Comparisons of X-ray emission from accreting and non-accreting T Tauri stars(TTSs) demonstrate that accretion affects the properties of the hot gas, but theorigin of X-ray emission from accreting TTSs remains uncertain. The few existinghigh-resolution X-ray spectra of classical TTSs (CTTSs) have been particularlyintriguing, revealing low forbidden-to-intercombination ( f/i ) line ratiosindicative of either a high electron density or intense FUV radiation field,both hard and soft X-ray emission, and often a high Ne abundance relative to O.We propose to obtain RGS spectra of the CTTSs EX Lupi and FK Ser, which whencombined with previous high-resolution X-ray spectra will allow us to correlatethe f/i ratio with other stellar properties, including the mass accretion rate.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-09-18T01:06:35Z/2006-09-18T22:33:24Z
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, Dr Gregory Herczeg, 2008, 'A high-resolution X-ray spectra of a classical T Tauri star', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-iyxdubp
