Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...345..221p&link_type=abstract
Astronomy and Astrophysics, v.345, p.221-232 (1999)
Astronomy and Astrophysics
Astrophysics
59
Techniques: Interferometric, Stars: Fundamental Parameters, Stars: Individual: R Leo, Stars: Agb And Post-Agb, Infrared: Stars
Scientific paper
The Mira-type star R Leonis was observed at two different epochs in the K band with the FLUOR beam combiner on the IOTA interferometer. A variation of diameter is clearly detected for the very first time at this wavelength revealing an apparent pulsation of atmospheric layers very close to the stellar photosphere. We discuss the excess of visibility measured at high spatial frequencies and show that they very likely reveal smaller diameters of the photosphere (22-24 mas) than those deduced on the basis of shorter frequency components. This smaller diameter makes R Leonis a fundamental pulsator. Mira models are compared to our data and a disagreement with spatial intensity distribution and dynamical behaviour is found. based on observations collected at the IOTA interferometer, Whipple Observatory, Mount Hopkins, Arizona.
Coudé du Foresto Vincent
Lacasse Marc G.
Mariotti Jean-Marie
Mennesson Bertrand
Perrin Guy
No associations
LandOfFree
Interferometric observations of R Leonis in the K band. First direct detection of the photospheric pulsation and study of the atmospheric intensity distribution 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 Interferometric observations of R Leonis in the K band. First direct detection of the photospheric pulsation and study of the atmospheric intensity distribution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interferometric observations of R Leonis in the K band. First direct detection of the photospheric pulsation and study of the atmospheric intensity distribution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1119200