384”, 1 min cadence or faster
16 Mbits / hour = 96 Mbits / 6 hours

 request to EIS
Study: SK QS 50x320i (to be verified) 50”x300” interleaved scan
Aimed at coronal temperature lines
30 Mbits / hour = 180 Mbits / 6 hours

 other participating instruments

Pointings: This study is intended for Hinode/SUMER campaign scheduled in April 2009. Two pointings are requested, 6 hours in total. Southern polar coronal hole (3 hours) and Equatorial quiet region near West or East limb (3 hours)

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