Results 11 to 20 of about 84,288 (244)

Small Mass Ratio Contact Binary GR Vir and HV Aqr [PDF]

Journal of Astronomy and Space Sciences, 2004
The absolute dimensions of low mass contact binary, GR Vir and HV Aqr were obtained using WD program from the published spectroscopic and photometric observational data.
Kyu-Dong Oh, Chun-Hwey Kim, Young Woon Kang, Ho-il Kim, Woo-Baik Lee   +4 more
doaj   +1 more source

Detection and Seismic Study of Gravity and Rossby Mode Pulsations in Four Contact Binaries

The Astrophysical Journal, 2023
We report the detection of gravity ( g ) and Rossby ( r ) mode pulsations of four short-period eclipsing binaries, KIC 5439790, KIC 7501230, KIC 9350889, and KIC 9453192 based on the 4 yr Kepler high-precision photometry.
X. B. Zhang, Xinghao Chen, Jianning Fu, Yan Li   +3 more
doaj   +1 more source

Low Mass Ratio Contact Binary V410 Aur and V776 Cas - II [PDF]

Journal of Astronomy and Space Sciences, 2005
New BVR CCD light curves of the low mass ratio contact binaries, V410 Aur and V776 Cas, were observed with the 61 cm reflector and a 2K CCD camera at the Sobaeksan Astronomical Observatory.
Kyu-Dong Oh, Chun-Hwey Kim, Ho-iL Kim
doaj   +1 more source

From a Dinuclear System to Close Binary Cosmic Objects

Astronomy, 2023
Applying the ideas from microscopic objects to macroscopic stellar and galactic systems, the evolution of compact di-stars and di-galaxies is studied in the mass asymmetry coordinate. The formation of stable binary systems is analyzed.
G. G. Adamian, N. V. Antonenko, H. Lenske, V. V. Sargsyan   +3 more
doaj   +1 more source

Fractal Measures and Nonlinear Dynamics of Overcontact Binaries [PDF]

, 2019
Overcontact binary stars are systems of two stars where the component stars are in contact with each other. This implies that they share a common envelope of gas.
Ambika, G., George, Sandip V., Misra, R.
core   +2 more sources

CCD Photometry of Faint Variable Stars in the Globular Cluster NGC 6752 [PDF]

, 1999
We present the results of a photometric survey for variable stars in the field of the nearby globular cluster NGC 6752. The cluster was monitored in 1996 and 1997 for a total of 54 hours with 3 different CCD cameras mounted on the 1.0-m Swope telescope ...
Alcaino G., Buonanno R., Cannon R. D., Heber U., Ian B. Thompson, Janusz Kaluzny, Kaluny J., Kaluny J., Moehler S., Schwarzenberg-Czerny A., Schwarzenberg-Czerny A., Wojtek Krzeminski, Wojtek Pych   +12 more
core   +3 more sources

Mass Ratio Estimates for Overcontact Binaries Using the Derivatives of Light Curves

The Astrophysical Journal, 2023
The photometric mass ratios of eclipsing binaries are usually estimated by light-curve modeling with an iterative method. We propose a new method for estimating the photometric mass ratio of an overcontact binary using the derivatives of a light curve ...
Shinjirou Kouzuma
doaj   +1 more source

General Relativistic Models of Binary Neutron Stars in Quasiequilibrium [PDF]

, 1997
We perform fully relativistic calculations of binary neutron stars in corotating, circular orbit. While Newtonian gravity allows for a strict equilibrium, a relativistic binary system emits gravitational radiation, causing the system to lose energy and ...
A. D. Wiseman, A. P. Lightman, C. S. Kochanek, D. Lai, D. Lai, D. Lai, F. A. Rasio, F. A. Rasio, F. A. Rasio, G. B. Cook, G. B. Cook, G. B. Cook, G. B. Cook, H. Komatsu, I. Hachisu, I. Hachisu, I. Hachisu, J. B. Hartle, J. C. Lombardi, J. H. Taylor, J. L. Friedman, J. M. Bardeen, J. M. Bowen, J. M. Bowen, J. R. Wilson, J. R. Wilson, J. R. Wilson, J. W. York, Jr., K. Taniguchi, L. Bildsten, L. Blanchet, L. E. Kidder, M. A. Scheel, M. Ruffert, M. Shibata, M. Shibata, M. Shibata, M. Shibata, Niall Ó Murchadha, P. R. Brady, R. Arnowitt, S. A. Teukolsky, S. Chandrasekhar, S. E. Thorsett, S. L. Shapiro, S. L. Shapiro, T. W. Baumgarte, T. W. Baumgarte, T. W. Baumgarte, W. H. Press, X. Zhuge, X. Zhuge   +51 more
core   +2 more sources

Dynamical evolution of active detached binaries on log Jo - log M diagram and contact binary formation [PDF]

, 2006
Orbital angular momentum (Jo), systemic mass (M) and orbital period (P) distributions of chromospherically active binaries (CAB) and W Ursae Majoris (W UMa) systems were investigated.
Awadalla, Bilir, Binnendijk, Claret, Demircan, Demircan, Eggen, Eggen, Eggen, Eggen, Eggleton, Gazeas, Ghez, Guinan, Huang, Karataş, Kiseleva, Kraft, Maceroni, Maceroni, Mestel, Mestel, Mochnacki, Montes, Montes, O. Demircan, Okamoto, Paczynski, Pooley, Pribulla, Pringle, Qian, Rasio, Rucinski, Rucinski, Rucinski, S. Bilir, Schatzman, Stepien, Van't Veer, Vilhu, Wilson, Y. Karataş, Yakut, Z. Eker   +44 more
core   +5 more sources

Search for Variable Stars in the Globular Cluster M3 [PDF]

, 1997
We describe here results of a photometric time-sequence survey of the globular cluster M3 (NGC 5272), in a search for contact and detached eclipsing binary stars.
Clement, C., Hilditch, R. W., Kaluzny, J., Rucinski, S. M.   +3 more
core   +2 more sources