Results 211 to 220 of about 34,994 (298)

Direction-dependent Effects on Global 21 cm Detection

The Astrophysical Journal
Cosmic dawn represents a critical juncture in cosmic history when the first population of stars emerged. The astrophysical processes that govern this transformation need to be better understood.
Yash Agrawal, K. Kavitha, Saurabh Singh
doaj   +1 more source

The photometric variability of massive stars due to gravity waves excited by core convection. [PDF]

Nat Astron, 2023
Anders EH, Lecoanet D, Cantiello M, Burns KJ, Hyatt BA, Kaufman E, Townsend RHD, Brown BP, Vasil GM, Oishi JS, Jermyn AS.   +10 more
europepmc   +1 more source

What Are the Pillars of Reionization? Revising the AGN Luminosity Function at z ∼ 5

The Astrophysical Journal
In the past, high- z active galactic nuclei (AGNs) were given a minor role as possible drivers of reionization, despite initial evidence in favor of their large space densities at low luminosities by Chandra and the Hubble Space Telescope.
Andrea Grazian, Emanuele Giallongo, Konstantina Boutsia, Stefano Cristiani, Fabio Fontanot, Manuela Bischetti, Laura Bisigello, Angela Bongiorno, Giorgio Calderone, Francesco Chiti Tegli, Guido Cupani, Gabriella De Lucia, Valentina D’Odorico, Chiara Feruglio, Fabrizio Fiore, Giovanni Gandolfi, Giorgia Girardi, Francesco Guarneri, Michaela Hirschmann, Matteo Porru, Giulia Rodighiero, Ivano Saccheo, Matteo Simioni, Andrea Trost, Akke Viitanen   +24 more
doaj   +1 more source

Reionization of the Universe by Early-formed Massive Black Holes

, 1996
Shin Sasaki, Masayuki Umemura
openalex   +1 more source

Cosmological reionization around the first stars: Monte Carlo radiative transfer [PDF]

, 2001
B. Ciardi, Andrea Ferrara, S. Marri, Gabriella Raimondo   +3 more
openalex   +1 more source

Beyond Optical Depth: Future Determination of Ionization History from the Cosmic Microwave Background. [PDF]

Astrophys J, 2020
Watts DJ, Addison GE, Bennett CL, Weiland JL.   +3 more
europepmc   +1 more source

Fragile intermediate identification and reactivity elucidation in electrochemical oxidative α-C(sp³)-H functionalization of tertiary amines. [PDF]

Chem Sci, 2023
Liang K, Zhang D, Su Y, Lu L, Hu J, Chen YH, Zhang X, Lei A, Yi H.   +8 more
europepmc   +1 more source

Constraints on the Evolution of the Ionizing Background and Ionizing Photon Mean Free Path at the End of Reionization

The Astrophysical Journal
The variations in Ly α forest opacity observed at z > 5.3 between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field alone.
Frederick B. Davies, Sarah E. I. Bosman, Prakash Gaikwad, Fahad Nasir, Joseph F. Hennawi, George D. Becker, Martin G. Haehnelt, Valentina D’Odorico, Manuela Bischetti, Anna-Christina Eilers, Laura C. Keating, Girish Kulkarni, Samuel Lai, Chiara Mazzucchelli, Yuxiang Qin, Sindhu Satyavolu, Feige Wang, Jinyi Yang, Yongda Zhu   +18 more
doaj   +1 more source

Subaru Telescope -History, active/adaptive optics, instruments, and scientific achievements. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2021
Iye M.
europepmc   +1 more source

Merging Signatures in an Offset Lyman Continuum Emitter at Redshift 3.8

The Astrophysical Journal
Lyman continuum (LyC) emitters at z > 3 provide critical samples for studying the contribution of galaxies to the ionizing background in the epoch of reionization.
Fang-Ting Yuan, Zhen-Ya Zheng, Chunyan Jiang, Shuairu Zhu, Ruqiu Lin, Cheng Cheng   +5 more
doaj   +1 more source