Results 1 to 10 of about 26,787 (255)
Backflow in Post-Asymptotic Giant Branch Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 We derive the conditions for a backflow toward the central star(s) of circumstellar material to occur during the post-asymptotic giant branch (AGB) phase. The backflowing material may be accreted by the post-AGB star and/or its companion, if such exists.
Soker, Noam
core +6 more sources
Isotopic Enrichment of Planetary Systems from Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal Letters, 2023 Short-lived radioisotopes, in particular ^26 Al and ^60 Fe, are thought to contribute to the internal heating of the Earth, but are significantly more abundant in the solar system compared to the interstellar medium.
Richard J. Parker, Christina Schoettler
doaj +2 more sources
An HI Imaging Survey of Asymptotic Giant Branch Stars [PDF]
, 2013 We present an imaging study of a sample of eight asymptotic giant branch (AGB) stars in the HI 21-cm line. Using observations from the Very Large Array, we have unambiguously detected HI emission associated with the extended circumstellar envelopes of ...
Bertre, T. Le +3 more
core +5 more sources
Extremely Metal-Poor Asymptotic Giant Branch Stars [PDF]
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 +2 more
doaj +4 more sources
Crystallinity versus mass-loss rate in Asymptotic Giant Branch stars [PDF]
, 2001 Infrared Space Observatory (ISO) observations have shown that O-rich Asymptotic Giant Branch (AGB) stars exhibit crystalline silicate features in their spectra only if their mass-loss rate is higher than a certain threshold value.
de Koter, A. +3 more
core +5 more sources
The effects of thermohaline mixing on low-metallicity asymptotic giant branch stars [PDF]
, 2009 We examine the effects of thermohaline mixing on the composition of the envelopes of low-metallicity asymptotic giant branch (AGB) stars. We have evolved models of 1, 1.5 and 2 solar masses from the pre-main sequence to the end of the thermally pulsing ...
Abia +50 more
core +2 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 +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 +7 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
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
doaj +1 more source