Stellar activity: Doppler or spectral imaging

Details Stellar activity: Doppler or spectral imaging Stellar activity: Doppler or spectral imaging

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b..45r&link_type=abstract

In ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 45-51 (SEE N89-1

Astronomy and Astrophysics

Astronomy

2

Doppler Effect, Imaging Techniques, Iue, Spaceborne Astronomy, Stellar Activity, Ultraviolet Astronomy, Ultraviolet Spectra, Cool Stars, Stellar Atmospheres, Stellar Rotation

Scientific paper

High-dispersion IUE spectra were used to study the geometrical and physical characteristics of discrete structures in the outer atmospheres of rapidly-rotating active stars. As these stars rotate, such structures move across the stellar disk with a changing radial velocity producing narrow Doppler-shifted line components, which migrate across the rotationally broadened line profiles emitted by the immaculate star. By decomposing the observed emission line profiles into their individual components, it is possible to locate the discrete features on the stellar surface and to derive their physical characteristics. The spectral, or Doppler, imaging techniques are used to derive crude bi- or tridimensional images of stellar atmospheres and to study pure flare and plage emissions by spectral decomposition of high-resolution line profiles. Results are consistent with evidence collected at other wavelengths and using independent techniques. Therefore, it is promising to pursue this method, even though it requires data to be obtained over many time scales and over many orbits, in order to disentangle stable features from transient phenomena.

Affiliated with

Also associated with

No associations

Rating

Stellar activity: Doppler or spectral imaging 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 Stellar activity: Doppler or spectral imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stellar activity: Doppler or spectral imaging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1180823