| Proposal ID | 030027 |
| Title | Accretion Funnels in Classical T Tauri Stars: Xx Chamaeleontis |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0300270201 |
| DOI | https://doi.org/10.5270/esa-dd1cnxn |
| Principal Investigator, PI | Prof J rgen Schmitt |
| Abstract | We propose to perform a 130 ksec pointing on the classical T Tauri star XX Chawith XMM-Newton to obtain a high-resolution RGS spectrum. XX Cha would be thethird cTTS observed with high spectral resolution, and - just as in TW Hya andBP Tau - we expect to find very high densities (log n_e < 13 ), and a depletionof grain forming metals. With these data we want to show that the X-ray emissionfrom cTTS arises - predominantly - from an accretion funnel shock and not fromsolar-like magnetic activity. If so, cTTS would be the big brothers to magneticneutron stars. Further we want to study if the depletion of grain forming metalsis a common feature in these accretion flows that can be ascribed presumably tothe formation of planetesimals in the accretion disks around cTTS. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2005-09-02T03:10:52Z/2005-09-03T15:00:00Z |
| 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 | 2006-11-11T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "grain forming metals", "magnetic neutron stars", "xmm newton", "tauri stars", "accretion flows", "accretion funnel shock", "resolution rgs spectrum", "spectral resolution", "tw hya", "accretion funnels", "xx cha", "xray emission", "XMM-Newton", "bp tau", "densities log n_e", "xx chamaeleontis", "XMM", "accretion dis", "magnetic activity" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof J rgen Schmitt, 2006, 'Accretion Funnels in Classical T Tauri Stars: Xx Chamaeleontis', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dd1cnxn |