Results 11 to 20 of about 45,248 (299)
Hot Stars With Cool Companions [PDF]
, 2014 Young intermediate-mass stars have become high-priority targets for direct-imaging planet searches following the recent discoveries of planets orbiting e.g. HR 8799 and Beta Pictoris.
Dodson-Robinson, Sarah +2 more
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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 +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 +5 more
openaire +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 +21 more
openaire +4 more sources
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 +4 more
doaj +1 more source
The VLT-FLAMES Tarantula Survey XXII. Multiplicity properties of the B-type stars [PDF]
, 2015 We investigate the multiplicity properties of 408 B-type stars observed in the 30 Doradus region of the Large Magellanic Cloud with multi-epoch spectroscopy from the VLT-FLAMES Tarantula Survey (VFTS).
Apellániz, J. Maíz +9 more
core +3 more sources
SPECTROSCOPIC METALLICITY DETERMINATIONS FOR W UMa-TYPE BINARY STARS [PDF]
The Astronomical Journal, 2013 This study is an attempt to determine the metallicities of WUMa-type binary stars using spectroscopy. ~4,500 spectra collected at the David Dunlap Observatory were subject to the same Broadening Function processing to determine the combined line strength in the spectral window centered on the MgI triplet (5080-5285A).
Rucinski, S M, Pribulla, T, Budaj, Jan
openaire +3 more sources
Line Broadening in Field Metal-poor Red Giant and Red Horizontal Branch Stars [PDF]
, 2007 We report 349 radial velocities for 45 metal-poor field red giant and red horizontal branch stars. We have have identified one new spectroscopic binary, HD 4306, and one possible such system, HD 184711.
Alonso A. +16 more
core +3 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 +5 more
doaj +1 more source
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 +28 more
core +3 more sources