Dynamic fibrils in H-alpha and C IV
| dc.creator | de Wijn, A. G. | |
| dc.creator | De Pontieu, B. | |
| dc.date | 2007-06-13 | |
| dc.date.accessioned | 2026-07-07T10:56:13Z | |
| dc.date.available | 2026-07-07T10:56:13Z | |
| dc.description | Aim: To study the interaction of the solar chromosphere with the transition region, in particular active-region jets in the transition region and their relation to chromospheric fibrils. Methods: We carefully align image sequences taken simultaneously in C IV with the Transition Region and Coronal Explorer and in H-alpha with the Swedish 1-m Solar Telescope. We examine the temporal evolution of "dynamic fibrils", i.e., individual short-lived active-region chromospheric jet-like features in H-alpha. Results: All dynamic fibrils appear as absorption features in H-alpha that progress from the blue to the red wing through the line, and often show recurrent behavior. Some of them, but not all, appear also as bright features in C IV which develop at or just beyond the apex of the H-alpha darkening. They tend to best resemble the H-alpha fibril at +700 mA half a minute earlier. Conclusions: Dynamic chromospheric fibrils observed in H-alpha regularly correspond to transition-region jets observed in the ultraviolet. This correspondence suggests that some plasma associated with dynamic fibrils is heated to transition-region temperatures. | |
| dc.description | 8 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/0706.2011 | |
| dc.identifier | http://arxiv.org/abs/0706.2011 | |
| dc.identifier | Astron.Astrophys.460:309-316,2006 | |
| dc.identifier | doi:10.1051/0004-6361:20065864 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/186337 | |
| dc.subject | Astrophysics | |
| dc.title | Dynamic fibrils in H-alpha and C IV | |
| dc.type | text |