Observando la cromosfera solar en el infrarrojo

Abstract

The solar chromosphere has historically been studied from spectral lines in the visible and UV, notably Hα, Ca ii, Mg ii and Lyα. Observations at long UV wavelengths (304, 1600 and 1700 Å) from space have been recently added. However, the chromosphere can also be studied in the infrared (IR), both in the continuum as in the lines. Studies in this spectral band, which by definition extends from 1 μm to 1 mm, are scarce and recent, and its advantages having been little explored. In this work we present a review of what has been done and detail how much can be done with ground-based instruments. Argentina has a set of unique telescopes for the observation of the chromosphere, some with more than 20 years of operation and in process of renovation, others recently installed and still some in development. The panorama is very encouraging and allows to anticipate a strong international cooperation with other ground and space facilities.

Accepted in the Boletín de la Asociación Argentina de Astronomía, 2023. In Spanish. 7 pages, 8 figures