Speaker
Dr
Eugene Semenko
(Special Astrophysical Observatory, Nizhnii Arkhyz, Russia)
Description
This talk reviews the results of a spectroscopic study of two pulsating A-stars. HD 118660 was known as a photometric variable star whose physical properties had been studied with the use of spectroscopy from the Russian 6-m Большой Телескоп Альт-азимутальный (BTA). Here, we present the direct spectroscopic confirmation of the pulsational nature of the star and outline the requirements for the further study. HD 73045 is a spectroscopic binary SB1-type star with a pulsating component. This star had been extensively observed with the Main Stellar Spectrograph of the BTA in March 2015. That monitoring revealed the changes of radial velocity with a period close to four hours. In this study we have re-analysed the data from the Special Astrophysical Observatory (SAO) and compare them with the results of spectroscopic monitoring carried out with the HERMES spectrograph from the Roque de los Muchachos Observatory (RMO) in La Palma, Spain.
Primary author
Dr
Eugene Semenko
(Special Astrophysical Observatory, Nizhnii Arkhyz, Russia)
Co-authors
Dr
Ilya Yakunin
(Special Astrophysical Observatory)
Dr
Santosh Joshi
(ARIES, Nainital)
