Doppler Images and Chromospheric Variability of TWA 17

Details Doppler Images and Chromospheric Variability of TWA 17 Doppler Images and Chromospheric Variability of TWA 17

2009-07-16

arxiv.org/abs/0907.2777v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

11 pages, 15 figures, 2 tables. Accepted to MNRAS

Scientific paper

We present Doppler imaging and a Balmer line analysis of the weak-line T Tauri star TWA 17. Spectra were taken in 2006 with the UCL Echelle Spectrograph on the Anglo-Australian Telescope. Using least-squares deconvolution to improve the effective signal-to-noise ratio we produced a Doppler map of the surface spot distribution. This shows similar features to maps of other rapidly rotating T Tauri stars, i.e. a polar spot with more spots extending out of it down to the equator. In addition to the photospheric variability, the chromospheric variability was studied using the Balmer emission. The mean H-alpha profile has a narrow component consistent with rotational broadening and a broad component extending out to +/-220 km/s. The variability in H-alpha suggests that the chromosphere has at least one slingshot prominence 3 stellar radii above the surface.

Affiliated with

Also associated with

No associations

Rating

Doppler Images and Chromospheric Variability of TWA 17 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Doppler Images and Chromospheric Variability of TWA 17, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Doppler Images and Chromospheric Variability of TWA 17 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-621404