Results 61 to 70 of about 96,398 (314)

Mining Double-line Spectroscopic Candidates in the LAMOST Medium-resolution Spectroscopic Survey Using a Human–AI Hybrid Method

The Astrophysical Journal Supplement Series
We utilize a hybrid approach that integrates the traditional cross-correlation function (CCF) and machine learning to detect spectroscopic multiple star systems, specifically focusing on double-line spectroscopic binaries (SB2s).
Shan-shan Li, Chun-qian Li, Chang-hua Li, Dong-wei Fan, Yun-fei Xu, Lin-ying Mi, Chen-zhou Cui, Jian-rong Shi   +7 more
doaj   +1 more source

The primordial binary population II: Recovering the binary population for intermediate mass stars in Sco OB2

, 2007
We characterize the binary population in the young and nearby OB association Scorpius OB2 using available observations of visual, spectroscopic, and astrometric binaries with intermediate-mass primaries.
A. G. A. Brown, Alencar, Andersen, Bahcall, Balega, Barbier-Brossat, Basri, Bate, Bertiau, Blaauw, Blaauw, Bouy, Brown, Brown, Buscombe, Chabrier, Chanamé, Chen, Close, Correia, Cruzalebes, de Bruijne, de Geus, de Zeeuw, Duflot, Duquennoy, Eggleton, Evans, Fryer, Fryer, Girardi, Gualandris, Hanson, Hartkopf, Heacox, Heacox, Heggie, Hillebrandt, Hills, Hoogerwerf, Hut, Jilinski, Jordi, Kouwenhoven, Kouwenhoven, Kraicheva, Kraus, Kraus, Kroupa, Kroupa, Kroupa, Kroupa, Kurosawa, L. Kaper, Levato, Lindegren, Lindroos, M. B. N. Kouwenhoven, Malkov, Mamajek, Mason, Mason, Mathieu, Mathis, McAlister, Meibom, Meynet, Miura, Oblak, Palla, Perryman, Perryman, Plummer, Portegies Zwart, Portegies Zwart, Preibisch, Preibisch, Preibisch, Robin, S. F. Portegies Zwart, Shatsky, Slesnick, Slettebak, Sowell, Svechnikov, Söderhjelm, Thackeray, Tokovinin, Tokovinin, van Albada, van den Heuvel, Vereshchagin, Verschueren, Worley, Worley, Yungelson   +95 more
core   +1 more source

CALPHAD‐Guided Prediction and Interpretation of Phase Formation in Ta–Mo–Cr–Ti–Al Refractory High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
This study designs Ta–Mo–Cr–Ti–Al refractory high‐entropy alloys with a disordered body‐centered‐cubic A2 crystal structure aiming for improved ductility, lower density, and oxidation resistance. Four alloy compositions are identified by thermodynamic calculations.
Kateryna Khanchych, Chongchong Tang, Carsten Schroer, Björn Schäfer, Judith Jung, Michael Dürrschnabel, Ute Jäntsch, Bronislava Gorr   +7 more
wiley   +1 more source

Verification of Gaia Data Release 3 Single-lined Spectroscopic Binary Solutions With Three Transiting Low-mass Secondaries

The Astronomical Journal, 2023
While secondary mass inferences based on single-lined spectroscopic binary (SB1) solutions are subject to $\sin i$ degeneracies, this degeneracy can be lifted through the observations of eclipses.
Stephen P. Schmidt, Kevin C. Schlaufman, Keyi Ding, Samuel K. Grunblatt, Theron Carmichael, Allyson Bieryla, Joseph E. Rodriguez, Jack Schulte, Noah Vowell, George Zhou, Samuel N. Quinn, Samuel W. Yee, Joshua N. Winn, Joel D. Hartman, David W. Latham, Douglas A. Caldwell, M. M. Fausnaugh, Christina Hedges, Jon M. Jenkins, Hugh P. Osborn, S. Seager   +20 more
doaj   +1 more source

Binary Companions of Evolved Stars in APOGEE DR14: Search Method and Catalog of ∼5000 Companions [PDF]

Astronomical Journal, 2018
Multi-epoch radial velocity measurements of stars can be used to identify stellar, substellar, and planetary-mass companions. Even a small number of observation epochs can be informative about companions, though there can be multiple qualitatively ...
A. Price-Whelan, D. Hogg, H. Rix, Nathan De Lee, S. Majewski, D. Nidever, N. Troup, J. Fernández-Trincado, D. A. Garc'ia-Hern'andez, P. Longa-Peña, C. Nitschelm, J. Sobeck, O. Zamora   +12 more
semanticscholar   +1 more source

Impact of Hot Isostatic Pressing on Microstructure Evolution and Creep Performance of Powder Bed Fusion–Laser Beam Processed CM247LC

Advanced Engineering Materials, EarlyView.
The influence of Hot Isostatic Pressing (HIP) temperature on the microstructure and creep performance of powder bed fusion–laser beam processed CM247LC superalloy is investigated. Grain growth and γ’ precipitate evolution are characterized following HIP at varying temperatures.
Ahmed Fardan, Johannes Gårdstam, Eva Oscarsson, Håkan Brodin, Eduard Hryha   +4 more
wiley   +1 more source

Spectroscopic Orbits of Subsystems in Multiple Stars. XI

The Astronomical Journal
Adding to the large radial velocity survey of nearby solar-type stars (summary in Tokovinin, 2023a), spectroscopic orbits are determined for four hierarchical systems: HIP 49442 (inner and outer periods of 164.55 days and 34 yr, respectively), HIP 55691 (
Andrei Tokovinin
doaj   +1 more source

Discovery of the Exceptionally Short Period Ultracool Dwarf Binary LP 413-53AB

The Astrophysical Journal Letters, 2023
We report the detection of large-amplitude, rapid radial velocity (RV) variations and line-splitting in high-resolution Keck/NIRSPEC spectra of the M9 dwarf LP 413-53. We attribute these features to binary motion.
Chih-Chun Hsu, Adam J. Burgasser, Christopher A. Theissen   +2 more
doaj   +1 more source

Bayesian analysis of exoplanet and binary orbits

, 2012
We introduce BASE (Bayesian astrometric and spectroscopic exoplanet detection and characterisation tool), a novel program for the combined or separate Bayesian analysis of astrometric and radial-velocity measurements of potential exoplanet hosts and ...
Armstrong, Armstrong, Bayes, Bond, Brooks, Charbonneau, Delplancke, Ford, Gatewood, Gelman, Gregory, Hastings, Holman, Hummel, Hummel, Koch, Kuhn, Lange, Lindegren, Lyot, Mahalanobis, Mamajek, Mao, Marois, Mayor, McArthur, Metropolis, Nascimbeni, Perryman, Perryman, Pickering, Prevot, R. Launhardt, Reffert, Seager, Shao, Smith, Smith, Sozzetti, T. Henning, T. Schulze-Hartung, Thiele, Tolbert, Vigan, Vogt, Wolszczan   +45 more
core   +1 more source

The effect of tides on near-core rotation: analysis of 35 Kepler γ Doradus stars in eclipsing and spectroscopic binaries [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We systematically searched for gravity- and Rossby-mode period spacing patterns in Kepler eclipsing binaries with γ Doradus pulsators. These stars provide an excellent opportunity to test the theory of tidal synchronization and angular momentum ...
Gang Li, Zhao Guo, J. Fuller, T. Bedding, S. Murphy, I. Colman, D. Hey   +6 more
semanticscholar   +1 more source