Results 271 to 280 of about 52,158 (299)

RootHairFinder: An image processing method for quantifying cereal root growth and root hairs simultaneously in a flat rhizotron system

Themistokleous G, Binnie K, McKenzie BM, Mooney SJ, Valentine TA.   +4 more
europepmc   +1 more source

Close-in companions to contact binary stars

EAS Publications Series, 2013
W UMa-type contact binaries are composed of two late-type main-sequence stars, where both components are filling their critical Roche Lobes and sharing a common convective envelope. Their formation and evolution are unsolved problems in stellar astrophysics. This kind of binary systems have the lowest angular momentum and shortest orbital periods among
S.B. Qian, L.Y. Zhu, M. Zejda, Z. Mikulášek, J.J. Wang, N.P. Liu   +5 more
semanticscholar   +3 more sources

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Contact Tracing of Massive Binary Stars

Proceedings of the International Astronomical Union, 2022
AbstractStellar mergers produce more massive, rejuvenated (strongly magnetic) stars, with potentially peculiar properties, and can be detected as luminous red novae. Using a grid of detailed 1D binary evolution models, we aim to determine which binary systems are likely to merge and at what evolutionary stage.
Jan Henneco, Fabian R. N. Schneider, Saskia Hekker, Eva Laplace   +3 more
openaire   +2 more sources

Gas–Dynamical Features of the Envelopes of Contact Binary Stars

Astronomy Reports, 2017
The results of three-dimensional numerical simulations of the gaseous envelope of a contact binary star with parameters similar to those of SV Cen are presented. The outflow of matter from the vicinity of the Lagrange point L2 leads to the formation of a disk-like common envelope with a radius of order three times the component separation.
V. I. Shematovich, P. V. Kaigorodov, D. V. Bisikalo, A. M. Fateeva   +3 more
semanticscholar   +3 more sources

Near-Contact Binary Stars

1990
A group of close binary stars named near-contact binaries is defined. They are divided according to their physical characteristics into to two subclasses: V1010 Ophiuchi binaries and FO Virginis binaries. A list of members of the group, their current observational status, and their physical and evolutionary relationship to W Ursa-Majoris binaries is ...
J. S. Shaw
openaire   +2 more sources

Observational Evidence for the Evolution of Contact Binary Stars

1985
This paper reviews data relevant to the evolution of contact binary stars. Statistics, photometric surveys, period changes and the results of light curve fitting are reviewed. These data are then compared with evolutionary models.
S. Mochnacki
openaire   +2 more sources

Relative Luminosity and Surface Brightness of the Components of Contact Binary Stars

Publications of the Astronomical Society of the Pacific, 1972
It is shown that the model of zero-age main-sequence contact binary stars in which a common convective envelope surrounds both stars incorrectly predicts the observed ratios of luminosity and mean surface brightness of the two components of W Ursae Majoris stars.
exaly   +2 more sources

A Study of Ten Early-type Contact Binary Stars in the Small Magellanic Cloud

Publications of the Astronomical Society of the Pacific, 2023
To study early-type binary systems in different evolutionary stages or environments, the Small Magellanic Cloud (SMC) is an ideal laboratory due to its low metallicity compared to that of the Milky Way.
Chu-Qi Wu, Fuxing Li, Sheng-Bang Qian, Zhang Jia, N. Sarotsakulchai, A. Zubairi, Matekov Azizbek   +6 more
semanticscholar   +1 more source

BSN. II. The First Light Curve Study of Eight Total Eclipsing Contact Binary Stars with Shallow Fillout Factors

Astronomical Journal
This study provides the first comprehensive analysis of eight total-eclipse W Ursae Majoris-type contact binary systems. Ground-based photometric multiband observations were conducted at a Mexican observatory, and new times of minima were extracted.
A. Poro, Kai Li, R. Michel, Li-heng Wang, F. Aliçavuş, M. Nájera, P. Santillán-Ortega, F. J. Tamayo, Héctor Aceves   +8 more
semanticscholar   +1 more source

BSN. V. The First Detailed Light Curve Modeling of Eight Totally Eclipsing Contact Binary Stars Using Ground-based and TESS Observations

Publications of the Astronomical Society of the Pacific
This study broadens our comprehensive investigation of total-eclipse W Ursae Majoris-type contact binaries by analyzing eight additional systems, continuing our previous research.
A. Poro, R. Michel, Francisco Javier Tamayo, M. Hedayatjoo, Héctor Aceves, F. Aliçavuş   +5 more
semanticscholar   +1 more source