Results 71 to 80 of about 1,008,045 (157)

Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries

The Astrophysical Journal
According to the core fragmentation and dynamical capture theories of binary formation, binaries tend to form with nearly equal masses. The detection of intermediate-mass binaries with low mass ratios challenges these theories, as such binaries may form ...
Linfeng Chang, Shengbang Qian, Lei Zang, Fuxing Li   +3 more
doaj   +1 more source

Orbital Modulation Induced by a Third Component in the Overcontact Binary V0554 Dra

The Astrophysical Journal
We present the first comprehensive photometric and spectroscopic analysis of the overcontact eclipsing binary V0554 Dra. By simultaneously modeling multiband light curves and radial velocity data using the Wilson–Devinney code, we determine that the ...
Mu-Lan Deng, Jia-Xin Zhao, Jie Wei, Yi-Man Liu, Chao-Yue Li, Jie Zheng, Kai Huang, Lin Cao, Hai-yin Qing, Yu Zhang, Lin-Qiao Jiang   +10 more
doaj   +1 more source

Hypervelocity binary stars: Smoking gun of massive binary black holes

, 2007
The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole.
Lu, Youjun, Lin, D. N. C., Yu, Qingjuan
core   +1 more source

TYC 3340-2437-1: A Quadruple System with a Massive Star

The Astrophysical Journal
Hierarchical massive quadruple systems are ideal laboratories for examining the theories of star formation, dynamical evolution, and stellar evolution.
Jiao Li, Chao Liu, Changqing Luo, Bo Zhang, Jiang-Dan Li, Jia-Dong Li, Zhan-Wen Han, Xue-Fei Chen, Xiao-Bin Zhang, Lu-Qian Wang, Min Fang, Li-Feng Xing, Xi-Liang Zhang, Chichuan Jin   +13 more
doaj   +1 more source

The Properties of V1016 Orionis, the Eclipsing Binary in the Trapezium System θ1 Orionis A

The Astronomical Journal
We have obtained high-dispersion spectroscopy, Strömgren y photometry, and Bessel BV measurements of the eclipsing binary V1016 Ori, which is part of the triple system θ ^1  Ori A that is one of the four bright Trapezium stars.
James R. Sowell, Francis C. Fekel, Gregory W. Henry, Michael H. Williamson, James D. Armstrong, Ryan Aipa, Martino Stino   +6 more
doaj   +1 more source

The connection between Delta Scuti stars and close binary parameters

, 2011
With recent advances in CCD technology, it has become possible to detect low-amplitude variability in stars. Thus, the number of low-amplitude variables has increased at an exceptional rate over the past decade.
Turner, Garrison H.
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Observations of binary stars with the differential speckle survey instrument. V. Toward an empirical metal-poor mass-luminosity relation

, 2015
In an effort to better understand the details of the stellar structure and evolution of metal-poor stars, the Gemini North telescope was used on two occasions to take speckle imaging data of a sample of known spectroscopic binary stars and other nearby ...
Everett, Mark E., Ciardi, David R., Horch, Elliott P., Winters, Jennifer G., Van Altena, William F., Demarque, Pierre, Howell, Steve B., Teske, Johanna K., Henry, Todd J.   +8 more
core   +1 more source

Radial Velocity Orbital Solutions for Candidate Black Hole and Neutron Star Binary Systems in the Gaia Data Release 3 Catalog

The Astrophysical Journal
We present spectroscopic follow-up observations of binary systems from the Gaia Data Release 3 (DR3) binary catalog that were selected to have large enough mass functions for their companions to be black holes or neutron stars.
Joshua D. Simon, Casey Y. Lam, Kareem El-Badry, Henrique Reggiani, Sukanya Chakrabarti, Puragra Guhathakurta, Ian B. Thompson, Nidia Morrell, Daniel Huber, Benjamin J. Fulton, Lauren M. Weiss   +10 more
doaj   +1 more source

The Magnified Waltz: Simulating Light Curves of Binary Stars Passing Through Microcaustics in Strong Lensing Galaxy Clusters

The Astrophysical Journal
Individual stars located near the caustics of galaxy clusters can undergo extreme magnification when crossing microcaustics, rendering them observable even at cosmological distances. Though most massive stars are likely to reside in binary systems rather
Wenwen Zheng, Xiaoting Fu, Yang Chen, Xuefei Chen, Yanjun Guo, Xuechun Chen, Huanyuan Shan, Guoliang Li   +7 more
doaj   +1 more source

A search for TeV gamma ray emission from X-ray binary stars [PDF]

, 1993
This work is concerned with the detection of pulsed TeV gamma ray emission from a number of X-ray binary systems by the use of the atmospheric Cerenkov technique.
Bowden, Christopher Charles Geoffrey
core