Results 41 to 50 of about 9,884 (228)

CHEMICAL COMPOSITION OF ATMOSPHERES OF COOL GIANT STARS

open access: yesOdessa Astronomical Publications, 2017
Results of determination of abundances of chemical elements in the atmospheres of 57 giant stars of the oxygen sequence of the Galactic disk axe given.
N. S. Komarov
doaj   +1 more source

Do meteoritic silicon carbide grains originate from asymptotic giant branch stars of super-solar metallicity? [PDF]

open access: yes, 2018
We compare literature data for the isotopic ratios of Zr, Sr, and Ba from analysis of single meteoritic stardust silicon carbide (SiC) grains to new predictions for the slow neutron-capture process (the s process) in metal-rich asymptotic giant branch ...
M. Lugaro   +5 more
semanticscholar   +1 more source

STARDUST FROM ASYMPTOTIC GIANT BRANCH STARS

open access: yesThe Astrophysical Journal, 2009
The formation of dust in the outflows of low- and intermediate-mass stars on the first giant branch and asymptotic giant branch (AGB) is studied and the relative contributions of stars of different initial masses and metallicities to the interstellar medium (ISM) at the instant of solar system formation are derived.
Gail, H.   +3 more
openaire   +2 more sources

EVOLUTION, NUCLEOSYNTHESIS, AND YIELDS OF LOW-MASS ASYMPTOTIC GIANT BRANCH STARS AT DIFFERENT METALLICITIES [PDF]

open access: yes, 2009
The envelope of thermally pulsing asymptotic giant branch (TP-AGB) stars undergoing periodic third dredge-up (TDU) episodes is enriched in both light and heavy elements, the ashes of a complex internal nucleosynthesis involving p, α, and n captures over ...
S. Cristallo   +8 more
semanticscholar   +1 more source

The Search for Binaries in Post-Asymptotic Giant Branch Stars: Do Binary Companions Shape the Nebulae? [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2012
Binary companions are often invoked to explain the axial and point symmetry seen in the majority of planetary nebulae and proto-planetary nebulae (PPNs).
Bruce J. Hrivnak
doaj   +1 more source

A Catalog of GALEX Ultraviolet Emission from Asymptotic Giant Branch Stars [PDF]

open access: yes, 2017
We have performed a comprehensive study of the UV emission detected from asymptotic giant branch (AGB) stars by the Galaxy Evolution Explorer (GALEX). Of the 468 AGB stars in our sample, 316 were observed by GALEX.
R. Montez   +4 more
semanticscholar   +1 more source

Asymptotic giant branch stars as astroparticle laboratories [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1999
8 pages, 3 tables, 8 figures, accepted for publication in ...
Dominguez, Inma   +2 more
openaire   +2 more sources

EVOLUTION OF THERMALLY PULSING ASYMPTOTIC GIANT BRANCH STARS. V. CONSTRAINING THE MASS LOSS AND LIFETIMES OF INTERMEDIATE-MASS, LOW-METALLICITY AGB STARS [PDF]

open access: yes, 2016
Thermally pulsing asymptotic giant branch (TP-AGB) stars are relatively short lived (less than a few Myr), yet their cool effective temperatures, high luminosities, efficient mass loss, and dust production can dramatically affect the chemical enrichment ...
P. Rosenfield   +6 more
semanticscholar   +1 more source

Planetary Engulfment Prognosis within the ρ CrB System

open access: yesThe Astrophysical Journal, 2023
Exoplanets have been detected around stars at various stages of their lives, ranging from young stars emerging from formation to the latter stages of evolution, including white dwarfs and neutron stars.
Stephen R. Kane
doaj   +1 more source

Evolution of the Outflow in the Water Fountain Source IRAS 18043–2116

open access: yesThe Astrophysical Journal, 2023
We present the spectral and spatial evolution of H _2 O masers associated with the water fountain source IRAS 18043−2116, found in observations with the Nobeyama 45 m Telescope and the Australia Telescope Compact Array. We have found new highest-velocity
L. Uscanga   +7 more
doaj   +1 more source

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