Publication at Faculty of Mathematics and Physics |
2021
Abstract
Dwarf novae (DN) are binary star systems composed of a white dwarf accreting from a companion star. DN undergo periodic brightening caused by instabilities in the accretion disc.
I present new spectroscopic data and analysis of archival photometry for OGLE-BLG504.12.201843. This object displays periodic large outbursts that last for hundreds of days and short flares that appear during the quiescence state.
Together with spectroscopy, this evidence suggests that this object is a DN with extreme properties.