Evidence for an Ionized Rotating Structure Around RW Aur

Details Evidence for an Ionized Rotating Structure Around RW Aur Evidence for an Ionized Rotating Structure Around RW Aur

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.292..691g&link_type=abstract

Astrophysics and Space Science, v. 292, Issue 1, p. 691-696 (2004).

Astronomy and Astrophysics

Astrophysics

1

Stars: Pre-Main-Sequence, Stars: T Tauri, Stars: Individual: Rw Aur

Scientific paper

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 Te (K) ~=4.7 and log ne(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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