Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1707d&link_type=abstract
American Astronomical Society, HEAD meeting #11, #17.07; Bulletin of the American Astronomical Society, Vol. 41, p.683
Astronomy and Astrophysics
Astronomy
Scientific paper
High resolution optical spectra of the nearby T Tauri star TW Hya were obtained with MIKE on Magellan/Clay to be simultaneous with a long CHANDRA observation. The optical spectra can be used to evaluate the veiling which is thought to arise from accretion. There is a correlation between the amount of veiling and the coronal X-ray emission. The variation in the coronal emission follows variation of the optical continuum veiling with a significant time delay (about 2.4 hours). This suggests that accretion processes can feed the stellar corona, and corroborates the HETG spectrum reported by Brickhouse et al (2009). In addition, measurements of the veiling continuum produced by the hotspot in the photosphere of TW Hya, indicate temperatures ranging from 8500 K - 12000 K with small covering fractions.
Brickhouse Nancy S.
Cranmer Steven
Dupree Andrea K.
Schneider Edward
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