Results 1 to 10 of about 45,127 (299)

AGB stars in binaries and their progeny [PDF]

, 1998
It is currently admitted that an AGB star in a binary system is likely to pollute its companion with carbon- and s-process-rich matter. After the AGB star has faded into an unconspicuous white dwarf, the polluted companion enters the zoo of stars with ...
Jorissen, A.
core   +3 more sources

A Radial Velocity Survey of the Cygnus OB2 Association [PDF]

, 2006
We conducted a radial velocity survey of the Cygnus OB2 Association over a 6 year (1999 - 2005) time interval to search for massive close binaries. During this time we obtained 1139 spectra on 146 OB stars to measure mean systemic radial velocities and ...
Andy J. Monson, B. Uzpen, Blaauw A., Blaauw A., Christopher L. Fryer, Comeron F., Daniel C. Kiminki, Dequennoy A., Hall D. S., Henry A. Kobulnicky, Jennifer S. Irwin, K. Kinemuchi, Kazarovets E. V., Knodlseder J., Leitherer C., Lennon D. J., Maeder A., Michael J. Pierce, Nations H. L., R. C. Berrington, Rios L. Y., Romano G., S. E. Woosley, Torres-Dodgen A. V., van der Woerd H., Vanbeveren D., Vanbeveren D., Voelcker K., Wegner W.   +28 more
core   +3 more sources

The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems [PDF]

, 2016
This is the third installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R~2500 digital observations selected from the Galactic O-Star Catalog (GOSC).
Alfaro, E. J., Apellániz, J. Maíz, Arias, J. I., Barbá, R. H., Gamen, R. C., Herrero, A., Leão, J. R. S., Marco, A., Negueruela, I., Simón-Díaz, S., Sota, A., Walborn, N. R.   +11 more
core   +4 more sources

Spectroscopic binary frequency among CNO stars

The Astrophysical Journal Supplement Series, 1988
Les observations spectroscopiques de 35 etoiles de type OB ayant des anomalies de carbone, azote et oxygene sont presentees. Les vitesses radiales sont mesurees raie par raie pour chacune des etoiles. L'analyse statistique des resultats confirme que la frequence des binaires spectroscopiques de courte periode est plus grande chez les etoiles de type ...
Hugo Levato, Nidia Morrell, Beatriz Garcia, Stella Malaroda   +3 more
openaire   +1 more source

Spectroscopic Binaries Among λ Bootis-type Stars [PDF]

Proceedings of the International Astronomical Union, 2011
AbstractThe small group of λ Bootis stars comprises late B to early F-type stars, with moderate to extreme (up to a factor 100) surface under-abundances of most Fe-peak elements and solar abundances of lighter elements (C, N, O, and S). The main mechanisms responsible for this phenomenon are atmospheric diffusion, meridional mixing, and accretion of ...
Paunzen, Ernst, Fraga, Luciano, Heiter, Ulrike, Iliev, Ilian Kh., Kamp, Inga, Pintado, Olga   +5 more
openaire   +1 more source

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

Early-type stars in the young open cluster NGC 2244 and in the Mon OB2 association I. The multiplicity of O-type stars [PDF]

, 2009
Aims. We present the results obtained from a long-term spectroscopic campaign devoted to the multiplicity of O-type stars in the young open cluster NGC2244 and in the Mon OB2 association. Methods.
Bisiacchi, Chen, Conti, Conti, Conti, Conti, Conti, Cruz-González, De Becker, De Becker, de Wit, E. Gosset, Feldmeier, Frost, Fullerton, G. Rauw, García, Garmany, Gies, González, Gosset, H. Sana, Heck, Hensberge, Hiltner, Huang, Johnson, Kharchenko, L. Mahy, Li, Linder, Lindroos, Liu, M. De Becker, Martins, Martins, Mason, Mason, Massey, Mathys, Mathys, Maíz-Apellániz, Morgan, Morgan, Munari, Ogura, P. Eenens, Penny, Petrie, Plaskett, Pérez, Rauw, Sana, Sana, Sana, Sanford, Simón-Díaz, Stickland, Tadross, Turner, Turner, Underhill, Walborn, Walborn, Walborn, Wang, Y. Nazé, Zagury, Zinnecker   +68 more
core   +2 more sources

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

DOUBLE-LINED SPECTROSCOPIC BINARY STARS IN THE RAVE SURVEY [PDF]

The Astronomical Journal, 2010
We devise a new method for the detection of double-lined binary stars in a sample of the Radial Velocity Experiment (RAVE) survey spectra. The method is both tested against extensive simulations based on synthetic spectra and compared to direct visual inspection of all RAVE spectra.
Siebert, Arnaud, Matijevič, Gal, Zwitter, Tomaž, Munari, Ulisse, Bienaymé, Olivier, Binney, James J., Bland-Hawthorn, Joss Bland, Boeche, Corrado, Campbell, Randy D., Freeman, Kenneth C., Gibson, Brad K., Gilmore, Gerard F., Grebel, Eva K., Helmi, Amina, Navarro, Julio F., Parker, Quentin A., Seabroke, George M., Siviero, Alessandro, Steinmetz, Matthias, Watson, Fred G., Williams, Mary E K, Wyse, Rosemary F G   +21 more
openaire   +4 more sources

Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data

The Astrophysical Journal, 2023
We report the discovery of a candidate binary system consisting of a black hole (BH) and a red giant branch star in Gaia DR3. This binary system was discovered from 64,108 binary solutions for which both astrometric and spectroscopic data are available ...
Ataru Tanikawa, Kohei Hattori, Norita Kawanaka, Tomoya Kinugawa, Minori Shikauchi, Daichi Tsuna   +5 more
doaj   +1 more source