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astro-ph2002
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…
astro-ph2002
Possible pulsations of the M giant in MWC560
Sylwia M. Frackowiak, Maciej Mikolajewski, Toma Tomov
MWC 560 and other peculiar symbiotic binary, CH Cyg, have been classified as the prototypes of the new subclass of symbiotic systems - propellers, with accretion onto a magnetic wh…