Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Anna T P Schauer"'
Autor:
Anna T. P. Schauer, Michael Boylan-Kolchin, Katelyn Colston, Omid Sameie, Volker Bromm, James S. Bullock, Andrew Wetzel
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 1, p 20 (2023)
We study how supersonic streaming velocities of baryons relative to dark matter—a large-scale effect imprinted at recombination and coherent over ∼3 Mpc scales—affect the formation of dwarf galaxies at z ≳ 5. We perform cosmological hydrodyna
Externí odkaz:
https://doaj.org/article/a54b505f94154ae5ad404a283a2d62e4
Autor:
Lewis R Prole, Anna T P Schauer, Paul C Clark, Simon C O Glover, Felix D Priestley, Ralf S Klessen
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:2081-2093
Molecular hydrogen allows cooling in primordial gas, facilitating its collapse into Population III stars within primordial halos. Lyman-Werner (LW) radiation from these stars can escape the halo and delay further star formation by destroying H$_2$ in
Autor:
Omid Sameie, Michael Boylan-Kolchin, Philip F Hopkins, Andrew Wetzel, Xiangcheng Ma, James S Bullock, Kareem El-Badry, Eliot Quataert, Jenna Samuel, Anna T P Schauer, Daniel R Weisz
We perform cosmological hydrodynamical simulations to study the formation of proto-globular cluster candidates in progenitors of present-day dwarf galaxies $(M_{\rm vir} \approx 10^{10}\, {\rm M}_\odot$ at $z=0$) as part of the "Feedback in Realistic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::620b4e2a0479d6b49aad900053fb96b5
http://arxiv.org/abs/2204.00638
http://arxiv.org/abs/2204.00638
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 498:4839-4852
Models of the decoupling of baryons and photons during the recombination epoch predict the existence of a large-scale velocity offset between baryons and dark matter at later times, the so-called streaming velocity. In this paper, we use high resolut
The recent discovery of the extremely lensed Earendel object at $z=6.2$ is remarkable in that it is likely a single star or stellar multiple, observed within the first billion years of cosmic history. Depending on its mass, which is still uncertain b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ce0870142503b444eb60effae1853fc
Autor:
Mattis Magg, Itamar Reis, Anastasia Fialkov, Rennan Barkana, Ralf S Klessen, Simon C O Glover, Li-Hsin Chen, Tilman Hartwig, Anna T P Schauer
Mapping Cosmic Dawn with 21-cm tomography offers an exciting new window into the era of primordial star formation. However, self-consistent implementation of both the process of star formation and the related 21-cm signal is challenging, due to the m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbe55fc35d2cb66e0fcb8efac2b23815
Autor:
Mattis Magg, Anna T. P. Schauer, Ralf S. Klessen, Simon C. O. Glover, Robin G. Tress, Ondrej Jaura
Publikováno v:
The Astrophysical Journal. 929:119
The lack of observations of abundance patterns originating in pair-instability supernovae has been a long-standing problem in relation to the first stars. This class of supernovae is expected to have an abundance pattern with a strong odd-even effect
We demonstrate a new approach of indirectly constraining both early star and structure formation via mature galaxy clusters at cosmic noon (z~2), using the cluster XLSSC 122 as an example. With the standard Press Schechter formalism, we infer a rapid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97d1fa13e5ca6fcbd5eff2ecd945fecd
http://arxiv.org/abs/2004.08479
http://arxiv.org/abs/2004.08479
The influence of streaming velocities and Lyman-Werner radiation on the formation of the first stars
Publikováno v:
MNRAS
The first stars in the Universe, the so-called Population III stars, form in small dark matter minihaloes with virial temperatures $T_{\rm vir} < 10^{4}$~K. Cooling in these minihaloes is dominated by molecular hydrogen (H$_{2}$), and so Population I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1861ee93199e98be1e389f8ee8899020
We derive new constraints on the non-gravitational baryon-dark-matter scattering (BDMS) by evaluating the mass thresholds of dark matter (DM) haloes in which primordial gas can cool efficiently to form Population III (Pop III) stars, based on the tim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64a5d5df70e86b4b68bcdc2522d71b59