4 papers
The Double-lined Eclipsing Doradus System AX Draconis in a 0.568-day Orbit
Jae Woo Lee, Min-Ji Jeong, Kyeongsoo Hong +3
For the near-contact binary AX Dra, we present the first time-series spectroscopy collected with the echelle spectrograph BOES. From spectral analysis, we measured the projected ro…
The Pre-He White Dwarfs in Eclipsing Binaries. V. TIC 399725538
Jae Woo Lee, Kyeongsoo Hong, Min-Ji Jeong +2
We present echelle spectra of TIC 399725538 obtained in Korea and Thailand to investigate the physical properties and evolutionary scenarios of EL CVn-type binaries. The time-serie…
TIC 322208686: An Eclipsing System with Doradus Pulsations and a Third Component on a Wider Orbit
Jae Woo Lee, Kyeongsoo Hong, Min-Ji Jeong +3
TIC 322208686 is known to be a detached binary that exhibits two types of variability: pulsation and eclipse. We present the physical properties of the target star using the short-…
The Low Mass Ratio Overcontact Binary GV Leonis and Its Circumbinary Companion
Jae Woo Lee, Jang-Ho Park, Mi-Hwa Song +2
Photometric and spectroscopic observations of GV Leo were performed from 2017 to 2024. The light curves show a flat bottom at the primary eclipse and the conventional O'Connell eff…