Results 31 to 40 of about 694,028 (301)
Odessa Astronomical Publications, 2017 Results of computations of the lithium statistical equilibrium in atmospheres of Teff = 6270, 5770, 5270 and lg g = 4.44 dwarfs of metallicities [μ] = -0, - 1, - 2, - 3 are discussed. It is shown that NLTE corrections are less then 0.1 dex for abundances
Ya. V. Pavlenko, L. A. Yakovina
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2021 A non-local and time-dependent theory of convection was briefly described. This theory was used to calculate the structure of solar convection zones, the evolution of massive stars, lithium depletion in the atmosphere of the Sun and late-type dwarfs, and
Da-run Xiong
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Lithium-Rich Stars in the LAMOST Survey [PDF]
, 2017 Lithium is a key element for an observational study of stellar interiors. Its extreme fragility makes it a sensitive measure of the ages of young stars, and an excess abundance of lithium in a small fraction of evolved stars has driven significant ...
Esdaile, James
core +1 more source
DEPLETION OF TiO AND SPECTRA OF THE COOLEST BROWN DWARFS
Odessa Astronomical Publications, 2017 This study was performed in the context of the ”lithium test” for brown dwarfs proposed by Rebolo et al. (1992). We consider the formation of lithium dust species in atmospheres of the coolest stars and substellar objects.
Ya. V. Pavlenko
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Some features of roAp stars spectrum
Odessa Astronomical Publications, 2017 We have shown the possibility for modelling Li blend6708 A, for two roAp stars, HD83368 and HD60435, taking into account lithium spots on the surfaces of these rotating stars. REE spots were also included in calculations.
A. V. Shavrina +6 more
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The Astrophysical Journal LettersCurrent observations indicate that stars with higher rotation rates appear to maintain more surface lithium, and the majority of lithium-rich giants are indeed red clump stars.
Xue-Feng Li +4 more
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Lithium abundances in carbon stars
The Astrophysical Journal, 1991 High-dispersion, high signal-to-noise ratio spectra near 6707 A have provided Li abundances for 29 cool carbon stars. The Li abundances are on average lower than found for M giants. This difference may be due to a systematic underestimate of the carbon stars' effective temperatures by 200-400 K. It is possible that Li may be destroyed at the base of an
Grant R. Denn +2 more
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GelMA‐based 3D spheroids recapitulate transcriptomic and functional hallmarks of myeloid sarcoma
FEBS Open Bio, EarlyView.GelMA 5% hydrogels support the formation of myeloid leukemia spheroids that recapitulate MS‐specific features, including G1 arrest, apoptosis, and ECM‐driven transcriptomic reprogramming. The 3D model mimicked soft‐tissue‐like stiffness and oxygen conditions, and transcriptomic convergence with primary MS samples confirmed its utility as a preclinical ...
Nicolas Germain +11 more
wiley +1 more source
The enigma of lithium in roAp stars [PDF]
Proceedings of the International Astronomical Union, 2004 An internacional project "Lithium in magnetic Ap stars" has been run since 1996 with the purpose of creating an observational database allowing systematic studies of the ab- normal occurence of lithium on the surface of cool Ap stars. The 2.6 m telescope at the Crimean Astrophysical Observatory, the ESO CAT, ESO 1.52 m telescope with FEROS, the Nordic ...
Polosukhina, N. +9 more
openaire +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Sleep disturbances have been implicated as a risk factor for developing Alzheimer's disease (AD), but evidence linking plasma AD biomarkers to sleep in cognitively unimpaired individuals remains limited. The present study examined associations between evening, morning, and overnight changes in plasma AD biomarkers and measures of ...
Cornelia Sauter +5 more
wiley +1 more source