Results 1 to 10 of about 1,034,573 (296)

THE FIRST STARS

Acta Polytechnica, 2013
Pop III stars are the key to the character of primeval galaxies, the first heavy elements, the onset of cosmological reionization, and the seeds of supermassive black holes.
Daniel J. Whalen
doaj   +5 more sources

First Stars XIV. Sulfur abundances in extremely metal-poor (EMP) stars [PDF]

Astronomy & Astrophysics, 2010
Sulfur is important: the site of its formation is uncertain, and at very low metallicity the trend of [S/Fe] against [Fe/H] is controversial. Below [Fe/H]=-2.0, [S/Fe] remains constant or it decreases with [Fe/H], depending on the author and the ...
Alonso, Andrievsky, Andrievsky, Andrievsky, Andrievsky, B. Barbuy, B. Nordström, B. Plez, Ballester, Bonifacio, Bonifacio, Caffau, Caffau, Caffau, Caffau, Castelli, Cayrel, Centurión, Depagne, Dessauges-Zavadsky, Dessauges-Zavadsky, Dessauges-Zavadsky, E. Caffau, E. Depagne, Ellison, F. Primas, F. Spite, François, François, Frebel, Frebel, Gehren, H.-G. Ludwig, Heger, Hill, Israelian, J. Andersen, Kobayashi, Korotin, Korotin, Korotin, Korotin, Kurucz, Ledoux, Ledoux, Lodders, Lopez, Lopez, M. Spite, McWilliam, Molaro, Nakamura, Nissen, Nissen, Norris, Noterdaeme, P. Bonifacio, P. François, P. Molaro, Pettini, Pettini, Prochaska, R. Cayrel, Ramaty, Ryde, Ryde, S. A. Korotin, S. M. Andrievsky, Shigeyama, Srianand, T. C. Beers, Takada-Hidai, Takeda, V. Hill, Venn, Woosley, Zhang   +76 more
core   +13 more sources

The First Stars

Annual Review of Astronomy and Astrophysics, 2003
We review recent theoretical results on the formation of the first stars in the universe, and emphasize related open questions. In particular, we discuss the initial conditions for Population III star formation, as given by variants of the cold dark ...
Balsara D, Bate MR, Cayrel R, Cooray A, Galli D, McDowell MRC, Motte F, Ober WW, Puy D, Rees MJ, Schneider R, Schwarzschild M, Sokasian A, Whalen D, Yoneyama T, Yoshii Y   +15 more
core   +4 more sources

First stars [PDF]

Astronomy & Astrophysics, 2013
Detailed abundances of the elements produced by r-process nucleosynthesis in various circumstances are our best observational clues to their origin, since the site(s) of r-element production is(are) still not known with certainty. A small fraction of extremely metal-poor (EMP) stars exhibit excesses of heavy neutron-capture elements produced in the r ...
Siquerira Mello Jr., C., Spite, M., Barbuy, B., Spite, F., Caffau, E., Hill, V., Wanajo, S., Primas, F., Plez, B., Cayrel, R., Nordström, Birgitta, Andersen, Johannes, Sneden, C., Beers, T.C., Bonifacio, P., Francois, P., Molaro, P.   +16 more
openaire   +3 more sources

Star Formation Under Cosmological Conditions [PDF]

EPJ Web of Conferences, 2020
The first stars have transformed the universe from the infrared background to the light. Thereby, this so called “dark age” ended by re-ionization through the ultraviolet light of the first stars.
El Eid Mounib F., Saad Cynthia
doaj   +1 more source

First stars [PDF]

Astronomy & Astrophysics, 2011
Pages: 11 (+ 6 online material), Figures: 14, Tables: 4 (+ 2 online material)
Hansen, C. J., Nordström, B., Bonifacio, P., Spite, M., Andersen, J., Beers, T. C., Cayrel, R., Spite, F., Molaro, P., Barbuy, B., Depagne, E., François, P., Hill, V., Plez, Bertrand, Sivarani, T.   +14 more
openaire   +4 more sources

Machine Learning Detects Multiplicity of the First Stars in Stellar Archaeology Data

The Astrophysical Journal, 2023
In unveiling the nature of the first stars, the main astronomical clue is the elemental compositions of the second generation of stars, observed as extremely metal-poor (EMP) stars, in the Milky Way.
Tilman Hartwig, Miho N. Ishigaki, Chiaki Kobayashi, Nozomu Tominaga, Ken’ichi Nomoto   +4 more
doaj   +1 more source

The First Stars: Final Remarks [PDF]

, 1999
How did star formation begin in the universe? Some of the questions addressed at this first meeting on "The First Stars" are summarized here from a theoretical perspective, and some brief comments are made on what we may have learned so far.Comment: 5 ...
Larson, Richard B.
core   +2 more sources

The First Stars [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractThe formation of the first generations of stars at redshifts z ≥ 15 − 20 signaled the transition from the simple initial state of the universe to one of ever increasing complexity. We here review recent progress in understanding the assembly process of the first galaxies, starting with cosmological initial conditions and modelling the detailed ...
Johnson, Jarrett L., Greif, Thomas H., Bromm, Volker   +2 more
openaire   +2 more sources

Evidence of First Stars-enriched Gas in High-redshift Absorbers

The Astrophysical Journal, 2023
The first stars were born from chemically pristine gas. They were likely massive, and thus they rapidly exploded as supernovae, enriching the surrounding gas with the first heavy elements.
Andrea Saccardi, Stefania Salvadori, Valentina D’Odorico, Guido Cupani, Michele Fumagalli, Trystyn A. M. Berg, George D. Becker, Sara Ellison, Sebastian Lopez   +8 more
doaj   +1 more source