Results 171 to 180 of about 34,994 (298)

Cosmic Microwave Background Polarization and reionization: constraining models with a double reionization

, 2004
Neutral hydrogen around high-z QSO and an optical depth tau ~ 0.17 can be reconciled if reionization is more complex than a single transition at z ~ 6-8. Tracing its details could shed a new light on the first sources of radiation.
Becker, Bennett, Bernardi, Bruscoli, Cen, Ciardi, Colombo, Cortiglioni, Djorgovski, E. Carretti, G. Bernardi, Haiman, Hansen, Holder, Hu, Kaplinghat, Kogut, L. Casarini, L. P. L. Colombo, Madau, Miralda-Escudè, Naselsky, Ng, R. Fabbri, R. Mainini, Ricotti, Ricotti, S. A. Bonometto, Seljak, Sokasian, Wyithe, Zaldarriaga, Zaldarriaga   +32 more
core   +1 more source

Reionization of the Milky Way, M31, and their satellites – I. Reionization history and star formation [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
14 pages, 12 figures, 2 tables.
Stefan Gottlöber, Noam I. Libeskind, Keri L. Dixon, Keri L. Dixon, Alexander Knebe, Alexander Knebe, Ilian T. Iliev, Yehuda Hoffman, Gustavo Yepes, Gustavo Yepes   +9 more
openaire   +4 more sources

The First Galaxies and the Likely Discovery of Their Fossils in the Local Group

Advances in Astronomy, 2010
The lower bound for the mass of a galaxy is unknown, as are the typical luminosity of the smallest galaxies and their numbers. The answers depend on the extent to which star formation in the first population of small mass halos may be suppressed by ...
Massimo Ricotti
doaj   +1 more source

Early Results from GLASS-JWST. XXIII. The Transmission of Lyα from UV-faint z ∼ 3–6 Galaxies

The Astrophysical Journal, 2023
Ly α emission from galaxies can be used to trace neutral hydrogen in the epoch of reionization, however, there is a degeneracy between the attenuation of Ly α in the intergalactic medium (IGM) and the line profile emitted by the galaxy.
Gonzalo Prieto-Lyon, Charlotte Mason, Sara Mascia, Emiliano Merlin, Namrata Roy, Alaina Henry, Guido Roberts-Borsani, Takahiro Morishita, Xin Wang, Kit Boyett, Patricia Bolan, Marusa Bradac, Marco Castellano, Amata Mercurio, Themiya Nanayakkara, Diego Paris, Laura Pentericci, Claudia Scarlata, Michele Trenti, Tommaso Treu, Eros Vanzella   +20 more
doaj   +1 more source

A blazar in the epoch of reionization

Nature Astronomy
Abstract Relativistic jets are thought to play a crucial role in the formation and evolution of massive galaxies and supermassive black holes. Blazars, which are quasars with jets aligned along our line of sight, provide insights into the jetted population and have been observed up to redshifts of z = 6.1.
Eduardo Bañados, Emmanuel Momjian, Thomas Connor, Silvia Belladitta, Roberto Decarli, Chiara Mazzucchelli, Bram P. Venemans, Fabian Walter, Feige Wang, Zhang-Liang Xie, Aaron J. Barth, Anna-Christina Eilers, Xiaohui Fan, Yana Khusanova, Jan-Torge Schindler, Daniel Stern, Jinyi Yang, Irham Taufik Andika, Christopher L. Carilli, Emanuele P. Farina, Andrew Fabian, Joseph F. Hennawi, Antonio Pensabene, Sofía Rojas-Ruiz   +23 more
openaire   +3 more sources

Behavior of the Lyα Damping Wings as a Function of Reionization Topology

The Astrophysical Journal
The damping wing signatures in high-redshift quasars have proven instrumental in studying the epoch of reionization. With the upcoming Euclid mission set to discover many more quasars, it is crucial to explore what this new set of quasars might reveal ...
Yash M. Sharma, Frederick B. Davies, Prakash Gaikwad, Fahad Nasir, Sarah E. I. Bosman   +4 more
doaj   +1 more source

CONCERTO: Instrument and status [PDF]

EPJ Web of Conferences
CONCERTO (CarbON CII line in post-rEionization and ReionizaTiOn) is a low-resolution Fourier transform spectrometer dedicated to the study of star-forming galaxies and clusters of galaxies in the transparent millimeter windows from the ground.
Fasano Alessandro, Ade Peter, Aravena Manuel, Barria Emilio, Beelen Alexandre, Benoît Alain, Béthermin Matthieu, Bounmy Julien, Bourrion Olivier, Bres Guillaume, Calvo Martino, Catalano Andrea, De Breuck Carlos, Désert François-Xavier, Durán Carlos, Fenouillet Thomas, Garcia Jose, Garde Gregory, Goupy Johannes, Groppi Christopher, Hoarau Christophe, Hu Wenkai, Lagache Guilaine, Lambert Jean-Charles, Leggeri Jean-Paul, Levy-Bertrand Florence, Lundgren Andreas, Macías-Pérez Juan, Mani Hamdi, Marpaud Julien, Mauskopf Philip, Monfardini Alessandro, Pisano Giampaolo, Ponthieu Nicolas, Prieur Leo, Roni Samuel, Roudier Sebastien, Tourres Damien, Tucker Carol   +38 more
doaj   +1 more source

Analytical Models of the Intergalactic Medium and Reionization [PDF]

Curr.Sci.97:841,2009, 2009
Reionization is a process whereby hydrogen (and helium) in the Universe is ionized by the radiation from first luminous sources. Theoretically, the importance of the reionization lies in its close coupling with the formation of first cosmic structures and hence there is considerable effort in modelling the process.
arxiv  

Reionization on ice

, 2006
The case for substantial far infrared ice emission in local ultraluminous infrared galaxies, expected based on the presence of mid-infrared ice absorption in their spectra and the known far infrared optical properties of ice, is still largely unsupported by direct observation owing to insufficient far infrared spectral coverage.
Dudley, C. C., Imanishi, M., Maloney, P. R.   +2 more
openaire   +2 more sources

Do Minihalos Affect Cosmic Reionization?

The Astrophysical Journal
The role of unresolved structures (“minihalos”) in determining the consumption of ionizing photons during cosmic reionization remains an unsolved problem in modeling cosmic reionization, despite recent extensive studies with small-box high-resolution ...
Nickolay Y. Gnedin
doaj   +1 more source