| Name | 072234 |
| Title | LkCa 15: An Accreting T Tauri Star Orbited by a Young Planet |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0722340101 |
| DOI | https://doi.org/10.5270/esa-rxx1gxw |
| 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 |
| Temporal Coverage | 2014-02-20T19:12:34Z/2014-02-21T06:02:34Z |
| Version | 17.56_20190403_1200 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2015-03-10T23:00:00Z |
| 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 |