Results 31 to 40 of about 8,519,684 (295)
Evolution of Low‐Mass Population III Stars [PDF]
The Astrophysical Journal, 2007 We present the evolutionary models of metal-free stars in the mass range from 0.8 to 1.2 Msun with up-to-date input physics. The evolution is followed to the onset of hydrogen mixing into a convection, driven by the helium flash at red giant or asymptotic giant branch phase.
Suda, Takuma +2 more
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Simulating the Formation of Primordial Proto‐Stars [PDF]
, 2008 We study the formation of primordial proto-stars in a ΛCDM universe using high-resolution cosmological simulations. Our approach includes all the relevant atomic and molecular physics necessary to follow the thermal evolution of a prestellar gas cloud to
Yoshida, Naoki, Naoki Yoshida
core +1 more source
Population III star clusters in the reionized Universe [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 13 pages, 6 figures, accepted for publication in ...
openaire +3 more sources
Machine Learning Detects Multiplicity of the First Stars in Stellar Archaeology Data
The Astrophysical Journal, 2023 In unveiling the nature of the first stars, the main astronomical clue is the elemental compositions of the second generation of stars, observed as extremely metal-poor (EMP) stars, in the Milky Way.
Tilman Hartwig +4 more
doaj +1 more source
The Persistence of Population III Star Formation [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We present a semi-analytic model of star formation in the early universe, beginning with the first metal-free stars. By employing a completely feedback-limited star formation prescription, stars form at maximum efficiency until the self-consistently calculated feedback processes halt formation.
Richard H Mebane +2 more
openaire +4 more sources
Formation of Massive and Wide First-star Binaries in Radiation Hydrodynamic Simulations
The Astrophysical Journal, 2023 We study the formation of Population III stars by performing radiation hydrodynamic simulations for three different initial clouds extracted from cosmological hydrodynamic simulations.
Kazuyuki Sugimura +4 more
doaj +1 more source
Evolving Spectra of Population III Stars: Consequences for Cosmological Reionization [PDF]
, 2003 We examine the significance of the first metal-free stars (Population III) for the cosmological reionization of H I and He II. These stars have unusually hard spectra, with the integrated ionizing photon rates from a Population III stellar cluster for H ...
Shull, J +5 more
core +1 more source
The Astrophysical Journal, 2023 We explore the chemodynamical properties of a sample of very metal-poor (VMP) stars selected from the Hamburg/ESO survey, matched with Gaia EDR3, in the phase space identified by the three integrals of motion ( L _z , E , I _3 ). Disk and halo orbits are
Daniela Carollo +3 more
doaj +1 more source
, 2022 openLe stelle più povere di metalli dell’alone galattico e delle galassie nane satelliti della Via Lattea offrono un’opportunità unica per fare luce sulle stelle di popolazione III.
BHATTI, ROBEN
core
The Impact of Patchy Reionization on Ultrafaint Dwarf Galaxies
The Astrophysical Journal, 2023 We investigate how patchy reionization affects the star formation history (SFH) and stellar metallicity of ultrafaint dwarf galaxies (UFDs). Patchy reionization refers to varying ultraviolet background strengths depending on a galaxy’s environment ...
Jaeeun Kim +5 more
doaj +1 more source