Results 31 to 40 of about 300,825 (275)

Population III by Popular Demand - Progress and Previews [PDF]

open access: yes, 1999
I discuss the ongoing search for stars of the Milky Way which have been referred to as members of Population III. Following a discussion of possible definitions for these stars, I consider the reasons why astronomers have undertaken this search, and list
Beers, Timothy C.
core   +3 more sources

Understanding the Early Stages of Galaxy Formation Using Very Metal-poor Stars from the Hamburg/ESO Survey

open access: yesThe 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

High Energy neutrino signals from the Epoch of Reionization [PDF]

open access: yes, 2007
We perform a new estimate of the high energy neutrinos expected from GRBs associated with the first generation of stars in light of new models and constraints on the epoch of reionization and a more detailed evaluation of the neutrino emission yields. We
F. Iocco   +4 more
core   +3 more sources

The most massive Population III stars

open access: yesMonthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Recent data from the JWST suggest that there are realistic prospects for detecting the earliest generation of stars at redshift ∼20. These metal-poor, gaseous Population III (Pop III) stars are likely in the mass range $10\!-\!10^3\, {\rm M}_{\odot }$ .
Chantavat, Teeraparb   +2 more
openaire   +3 more sources

Dust Production Factories in the Early Universe: Formation of Carbon Grains in Red-supergiant Winds of Very Massive Population III Stars [PDF]

open access: yes, 2014
We investigate the formation of dust in a stellar wind during the red-supergiant (RSG) phase of a very massive Population III star with the zero-age main sequence mass of 500 M_sun.
Kozasa, Takashi   +5 more
core   +1 more source

The Evolution of Population III and Extremely Metal-poor Binary Stars

open access: yesThe Astrophysical Journal, 2023
Numerical simulations have now shown that Population III (Pop III) stars can form in binaries and small clusters and that these stars can be in close proximity to each other.
Sung-Han Tsai   +4 more
doaj   +1 more source

Magnetohydrodynamics of Population III Star Formation [PDF]

open access: yesAIP Conference Proceedings, 2010
The evolution of collapsing primordial clouds and the formation of Population III (Pop III) protostars are investigated with three‐dimensional ideal MHD simulations. We follow the collapse of parsec‐sized primordial clouds down to the formation of protostars on sub‐AU scales.
Masahiro N. Machida   +5 more
openaire   +1 more source

The masses of Population III stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1989
La formation de proto-etoiles de Population III est etudiee en suivant l'hypothese que la permanence des fluctuations de masse 10-1000 M○. apres l'ere de recombinaison peut etre importante dans la fragmentation des nuages massifs de masse ∼M J pour former des etoiles de population III, ou M J est la masse de Jeans pendant l'ere de ...
J. C. N. de Araujo, R. Opher
openaire   +1 more source

Modelling the chemical evolution of the Galaxy halo [PDF]

open access: yes, 2013
We study the chemical evolution and formation of the Galactic halo through the analysis of its stellar metallicity distribution function and some key elemental abundance patterns.
Brusadin, G., Matteucci, F., Romano, D.
core   +2 more sources

Chemical constraints on the contribution of Population III stars to cosmic reionization

open access: yes, 2013
Recent studies have highlighted that galaxies at z = 6-8 fall short of producing enough ionizing photons to reionize the IGM, and suggest that Population III stars could resolve this tension, because their harder spectra can produce ~10x more ionizing ...
Hennawi, Joseph F.   +3 more
core   +2 more sources

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