Results 1 to 10 of about 995 (179)

ASYMPTOTIC GIANT BRANCH VARIABLES

Odessa Astronomical Publications, 2017
Asymptotic Giant Branch variable are the brightest and most distinctive individual stars to be found in the resolved, old and inter mediate age, stellar populations of galaxies in the Local Group and beyond.
P. A. Whitelock
doaj   +3 more sources

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   +3 more sources

Asymptotic Giant Branch Stars and presolar grains [PDF]

EPJ Web of Conferences, 2020
Starting from the recognition that radioactive isotopes were present alive in the Early Solar System, inducing composition anomalies from their decay, and through the discovery that other important anomalies affected also stable species, we shall discuss
Busso Maurizio, Palmerini Sara, Vescovi Diego   +2 more
doaj   +1 more source

Post-AGB Stars as Tracers of AGB Nucleosynthesis: An Update

Universe, 2022
The chemical evolution of galaxies is governed by the chemical yields from stars, and here we focus on the important contributions from asymptotic giant branch (AGB) stars. AGB nucleosynthesis is, however, still riddled with complexities.
Devika Kamath, Hans Van Winckel
doaj   +1 more source

Extremely Metal-Poor Asymptotic Giant Branch Stars

Universe, 2022
Little is known about the first stars, but hints on this stellar population can be derived from the peculiar chemical composition of the most metal-poor objects in the Milky Way and in resolved stellar populations of nearby galaxies.
Mario Cirillo, Luciano Piersanti, Oscar Straniero   +2 more
doaj   +1 more source

Multi-line diagnostics of the axi-symmetric wind around the MS-type AGB star RS Cancri [PDF]

EPJ Web of Conferences, 2022
We present data recently obtained with NOEMA/PolyFiX on the MS-type Asymptotic Giant Branch (AGB) star RS Cnc, allowing to characterize in detail the structure of its wind.
Winters Jan Martin, Le Bertre Thibaut, Hoai Do Thi, Wong Ka Tat, Nhung Pham Tuyet, Lesaffre Pierre, Kim Wonju, Darriulat Pierre   +7 more
doaj   +1 more source

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

The 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, H. Imai, J. F. Gómez, D. Tafoya, G. Orosz, T. P. McCarthy, Y. Hamae, K. Amada   +7 more
doaj   +1 more source

CHEMICAL COMPOSITION OF ATMOSPHERES OF COOL GIANT STARS

Odessa 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

Studying Asymptotic Giant Branch Stars in the JWST Era

Universe, 2020
We explore the potential offered by the incoming launch of the James Webb Space Telescope, to study the stars evolving through the asymptotic giant branch (AGB) phase. To this aim we compare data of AGB stars in the Large Magellanic Cloud, taken with the
Paolo Ventura, Ester Marini, Silvia Tosi, Flavia Dell’Agli   +3 more
doaj   +1 more source

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

Journal 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