Response of Granulation to Small Scale Bright Features in the Quiet Sun

Details Response of Granulation to Small Scale Bright Features in the Quiet Sun Response of Granulation to Small Scale Bright Features in the Quiet Sun

2011-02-16

arxiv.org/abs/1102.3404v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

18 pages 8 figures. The version here has slightly different position and size of figures than the original article accepted in

Scientific paper

We detected 2.8 bright points (BPs) per Mm$^2$ in the Quiet Sun (QS) with the New Solar Telescope (NST) at Big Bear Solar Observatory; using the TiO 705.68 nm spectral line, at an angular resolution ~ 0.1'' to obtain 30 min data sequence. Some BPs formed knots that were stable in time and influenced the properties of the granulation pattern around them. The observed granulation pattern within ~ 3'' of knots presents smaller granules than those observed in a normal granulation pattern; i.e., around the knots a suppressed convection is detected. Observed BPs covered ~ 5% of the solar surface and were not homogeneously distributed. BPs had an average size of 0.22'', they were detectable for 4.28 min in average, and had an averaged contrast of 0.1% in the deep red TiO spectral line.

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