Results 1 to 10 of about 524,810 (295)
Spectroscopic Orbits of Subsystems in Multiple Stars. IX [PDF]
The Astronomical Journal, 2023 New spectroscopic orbits of inner subsystems in 14 hierarchies are determined from long-term monitoring with the optical echelle spectrometer, CHIRON.
Andrei Tokovinin
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CCD Photometry Using Multiple Comparison Stars [PDF]
Journal of Astronomy and Space Sciences, 2004 The accuracy of CCD observations obtained at the Korean 1.8 m telescope has been studied. Seventeen comparison stars in the vicinity of the cataclysmic variable BG CMi have been measured.
Yonggi Kim +2 more
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Follow-Up and Validation of K2 and TESS Planetary Systems With Keck NIRC2 Adaptive Optics Imaging
Frontiers in Astronomy and Space Sciences, 2021 High resolution imaging (HRI) is a critical part of the transiting exoplanet follow-up and validation process. HRI allows previously unresolved stellar companions and background blends to be resolved, vetting false positive signals and improving the ...
Joshua E. Schlieder +9 more
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Architecture of Hierarchical Stellar Systems and Their Formation
Universe, 2021 Accumulation of new data on stellar hierarchical systems and the progress in numerical simulations of their formation open the door to genetic classification of these systems, where properties of a certain group (family) of objects are tentatively ...
Andrei Tokovinin
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Frontiers in Astronomy and Space Sciences, 2021 Two new imaging instruments, ‘Alopeke and Zorro, were designed, built, and commissioned at the Gemini-North and Gemini-South telescopes in 2018 and 2019, respectively. Here we describe them and present the results from over a year of operation.
Nicholas J. Scott +11 more
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Multiplicity of Massive Stars [PDF]
Symposium - International Astronomical Union, 2001 We discuss the observed multiplicity of massive stars and implications on theories of massive star formation. After a short summary of the literature on massive star multiplicity, we focus on the O-and B-type stars in the Orion Nebula Cluster, which constitute a homogenous sample of very young massive stars.
Preibisch, Thomas +2 more
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Dynamics of Four Triple Systems
The Astronomical Journal, 2023 Orbital motions in four hierarchical stellar systems discovered by speckle interferometry are studied. Their inner orbits are relatively well constrained, while the long outer orbits are less certain.
Andrei Tokovinin
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V907 Sco Switched to the Eclipsing Mode Again
The Astronomical Journal, 2023 V907 Scorpii is a unique triple system in which the inner binary component has been reported to have switched on and off eclipses several times in modern history.
Petr Zasche +3 more
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Multiple Populations in Star Clusters
Universe, 2022 We review the multiple population (MP) phenomenon of globular clusters (GCs): i.e., the evidence that GCs typically host groups of stars with different elemental abundances and/or distinct sequences in photometric diagrams. Most Galactic and extragalactic clusters exhibit internal variations of He, C, N, O, Na, and Al.
Milone, Antonino P, Marino, AF
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Born to Be Wide: The Distribution of Wide Binaries in the Field and Soft Binaries in Clusters
The Astrophysical Journal, 2023 Most stars, binaries, and higher-multiplicity systems are thought to form in stellar clusters and associations that later dissociate. Very wide binaries can be easily disrupted in clusters due to dynamical evaporation (soft binaries) and/or tidal ...
Mor Rozner, Hagai B. Perets
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