Results 1 to 10 of about 5,332 (183)
NLTE Analysis of Y i and Y ii in the Atmospheres of FGK Stars
The Astrophysical Journal, 2023 The nonlocal thermodynamical equilibrium (NLTE) line formation of Y i and Y ii is considered in 1D LTE model atmospheres of FGK-type stars. The model atom was constructed with the most up-to-date atomic data, including quantum cross sections and rate ...
Sofya Alexeeva +7 more
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The chemodynamical evolution of the Milky Way disc -- A new modeling approach
, 2013 Despite the recent advancements in the field of galaxy formation and evolution, fully self-consistent simulations are still unable to make the detailed predictions necessary for the planned and ongoing large spectroscopic and photometry surveys of the ...
Chiappini, Cristina +2 more
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Barium Stars across the Milky Way: Probing Their Origins via the GALAH Survey
The Astrophysical JournalBarium stars are unusually enriched in barium ([Ba/Fe] ≥ 1.0 dex) and not predicted by current Galactic chemical evolution models. Previous observations of barium stars have found evidence that they form through mass transfer from a companion asymptotic ...
Jaden Levine +6 more
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All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity
The Astrophysical Journal, 2023 We explore the kinematic and chemical properties of the Monoceros stellar overdensity by combining data from the Two Micron All Sky Survey, Wide-field Infrared Survey Explorer, APOGEE, and Gaia.
Lais Borbolato +9 more
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The Rise of the r-process in the Gaia-Sausage/Enceladus Dwarf Galaxy
The Astrophysical JournalNeutron star mergers (NSMs) produce r -process elements after a time-delayed inspiral process. Once a significant number of NSMs are present in a galaxy, r -process elements, such as Eu, are expected to significantly increase with time.
Xiaowei Ou +4 more
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EPJ Web of Conferences, 2017 A period of quenching between the formation of the thick and thin disks of the Milky Way has been recently proposed to explain the observed age-[α/Fe] distribution of stars in the solar neighbourhood.
Thomas Alexandra +7 more
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, 2012 We investigate the physical properties of the progenitors of today living Milky Way-like galaxies that are visible as Damped Lya Absorption systems and Lya Emitters at higher redshifts (z ~ 2.3,5.7).
Ferrara, Andrea, Salvadori, Stefania
core +3 more sources
StarFlow: Leveraging Normalizing Flows for Stellar Age Estimation in SDSS-V DR19
The Astronomical JournalUnderstanding the ages of stars is crucial for unraveling the formation history and evolution of our Galaxy. Traditional methods for estimating stellar ages from spectroscopic data often struggle with providing appropriate uncertainty estimations and are
Alexander Stone-Martinez +7 more
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Starry Messages: Searching for Signatures of Interstellar Archaeology
, 2009 Searching for signatures of cosmic-scale archaeological artifacts such as Dyson spheres or Kardashev civilizations is an interesting alternative to conventional SETI.
Carrigan Jr, Richard A.
core
The Astrophysical JournalStellar spectra emulators often rely on large grids and tend to reach a plateau in emulation accuracy, leading to significant systematic errors when inferring stellar properties.
Tomasz Różański +2 more
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