Results 11 to 20 of about 7,265,864 (288)
Dynamical Masses and Stellar Evolutionary Model Predictions of M Stars [PDF]
The Astrophysical Journal, 2021 Abstract In this era of Gaia and ALMA, dynamical stellar mass measurements, derived from spatially and spectrally resolved observations of the Keplerian rotation of circumstellar disks, provide benchmarks that are independent of observations of stellar characteristics and their uncertainties. These benchmarks can then be used to validate
Jamila Pegues +11 more
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Probing high-mass stellar evolutionary models with binary stars [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractMass discrepancy is one of the problems that is pending a solution in (massive) binary star research field. The problem is often solved by introducing an additional near core mixing into evolutionary models, which brings theoretical masses of individual stellar components into an agreement with the dynamical ones.
Tkachenko, A.
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Benchmarking pre-main sequence stellar evolutionary tracks using disk-based dynamical stellar masses
Astronomy & AstrophysicsStellar masses are a fundamental property to understand models of pre-main sequence evolution, but their values derived from Hertzsprung–Russell (HR) diagrams are strongly model dependent.
Zallio Luigi +16 more
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The Astrophysical JournalWe present dynamical masses for 23 pre-main-sequence (PMS) K- and M-type stars in the Upper Scorpius star-forming region. These masses were derived from the Keplerian rotation of CO disk gas using the Markov Chain Monte Carlo radiative-transfer package ...
A. P. M. Towner +4 more
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The Astrophysical Journal, 2023 The Jao Gap, a 17% decrease in stellar density at M _G ∼ 10 identified in both Gaia Data Release 2 and Early Data Release 3, presents a new method to probe the interior structure of stars near the fully convective transition mass.
Thomas M. Boudreaux, Brian C. Chaboyer
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Radiative Transfer in 3D Model Stellar Atmospheres
, 2003 Recently 3D hydrodynamical simulations of stellar surface convection have become feasible thanks to advances in computer technology and efficient numerical algorithms. Available observational diagnostics indicate that these models are highly realistic in
Asplund, Martin,, Collet, Remo,
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Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present the HR-pyPopStar model, which provides a complete set (in ages) of high-resolution (HR) spectral energy distributions of Single Stellar Populations. The model uses the most recent high-wavelength-resolution theoretical atmosphere libraries for main-sequence, post-AGB/planetary nebulae and Wolf–Rayet stars.
I Millán-Irigoyen +5 more
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The Ages of Galactic Bulge Stars with Realistic Uncertainties
The Astrophysical Journal, 2023 Using modern isochrones with customized physics and carefully considered statistical techniques, we recompute the age distribution for a sample of 91 microlensed dwarfs in the Galactic bulge presented by Bensby et al.
Meridith Joyce +5 more
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The Astrophysical Journal Supplement Series, 2023 We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics ( MESA ). The new auto _ diff module implements automatic differentiation in MESA , an enabling capability that alleviates the need for ...
Adam S. Jermyn +21 more
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Astrophysical Properties of 600 Bona Fide Single Stars in the Hyades Open Cluster
The Astronomical Journal, 2023 The determination of the astrophysical properties of stars remains challenging and frequently relies on the application of stellar models. Stellar sequences in nearby open clusters provide some of the best means to test and calibrate stellar evolutionary
Wolfgang Brandner +2 more
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