Results 121 to 130 of about 21,784 (251)

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

FLUORINE ABUNDANCES IN GALACTIC ASYMPTOTIC GIANT BRANCH STARS

The Astrophysical Journal, 2010
An analysis of the fluorine abundance in Galactic asymptotic giant branch (AGB) carbon stars (24 N-type, 5 SC-type, and 5 J-type) is presented. This study uses the state-of-the-art carbon-rich atmosphere models and improved atomic and molecular line lists in the 2.3 μm region.
Abia C., Cunha K., Cristallo S., de Laverny P., Domínguez I., Eriksson K., Gialanella L., Hinkle K., IMBRIANI, GIANLUCA, Recio Blanco A., Smith V. V., Stranier, O., Wahlin R.   +12 more
openaire   +4 more sources

White dwarf planets

EPJ Web of Conferences, 2013
The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage ...
Bonsor Amy, Veras Dimitri, Villaver Eva, Mustill Alexander J., Wyatt Mark C.   +4 more
doaj   +1 more source

Synthesis of Organic and Inorganic Compounds in Asymptotic Giant Branch Stars

Galaxies
After the synthesis of carbon in the core of asymptotic giant branch (AGB) stars, carbon is dredged up to the surface by convection. Many carbon-based molecules are formed in the subsequently developed stellar wind.
Sun Kwok
doaj   +1 more source

Introduction to Asymptotic Giant Branch Stars

Journal of Physics: Conference Series, 2016
A brief introduction on the main characteristics of the asymptotic giant branch stars (briefly: AGB) is presented. We describe a link to observations and outline basic features of theoretical modeling of these important evolutionary phases of stars. The most important aspects of the AGB stars is not only because they are the progenitors of white dwarfs,
openaire   +2 more sources

Obscured Asymptotic Giant Branch stars in the Magellanic Clouds [PDF]

Symposium - International Astronomical Union, 1999
We report on some recent advances in the study and understanding of heavily obscured AGB stars in the Magellanic Clouds.
openaire   +5 more sources

Stellar Evolution and Mass Loss on the Asymptotic Giant Branch [PDF]

Astrophysics and Space Science, 1995
latex, 10pages, 3 figures available on request from azijlstr@eso ...
openaire   +3 more sources

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

Phosphorus-bearing molecules PO and PN at the edge of the Galaxy. [PDF]

Nature, 2023
Koelemay LA, Gold KR, Ziurys LM.
europepmc   +1 more source