On the V-profile asymmetries in sunspots

Details On the V-profile asymmetries in sunspots On the V-profile asymmetries in sunspots

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.505..571s&link_type=abstract

In: SOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference and IAU Colloquium 188, 11 - 15 Jun

Computer Science

Asymmetry, Sunspot, Umbra, Penumbra, Light-Bridges, Velocity Gradients

Scientific paper

We studied the statistical properties of V-profile asymmetries in and around several sunspots situated at different position on the solar disk. The asymmetries formed at different regions of the sunspot (like the umbra, penumbra etc.) are clearly separated. Each of the sunspot showed similar relation between the area and amplitude asymmetries. A bi-modal distribution was seen in the plot between the area and amplitude asymmetries. The sunspot umbra showed very little area and amplitude asymmetries. The penumbral region showed larger area asymmetries compared to the amplitude asymmetries whereas the light-bridge and small-scale fields showed larger amplitude asymmetries compared to the area asymmetries. These asymmetries were compared with the velocity gradients and showed good correlation between the two, suggesting that the asymmetries were produced due to the gradients in the velocity. The results are compared with the results obtained with the SIR-inversion code and found good agreement.

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