Results 141 to 150 of about 22,853 (217)

Testing general relativity with cosmological large scale structure. [PDF]

Gen Relativ Gravit, 2022
Durrer R.
europepmc   +1 more source

Probing Power Spectrum Enhancement at Small Scales with the SKA

The Astrophysical Journal
The reionization process is driven by ionizing photons from dwarf galaxies in halos with virial temperatures T _vir  ≳ 10 ^4 K, whereas minihalos whose T _vir  ≲ 10 ^4 K consume ionizing photons and have negative contributions to reionization.
Hourui Zhu, Bin Yue, Yidong Xu, Xuelei Chen, Zhiqi Huang   +4 more
doaj   +1 more source

The galaxy-IGM connection in THESAN: the physics connecting the IGM Lyman-$α$ opacity and galaxy density in the reionization epoch

The Open Journal of Astrophysics
The relation between the Lyman-$\alpha$ effective optical depth of quasar sightlines ($\tau_\mathrm{los}$) and the distribution of galaxies around them is an emerging probe of the connection between the first collapsed structures and the IGM properties ...
Enrico Garaldi, Verena Bellscheidt, Aaron Smith, Rahul Kannan   +3 more
doaj   +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

Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities. [PDF]

Exp Astron (Dordr), 2021
Rosati P, Basa S, Blain AW, Bozzo E, Branchesi M, Christensen L, Ferrara A, Gomboc A, O'Brien PT, Osborne JP, Rossi A, Schüssler F, Spurio M, Stergioulas N, Stratta G, Amati L, Casewell S, Ciolfi R, Ghirlanda G, Grimm S, Guetta D, Harms J, Le Floc'h E, Longo F, Maggiore M, Mereghetti S, Oganesyan G, Salvaterra R, Tanvir NR, Turriziani S, Vergani SD, Balman S, Caruana J, Erkut MH, Guidorzi G, Frontera F, Martin-Carrillo A, Paltani S, Porquet D, Sergijenko O.   +39 more
europepmc   +1 more source

Lyα Emission at z = 7–13: Clear Evolution of Lyα Equivalent Width Indicating a Late Cosmic Reionization History

The Astrophysical Journal
We present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed Time ...
Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Hiroya Umeda, Yuki Isobe, Yechi Zhang, Yi Xu   +8 more
doaj   +1 more source

On the contribution of dwarf galaxies to reionization of the Universe

The Open Journal of Astrophysics
We present estimates of the ultraviolet (UV) and Lyman continuum flux density contributed by galaxies of luminosities from $M_{\rm UV}\approx -25$ to $M_{\rm UV}=-4$ at redshifts $5\leq z\leq 10$ using a galaxy formation model that reproduces properties ...
Zewei Wu, Andrey Kravtsov
doaj   +1 more source

A New Approach for Constraining Large-scale Temperature Fluctuations in the Intergalactic Medium

The Astrophysical Journal
The reionization of helium is thought to occur at 2.5 ≲ z ≲ 4, marking the last phase transition and final global heating event of the intergalactic medium (IGM).
Saba Etezad-Razavi, Sarah E. I. Bosman, Frederick B. Davies   +2 more
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

The emergence of globular clusters and globular-cluster-like dwarfs. [PDF]

Nature
Taylor ED, Read JI, Orkney MDA, Kim SY, Pontzen A, Agertz O, Rey MP, Andersson EP, Collins MLM, Yates RM.   +9 more
europepmc   +1 more source