Results 61 to 70 of about 26,787 (255)
Pulsating post-asymptotic giant branch stars [PDF]
Numerical stability analyses of envelopes of post-asymptotic giant branch stars show instabilities towards radial pulsations over a broad range of effective temperatures, although only stars with sufficiently high luminosity-to-mass ratios and high enough iron abundances are excited.
openaire +1 more source
Goos–Hänchen effect singularities in transdimensional plasmonic films
Abstract We identify and classify topologically protected singularities for the reflection coefficient of transdimensional plasmonic systems. Originating from nonlocal electromagnetic response due to vertical electron confinement in the system, such singularities lead to lateral (angular) Goos–Hänchen shifts on the millimeter (milliradian) scale in the
Svend‐Age Biehs, Igor V. Bondarev
wiley +1 more source
The Formation of Crystalline Dust in AGB Winds from Binary Induced Spiral Shocks
As stars evolve along the Asymptotic Giant Branch, strong winds are driven from the outer envelope. These winds form a shell, which may ultimately become a planetary nebula.
Adam Frank +10 more
core +1 more source
Detailed AGB evolutionary models and near infrared colours of intermediate-age stellar populations: Tests on star clusters [PDF]
We investigate the influence of Asymptotic Giant Branch stars on integrated colours of star clusters of ages between ~100 Myr and a few gigayears, and composition typical for the Magellanic Clouds.
Cassara', L. +4 more
core +1 more source
ABSTRACT For data‐limited fish species, sustainable management frequently relies on biological metrics that are derived from life‐history trait data, as opposed to high‐resolution time series of catch and abundance. These biological metrics are used to assess a species' recovery potential at low population densities, as well as their extinction risk ...
Catharine Horswill +7 more
wiley +1 more source
Evidence of Third Dredge-up in Post-AGB Stars in Galactic Globular Clusters
To better understand the mixing and mass loss experienced by low-mass stars as they ascend the asymptotic giant branch (AGB), I have gathered from the literature the abundances of CNO and s -process elements in post-AGB stars in Galactic globular ...
William V. Dixon
doaj +1 more source
Post-AGB Binaries as Interacting Systems
We present recent progress in our understanding of the physical interaction mechanisms at work in evolved binaries of low-to-intermediate initial mass, which are surrounded by a stable disc of gas and dust.
Hans Van Winckel
doaj +1 more source
Light-Element Abundance Variations at Low Metallicity: the Globular Cluster NGC 5466
We present low-resolution (R~850) spectra for 67 asymptotic giant branch (AGB), horizontal branch and red giant branch (RGB) stars in the low-metallicity globular cluster NGC 5466, taken with the VIRUS-P integral-field spectrograph at the 2.7-m Harlan J.
Bond +27 more
core +1 more source
A Superwind from Early Post-Red Giant Stars? [PDF]
We suggest that the gap observed at 20,000 K in the horizontal branches of several Galactic globular clusters is caused by a small amount of extra mass loss which occurs when stars start to "peel off" the red giant branch (RGB), i.e., when their ...
Amos Harpaz +5 more
core +3 more sources
Chemistry in anisotropic asymptotic giant branch winds [PDF]
We have constructed a model for chemistry in the outflow of an asymptotic giant branch (AGB) star, using a spheroidal anisotropy in density, after that used by Jura. The predicted distributions of a selection of representative species are shown, and it is suggested that the abundance distributions observed by interferometry in IRC + 10216 may be the ...
Howe, D.A., Millar, TJ
openaire +1 more source

