Detection of opposite polarities in a sunspot light bridge: evidence of low-altitude magnetic reconnection

Simple item page
dc.creatorBharti, Lokesh
dc.creatorRimmele, Thomas
dc.creatorJain, Rajmal
dc.creatorSmartt, R. N.
dc.date2007-01-24
dc.date.accessioned2026-07-07T10:21:36Z
dc.date.available2026-07-07T10:21:36Z
dc.descriptionA multi-wavelength photometric analysis was performed in order to study the sub-structure of a sunspot light bridge in the photosphere and the chromosphere. Active region NOAA 8350 was observed on 1998 October 8. The data consist of a 100 min time series of 2D spectral scans of the lines FeI 5576, H-alpha 6563, FeI 6302.5, and continuum images at 5571. We recorded line-of-sight magnetograms in 6302.5. The observations were taken at the Dunn Solar Telescope at U. S. National Solar Observatory, Sacramento Peak. We find evidence for plasma ejection from a light bridge followed by Ellerman bombs. Magnetograms of the same region reveal opposite polarity in light-bridge with respect to the umbra. These facts support the notion that low altitude magnetic reconnection can result in the magnetic cancellation as observed in the photosphere.
dc.description8 pages, 3 figures. Accepted for publication in MNRAS
dc.identifierhttps://arxiv.org/abs/astro-ph/0701674
dc.identifierhttp://arxiv.org/abs/astro-ph/0701674
dc.identifierMon.Not.Roy.Astron.Soc.376:1291-1295,2007
dc.identifierdoi:10.1111/j.1365-2966.2007.11525.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175227
dc.subjectAstrophysics
dc.titleDetection of opposite polarities in a sunspot light bridge: evidence of low-altitude magnetic reconnection
dc.typetext

Files

Collections

arXiv