Evidence for an Ionized Rotating Structure Around RW Aur |
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| Authors: | Ana I Gómez de Castro Eva Verdugo |
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| Institution: | 1. Instituto de Astronomía y Geodesia (CSIC-UCM), Facultad de Ciencias Matemáticas, Universidad Complutense de Madrid, Spain
2. ISO Data Center, VILSPA-ESA, P.O. Box 50727, Madrid, Spain
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| Abstract: | Profiles of the UV semiforbidden lines of C III and Si III of RW Aur have been obtained with the HST/STIS. The C III profile shows two high velocity components at v = ± 170 km s?1 and a central one. The Si III profile is very broad (FWHM = 293 km s?1) and the high velocity components are unresolved. It is shown that the high velocity components are most probably produced in a rotating belt alike the detected in other sources of bipolar outflows. A radius between 2.7 R * and the corotation radius (6.1 R *) is derived and a log T e (K) ?4.7 and log n e(cm ?3) = 11.6 are estimated. The belt is clumpy and the most likely source of heating is local X-rays radiation, probably associated with the release of magnetic energy. |
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