Bibcode
DOI
Pietarila, A.; Socas-Navarro, H.; Bogdan, T.
Bibliographical reference
The Astrophysical Journal, Volume 670, Issue 1, pp. 885-902.
Advertised on:
11
2007
Journal
Citations
39
Refereed citations
29
Description
We study non-LTE inversions of the Ca II infrared triplet lines as a
tool for inferring physical properties of the quiet Sun. The inversion
code is successful in recovering the temperature, velocity, and
longitudinal magnetic flux density in the photosphere and chromosphere,
but the height range where the inversions are sensitive is limited,
especially in the chromosphere. We present results of inverting
spectropolarimetric observations of the lines in a quiet-Sun region. We
find three distinct ranges in chromospheric temperature: low
temperatures in the internetwork, high temperatures in the enhanced
magnetic network, and intermediate temperatures associated with low
magnetic flux regions in the network. The differences between these
regions become more pronounced with height as the plasma-β
decreases. These inversions support the picture of the chromosphere,
especially close to the magnetic network, being highly inhomogeneous in
both the vertical and horizontal directions.