𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Supergranular line profile variation of Mgiλ2852

✍ Scribed by Marc S. Allen


Publisher
Springer
Year
1978
Tongue
English
Weight
126 KB
Volume
60
Category
Article
ISSN
0038-0938

No coin nor oath required. For personal study only.

✦ Synopsis


The chromospheric network is barely visible in the Mg I A 2852 line. Unlike in plages, where it shows well-defined self-reversed emission structure in the core, the line is an unreversed absorption feature in the network boundaries, exhibiting only a small blue asymmetry. In the network cell interiors, the line is unreversed and symmetrical.


📜 SIMILAR VOLUMES


Variations of the asymmetry of disk-inte
✍ David H. Bruning; Barry LaBonte 📂 Article 📅 1985 🏛 Springer 🌐 English ⚖ 335 KB

Mean line bisector positions were found for the neutral iron line at 25250.2 using disk-integrated sunlight. After correction for the apparent time variation of the instrumental profile, it was found that the mean bisector position was constant during the period from May 1982 to February 1983. The c

Space and time variations of KI 7699 sol
✍ T. Roca-Cortes; H. Wöhl; M. Vazquez 📂 Article 📅 1983 🏛 Springer 🌐 English ⚖ 391 KB

The temporal and spatial behaviour of the K 17699 line profile is investigated. In particular we have measured the asymmetries of the line profile at several residual intensities using the bisector method. We find, in the bisector of the mean line profile, similar shapes as those obtained before for

The importance of temperature variations
✍ H. Nussbaumer 📂 Article 📅 1968 🏛 Springer 🌐 English ⚖ 90 KB

Line profiles, especially of chromospheric and coronal lines, might be influenced appreciably by the joint effects of a temperature gradient and a radial expansion. Temperatures deduced from such profiles could lead to erroneous conclusions concerning the ion-temperature of the line-forming matter.