Infrared lines as probes of solar magnetic features. IV - Discovery of a siphon flow

Details Infrared lines as probes of solar magnetic features. IV - Discovery of a siphon flow Infrared lines as probes of solar magnetic features. IV - Discovery of a siphon flow

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261l..21r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 2, p. L21-L24.

Astronomy and Astrophysics

Astrophysics

26

Infrared Spectra, Solar Magnetic Field, Iron, Solar Spectra

Scientific paper

Spectra of two neighboring IR lines, Fe I 15648.5 A and Fe I 15652.9 A, are analyzed. The spectra were obtained with an IR array detector in active region plages with the entrance slit of the spectrograph placed across the polarity-inversion (neutral) line. Near the neutral line the positive polarity field is weaker (about 1200 G) and shows an upflow of up to 2 km/s, while the negative polarity field is stronger (about 1500 G) and exhibits a downflow of up to 1 km/s. This configuration corresponds to the expected signature of a siphon flow along a loop connecting flux tubes across the neutral line.

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