Results 101 to 110 of about 12,301 (190)

Which is the most eccentric binary known? Insights from the 2023/4 pericenter passages of Zeta Boötis and Eta Ophiuchi

The Open Journal of Astrophysics
There is a clear dearth of very eccentric binaries among those for which individual eccentricities can be measured. In this paper we report on observations of the two nearby, bright and very eccentric visual binaries Zeta Bo\"otis ($\zeta$ Boo) and Eta ...
Idel Waisberg, Ygal Klein, Boaz Katz
doaj   +1 more source

The Triple System V1371 Tau: An Eclipsing Binary with an Outer Be Star

The Astrophysical Journal
Although triple systems are common, their orbital dynamics and stellar evolution remain poorly understood. We investigated the V1371 Tau system using TESS photometry, multiepoch spectroscopy, and recent interferometric data, confirming it as a rare ...
Danilo F. Rocha, Marcelo Emilio, Jonathan Labadie-Bartz, Coralie Neiner, Julia Bodensteiner, Tomer Shenar, Laerte Andrade, Michael Abdul-Masih, Felipe Navarete, Alessandro Melo, Eduardo Janot-Pacheco, Romualdo Eleutério, Alan W. Pereira   +12 more
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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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An interferometric study of the post-AGB binary 89 Herculis I Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array

, 2013
Binary post-AGB stars are interesting laboratories to study both the evolution of binaries as well as the structure of circumstellar disks. A multiwavelength high angular resolution study of the prototypical object 89 Herculis is performed with the aim ...
Banerjee, D. P. K., Brummelaar, T. ten, Chesneau, O., Farrington, C., Hillen, M., Hummel, C. A., Monnier, J. D., Mourard, D., Tycner, C., Van Winckel, H., Verhoelst, T., Zavala, R. T.   +11 more
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A purely geometric distance to the binary star Atlas, a member of the Pleiades

, 2004
We present radial velocity and new interferometric measurements of the double star Atlas, which permit, with the addition of published interferometric data, to precisely derive the orbital parameters of the binary system and the masses of the components.
Debernardi, Y., Eyer, L., Galland, F., Groenewegen, M. A. T., Hummel, C., North, P., Zwahlen, N.   +6 more
core   +1 more source

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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Probing the close environment of young stellar objects with interferometry

, 2003
The study of Young Stellar Objects (YSOs) is one of the most exciting topics that can be undertaken by long baseline optical interferometry. The magnitudes of these objects are at the edge of capabilities of current optical interferometers, limiting the ...
A Natta, B Reipurth, C Bertout, CJ Burrows, CP Dullemond, D Lynden-Bell, D Ward-Thompson, EI Chiang, F Malbet, F Malbet, F Malbet, FC Adams, GH Herbig, J-L Monin, JD Monnier, JP Berger, KR Stapelfeldt, L Hartmann, LA Hillenbrand, N Calvet, NI Shakura, P André, PG Tuthill, PG Tuthill, PJV Garcia, R Lachaume, R Millan-Gabet, R Millan-Gabet, R.L. Akeson, RL Akeson, RP Nelson, S Wolf, SJ Kenyon, SVW Beckwith, T Boehm, V Mendoza, V Mendoza   +36 more
core   +2 more sources

Long-Baseline Interferometric Multiplicity Survey of the Sco-Cen OB Association

, 2013
We present the first multiplicity-dedicated long baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B- type
Brummelaar, T. ten, Haubois, X., Ireland, M. J., Jacob, A., Kok, Y., Kraus, A. L., Laliberte-Houdeville, C., Norris, B., Rizzuto, A. C., Robertson, J. G., Tango, W. J., Tuthill, P. G., Warrington, B. A.   +12 more
core   +1 more source

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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Interferometric observations of the circumstellar disk environments in close binary stars

, 2018
The inner structure of protoplanetary disks can be strongly affected by the presence of the companion in close binary stars with ~au separation, where the dispersal of the circumstellar components may occur over time scales as short as 10000 yrs. The interferometric view helps us to understand better the disk-binary interaction in such systems.
openaire   +1 more source