Results 81 to 90 of about 29,336 (265)

Chemical trends in the Galactic halo from APOGEE data [PDF]

, 2016
Indexación: Web of Science; Scopus.The galaxy formation process in the A cold dark matter scenario can be constrained from the analysis of stars in the Milky Way's halo system.
Anders, F, Beers, TC, Carigi, L, Chiappini, C, da Costa, LN, Fernandez-Alvar, E, Fernandez-Trincado, JG, Hayden, MR, Meza, A, Prieto, CA, Queiroz, AB, Santiago, BX, Schultheis, M   +12 more
core   +1 more source

Evolution of asymptotic giant branch stars. I. Updated synthetic TP-AGB models and their basic calibration [PDF]

, 2007
We present new synthetic models of the TP-AGB evolution. They are computed for 7 values of initial metal content (Z from 0.0001 to 0.03) and for initial masses between 0.5 and 5.0 M , thus extending the low- and intermediate-mass tracks of Girardi et al.
P. Marigo, L. V. A. Department, U. Padova, Italy., Astronomical Observatory of Padova, -INAF   +5 more
semanticscholar   +1 more source

Of Biogeography, Fishes and Kelp: Environmental DNA Metabarcoding the Great African Seaforest

Diversity and Distributions, Volume 31, Issue 6, June 2025.
ABSTRACT Aim The biodiversity associated with kelp forest ecosystems is understudied globally, including in South Africa, where kelp forests have expanded their range under climate change. This study used environmental DNA (eDNA) metabarcoding to assess fish biodiversity across an expansive range (~1000 km) of South Africa's kelp forests, contributing ...
Kira‐Lee Courtaillac, Jannes Landschoff, Sophie von der Heyden   +2 more
wiley   +1 more source

Evidence of Third Dredge-up in Post-AGB Stars in Galactic Globular Clusters

The Astrophysical Journal
To better understand the mixing and mass loss experienced by low-mass stars as they ascend the asymptotic giant branch (AGB), I have gathered from the literature the abundances of CNO and s -process elements in post-AGB stars in Galactic globular ...
William V. Dixon
doaj   +1 more source

The stellar spectral features of nearby galaxies in the near infrared: tracers of thermally pulsing asymptotic giant branch stars? [PDF]

, 2015
We analyze the stellar absorption features in high signal-to-noise ratio near-infrared (NIR) spectra of the nuclear region of 12 nearby galaxies, mostly spirals.
R. Riffel, R. Mason, L. Martins, A. Rod'iguez-Ardila, L. Ho, R. Riffel, P. Lira, O. G. Martín, D. Ruschel-Dutra, A. Alonso-Herrero, H. Flohic, R. McDermid, C. R. Almeida, K. Thanjavur, C. Winge   +14 more
semanticscholar   +1 more source

Quantum Batteries: A Materials Science Perspective

Advanced Materials, Volume 37, Issue 17, April 28, 2025.
This perspective is focused on advanced materials that might allow the new device class of quantum batteries to be developed. These systems include microcavities with organic molecules, inorganic nanostructures and perovskites, and superconductor circuits.
Andrea Camposeo, Tersilla Virgili, Floriana Lombardi, Giulio Cerullo, Dario Pisignano, Marco Polini   +5 more
wiley   +1 more source

Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204

The Astronomical Journal
We have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog, Constantine P. Deliyannis, Aaron Steinhauer, Qinghui Sun, Bruce A. Twarog   +4 more
doaj   +1 more source

Nucleosynthesis in low-mass stars: Shedding light on the cosmic origin of heavy elements [PDF]

EPJ Web of Conferences
Low-mass, low-metallicity stars while evolving through the asymptotic giant branch (AGB) phase undergo significant nucleosynthesis producing the majority of slow (s-) and intermedite (i-) neutron capture elements.
Goswami Aruna
doaj   +1 more source

BARIUM ISOTOPIC COMPOSITION OF MAINSTREAM SILICON CARBIDES FROM MURCHISON: CONSTRAINTS FOR s-PROCESS NUCLEOSYNTHESIS IN ASYMPTOTIC GIANT BRANCH STARS [PDF]

, 2014
We present barium, carbon, and silicon isotopic compositions of 38 acid-cleaned presolar SiC grains from Murchison. Comparison with previous data shows that acid washing is highly effective in removing barium contamination.
Nan Liu, M. Savina, A. Davis, R. Gallino, O. Straniero, F. Gyngard, M. Pellin, D. Willingham, N. Dauphas, M. Pignatari, S. Bisterzo, S. Cristallo, F. Herwig   +12 more
semanticscholar   +1 more source

On the Pre‐ and Post‐Positional Semi‐Random Graph Processes

Journal of Graph Theory, Volume 108, Issue 4, Page 819-831, April 2025.
ABSTRACT We study the semi‐random graph process, and a variant process recently suggested by Nick Wormald. We show that these two processes are asymptotically equally fast in constructing a semi‐random graph G $G$ that has property P ${\mathscr{P}}$, for the following examples of P ${\mathscr{P}}$: (1) P ${\mathscr{P}}$ is the set of graphs containing ...
Pu Gao, Hidde Koerts
wiley   +1 more source