H-alpha features with hot onsets III. Fibrils in Lyman-alpha and with ALMA

Autor:	Rutten, Robert J.
Rok vydání:	2016
Předmět:	Astrophysics - Solar and Stellar Astrophysics
Zdroj:	A&A 598, A89 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1051/0004-6361/201629238
Popis:	In H-alpha most of the solar surface is covered by dense canopies of long opaque fibrils, but predictions for quiet-Sun observations with ALMA have ignored this fact. Comparison with Ly-alpha suggests that the large opacity of H-alpha fibrils is caused by hot precursor events. Application of a recipe that assumes momentary Saha-Boltzmann extinction during their hot onset to millimeter wavelengths suggests that ALMA will observe H-alpha-like fibril canopies, not acoustic shocks underneath, and will yield data more interesting than if these canopies were transparent. Comment: Accepted for Astronomy & Astrophysics; Figure 1 corrected
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1609.01122 Zobrazit plný text záznamu View this record from Arxiv