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Table 2

Summary of averaged properties of the Ca ii H BPs.

Parameter Mean valuea No. of BPs

Intensity 1.48 ± 0.3    ⟨ ICa ⟩  107
Horizontal velocity 2.2 ± 1.8 km s-1 107
Diameter 0.2 ± 0.02 arcsec 107
Lifetime 673 ± 526 s 47
CP b 0.32 ± 0.21% 53
|Bcos(γ)|b 142 ± 87 G 53

Notes.  CP: Circular polarisation degree, described as in Sect. 2.2; |Bcos(γ)|: unsigned longitudinal component of magnetic field.


The uncertainty estimates were calculated from the standard deviations of the parameters’ distributions. For formal errors see main text.


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