| Name: | Krishna Prasad Sayamanthula |
| Affiliation: | Aryabhatta Research Institute of Observational Sciences (ARIES) |
| Conference ID : | ASI2024_1021 |
| Title : | Coronal signatures of transition region downflows within a sunspot |
| Authors : | S. Krishna Prasad1, C. J. Nelson2, M. Mathioudakis3, D. B. Jess3, and T. Van Doorsselaere4 |
| Authors Affiliation: | 1 Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital - 263001, India
2 European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands
3 Astrophysics Research Centre, Queen’s University Belfast, BT7 1NN, UK
4 Center for mathematical Plasma Astrophysics, KU Leuven, 3001 Leuven, Belgium |
| Mode of Presentation: | Oral |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Recent observations have revealed that intermittent plasma downflows are commonly observed in sunspots. These flows can be observed either in the umbra or penumbra of a sunspot. The flow speeds are often supersonic, with the corresponding spectra displaying a steady redshifted component that appears as a separate new line. For this reason, these flows are often referred to as "dual flows". High-resolution observations suggest that these flows are colocated with the foot point of coronal loops. Although their origin is still unclear, they are usually explained either in terms of siphon flows or coronal rain. In this study, we analyse the spectroscopic data of a sunspot from IRIS along with the corresponding imaging data from SDO/AIA to study the observational characteristics of these downflows. |
