Using Chandra/LETG spectra to probe stellar coronae

Details Using Chandra/LETG spectra to probe stellar coronae Using Chandra/LETG spectra to probe stellar coronae

2004-03-09

arxiv.org/abs/astro-ph/0403215v1

Astronomy and Astrophysics

Astrophysics

6 pages, Conference proceedings: IAU Symposium 219. Stars as Suns: Activity, Evolution, Planets, eds. A.K. Dupree & A.O. Benz,

Scientific paper

We probe the relationship between surface magnetic fields and the X-ray emitting corona in the rapidly rotating star AB Dor. Circularly polarised spectra have been inverted to produce a surface (photospheric) magnetic field map. This surface map has been extrapolated to model AB Dor's coronal field topology and X-ray light curve. Chandra/LETG light curves of AB Dor from the same epoch show intrinsic variability at the 30% level. Period analysis indicates a fraction of this is due to rotational modulation. We measure velocity shifts in emission line centroids as a function of rotation period and find evidence of rotational modulation (max. vel. ~40+/- 13km/s). This modulation may indicate the presence of a localised X-ray emitting region at mid-to-high latitudes.

Affiliated with

Also associated with

No associations

Rating

Using Chandra/LETG spectra to probe stellar coronae 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 Using Chandra/LETG spectra to probe stellar coronae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Using Chandra/LETG spectra to probe stellar coronae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-180302