Microflaring of a solar Bright point

Details Microflaring of a solar Bright point Microflaring of a solar Bright point

2002-07-12

arxiv.org/abs/astro-ph/0207274v1

Astron.Astrophys. 395 (2002) 977-982

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures, in press Astronomy and Astrophysics; for Fig.3 it is recommended to download separately the colour version

Scientific paper

10.1051/0004-6361:20021024

A solar X-ray Bright point (BP) was observed with the SUMER-spectrograph of the SOHO-observatory. The data consist of four far-UV spectral lines formed between 2 10^4 - 6 10^5 K, with 2 arcsec spatial, 2.8 min temporal and 4 km/s spectral resolution. A striking feature is the strong microflaring and appearance of several short lived transients. Using simultaneous magnetic field measurements the region observed seemed to lie above a cancelling flux region. With respect to the filling factor and emission measure this particular BP was similar to the average surface of a moderately active solar type star.

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