Results 71 to 80 of about 4,442 (177)
The s process in rotating low-mass AGB stars - Nucleosynthesis calculations in models matching asteroseismic constraints [PDF]
, 2019 AimsWe investigate the s-process during the AGB phase of stellar models whose cores are enforced to rotate at rates consistent with asteroseismology observations of their progenitors and successors.MethodsWe calculated new 2 M?, Z = 0.01 models, rotating
Hirschi
core +1 more source
Post-AGB stars in the AKARI survey
, 2009 Obscured by their circumstellar dusty envelopes post-AGB stars emit a large fraction of their energy in the infrared and thus, infrared sky surveys like IRAS were essential for discoveries of post-AGBs in the past. Now, with the AKARI infrared sky survey we can extend our knowledge about the late stages of stellar evolution.
Siodmiak, Natasza +3 more
openaire +2 more sources
Evolution and Pulsations of Population I Post-AGB Stars [PDF]
Astronomy Letters, 2019 Evolutionary calculations of population I stars with initial masses $M_0=1M_\odot$, $1.5M_\odot$ and $2M_\odot$ were carried out up to the stage of the proto--planetary nebula. Selected models of post--AGB evolutionary sequences with effective temperatures $3.6\times 10^3\,\mathrm{K}\lesssim T_\mathrm{eff}\lesssim 2\times 10^4\,\mathrm{K}$ were used as
openaire +2 more sources
FRUITY Upgrades on AGB Evolution and Nucleosynthesis [PDF]
, 2015 Asymptotic Giant Branch (AGB) stars are among the major polluters of the interstellar medium. These objects produce both light (C, N, O, F, Na) and heavy elements (via the slow neutron capture process, the s-process).
STRANIERO, Oscar +2 more
core
, 2016 This review presents the latest advances in the nebular studies of post-AGB objects. Post-AGB stars are great tools to test nucleosynthesis and evolution models for stars of low and intermediate masses, and the evolution of dust in harsh environment.
Eric Lagadec
core +1 more source
Evolutionary Models for AGB Stars in the Magellanic Clouds [PDF]
, 2011 AGB stars in the Magellanic Clouds (MCs) are the most robust calibrators for the modelling of this phase, thanks to the large collection of high-quality data (photometry, chemistry, pulsation properties, mass-loss, dust features, etc.) presently ...
Aringer, B. +5 more
core
NEAR-INFRARED SPECTROSCOPY OF POST-AGB STARS [PDF]
, 1995 The results of a medium resolution near-infrared spectral survey of 18 post-AGB candidate stars are presented. Most of the stars have near-infrared hydrogen lines in absorption, which is normal for their spectral types.
WATERS, LBFM +3 more
core +1 more source
Post-AGB Stars with Circumbinary Discs
, 2012 Circumbinary discs are commonly observed around post-asymptotic giant branch (AGB) systems and are known to play an important role in their evolution. Several studies have pointed out that a circumbinary disc interacts through resonances with the central binary and leads to angular momentum transfer from the central binary orbit to the disc.
Dermine, Tyl +3 more
openaire +2 more sources
Starlight and Sandstorms : Mass Loss Mechanisms on the AGB
, 2011 There are strong observational indications that the dense slow winds of cool luminous AGB stars are driven by radiative pressure on dust grains which form in the extended atmospheres resulting from pulsation-induced shocks.
Höfner, Susanne,
core
Spectroscopic survey of post-AGB star candidates
, 2006 Aims.Our goal is to establish the true nature of post-AGB star candidates and to identify new post-AGB stars. Methods.We used low resolution optical spectroscopy and we compared the spectra of the candidate post-AGB stars with those of stars in ...
L. F. Miranda, C. B. Pereira
core +1 more source