Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247..130s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 130-147. Research supported by NSERC and NSF.
Astronomy and Astrophysics
Astrophysics
72
Doppler Effect, Late Stars, Stellar Spectrophotometry, Cataclysmic Variables, Imaging Techniques, Stellar Rotation
Scientific paper
Three different versions of the Doppler-imaging technique are applied to the spotted RS CVn-type binary HD 26337 = Ei Eri. New high-resolution high-S/N spectroscopy was obtained along with simultaneous BV photometry during 1988. Images were generated independently by three separate groups using different versions of the Doppler-imaging technique but the same data. All maps from Ca I 6439 A showed a cool asymmetric spot at the pole or at high latitudes generally surrounding the rotation pole and also some smaller equatorial spots. The maps from Fe I exhibit detailed differences to the maps from Ca I. The equatorial features were found to change on short time-scales (weeks). It is inferred that the polar spot is short-lived (years) but changes its appearance on the same several-week time-scale. Simultaneous and contemporary broad-band photometry was found to be crucial as additional data in the mapping procedure and as a reliability test of the Doppler-imaging solution.
Hackman Thomas
Hatzes Artie P.
Piskunov Nikolai E.
Poutanen Markku
Rice John B.
No associations
LandOfFree
Doppler imaging of high-latitude SPOT activity on HD 26337 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 imaging of high-latitude SPOT activity on HD 26337, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Doppler imaging of high-latitude SPOT activity on HD 26337 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-859786