Simultaneous X-ray and optical observations of the active M dwarf CN Leo haveshown variability in its magnetic flux (as measured through magneticallysensitive lines in the molecular FeH band) on different timescales: within a fewdays, within one night, and possibly even related to a flare event. We proposeto extend these studies to a larger sample of stars and observe the two flarestars Proxima Cen and YZ CMi simultaneously with XMM-Newton and VLT/UVES inorder to characterize the amplitudes and time scales of variations in theirphotospheric magnetic fields together with the behavior of chromosphericemission lines and coronal X-ray emission. This will enable us to traceactivity-related changes in the stellar magnetic field through all layers of the stellar atmosphere.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2009-03-10T02:40:59Z/2009-03-14T10:40:06Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Ms Carolin Liefke, 2010, 'Stellar magnetic fields: From the photosphere into the corona', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1i3sofu
