|Title||LkCa 15: An Accreting T Tauri Star Orbited by a Young Planet|
|Author||Dr Stephen Skinner|
|Description||A protoplanet orbiting the T Tauri star LkCa 15 has recently been detected using a new IR masked aperture technique. It is so far unique, being the only known protoplanet around a young star (age 2 Myr). As such, the exoplanet and conditions in the transition disk will place tight constraints on planet formation models. We have detected bright X-ray emission from LkCa 15 in a short 9.8 ks Chandra exposure. We propose here a deeper follow-up observation with XMM EPIC that will reliably determine the X-ray absorption, plasma temperature distribution, and spectral hardness. These quantities are key inputs to disk-heating and planet formation models and when combined with existing optical-IR data will allow the gas-to-dust ratio in the disk to be determined.|
|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, 2015-03-10T23:00:00Z, 072234, 17.56_20190403_1200. https://doi.org/10.5270/esa-rxx1gxw|