Results 51 to 60 of about 173,669 (191)

Stellar Evolution and Convection in 3D Hydrodynamic Simulations of a Complete Burning Phase

Galaxies
Our understanding of stellar evolution and nucleosynthesis is limited by the uncertainties coming from the complex multi-dimensional processes in stellar interiors, such as convection and nuclear burning. Three-dimensional stellar models can improve this
Federico Rizzuti, Raphael Hirschi, Vishnu Varma, William David Arnett, Cyril Georgy, Casey Meakin, Miroslav Mocák, Alexander StJ. Murphy, Thomas Rauscher   +8 more
doaj   +1 more source

H ingestion into He-burning convection zones in super-AGB stellar models as a potential site for intermediate neutron-density nucleosynthesis [PDF]

, 2015
We investigate the evolution of super-AGB (SAGB) thermal pulse (TP) stars for a range of metallicities (Z) and explore the effect of convective boundary mixing (CBM).
S. Jones, S. Jones, C. Ritter, C. Ritter, F. Herwig, F. Herwig, Chris L. Fryer, M. Pignatari, M. Bertolli, M. Bertolli, B. Paxton   +10 more
semanticscholar   +1 more source

Improved astrophysical rate for the 18O(p,α)15N reaction by underground measurements

Physics Letters B, 2019
The 18O(p,α)15N reaction affects the synthesis of 15N, 18O and 19F isotopes, whose abundances can be used to probe the nucleosynthesis and mixing processes occurring deep inside asymptotic giant branch (AGB) stars.
C.G. Bruno, M. Aliotta, P. Descouvemont, A. Best, T. Davinson, D. Bemmerer, A. Boeltzig, C. Broggini, A. Caciolli, F. Cavanna, T. Chillery, G.F. Ciani, P. Corvisiero, R. Depalo, A. Di Leva, Z. Elekes, F. Ferraro, A. Formicola, Zs. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, Gy. Gyürky, G. Imbriani, M. Junker, M. Lugaro, P. Marigo, R. Menegazzo, V. Mossa, F.R. Pantaleo, D. Piatti, P. Prati, K. Stöckel, O. Straniero, F. Strieder, T. Szücs, M.P. Takács, D. Trezzi   +37 more
doaj   +1 more source

Application of Laboratory Atomic Physics to Some Significant Stellar Chemical Composition Questions

Atoms, 2018
This brief review highlights some current issues in Galactic stellar nucleosynthesis, and some recent laboratory studies by the Wisconsin atomic physics group that have direct application to stellar spectroscopy to advance our understanding of the ...
Christopher Sneden, James E. Lawler, Michael P. Wood   +2 more
doaj   +1 more source

Nuclear burning in a compact scheme of inertial electrostatic confinement as imitation of stellar nucleosynthesis. Experiment and PIC modeling

, 2015
DD neutrons from microfusion in the interelectrode space of a table-top low energy nanosecond vacuum discharge with a deuterium-loaded Pd anode have been demonstrated earlier.
Y. Kurilenkov, V. Tarakanov, V. Karpukhin, S. Gus’kov, A. V. Oginov   +4 more
semanticscholar   +1 more source

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): BINARIES, PULSATIONS, AND EXPLOSIONS [PDF]

, 2015
We substantially update the capabilities of the open-source software instrument Modules for Experiments in Stellar Astrophysics (MESA). MESA can now simultaneously evolve an interacting pair of differentially rotating stars undergoing transfer and loss ...
B. Paxton, P. Marchant, J. Schwab, E. Bauer, L. Bildsten, L. Bildsten, M. Cantiello, L. Dessart, R. Farmer, H. Hu, N. Langer, R. Townsend, D. Townsley, F. Timmes   +13 more
semanticscholar   +1 more source

Underground Measurements of Nuclear Reaction Cross-Sections Relevant to AGB Stars

Universe, 2021
Nuclear reaction cross sections are essential ingredients to predict the evolution of AGB stars and understand their impact on the chemical evolution of our Galaxy.
Chemseddine Ananna, Francesco Barile, Axel Boeltzig, Carlo Giulio Bruno, Francesca Cavanna, Giovanni Francesco Ciani, Alessandro Compagnucci, Laszlo Csedreki, Rosanna Depalo, Federico Ferraro, Eliana Masha, Denise Piatti, David Rapagnani, Jakub Skowronski   +13 more
doaj   +1 more source

Can We Draw Conclusions on Supernova Shock Wave Propagation Using Short‐Lived Radioactive Isotopes?

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT We run a three‐dimensional Galactic chemical evolution (GCE) model to follow the propagation of 53Mn (exclusively produced from type Ia supernovae, SNIa), 60Fe (exclusively produced from core‐collapse supernovae, CCSNe), 182Hf (exclusively produced from intermediate mass stars, IMSs), and 244Pu (exclusively produced from neutron star mergers ...
Benjamin Wehmeyer, Andrés Yagüe López, Benoit Côté, Maria K. Petö, Chiaki Kobayashi, Maria Lugaro   +5 more
wiley   +1 more source

STELLAR NUCLEOSYNTHESIS IN THE HYADES OPEN CLUSTER [PDF]

, 2009
We report a comprehensive light-element (Li, C, N, O, Na, Mg, and Al) abundance analysis of three solar-type main sequence (MS) dwarfs and three red giant branch (RGB) clump stars in the Hyades open cluster using high-resolution and high signal-to-noise ...
S. Schuler, J. King, L. The
semanticscholar   +1 more source

Methyltransferase‐Like 3‐Mediated N6‐Methyladenosine Modification on RNAs: A Novel Perspective for the Pathogenesis and Treatment of Bone Diseases

Journal of Cellular and Molecular Medicine, Volume 29, Issue 5, March 2025.
ABSTRACT Osteoarthritis, osteoporosis, and osteosarcoma are prevalent osseous pathologies associated with the aberrant functionality of chondrocytes, osteoclasts, and osteoblasts, respectively. These conditions frequently exhibit therapeutic resistance and possess a high mortality risk, thus representing substantial health threats.
Dongqiong Xiao, Deshuang Zhang, Yi Qu, Xiaojuan Su   +3 more
wiley   +1 more source