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Chandra Reveals Variability and Sub-arcsecond Spatial Structure in the X-ray Emission from FU Orionisтезисы доклада
- Авторы: Skinner, Güdel S.L.;, Briggs M.;., Lamzin K.;., S A.
- Сборник: 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
- Серия: ASP Conference Series
- Том: 448
- Тезисы
- Год издания: 2011
- Место издания: Astronomical Society of the Pacific San Francisco, USA
- Первая страница: 1039
- Последняя страница: 1041
- Аннотация: We present results of a sensitive (99 ks) Chandra ACIS-S observation of the rapidly-accreting young star FU Ori. Chandra confirms the unusual two-component spectrum revealed previously by XMM-Newton. Chandra's higher angular resolution shows that the heavily-absorbed hot component is coincident with FU Ori and is variable. Such emission is a signature of a magnetically-active coronal source and supports the previous report of a magnetic field in FU Ori. In contrast, the soft lower absorption emission below 2 keV peaks 0.2 arcsec to the SE of FU Ori toward the faint near-IR companion FU Ori S. The companion lies 0.49 arcsec SE of FU Ori and is probably a young K-type star. The companion is likely an X-ray source and contributes significantly to the detected emission below 2 keV (and weakly above 2 keV). The presence of two closely-spaced sources explains the unusual two-component X-ray spectrum.
- Добавил в систему: Ламзин Сергей Анатольевич