1 citations · 1 across the 4 of their papers we have counts for
4 papers
A cool R Coronae Borealis star Z UMi
Tonu Kipper, Valentina Klochkova
The high resolution spectra of a R CrB type star Z UMi are analysed. The atmospheric parameters of Z UMi are estimated: Teff=5250+/-250K and log g=0.5+/-0.3. This places Z UMi amon…
The optical spectrum of R Coronae Borealis close to 2003 decline
Tonu Kipper, Valentina Klochkova
Two sets of high-resolution spectra of R CrB obtained during the 2003 light decline are described. The first set was obtained on the descending branch of the light curve when V ~12…
Optical spectroscopy of RU Cam, a pulsating carbon star
Tonu Kipper, Valentina Klochkova
We analysed the high resolution spectra of a RU Cam, classified as W Vir type star. The atmospheric parameters of RU Cam were estimated Teff=5250K and log g=1.0. The hydrogen defic…
HP Lyr - possibly the hottest RV Tau type object
Dariusz Graczyk, Maciej Mikolajewski, Laurits Leedjarv +4
We report Johnson's UBVRI photometric and optical spectroscopic observations of a long period variable HP Lyr which up to now has been considered an eclipsing binary with a period…