|Title||A Snapshot Survey of the Hyades: Testing Models for Magnetic Saturation|
|Author||Prof Marcel Agueros|
|Description||Investigations of the relationship between stellar magnetic activity and rotation reveal the presence of a saturation threshold where, for unknown reasons, activity no longer varies with rotation period (Prot). However, these studies have focused on stars in young open clusters (<500 Myr) and field stars (2-10 Gyr). Measuring Prot and proxies for magnetic activity in older open clusters is essential to understand the evolution of the activity-rotation relation from the ZAMS to the age of field stars. We propose a snapshot X-ray survey of K and M dwarfs with measured Prot in the 650-Myr-old Hyades. By matching the resulting X-ray catalog to our catalog of 134 Hyades Prot, we will analyze the behavior of coronal activity as a function of Rossby number Ro at 650 Myr.|
|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, 2018-03-29T22:00:00Z, 078511, 17.56_20190403_1200. https://doi.org/10.5270/esa-hazk0nt|