Results 31 to 40 of about 14,115,145 (304)

The First Supernovae: Source Density And Observability Of Pair Instability Supernovae [PDF]

, 2012
Theoretical models predict that some of the first stars ended their lives as extremely energetic Pair Instability Supernovae (PISNe). With energies approaching 10(53) erg, these supernovae are expected to be within the detection limits of the upcoming ...
Milosavljevi, M., Hummel, J. A., Jacob A. Hummel, Bromm, V., Miloš Milosavljević, Volker Bromm, Andreas H. Pawlik, Pawlik, A. H.   +7 more
core   +1 more source

The first stars

Scientific American
To appear in the Encyclopaedia of Astrophysics, Volume 2 (2026), pp.
Glover, Simon C. O., Klessen, Ralf S.
openaire   +3 more sources

The Formation of the First Star in the Universe [PDF]

Science, 2002
We describe results from a fully self-consistent three-dimensional hydrodynamical simulation of the formation of one of the first stars in the Universe. In current models of structure formation, dark matter initially dominates, and pregalactic objects form because of gravitational instability from small initial density perturbations.
Abel, Tom, Bryan, Greg L., Norman, Michael L.   +2 more
openaire   +3 more sources

Lyα visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼ 7

Astronomy & Astrophysics
The resonant scattering nature of Lyα photons interacting with neutral hydrogen makes Lyα emitters (LAEs) robust tracers of the intergalactic neutral hydrogen fraction, and thus sensitive probes of cosmic reionization.
Napolitano L., Pentericci L., Dickinson M., Arrabal Haro P., Taylor A. J., Calabrò A., Bhagwat A., Santini P., Arevalo-Gonzalez F., Begley R., Castellano M., Ciardi B., Donnan C. T., Dottorini D., Dunlop J. S., Finkelstein S. L., Fontana A., Giavalisco M., Hirschmann M., Jung I., Koekemoer A. M., Kokorev V., Llerena M., Lucas R. A., Mascia S., Merlin E., Pérez-González P. G., Stanton T. M., Tripodi R., Wang X., Weiner B. J.   +30 more
doaj   +1 more source

The Giants Stars HE 0107–5240 and HE 0557–4840 and New Searches for Metal‐Poor Stars

, 2008
We report on a new determination of the iron abundance of HE 0107-5240, based on the detection of two Fe II lines in an UV spectrum of the star, which yields [Fe/H]=-5.7.
Bessell, Michael, Norris, John, Keller, Stefan, Christlieb, Norbert, Eriksson, K., Korn, A. J., Zhao, Y H, Zhang, H, Beers, Timothy C, John E. Norris, Norbert Christlieb, Andreas J. Korn, Michael S. Bessell, Yongheng Zhao, Stefan C. Keller, Kjell Eriksson, Haotong Zhang, Timothy C. Beers   +17 more
core   +1 more source

The formation of the first stars and galaxies [PDF]

Nature, 2009
Review article, 27 pages, 5 ...
Bromm, Volker, Yoshida, Naoki, Hernquist, Lars, McKee, Christopher F.   +3 more
openaire   +5 more sources

Detecting the signature of helium reionization through 3HeII 3.46 cm line-intensity mapping

Astronomy & Astrophysics
Context. Helium reionization is the most recent phase change of the intergalactic medium, yet its timing and main drivers remain uncertain. Among the probes to trace to trace how it unfolds, the 3.46 cm hyperfine line of singly ionized helium has opened ...
Spina Benedetta, Porciani Cristiano, Bosman Sarah E. I., Davies Frederick B., Garaldi Enrico, Keenan Ryan P., Schimd Carlo   +6 more
doaj   +1 more source

The First Stars [PDF]

Symposium - International Astronomical Union, 2002
The possible nature of the first generation of stars is considered, using a star of 25M⊙as an example. General nucleosynthesis and the production of CNO catalysts is examined in detail. The increase in neutron excess and its significance for yields from explosive burning is discussed.
openaire   +1 more source

THE MASS SPECTRUM OF THE FIRST STARS [PDF]

The Astrophysical Journal, 2014
18 pages ApJ ...
Hajime Susa, Kenji Hasegawa, Nozomu Tominaga   +2 more
openaire   +2 more sources

The first galactic stars and chemical enrichment in the halo [PDF]

, 2010
Invited Review at IAU Symposium 265 , "Chemical Abundances in the Universe: Connecting First Stars to Planets", K. Cunha, M. Spite & B. Barbuy, eds. Cambridge University Press p.
Bonifacio, Piercarlo
core   +3 more sources