Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Stacy, Athena"'
Beginning with cosmological initial conditions at z=100, we simulate the effects of magnetic fields on the formation of Population III stars and compare our results with the predictions of Paper I. We use Gadget-2 to follow the evolution of the syste
Externí odkaz:
http://arxiv.org/abs/2201.02225
While magnetic fields are important in contemporary star formation, their role in primordial star formation is unknown. Magnetic fields of order 10^-16 G are produced by the Biermann battery due to the curved shocks and turbulence associated with the
Externí odkaz:
http://arxiv.org/abs/2006.14607
Recent numerical simulations have suggested the probability of a fraction of the primordial stars to be ejected from the cluster of their origin. We explore the possibility that some of these can remain on the main sequence till the present epoch. We
Externí odkaz:
http://arxiv.org/abs/1912.08099
Recent numerical simulations have suggested the probability of a fraction of the primordial stars being ejected from the cluster of their origin. We explore the possibility that some of these can remain on the main sequence until the present epoch. W
Externí odkaz:
http://arxiv.org/abs/1712.06912
We simulate the growth of a Population III stellar system, starting from cosmological initial conditions at z=100. We follow the formation of a minihalo and the subsequent collapse of its central gas to high densities, resolving scales as small as ~
Externí odkaz:
http://arxiv.org/abs/1603.09475
Autor:
Hartwig, Tilman, Volonteri, Marta, Bromm, Volker, Klessen, Ralf S., Barausse, Enrico, Magg, Mattis, Stacy, Athena
Gravitational waves (GWs) provide a revolutionary tool to investigate yet unobserved astrophysical objects. Especially the first stars, which are believed to be more massive than present-day stars, might be indirectly observable via the merger of the
Externí odkaz:
http://arxiv.org/abs/1603.05655
We explore the impact of a cosmic ray (CR) background generated by supernova explosions from the first stars on star-forming metal-free gas in a minihalo at $z\sim25$. Starting from cosmological initial conditions, we use the smoothed particle hydrod
Externí odkaz:
http://arxiv.org/abs/1602.06948
Autor:
Stacy, Athena Ranice
The formation of the first stars, also known as Population III (Pop III), marked a pivotal point in the universe's evolution from relative smoothness and homogeneity to its current highly structured state. In this dissertation we study key aspects of
Externí odkaz:
http://hdl.handle.net/2152/ETD-UT-2011-08-4412
We investigate the impact of a cosmic X-ray background (CXB) on Population III stars forming in a minihalo at $z\simeq25$. Using the smoothed particle hydrodynamics code GADGET-2, we attain sufficient numerical resolution to follow gas collapsing int
Externí odkaz:
http://arxiv.org/abs/1407.1847
We use cosmological simulations of high-redshift minihalos to investigate the effect of dark matter annihilation (DMA) on the collapse of primordial gas. We numerically investigate the evolution of the gas as it assembles in a Population III stellar
Externí odkaz:
http://arxiv.org/abs/1312.3117