Results 21 to 30 of about 36,124 (299)

The effect of reionization on the COBE normalization [PDF]

, 2001
We point out that the effect of reionization on the microwave anisotropy power spectrum is not necessarily negligible on the scales probed by COBE. It can lead to an upward shift of the COBE normalization by more than the one-sigma error quoted ignoring ...
L. M. Griffiths, Andrew R. Liddle
openalex   +4 more sources

First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum [PDF]

Astrophysical Journal, 2021
We report upper limits on the Epoch of Reionization 21 cm power spectrum at redshifts 7.9 and 10.4 with 18 nights of data (∼36 hr of integration) from Phase I of the Hydrogen Epoch of Reionization Array (HERA).
T. H. Collaboration, Z. Abdurashidova, J. Aguirre, P. Alexander, Z. Ali, Yanga Balfour, A. Beardsley, G. Bernardi, T. Billings, J. Bowman, R. Bradley, P. Bull, J. Burba, S. Carey, C. Carilli, Carina Cheng, D. DeBoer, M. Dexter, E. D. L. Acedo, Taylor Dibblee-Barkman, J. Dillon, J. Ely, A. Ewall-Wice, N. Fagnoni, R. Fritz, S. Furlanetto, K. Gale-Sides, B. Glendenning, D. Gorthi, B. Greig, J. Grobbelaar, Z. Halday, B. Hazelton, J. Hewitt, J. Hickish, D. Jacobs, A. Julius, N. Kern, J. Kerrigan, P. Kittiwisit, S. Kohn, M. Kolopanis, A. Lanman, P. Plante, Telalo Lekalake, David Lewis, Adrian Liu, D. MacMahon, L. Malan, C. Malgas, M. Maree, Z. Martinot, Eunice Matsetela, A. Mesinger, M. Molewa, M. Morales, Tshegofalang Mosiane, S. Murray, A. Neben, B. Nikolic, C. Nunhokee, A. Parsons, N. Patra, R. Pascua, Samantha Pieterse, J. Pober, N. Razavi-Ghods, J. Ringuette, J. Robnett, K. Rosie, P. Sims, Saurabh Singh, Craig H. Smith, A. Syce, N. Thyagarajan, P. Williams, Haoxuan Zheng   +76 more
semanticscholar   +1 more source

The short ionizing photon mean free path at z=6 in Cosmic Dawn III, a new fully-coupled radiation-hydrodynamical simulation of the Epoch of Reionization [PDF]

Monthly notices of the Royal Astronomical Society, 2022
Recent determinations of the mean free path of ionising photons (mfp) in the intergalactic medium (IGM) at $\rm z=6$ are lower than many theoretical predictions. In order to gain insight, we investigate the evolution of the mfp in our new massive fully
J. Lewis, P. Ocvirk, J. Sorce, Y. Dubois, D. Aubert, Luke Conaboy, P. Shapiro, Taha Dawoodbhoy, R. Teyssier, G. Yepes, S. Gottlober, Y. Rasera, K. Ahn, I. Iliev, Hyunbae Park, 'Emilie Th'elie   +15 more
semanticscholar   +1 more source

The thesan project: ionizing escape fractions of reionization-era galaxies [PDF]

Monthly notices of the Royal Astronomical Society, 2022
A fundamental requirement for reionizing the Universe is that a sufficient fraction of the ionizing photons emitted by galaxies successfully escapes into the intergalactic medium.
Jessica Y.-C. Yeh, Aaron Smith, R. Kannan, E. Garaldi, M. Vogelsberger, Josh Borrow, R. Pakmor, V. Springel, L. Hernquist   +8 more
semanticscholar   +1 more source

Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization [PDF]

, 2021
We introduce the thesan project, a suite of large volume ( 𝐿 box = 95 . 5 cMpc) radiation-magneto-hydrodynamic simulations that simultaneously model the large-scale statistical properties of the intergalactic medium (IGM) during reionization and the ...
R. Kannan, E. Garaldi, A. Smith, R. Pakmor, V. Springel, M. Vogelsberger, L. Hernquist   +6 more
semanticscholar   +1 more source

HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization [PDF]

Astrophysical Journal, 2021
Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment’s first upper limits on the power spectrum of 21 cm fluctuations at z ∼ 8 and 10.
The Hera Collaboration Zara Abdurashidova, J. Aguirre, P. Alexander, Z. Ali, Yanga Balfour, R. Barkana, A. Beardsley, G. Bernardi, T. Billings, J. Bowman, R. Bradley, P. Bull, J. Burba, S. Carey, C. Carilli, Carina Cheng, D. DeBoer, M. Dexter, E. D. L. Acedo, J. Dillon, J. Ely, A. Ewall-Wice, N. Fagnoni, A. Fialkov, R. Fritz, S. Furlanetto, K. Gale-Sides, B. Glendenning, D. Gorthi, B. Greig, J. Grobbelaar, Z. Halday, B. Hazelton, S. Heimersheim, J. Hewitt, J. Hickish, D. Jacobs, A. Julius, N. Kern, J. Kerrigan, P. Kittiwisit, S. Kohn, M. Kolopanis, A. Lanman, P. Plante, Telalo Lekalake, David Lewis, Adrian Liu, Yin-Zhe Ma, D. MacMahon, L. Malan, C. Malgas, M. Maree, Z. Martinot, Eunice Matsetela, A. Mesinger, J. Mirocha, M. Molewa, M. Morales, Tshegofalang Mosiane, Julian B. Muñoz, S. Murray, A. Neben, B. Nikolic, C. Nunhokee, A. Parsons, N. Patra, Samantha Pieterse, J. Pober, Y. Qin, N. Razavi-Ghods, I. Reis, J. Ringuette, J. Robnett, K. Rosie, Mário G. Santos, S. Sikder, P. Sims, Craig H. Smith, A. Syce, N. Thyagarajan, P. Williams, Haoxuan Zheng   +82 more
semanticscholar   +1 more source

The Impact of the First Galaxies on Cosmic Dawn and Reionization [PDF]

, 2021
The formation of the first galaxies during cosmic dawn and reionization (at redshifts z = 5–30), triggered the last major phase transition of our universe, as hydrogen evolved from cold and neutral to hot and ionized.
Julian B. Muñoz, Y. Qin, A. Mesinger, S. Murray, B. Greig, C. Mason   +5 more
semanticscholar   +1 more source

The ASTRID Simulation: Galaxy Formation and Reionization [PDF]

Monthly notices of the Royal Astronomical Society, 2021
We introduce the Astrid simulation, a large-scale cosmological hydrodynamic simulation in a 250 h−1Mpc box with 2 × 55003 particles. Astrid contains a large number of high redshift galaxies, which can be compared to future survey data, and resolves ...
Simeon Bird, Y. Ni, T. Matteo, R. Croft, Yu Feng, Nianyi Chen   +5 more
semanticscholar   +1 more source

Normal, dust-obscured galaxies in the epoch of reionization [PDF]

Nature, 2021
Over the past decades, rest-frame ultraviolet (UV) observations have provided large samples of UV luminous galaxies at redshift (z) greater than 6 (refs. 1–3), during the so-called epoch of reionization.
Y. Fudamoto, P. Oesch, S. Schouws, M. Stefanon, R. Smit, R. Bouwens, R. Bowler, R. Endsley, V. González, H. Inami, I. Labbé, D. Stark, M. Aravena, L. Barrufet, E. da Cunha, P. Dayal, A. Ferrara, L. Graziani, J. Hodge, A. Hutter, Y. Li, I. de Looze, T. Nanayakkara, A. Pallottini, D. Riechers, R. Schneider, G. Ucci, P. P. van der Werf, C. White   +28 more
semanticscholar   +1 more source

The epoch of reionization [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
We have modelled the process of reionization of the IGM by photoionization by galaxies, in order to predict the epoch of reionization. We use a sophisticated semi-analytic model to track the formation of galaxies. Our study represents a much more complete and physically consistent modelling of reionization than has been conducted in the past ...
Benson, A.J., Sugiyama, N., Nusser, A., Lacey, C.G.   +3 more
openaire   +4 more sources