Results 11 to 20 of about 45,240 (301)

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

Towards an Accurate Determination of Parameters for Very Massive Stars: the Eclipsing Binary LMC-SC1-105 [PDF]

, 2008
This paper presents a photometric and spectroscopic study of the bright blue eclipsing binary LMC-SC1-105, selected from the OGLE catalog as a candidate host of very massive stars (>=30Mo).
Alceste Z. Bonanos, Andersen, Bagnuolo, Bally, Bonanos, Bonanos, Bonanos, Bouret, Bromm, Claret, Derekas, Elmegreen, Faccioli, Fitzpatrick, Gies, González, Hadrava, Herrero, Hilditch, Howarth, Kelson, Krumholz, Lanz, Massey, Massey, Massey, Mayer, Maíz Apellániz, Mochnacki, Nelson, O'Connell, Oey, Pinsonneault, Prša, Ribas, Santolaya-Rey, Schaerer, Schaller, Schwarzenberg-Czerny, Simon, Soszynski, Stickland, Walborn, Zebrun   +43 more
core   +1 more source

Transient jets in V617 Sagittarii [PDF]

, 2007
Some of the luminous Compact Binary Supersoft X-Ray sources (CBSS) have shown indications of jets, also called satellites due to their appearance in the spectra.
A. Damineli, A. S. Oliveira, Becker, C. A. O. Torres, Cieslinski, Cowley, Crampton, Deufel, Diaz, Greiner, Hamada, Herbig, Hutchings, J. E. Steiner, McGrath, Motch, Oliveira, Quaintrell, Schandl, Smak, Southwell, Steiner, Steiner, Steiner, Tomov, Trümper, van den Heuvel, van Teeseling, van Teeseling   +28 more
core   +1 more source

The VLT-FLAMES Tarantula Survey XXI. Stellar spin rates of O-type spectroscopic binaries [PDF]

, 2015
The initial distribution of spin rates of massive stars is a fingerprint of their elusive formation process. It also sets a key initial condition for stellar evolution and is thus an important ingredient in stellar population synthesis.
de Koter, A., de Mink, S. E., Dufton, P. L., Evans, C. J., Gräfener, G., Hénault-Brunet, V., Langer, N., Ramírez-Agudelo, O. H., Sana, H., Taylor, W. D., Tramper, F., Vink, J. S.   +11 more
core   +6 more sources

The Hot R Coronae Borealis Star DY Centauri is a Binary [PDF]

, 2012
The remarkable hot R Coronae Borealis (RCB) star DY Cen is revealed to be the first and only binary system to be found among the RCB stars and their likely relatives, including the extreme helium stars and the hydrogen-deficient carbon stars.
Garcia-Hernandez, D. A., Jeffery, C. Simon, Lambert, David L., McArthur, Barbara, Rao, N. Kameswara, Woolf, Vincent M.   +5 more
core   +2 more sources

The Orbital and Physical Properties of Five Southern Be+sdO Binary Systems

The Astronomical Journal, 2023
Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope ...
Luqian Wang, Douglas R. Gies, Geraldine J. Peters, Zhanwen Han   +3 more
doaj   +1 more source

A Spectroscopic Study of Field and Runaway OB Stars

, 2006
Identifying binaries among runaway O- and B-type stars offers valuable insight into the evolution of open clusters and close binary stars. Here we present a spectroscopic investigation of 12 known or suspected binaries among field and runaway OB stars ...
Allen C., Aslanov A. A., Aslanov A. A., Beardsley W. R., Blaauw A., Douglas R. Gies, Erika D. Grundstrom, Keenan F. P., M. Virginia McSwain, Mayer P., Moffat A. F. J., Plaskett J. S., Poveda A., Schaller G., Stickland D. J., Tabetha S. Boyajian, Voges W., Wesselius P. R., Zejnalov S. K.   +18 more
core   +1 more source

FM stars: A Fourier view of pulsating binary stars, a new technique for measuring radial velocities photometrically [PDF]

, 2012
Some pulsating stars are good clocks. When they are found in binary stars, the frequencies of their luminosity variations are modulated by the Doppler effect caused by orbital motion.
Kurtz, Donald W., Shibahashi, Hiromoto
core   +2 more sources

The New Version of the Binary Star Database (BDB)

Open Astronomy, 2012
The Binary star database contains data on about 100 000 stellar systems of multiplicity 2 to 22, taken from a large variety of published catalogues for all types of binary stars: visual, orbital, astrometric, interferometric, spectroscopic, photometric ...
Kaygorodov P., Debray B., Kolesnikov N., Kovaleva D., Malkov O.   +4 more
doaj   +1 more source

Gamma Cas Stars as Be+White Dwarf Binary Systems

The Astrophysical Journal Letters, 2022
The origin of the bright and hard X-ray emission flux among the γ Cas subgroup of B-emission line (Be) stars may be caused by gas accretion onto an orbiting white dwarf (WD) companion.
Douglas R. Gies, Luqian Wang, Robert Klement   +2 more
doaj   +1 more source