Turbulent dynamo in asymptotic giant branch stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 Using recent results on the operation of turbulent dynamos, we show that a turbulent dynamo can amplify a large scale magnetic field in the envelopes of asymptotic giant branch (AGB) stars.
Noam Soker, Essam Zoabi
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Magnetic Flares on Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal, 2003 We investigate the consequences of magnetic flares on the surface of asymptotic giant branch (AGB) and similar stars. In contrast to the solar wind, in the winds of AGB stars the gas cooling time is much shorter than the outflow time.
Noam Soker, Joel H. Kastner
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A Solar‐like Cycle in Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal, 2000 I propose that the mechanism behind the formation of concentric semi-periodic shells found in several planetary nebulae (PNs) and proto-PNs, and around one asymptotic giant branch (AGB) star, is a solar-like magnetic activity cycle in the progenitor AGB ...
Noam Soker
core +9 more sources
Thes‐Process in Rotating Asymptotic Giant Branch Stars
The Astrophysical Journal, 2003 (abridged) We model the nucleosynthesis during the thermal pulse phase of a rotating, solar metallicity AGB star of 3M_sun. Rotationally induced mixing during the thermal pulses produces a layer (~2E-5M_sun) on top of the CO-core where large amounts of ...
Falk Herwig, N. Langer, Maria Lugaro
core +5 more sources
CHEMICAL ANALYSIS OF ASYMPTOTIC GIANT BRANCH STARS IN M62 [PDF]
The Astrophysical Journal, 2015 We have collected UVES-FLAMES high-resolution spectra for a sample of 6 asymptotic giant branch (AGB) and 13 red giant branch (RGB) stars in the Galactic globular cluster (GC) M62 (NGC 6266).
E. Lapenna +6 more
semanticscholar +10 more sources
Evolution of asymptotic giant branch stars. I. Updated synthetic TP-AGB models and their basic calibration [PDF]
, 2007 We present new synthetic models of the TP-AGB evolution. They are computed for 7 values of initial metal content (Z from 0.0001 to 0.03) and for initial masses between 0.5 and 5.0 M , thus extending the low- and intermediate-mass tracks of Girardi et al.
Paola Marigo, L. Girardi
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IDENTIFICATION OF A CLASS OF LOW-MASS ASYMPTOTIC GIANT BRANCH STARS STRUGGLING TO BECOME CARBON STARS IN THE MAGELLANIC CLOUDS [PDF]
, 2015 We have identified a new class of Asymptotic Giant Branch (AGB) stars in the Small and Large Magellanic Clouds (SMC/LMC) using optical to infrared photometry, light curves, and optical spectroscopy.
Martha L. Boyer +6 more
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Evolution of thermally pulsing asymptotic giant branch stars – II. Dust production at varying metallicity [PDF]
, 2013 We present the dust ejecta of the new stellar models for the Thermally Pulsing Asymptotic Giant Branch (TP-AGB) phase computed with the COLIBRI code. We use a formalism of dust growth coupled with a stationary wind for both M and C-stars. In the original
A. Nanni +3 more
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Synthesis of thorium and uranium in asymptotic giant branch stars [PDF]
Astronomy & Astrophysics, 2022 The intermediate neutron capture process (i-process) operates at neutron densities between those of the slow and rapid neutron-capture processes. It can be triggered by the ingestion of protons in a convective helium-burning region.
A. Choplin, S. Goriely, L. Siess
semanticscholar +1 more source
Multiple Stellar Populations in Asymptotic Giant Branch Stars of Galactic Globular Clusters [PDF]
, 2021 Multiple stellar populations (MPs) are a distinct characteristic of globular clusters (GCs). Their general properties have been widely studied among main-sequence, red giant branch (RGB), and horizontal branch (HB) stars, but a common framework is still ...
E. Lagioia +10 more
semanticscholar +1 more source