Observations of solar magnetic elements with 0.1" resolution

Details Observations of solar magnetic elements with 0.1" resolution Observations of solar magnetic elements with 0.1" resolution

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.2005b&link_type=abstract

American Astronomical Society Meeting 204, #20.05; Bulletin of the American Astronomical Society, Vol. 36, p.686

Astronomy and Astrophysics

Astronomy

Scientific paper

New observations of solar magnetic elements in a remnant active region plage near disk center are presented. The observations were taken with the Swedish 1-meter Solar Telescope on La Palma. We examine a single 430.5 nm G-band filtergram that resolves ˜70 km (0.''1) structures and find new forms of magnetic structures in this particular region. A simultaneous Ca II H-line image is used to examine the low-chromosphere of network elements. A simultaneous Fe I 630.25 nm magnetogram that resolves structures as small as 120 km (0.''18) FWHM with a flux sensitivity of approximately 130 Mx cm-2 quantifies the magnetic structure of the region. A Ni I 676.8 nm Dopplergram establishes relative velocity patterns associated with the network features with an accuracy of about 300 m s-1. Magnetic flux in this region as seen in both the magnetogram and the G-band image is typically structured into larger, amorphous, ``ribbons'' with a wide range of flux density values, rather than isolated kilogauss flux tubes. We also present filtergrams and magnetograms of magnetic elements at the solar limb showing that solar faculae are resolved into bright granular walls that appear to project 350 to 500 km above the photosphere.

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