A dataset provided by the European Space Agency

Name 040346
Title X-rays from the Most Active T Tauri Stars: Accretion Shocks or Magnetic Heating


DOI https://doi.org/10.5270/esa-mh43jmt
Author Prof Frederick Walter
Description What is the nature of the X-ray emission observed in the extreme TvirgulTauri stars? Does it arise in a heavily absorbed but otherwise solar-like corona, in a thin dense plasma arising from the accretion shock, or in discrete magnetospheric flaring? These emission mechanisms produce different spectral or temporal signatures, which can be distinguished using the EPIC imagers in concert with ground-based photometry and spectroscopy. If due to accretion, we expect the X-ray flux to correlate with the instantaneous mass accretion rate. Our AO4 observations of RU Lupi show a clear correlation between the optical and X-ray brightness, but the interpretation is not yet clear. The result of this program will be a better understanding of the coronae of the youngest low mass stars.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2007-03-21T06:48:46Z/2007-03-21T11:27:19Z
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 2008-04-13T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2008-04-13T00:00:00Z, 040346, 17.56_20190403_1200. https://doi.org/10.5270/esa-mh43jmt