|Title||Magnetically funneled accretion challenged by X-rays from T Tauri|
|Author||Dr Christian Schneider|
|Description||Young, forming stars accrete matter along magnetic field lines from the inner edge of the protoplanetary disk. The impact of this material on the stellar surface produces an X-ray emitting plasma of high density usually confirmed by X-ray observations. However, our target, the X-ray bright classical T Tauri star (CTTS) T Tau deviates strongly from this picture. In particular, the density of the cool plasma usually associated with the accretion process is too low to be compatible with the standard accretion scenario. We propose to obtain three 40 ks exposures to test whether this is due to a transient phenomenon or if T Tau permanently differs from established CTTS properties. In that case, a different accretion type and a different soft X-ray generating process must be present.|
|Publication||The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Multiepoch, multiwavelength study of accretion onto T Tauri. X-ray versus optical and UV accretion tracers . Schneider, P. C., Gunther, H. M., et all. . A&A . 618-55 . 2018 . 2018A&A...618A..55S ,
|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, 2015-09-29T22:00:00Z, 074450, 17.56_20190403_1200. https://doi.org/10.5270/esa-u05w38p|