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…
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-…
KMTNet View of Blue Large-amplitude Pulsators Toward the Galactic Bulge: I. Discovery of Wide-orbit Companions in OGLE-BLAP-006
Seung-Lee Kim, Chung-Uk Lee, Kyeongsoo Hong +6
Blue large-amplitude pulsators (BLAPs), a recently classified type of variable stars, are evolved objects likely formed through interactions between stars in a binary system. Howev…
Pulsations and Pre-He White Dwarf in the Post-mass Transfer Eclipsing System WASP 1021-28
Jae Woo Lee, Min-Ji Jeong, Kyeongsoo Hong
We present results from VLT/UVES spectra and TESS photometric observations of the pulsating EL CVn binary WASP 1021-28, containing a He-core white dwarf precursor (pre-He WD). Doub…