Results 11 to 20 of about 126,759 (296)
Contact tracing of binary stars: Pathways to stellar mergers [PDF]
Astronomy & Astrophysics, 2023 Stellar mergers are responsible for a wide variety of phenomena such as rejuvenated blue stragglers, highly magnetised stars, spectacular transients, iconic nebulae, and stars with peculiar surface chemical abundances and rotation rates.
Jan Henneco +2 more
semanticscholar +4 more sources
Mass-ratio distribution of contact binary stars [PDF]
Astronomy & Astrophysics, 2023 The mass ratio $q$ of a contact binary star evolves due to mass transfer, magnetic braking, and thermal relaxation oscillations to small values until it crosses a critical threshold $q_\text{min}$. When that happens, the binary undergoes the tidal Darwin
Milan Pešta, Ondřej Pejcha
semanticscholar +4 more sources
The Photometric Study of Six W UMa Systems and Investigation of the Mass–Radius Relations for Contact Binary Stars [PDF]
Publications of the Astronomical Society of the Pacific, 2022 We present the photometric analysis of six short-period systems (EI Oct, V336 TrA, NX Boo, V356 Boo, PS Boo, and V2282 Cyg). This is the first photometric analysis of these systems except for V336 TrA.
Atila Poro +15 more
semanticscholar +4 more sources
Chromospheric activity in bright contact binary stars [PDF]
Astronomy & Astrophysics, 2020 Context. Studying chromospheric activity of contact binaries is an effective way of revealing the magnetic activity processes of these systems. One efficient but somewhat neglected method for this purpose is to follow the changes of the Hα line profiles ...
T Mitnyan +19 more
semanticscholar +5 more sources
The light-curve intrinsic variability in 47 Kepler contact binary stars [PDF]
, 2022 This work studies the significance of the lightcurve intrinsic variability in the numerical modeling of contact binaries. Using synthetic light curves we are showing that the starspot-based intrinsic variability increases the apparent mass ratio by ...
B. Dȩbski
openalex +3 more sources
Detection of Contact Binary Candidates Observed By TESS Using the Autoencoder Neural Network [PDF]
The Astronomical JournalA contact binary may be the progenitor of a red nova that eventually produces a merger event and have a cut-off period of around 0.2 days. Therefore, a large number of contact binaries is needed to search for the progenitor of red novae and to study the ...
Xu Ding +3 more
doaj +2 more sources
The Astrophysical JournalWe present archival Hubble Space Telescope (HST) and JWST ultraviolet through near-infrared time series photometric observations of a massive minimal-contact binary candidate in the metal-poor galaxy Wolf–Lundmark–Melotte ( Z = 0.14 Z _⊙ ).
Maude Gull +17 more
doaj +2 more sources
The First Photometric Analysis of Two Low-mass-ratio Contact Binary Systems in TESS Survey [PDF]
The Astronomical JournalLow-mass-ratio ( q ) contact binary systems are progenitors of stellar mergers such as blue stragglers or fast-rotating FK Com stars. In this study, we present the first light curve analysis of two newly identified low mass-ratio contact binary systems ...
Qiyuan Cheng +10 more
doaj +2 more sources
Study on the physical parameters of 18 contact binary stars [PDF]
Monthly notices of the Royal Astronomical SocietyWe present the photometric light curve solutions of 18 W Ursae Majoris (W UMa)-type contact binary stars with orbital periods shorter than 0.5 days.
Atila Poro +6 more
openalex +2 more sources
A Cyclic Thermal Instability in Contact Binary Stars [PDF]
, 1976 Brian P. Flannery
semanticscholar +3 more sources