Results 11 to 20 of about 563,075 (357)
Quantitative spectroscopy of close binary stars [PDF]
Proceedings of the International Astronomical Union, 2011 The method of spectral disentangling has now created the opportunity for studying the chemical composition in previously inaccessible components of binary and multiple stars.
Brogaard +35 more
core +6 more sources
Binary Central Stars of Planetary Nebulae Discovered Through Photometric Variability III: The Central Star of Abell 65 [PDF]
, 2015 A growing number of close binary stars are being discovered among central stars of planetary nebulae. Recent and ongoing surveys are finding new systems and contributing to our knowledge of the evolution of close binary systems. The push to find more systems was largely based on early discoveries which suggested that 10 to 15% of all central stars are ...
Frew, David J +4 more
arxiv +11 more sources
From Dinuclear Systems to Close Binary Stars: Application to Source of Energy in the Universe [PDF]
International Journal of Modern Physics E, Vol. 27, No. 11 (2018)
1850093, 2018 The evolution of close binary stars in mass asymmetry (transfer) coordinate is considered. The conditions for the formation of stable symmetric binary stars are analyzed. The role of symmetrization of asymmetric binary star in the transformation of potential energy into internal energy of star and the release of a large amount of energy is revealed.
V. Sargsyan +3 more
arxiv +3 more sources
Ultraviolet Observations of Close Binary Stars [PDF]
Symposium - International Astronomical Union, 1980 In this paper, we present far ultraviolet observations of three interacting binary stars (HR 2142, HR 7084, and λ Tauri). All stars exhibit evidence of a gas stream and extensive mass outflow from the system. Physical parameters are derived for the gas stream in HR 2142.
R. S. Polidan, Geraldine J. Peters
openalex +3 more sources
The Close Binary Frequency of Wolf-Rayet Stars as a Function of Metallicity in M31 and M33 [PDF]
Proceedings of the International Astronomical Union, 2014 Massive star evolutionary models generally predict the correct ratio of WC-type and WN-type Wolf-Rayet stars at low metallicities, but underestimate the ratio at higher (solar and above) metallicities. One possible explanation for this failure is perhaps single-star models are not sufficient and Roche-lobe overflow in close binaries is necessary to ...
K. Neugent, P. Massey
arxiv +3 more sources
Fast rotating stars resulting from binary evolution will often appear to be single [PDF]
, 2010 Rapidly rotating stars are readily produced in binary systems. An accreting star in a binary system can be spun up by mass accretion and quickly approach the break-up limit. Mergers between two stars in a binary are expected to result in massive, fast rotating stars.
C Carathtodory +7 more
arxiv +6 more sources
Massive close binaries II [PDF]
, 2003 In the present review we summarize direct and indirect evidence that the massive close binary frequency is very large. We then discuss the binary evolutionary processes and we present a general massive close binary evolutionary scheme. Finally, we highlight the importance of massive close binaries for population number synthesis and the chemical ...
Vanbeveren, Dany
arxiv +4 more sources
Terrestrial Planet Formation Surrounding Close Binary Stars [PDF]
, 2006 Disk material has been observed around both components of some young close binary star systems. It has been shown that if planets form at the right places within such disks, they can remain dynamically stable for very long times.
Lissauer, Jack J., Quintana, Elisa V.
core +5 more sources
Probing the models: Abundances for high-mass stars in binaries [PDF]
, 2013 The complexity of composite spectra of close binary star system makes study of the spectra of their component stars extremely difficult. For this reason there exists very little information on the photospheric chemical composition of stars in close binaries, despite its importance for informing our understanding of the evolutionary processes of stars ...
Pavlovski, K., Southworth, J.
arxiv +4 more sources
Radial Velocity Studies of Close Binary Stars. XV [PDF]
The Astronomical Journal, 2008 Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for the last eight close binary systems analyzed the same way as in the previous papers of this series: QX And, DY Cet, MR Del, HI Dra, DD Mon, V868 ...
Abhyankar +60 more
core +9 more sources