| Proposal ID | 040346 |
| Title | X-rays from the Most Active T Tauri Stars: Accretion Shocks or Magnetic Heating |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0403460201 |
| DOI | https://doi.org/10.5270/esa-mh43jmt |
| Principal Investigator, PI | Prof Frederick Walter |
| Abstract | What is the nature of the X-ray emission observed in the extreme T~Tauri stars?Does it arise in a heavily absorbed but otherwise solar-like corona, in a thindense plasma arising from the accretion shock, or in discrete magnetosphericflaring? These emission mechanisms produce different spectral or temporalsignatures, which can be distinguished using the EPIC imagers in concert withground-based photometry and spectroscopy. If due to accretion, we expect theX-ray flux to correlate with the instantaneous mass accretion rate. Our AO4observations of RU Lupi show a clear correlation between the optical and X-raybrightness, but the interpretation is not yet clear. The result of this programwill be a better understanding of the coronae of the youngest low mass stars. |
| Publications |
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| 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 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2008-04-13T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "EPIC", "xray brightness", "discrete magnetospheric flaring", "thin dense plasma", "magnetic heating", "heavily absorbed", "accretion shock", "epic imagers", "xray flux", "tauri stars", "otherwise solar", "xray emission", "temporal signatures", "ru lupi", "x rays", "low mass stars", "emission mechanisms", "accretion shoc" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Frederick Walter, 2008, 'X-rays from the Most Active T Tauri Stars: Accretion Shocks or Magnetic Heating', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-mh43jmt |