The First Light Curve Modeling and Orbital Period Change Investigation of Nine Contact Binaries around the Short-period Cutoff [PDF]
Astronomical Journal, 2020 In this paper, we present the first light curve synthesis and orbital period change analysis of nine contact binaries around the short-period limit. It is found that all these systems are W-subtype contact binaries. One of them is a medium contact system
K. Li +7 more
semanticscholar +1 more source
A 1201 s Orbital Period Detached Binary: The First Double Helium Core White Dwarf LISA Verification Binary [PDF]
Astrophysical Journal, 2020 We report the discovery of a 1201 s orbital period binary, the third shortest-period detached binary known. Sloan Digital Sky Survey J232230.20 + 050942.06 contains two He-core white dwarfs orbiting with a 27° inclination.
Warren R. Brown +6 more
semanticscholar +1 more source
Orbital Decay of Short-period Exoplanets via Tidal Resonance Locking [PDF]
Astrophysical Journal, 2021 A large fraction of known exoplanets have short orbital periods where tidal excitation of gravity waves within the host star causes the planets’ orbits to decay.
Linhao Ma, J. Fuller
semanticscholar +1 more source
Orbital Period Changes of Selected Two Semi-Deteached Binaries
Journal of Advanced Research in Natural and Applied Sciences, 2022 Since the data obtained from satellite data are very sensitive, the minima times of the target systems have obtained from Kepler (K2) and TESS observations.
Muhammed Faruk Yıldırım
doaj +1 more source
General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system [PDF]
Nature, 2019 General relativity1 predicts that short-orbital-period binaries emit considerable amounts of gravitational radiation. The upcoming Laser Interferometer Space Antenna2 (LISA) is expected to detect tens of thousands of such systems3 but few have been ...
K. Burdge +25 more
semanticscholar +1 more source
Modeling and Orbital Parameters of Kepler Heartbeat Stars
The Astrophysical Journal Supplement Series, 2023 Heartbeat stars (HBSs) are astrophysical laboratories for studying binaries with eccentric orbits. A catalog of 173 Kepler HBSs was reported by Kirk et al., and we have modeled 153 of them by using a corrected version of Kumar et al.'s model based on the
Min-Yu Li +6 more
doaj +1 more source
Orbital Decay in a 20 Minute Orbital Period Detached Binary with a Hydrogen-poor Low-mass White Dwarf [PDF]
Astrophysical Journal, 2019 We report the discovery of a detached double white dwarf binary with an orbital period of ≈20.6 minutes, PTF J053332.05+020911.6. The visible object in this binary, PTF J0533+0209B, is a ≈0.17 M⊙ mass white dwarf with a helium-dominated atmosphere ...
K. Burdge +16 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 The 4U 1820-30 is an ultra-compact low-mass X-ray binary (LMXB) near the center of the globular cluster NGC 6624. Its negative orbital period derivative, observed from the phase evolution of its sinusoidal-like orbital variation, contradicts the positive
Yi Chou, Yao-Wun Jhang
doaj +1 more source
The Superoutburst Duration versus Orbital Period Relation for AM CVn Stars [PDF]
Astronomical Journal, 2019 We examine the relationship between superoutburst duration tdur and orbital period Porb in AM CVn ultra-compact binary systems. We show that the previously determined steep relation derived by Levitan et al.
J. Cannizzo, G. Ramsay
semanticscholar +1 more source
Precise measures of orbital period, before and after nova eruption for QZ Aurigae [PDF]
Monthly notices of the Royal Astronomical Society, 2019 For the ordinary classical nova QZ Aurigae (which erupted in 1964), we report 1317 magnitudes from 1912--2016, including four eclipses detected on archival photographic plates from long before the eruption.
B. Schaefer +9 more
semanticscholar +1 more source