Scientific article
English

X-ray Emission from the Pre-Main Sequence Systems FU Orionis and T Tauri

Published inAstrophysics and space science, vol. 304, no. 1-4, p. 165-167
Publication date2006-09-15
First online date2006-09-15
Abstract

We present new results from recent X-ray observa- tions of the accreting pre-main sequence stars FU Orionis and T Tauri. XMM-Newton observations of the close binary sys- tem FU Ori reveal an unusual X-ray spectrum consisting of a cool moderately-absorbed component and a hot component viewed through much higher absorption. The two compo- nents thus originate in physically distinct regions. The double absorption spectrum is qualitatively different than observed in typical coronal sources and may signal either non-coronal emission or separate unresolved X-ray contributions from more than one star in the system. High-resolution Chandra imaging of the T Tau triple system shows that its X-ray emis- sion is dominated by the optically-revealed northern compo- nent T Tau N. X-ray spectra of T Tau obtained with XMM can be acceptably fitted with a moderately absorbed two- temperature thermal plasma model. Its spectral properties are similar to those seen in coronal X-ray source.

Keywords
  • Binaries:close
  • Stars:pre-main sequence
  • Stars:X-rays
Affiliation entities Not a UNIGE publication
Citation (ISO format)
SKINNER, Stephen et al. X-ray Emission from the Pre-Main Sequence Systems FU Orionis and T Tauri. In: Astrophysics and space science, 2006, vol. 304, n° 1-4, p. 165–167. doi: 10.1007/s10509-006-9100-5
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Additional URL for this publicationhttp://link.springer.com/10.1007/s10509-006-9100-5
Journal ISSN0004-640X
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