|Title||The X-Ray View of Stellar Cycles|
|Author||Dr Bradford Wargelin|
|Description||With the advent of large-scale optical monitoring and exoplanet search programs, the number of stars with known stellar cycles is growing rapidly. In parallel, advances in theoretical modeling are revolutionizing our understanding of magnetic field generation in late-type stars. Many questions remain, however, and new puzzles have arisen, such as the discovery of cycles in fully convective stars. X-ray emission is a powerful diagnostic of stellar magnetic activity, with cycle amplitudes that are much larger and often more regular than in other wavebands. Of the hundreds of stars with confirmed cycles, however, only 8 have been monitored in X rays. We request XMM observations of two stars that will significantly broaden the X-ray perspective on stellar cycles.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2022-12-01T00:00:00Z, 088216, 19.16_20210326_1200. https://doi.org/esa-[xxxxxxx]|