August 28, 2022 to September 1, 2022
Serbian Academy of Sciences and Arts – SASA
Europe/Belgrade timezone

Variability of massive stars in IC342 galaxy

S02-AA-105
Aug 30, 2022, 5:30 PM
15m
Hall 301F (MI SASA)

Hall 301F

MI SASA

Board: S02-AA-105
Oral presentation S02 Astronomy and Astrophysics S02 Astronomy and Astrophysics

Speaker

Dr Antoniya Valcheva (Department of Astronomy, Sofia University "St. Kliment Ohridski", Bulgaria)

Description

We report BR-bands monitoring of 6 massive star candidates selected in a 10x10 sq. arcmin field in north-east quarter of the IC342 galaxy on the base of our B+H$\alpha$ images obtained with the 2m RCC telescope at NAO Rozhen, Bulgaria. We analyzed 2.3 yr BR-light curves of the objects. The candidates demonstrate photometric variations smaller than 0.2 mag, and no overall brightness changes has been detected. We supplement our photometry with BV HST magnitudes, obtained by us using the DOLPHOT 2 package and gr magnitudes from the Pan-STARRS catalogue DR1 in order to expand the light curve coverage and to check for a blending effect of neighboring stars on our PSF ground-based photometry.

Acknowledgements: This work is a part of the two years bilateral project between Bulgarian and Russian astronomers granted in 2019 by the National Science Fund of Bulgaria, KP-06-Russia-9/2019.

Primary author

Dr Antoniya Valcheva (Department of Astronomy, Sofia University "St. Kliment Ohridski", Bulgaria)

Co-authors

Prof. Nikolay Tikhonov (Special Astrophysical Observatory, Nizhnij Arkhyz, Karachai-Cherkessian Republic, Russia) Dr Olga Galazutdinova (Special Astrophysical Observatory, Nizhnij Arkhyz, Karachai-Cherkessian Republic, Russia) Dr Olga Sholukhova (Special Astrophysical Observatory, Nizhnij Arkhyz, Karachai-Cherkessian Republic, Russia) Prof. Petko Nedialkov (Department of Astronomy, Sofia University "St. Kliment Ohridski", Bulgaria)

Presentation materials