Results 1 to 10 of about 215 (139)
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
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Universe, 2021 Lead (Pb) is predicted to have large over-abundances with respect to other s-process elements in Asymptotic Giant Branch (AGB) stars, especially of low metallicities.
Devika Kamath, Hans Van Winckel
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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 +7 more
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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
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A Study of the Dusty Disks and Shells around Post-RGB Stars in the LMC
Galaxies, 2022 A new class of dusty post-Red Giant Branch (post-RGB) stars has recently been identified in the Magellanic Clouds. Their spectral energy distributions (SEDs) suggest that their mass-ejecta are similar to dusty post-Asymptotic Giant Branch (post-AGB ...
Geetanjali Sarkar, Raghvendra Sahai
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Properties of the Variation of the Infrared Emission of OH/IR Stars III. The M Band Light Curves [PDF]
Journal of Astronomy and Space Sciences, 2010 To study properties of the pulsation in the infrared emission for long period variables, we have collected and analyzed the infrared observational data at M band for 12 OH/IR stars.
Young-Joo Kwon, Kyung-Won Suh
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Planetary Engulfment Prognosis within the ρ CrB System
The 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
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Universe, 2022 The foundations of stellar nucleosynthesis have been established more than 70 years ago. Since then, much progress has been made, both on the theoretical side, with stellar evolution and nucleosynthesis models of increasing complexity, using more and ...
Sophie Van Eck +2 more
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AC Her: Evidence of the First Polar Circumbinary Planet
The Astrophysical Journal Letters, 2023 We examine the geometry of the post–asymptotic giant branch (AGB) star binary AC Her and its circumbinary disk. We show that the observations describe a binary orbit that is perpendicular to the disk with an angular momentum vector that is within 9° of ...
Rebecca G. Martin +4 more
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Preliminary results for the 19F(ρ,α)16O reaction cross section measured at INFN-LNS [PDF]
EPJ Web of Conferences, 2020 The 19F(ρ,α)16O reaction is an important fluorine destruction chan- nel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis.
Petruse T +26 more
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