Results 91 to 100 of about 1,046,866 (182)

Toward 3D orbits of wide sdO/B binaries

Astronomy & Astrophysics
Hot subdwarf stars (sdO/Bs) are widely considered to be products of binary evolution. A significant fraction of them is found in long-period or wide binaries (P > 500 d) with main-sequence (MS) companions, likely resulting from a stable mass-transfer ...
Deshmukh K., Geier S., Sana H., Dawson H., Dorsch M., Frost A. J., Heber U., Kupfer T., Picco A., Vučković M.   +9 more
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ANAorb: A robust framework for the optimal modelling of binaries

Astronomy & Astrophysics
Context. Reliable orbital solutions for binary stars are essential for deriving accurate stellar parameters and for testing stellar-evolution models. However, current fitting approaches often struggle with local minima, strong parameter correlations, and
Andrade Manuel
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Observations of binary stars with the differential speckle survey instrument. IV. Observations of Kepler, CoRoT, and Hipparcos stars from the Gemini North Telescope

, 2012
We present the results of 71 speckle observations of binary and unresolved stars, most of which were observed with the DSSI speckle camera at the Gemini North Telescope in 2012 July. The main purpose of the run was to obtain diffraction-limited images of
Everett, Mark E., Ciardi, David R., Horch, Elliott P., Howell, Steve B.   +3 more
core   +1 more source

δ Circini: A massive hierarchical triple system with an eclipsing binary

Astronomy & Astrophysics
δ Circini is known to be a massive multiple system containing a 3.9 d inner eclipsing binary in a slightly elliptical orbit exhibiting slow apsidal motion and a distant tertiary with a probable period of 1644 d.
Švrčková J., Harmanec P., Klement R., Rivinius Th., Barlow B. N., Juryšek J., Mašek M., Hoňková K., Oplištilová A.   +8 more
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Time-lapse Very Long Baseline Interferometry Imaging of the Close Active Binary HR 1099

The Astrophysical Journal
We report multiepoch astrometric very long baseline interferometry observations of the chromospherically active binary HR 1099 (V711 Tau, HD 22468) at six epochs over 63 days using the Very Long Baseline Array at 22.2 GHz.
Walter W. Golay, Robert L. Mutel, Evan E. Abbuhl   +2 more
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Imaging binary stars by the cross-correlation technique?

, 1997
. We present in this paper a technique for imag-ing binary stars from speckle data. This technique is based upon the computation of the cross-correlation between the speckle frames and their square.
M. Carbillet, J. -f. Lyon, Aimé, C., E. Aristidi, Aristidi, E., C. Aime, Carbillet, M., J.-F. Lyon, Lyon, J.-F.   +8 more
core   +1 more source

Southern Massive Stars at High Angular Resolution (SMaSH+): Properties of hierarchical massive triples★

Astronomy & Astrophysics
Context. While massive stars are frequently found in triple architectures, the lack of observed parameter distributions has long remained a bottleneck for statistical models of their evolution. Aims.
Bordier E., Sana H., Frost A. J., Libert A.-S., Vrancken J., Mahy L., Toonen S., Tramper F., de Koter A., Lacour S., Le Bouquin J.-B., de Wit W.-J.   +11 more
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Spatial and spectral constraints on resolved mass loss of the massive post-red supergiant star IRAS 17163–3907 and its Fried Egg Nebula

Astronomy & Astrophysics
Context. The fate of massive stars during the latest stages of their evolution is highly dependent on their mass-loss rate and geometry. The geometry of the mass-loss process can be inferred from the shape of the circumstellar material, which has a ...
Koumpia E., Cikota A., de Wit W.-J., Muñoz-Sanchez G., Kim T., Corporaal A., Oudmaijer R. D., Muller S., Vink J. S., Cerrigone L., Zijlstra A., Szczerba R., Asaki Y., Lagadec E., Millour F.   +14 more
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Hidden massive eclipsing binaries in red supergiant systems

Astronomy & Astrophysics
Context. The majority of massive stars are part of binary systems and may interact with their companions during their evolution. This has important consequences for systems in which one star evolves into a red supergiant (RSG).
Jadlovský D., Molnár L., Ercolino A., Bernini-Peron M., Mérand A., Krtička J., Wang L., Ádám R. Z., Baade D., Bayo A., González-Torà G., Granzer T., Henry G. W., Janík J., Kolář J., Kravchenko K., Langer N., Oskinova L. M., Pauli D., Ramachandran V., Rubio A. C., Sander A. A. C., Strassmeier K. G., Weber M., Wittkowski M., Brahm R., Schaffenroth V., Vanzi L., Skarka M.   +28 more
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Chemical Fingerprints of M Dwarfs: High-resolution Spectroscopy on 31 M Dwarfs with SPIRou

The Astrophysical Journal
We extend the methodology introduced by F. Jahandar et al. to determine the effective temperature and chemical abundances of 31 slowly rotating solar neighborhood M dwarfs (M1–M5) using high-resolution spectra from CFHT/SPIRou.
Farbod Jahandar, René Doyon, Étienne Artigau, Neil J. Cook, Charles Cadieux, Jean-François Donati, Nicolas B. Cowan, Ryan Cloutier, Stefan Pelletier, Alan Alves-Brito, Jorge H. C. Martins, Hsien Shang, Andrés Carmona   +12 more
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