Zobrazeno 1 - 10
of 139
pro vyhledávání: '"Ocvirk , Pierre"'
Autor:
Ziegler, Joshua J., Shapiro, Paul R., Dawoodbhoy, Taha, Beniamini, Paz, Kumar, Pawan, Freese, Katherine, Ocvirk, Pierre, Aubert, Dominique, Lewis, Joseph S. W., Teyssier, Romain, Park, Hyunbae, Ahn, Kyungjin, Sorce, Jenny G., Iliev, Ilian T., Yepes, Gustavo, Gottlober, Stefan
Dispersion measures (DM) of fast radio bursts (FRBs) probe the density of electrons in the intergalactic medium (IGM) along their lines-of-sight, including the average density versus distance to the source and its variations in direction. While previ
Externí odkaz:
http://arxiv.org/abs/2411.02699
Autor:
Park, Hyunbae, Jung, Intae, Yajima, Hidenobu, Sorce, Jenny, Shapiro, Paul R., Ahn, Kyungjin, Ocvirk, Pierre, Teyssier, Romain, Yepes, Gustavo, Iliev, Ilian T., Lewis, Joseph S. W.
Recently, NIRSpec PRISM/CLEAR observations by JWST have begun providing rest-frame UV continuum measurements of galaxies at $z\gtrsim7$, revealing signatures of Ly$\alpha$ damping-wing (DW) absorption by the intergalactic medium (IGM). We develop a m
Externí odkaz:
http://arxiv.org/abs/2410.07377
Autor:
Ocvirk, Pierre, Lewis, Joseph S. W., Conaboy, Luke, Dubois, Yohan, Bethermin, Matthieu, Sorce, Jenny G., Aubert, Dominique, Shapiro, Paul R., Dawoodbhoy, Taha, Lee, Joohyun, Teyssier, Romain, Yepes, Gustavo, Gottlöber, Stefan, Iliev, Ilian T., Ahn, Kyungjin, Park, Hyunbae
We investigate the spatial offsets between dust and ultraviolet (UV) emission in high-redshift galaxies using the Cosmic Dawn III (CoDa III) simulation, a state-of-the-art fully coupled radiation-hydrodynamics cosmological simulation. Recent observat
Externí odkaz:
http://arxiv.org/abs/2409.05946
Autor:
Katz, Harley, Rosdahl, Joki, Kimm, Taysun, Blaizot, Jeremy, Choustikov, Nicholas, Farcy, Marion, Garel, Thibault, Haehnelt, Martin G., Michel-Dansac, Leo, Ocvirk, Pierre
The recent launch of JWST has ushered in a new era of high-redshift astronomy by providing detailed insights into the gas and stellar populations of galaxies in the epoch of reionization. Interpreting these observations and translating them into cons
Externí odkaz:
http://arxiv.org/abs/2309.03269
Autor:
Hiegel, Julien, Thélie, Emilie, Aubert, Dominique, Chardin, Jonathan, Gillet, Nicolas, Galois, Pierre, Mai, Nicolas, Ocvirk, Pierre, Ibata, Rodrigo
During the Epoch of reionisation, the intergalactic medium is reionised by the UV radiation from the first generation of stars and galaxies. One tracer of the process is the 21 cm line of hydrogen that will be observed by the Square Kilometre Array (
Externí odkaz:
http://arxiv.org/abs/2307.00609
Autor:
Dawoodbhoy, Taha, Shapiro, Paul R., Ocvirk, Pierre, Lewis, Joseph S. W., Aubert, Dominique, Sorce, Jenny G., Ahn, Kyungjin, Iliev, Ilian T., Park, Hyunbae, Teyssier, Romain, Yepes, Gustavo
When the first galaxies formed and starlight escaped into the intergalactic medium to reionize it, galaxy formation and reionization were both highly inhomogeneous in time and space, and fully-coupled by mutual feedback. To show how this imprinted th
Externí odkaz:
http://arxiv.org/abs/2302.08523
Autor:
Semelin, Benoit, Mériot, Romain, Mertens, Florent, Koopmans, Léon V. E., Aubert, Dominique, Barkana, Rennan, Fialkov, Anastasia, Munshi, Satyapan, Ocvirk, Pierre
Publikováno v:
A&A 672, A162 (2023)
The measurement of the $21$ cm signal from the Cosmic Dawn is a major goal for several existing and upcoming radio interferometers such as NenuFAR and the SKA. During this era before the beginning of the Epoch of Reionization, the signal is more diff
Externí odkaz:
http://arxiv.org/abs/2301.13178
Publikováno v:
A&A 672, A184 (2023)
In the next decade, radio telescopes like the Square Kilometer Array (SKA) will explore the Universe at high redshift, and particularly during the Epoch of Reionisation (EoR). The first structures emerged during this epoch, and their radiations have
Externí odkaz:
http://arxiv.org/abs/2209.11608
Autor:
Sorce, Jenny G., Ocvirk, Pierre, Aubert, Dominique, Gottloeber, Stefan, Shapiro, Paul R., Dawoodbhoy, Taha, Yepes, Gustavo, Ahn, Kyungjin, Iliev, Ilian T., Lewis, Joseph S. W.
Patchy cosmic reionization resulted in the ionizing UV background asynchronous rise across the Universe. The latter might have left imprints visible in present day observations. Several numerical simulation-based studies show correlations between rei
Externí odkaz:
http://arxiv.org/abs/2207.13102
Autor:
Rosdahl, Joakim, Blaizot, Jérémy, Katz, Harley, Kimm, Taysun, Garel, Thibault, Haehnelt, Martin, Keating, Laura C., Martin-Alvarez, Sergion, Michel-Dansac, Léo, Ocvirk, Pierre
We measure escape fractions, $f_{\rm esc}$, of ionizing radiation from galaxies in the SPHINX suite of cosmological radiation-hydrodynamical simulations of reionization, resolving halos with $M_{\rm vir} \gtrapprox 7.5 \times 10^7 \ M_{\odot}$ with a
Externí odkaz:
http://arxiv.org/abs/2207.03232