Flare and quiescent X-ray emission from Sigma Geminorum
| dc.creator | Nordon, R. | |
| dc.creator | Behar, E. | |
| dc.creator | Guedel, M. | |
| dc.date | 2004-09-20 | |
| dc.date.accessioned | 2026-07-07T02:14:40Z | |
| dc.date.available | 2026-07-07T02:14:40Z | |
| dc.description | The X-ray active RS CVn binary system Sigma Geminorum was observed during a long-duration flare with XMM-Newton. We compare line emission during the flare with line emission measured from a previous Chandra observation during quiescence, in a model independent way. We find that in addition to an overall 25% flux increase, which can be ascribed to variations in the system's quiescence activity over the 15 months that passed between the observations, there is a hot plasma component of kT_e > 1 keV that arises with the flare. The hot component is manifested primarily by high charge states of Fe and by a vast continuum, but with no temperature or abundance effect on the cooler plasma, except perhaps for Mg that is anomalously enhanced. | |
| dc.description | 4 pages, 5 figures. To appear in the proceedings of Cool Stars 13 conference | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0409472 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0409472 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/8208 | |
| dc.subject | Astrophysics | |
| dc.title | Flare and quiescent X-ray emission from Sigma Geminorum | |
| dc.type | text |