A distinct magnetic property of the inner penumbral boundary. II. Formation of a penumbra at the expense of a pore
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DOI: 10.1051/0004-6361/201628547
Abstract: Context. We recently presented evidence that stable umbra-penumbra boundaries are characterised by a distinct canonical value of the vertical component of the magnetic field, B stable ver . In order to trigger the formation of… read more here.
Keywords: formation penumbra; stable ver; penumbra; magnetic field ... See more keywords