Results 41 to 50 of about 7,730,975 (288)

YONSEI EVOLUTIONARY POPULATION SYNTHESIS (YEPS) MODEL. I. SPECTROSCOPIC EVOLUTION OF SIMPLE STELLAR POPULATIONS [PDF]

The Astrophysical Journal Supplement Series, 2012
We present a series of papers on the year-2012 version of Yonsei Evolutionary Population Synthesis (YEPS) model which is constructed on over 20 years of heritage. This first paper delineates the spectroscopic aspect of integrated light from stellar populations older than 1 Gyr.
Chung, Chul, Yoon, Suk-Jin, Lee, Sang-Yoon, Lee, Young-Wook   +3 more
openaire   +2 more sources

Characterization of Population III Stars with Stellar Atmosphere and Evolutionary Modeling and Predictions of their Observability with the JWST

The Astronomical Journal, 2022
Abstract Population III stars were the first stars to form after the Big Bang and are believed to have made the earliest contribution to the metal content of the universe beyond the products of the Big Bang nucleosynthesis.
Mikaela M. Larkin, Roman Gerasimov, Adam J. Burgasser   +2 more
openaire   +2 more sources

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

Evolution and nucleosynthesis of asymptotic giant branch stellar models of low metallicity [PDF]

, 2014
We present stellar evolutionary tracks and nucleosynthetic predictions for a grid of stellar models of low- and intermediate-mass asymptotic giant branch (AGB) stars at Z = 0.001 ([Fe/H] =-1.2).
Lugaro, Maria, Karakas, Amanda, Yong, David, Fishlock, Cherie, Fishlock, Ch. K., Yong, D., Karakas, A. I.   +6 more
core   +1 more source

Evolutionary models of rotating dense stellar systems: challenges in software and hardware [PDF]

Proceedings of the International Astronomical Union, 2014
AbstractWe present evolutionary models of rotating self-gravitating systems (e.g. globular clusters, galaxy cores). These models are characterized by the presence of initial axisymmetry due to rotation. Central black hole seeds are alternatively included in our models, and black hole growth due to consumption of stellar matter is simulated until the ...
openaire   +1 more source

ON THE RELIABILITY OF STELLAR AGES AND AGE SPREADS INFERRED FROM PRE-MAIN-SEQUENCE EVOLUTIONARY MODELS [PDF]

The Astrophysical Journal, 2011
13 pages, 10 figures, accepted for publication in ...
Hosokawa, Takashi, Offner, Stella S. R., Krumholz, Mark   +2 more
openaire   +3 more sources

Microbiome−host proteostasis crosstalk—An emerging perspective on mechanisms and interventions toward healthy longevity

FEBS Letters, EarlyView.
Proteostasis and the gut microbiota play a key role in shaping host physiology. Microbiota‐derived metabolites, vitamins, and RNA modulate host proteostasis. Findings from model systems, including C. elegans, indicate microbes can either stabilize or disrupt host proteostasis.
Abhishek Anil Dubey, Maria Ermolaeva
wiley   +1 more source

Stellar models grids White Dwarfs, 0.2 to 8.0 Msun [Dataset]

, 2023
One of the most reliable means of studying the stellar interior is through the apsidal motion in double line eclipsing binary systems since these systems present errors in masses, radii, and effective temperatures of only a few per cent.
Claret, A.
core   +1 more source

Metallicity Dependence of Internal Structure Coefficients in 1–2 M⊙ Stars and Application to the Eclipsing Binary BW Aquarii

The Astrophysical Journal
We investigate how metallicity ( Z = 0.0001–0.03) shapes the internal structure of 1.0–2.0 M _⊙ stars by quantifying the apsidal-motion constant k _2 and the related structural coefficients η _2 and Δ _2 , together with the radial derivative d η _2 /dr ...
G. Inlek, E. Budding
doaj   +1 more source

Pulsation periods reveal tension between theoretical and empirical radii for classical Cepheids in eclipsing binary systems

Astronomy & Astrophysics
Context. With their precisely determined physical parameters, classical Cepheids in eclipsing binary systems are often used to constrain stellar evolution and pulsation theories.
Ziółkowska O., Smolec R., Singh Rathour R., Hocdé V.   +3 more
doaj   +1 more source