Results 81 to 90 of about 23,934 (219)

Hydrodynamics and Nucleosynthesis of Jet-driven Supernovae. I. Parameter Study of the Dependence on Jet Energetics

The Astrophysical Journal, 2023
Rotating massive stars with initial progenitor masses M _prog ∼ 25–140 M _⊙ can leave rapidly rotating black holes to become collapsars. The black holes and the surrounding accretion disks may develop powerful jets by magnetohydrodynamics instabilities ...
Shing-Chi Leung, Ken’ichi Nomoto, Tomoharu Suzuki   +2 more
doaj   +1 more source

Recent Efforts in Data Compilations for Nuclear Astrophysics

, 2008
Some recent efforts in compiling data for astrophysical purposes are introduced, which were discussed during a JINA-CARINA Collaboration meeting on "Nuclear Physics Data Compilation for Nucleosynthesis Modeling" held at the ECT* in Trento/ Italy from May
Akira Ohnishi, Iris Dillmann, Kiyoshi Kato, Masayuki Y. Fujimoto, null null, Shigeru Kubono, Takaya Nozawa, Takuma Suda, Toshitaka Kajino   +8 more
core   +1 more source

Heavy-element yields and abundances of Asymptotic Giant Branch models with a Small Magellanic Cloud metallicity [PDF]

, 2018
We present new theoretical stellar yields and surface abundances for asymptotic giant branch (AGB) models with a metallicity appropriate for stars in the Small Magellanic Cloud (SMC, $Z= 0.0028$, [Fe/H] $\approx -0.7$).
Carlos, Marília, Cseh, Borbála, García-Hernández, D. A., Kamath, Devika, Karakas, Amanda, Lugaro, Maria   +5 more
core   +2 more sources

MESA and NuGrid simulations of classical novae: CO and ONe nova nucleosynthesis [PDF]

, 2014
Classical novae are the result of thermonuclear flashes of hydrogen accreted by CO or ONe white dwarfs, leading eventually to the dynamic ejection of the surface layers.
Battino, Umberto, Denissenkov, Pavel A., Herwig, Falk, Paxton, B., Pignatari, Marco, Ritter, Christian, Setoodehnia, Kiana, Trappitsch, Reto, Truran, James W.   +8 more
core   +2 more sources

Precise Measurement of Magnesium Isotopes in Fe‐Mg Minerals Using a Multi‐collector SHRIMP Ion Microprobe

Geostandards and Geoanalytical Research, Volume 48, Issue 2, Page 331-343, June 2024.
Key Points Corrected for the Earth's magnetic field, the SHRIMP's IMF depends on the mineral species, not the chemical composition. The IMF arises from the force constant difference between "hard" and "soft" bonds, which is characteristic of each mineral. This permitted the calculation of IMF‐correction factors for most common Mg‐bearing minerals.
Fernando Bea, Pilar Montero, Delia Ortega, José F. Molina, Aitor Cambeses, Leticia Barcos, Shui‐Jiong Wang, Shan Ke   +7 more
wiley   +1 more source

Explosive Nucleosynthesis in Magnetohydrodynamical Jets from Collapsars II. Heavy-Element Nucleosynthesis of s, r, p-Processes

, 2012
We investigate the nucleosynthesis in a massive star of 70 M_solar with solar metallicity in the main sequence stage. The helium core mass after hydrogen burning corresponds to 32 M_solar.
Fujimoto, Shin-ichiro, Hashimoto, Masa-aki, Kotake, Kei, Ono, Masaomi, Yamada, Shoichi   +4 more
core   +1 more source

Constraints on Early Nucleosynthesis from the Abundance Pattern of a Damped Ly-alpha System at z = 2.626 [PDF]

, 2004
We have investigated chemical evolution in the young universe by analysing the detailed chemical enrichment pattern of a metal-rich galaxy at high redshift.
Brad K. Gibson, Carigi L., Gibson B. K., Jason X. Prochaska, Kroupa P., Le Brun V., Matteucci F., Nissen P. E., Schaller G., Thielemann F.-K., Tinsley B. M., Yeshe Fenner   +11 more
core   +1 more source

The bulk mineralogy, elemental composition, and water content of the Winchcombe CM chondrite fall

Meteoritics &Planetary Science, Volume 59, Issue 5, Page 1006-1028, May 2024.
Abstract On the microscale, the Winchcombe CM carbonaceous chondrite contains a number of lithological units with a variety of degrees of aqueous alteration. However, an understanding of the average hydration state is useful when comparing to other meteorites and remote observations of airless bodies.
H. C. Bates, A. J. King, K. S. Shirley, E. Bonsall, C. Schröder, F. Wombacher, T. Fockenberg, R. J. Curtis, N. E. Bowles   +8 more
wiley   +1 more source

The effects of stellar winds of fast-rotating massive stars in the earliest phases of the chemical enrichment of the Galaxy

, 2010
We use the growing data sets of very-metal-poor stars to study the impact of stellar winds of fast rotating massive stars on the chemical enrichment of the early Galaxy.
Beers, C. Chiappini, Cayrel, Cescutti, Charbonnel, Chiappini, Chiappini, Chiappini, Christlieb, Christlieb, Collet, Ekström, Fabbian, François, Frebel, Frebel, Frebel, G. Cescutti, Heger, Hirschi, Israelian, Iwamoto, Lai, Maeder, Masseron, Matteucci, Matteucci, Meynet, Meynet, Nissen, Norris, Pipino, Scalo, Schneider, Spite, Spite, Woosley   +36 more
core   +1 more source

Evolution and Nucleosynthesis of Zero Metal Intermediate Mass Stars [PDF]

, 2001
New stellar models with mass ranging between 4 and 8 Mo, Z=0 and Y=0.23 are presented. The models have been evolved from the pre Main Sequence up to the Asymptotic Giant Branch (AGB).
Alessandro Chieffi, Blocker T., Bonifacio P., Carlberg R. G., Castellani V., Castellani V., de Araujo J. C. N., Eryurt-Ezer D., Ezer D., Groenewegen M. A. T., Groenewegen M. A. T., Groenewegen M. A. T., Herwig F., Herwig F., Hill V., Inma Dominguez, Langer N., Marco Limongi, Molaro P., Molaro P., Mowlavi N., Oscar Straniero, Paczynsky B., Primas F., Silk J., Tornambe A., Weidemann V., Weidemann V.   +27 more
core   +2 more sources