Short paper: Invisible sunspots and 'orphan' prominences: an observational study

Details Short paper: Invisible sunspots and 'orphan' prominences: an observational study Short paper: Invisible sunspots and 'orphan' prominences: an observational study

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jbaa..120..365n&link_type=abstract

Journal of the British Astronomical Association, vol.120, no.6, p.365-367

Astronomy and Astrophysics

Astronomy

Scientific paper

The distribution of bright prominences between the east and west limbs of the Sun was studied during a period of solar minimum. An E-W asymmetry was detected, involving prominences not associated with visible sunspot regions. The anomaly may be explained by the presence of four clusters of 'orphan' prominences, three on the west limb and one on the east. At the time of observation these orphan prominences could not be linked to the limb transits of any recognised groups of sunspots. Data presented support the hypothesis that all four prominence clusters were associated with the limb transits of invisible active sunspot regions.

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