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Mass loss from binary stars approaching merger
Ondřej Pejcha
Some binary stars experience common envelope evolution, which is accompanied by drastic loss of angular momentum, mass, and orbital energy and which leaves behind close binaries of…
Mass-ratio distribution of contact binary stars
Milan Pešta, Ondřej Pejcha
The mass ratio of a contact binary star evolves due to mass transfer, magnetic braking, and thermal relaxation oscillations to small values until it crosses a critical threshol…
OGLE-BLG504.12.201843: A possible extreme dwarf nova
Camille Landri, Ondřej Pejcha, Michał Pawlak +5
We present the analysis of existing optical photometry and new optical spectroscopy of the candidate cataclysmic variable star OGLE-BLG504.12.201843. As was shown previously, this…
The complex dynamical past and future of double eclipsing binary CzeV343: misaligned orbits and period resonance
Ondřej Pejcha, Pavel Cagaš, Camille Landri +5
CzeV343 (=V849 Aur) was previously identified as a candidate double eclipsing binary (2+2 quadruple), where the orbital periods of the two eclipsing binaries ( day…