Quiet-Sun intensity contrasts in the near ultraviolet
Solar and Stellar Astrophysics
2010-09-07 v1
Abstract
We present high-resolution images of the Sun in the near ultraviolet spectral range between 214 nm and 397 nm as obtained from the first science flight of the 1-m Sunrise balloon-borne solar telescope. The quiet-Sun rms intensity contrasts found in this wavelength range are among the highest values ever obtained for quiet-Sun solar surface structures - up to 32.8% at a wavelength of 214 nm. We compare with theoretical intensity contrasts obtained from numerical magneto-hydrodynamic simulations. For 388 nm and 312 nm the observations agree well with the numerical simulations whereas at shorter wavelengths discrepancies between observed and simulated contrasts remain.
Keywords
Cite
@article{arxiv.1009.1050,
title = {Quiet-Sun intensity contrasts in the near ultraviolet},
author = {Johann Hirzberger and Alex Feller and Tino L. Riethmüller and Manfred Schüssler and Juan M. Borrero and Nadine Afram and Yvonne C. Unruh and Svetlana V. Berdyugina and Achim Gandorfer and Sami K. Solanki and Peter Barthol and Jose A. Bonet and Valentin Martínez Pillet and Thomas Berkefeld and Michael Knölker and Wolfgang Schmidt and Alan M. Title},
journal= {arXiv preprint arXiv:1009.1050},
year = {2010}
}
Comments
6 pages, 4 figures, accepted by ApJL