High energy (X-ray+UV) radiation from young stars profoundly influences physicaland chemical processes in their circumstellar environment.Gas and dust inprotoplanetary systems are excited by these photons, which are the dominantionization source for hundreds AU around the star. X-rays penetrate deep intodisks and power complex chemistry on grain surfaces. We propose RGS+EPICobservations of 4 weak-lined T Tauri stars that anchor the non-accreting end ofour 111 orbit HST Large Project to observe the UV spectra of a carefully chosensample of 32 young stars with COS and STIS. Modeling the effects of high energyradiation requires BOTH UV and X-ray spectra. Without RGS observations ouranalysis of the HST spectra for these four more-evolved (5-9 Myr old) stars will be severely hindered.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2011-01-03T15:15:11Z/2011-02-28T10:07:12Z
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 ALEXANDER BROWN, 2012, 'SYSTEMATIC STUDY OF EFFECTS OF HIGH-ENERGY RADIATION ON PROTOPLANETARY SYSTEMS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-wvpitdl
