What is the nature of the weak X-ray emission observed in the ..continuum. TTauri stars, low mass PMS stars with large mass accretion rates? Do they arisein a heavily absorbed but otherwise solar-like corona, in a thin dense plasmaarising from the accretion shock, or in discrete magnetospheric flaring? Thesethree emission mechanisms produce different spectral or temporal signatures,which can be distinguished using the EPIC imagers in concert with ground-basedphotometry. If due to accretion, we expect the X-ray flux to correlate with theinstantaneous mass accetion rate. We choose three targets that we have beenfollowing. The result of this program will be a better understanding of thecoronae and magnetic fields in the youngest low mass stars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-08-08T04:36:53Z/2005-09-07T02:14:49Z
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, Prof Frederick Walter, 2006, 'X-rays from the Most Active T Tauri Stars: Accretion Shocks or Magnetic HeatingquestionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-6ggrxjw
