Results 1 to 10 of about 25,760 (233)

Turbulent Dynamo in Asymptotic Giant Branch Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2001
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.
Andersen, Balbus, Blackman, Blackman, Brandenburg, Brandenburg, Brandenburg, Chevalier, Essam Zoabi, Fleischer, Garcia-Segura, Garcia-Segura, Garcia-Segura, Habing, Hünsch, Hünsch, Jura, Kemball, Knapp, Matt, Noam Soker, Noyes, Palen, Pascoli, Peres, Saar, Schröder, Soker, Soker, Soker, Soker, Soker, Wood   +32 more
core   +8 more sources

Magnetic Flares on Asymptotic Giant Branch Stars [PDF]

The Astrophysical Journal, 2002
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.
Bochanski J. J., Burlaga L. F., Dorfi E. A., Hunsch M., Hunsch M., Joel H. Kastner, Loup C., Noam Soker, Reimers C., Schroder K.-P., Woitke P., Woitke P., Woitke P., Zijlstra A. A.   +13 more
core   +8 more sources

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 ...
Andersen A. C., Dorfi E. A., Hunsch M., Icke V., Mauron N., Noam Soker, Reimers C.   +6 more
core   +9 more sources

The s-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 ...
Alongi M., Dreizler S., Falk Herwig, Freytag B., Goriely S., Groenewegen M. A. T., Herwig F., Herwig F., Herwig F., Herwig F., Icke V., Jorissen A., Jorissen A., Koester D., Koesterke L., Langer N., Langer N., Maria Lugaro, Marigo P., Marigo P., Mazzitelli I., McWilliam A., Mowlavi N., Mowlavi N., Norbert Langer, Reimers C., Salasnich B., Schaller G., Spruit H. C., Stasinska G., Van Winckel H., Weidemann V., Weidemann V., Xiong D. R.   +33 more
core   +4 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, Palmerini Sara, Vescovi Diego   +2 more
doaj   +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, Luciano Piersanti, Oscar Straniero   +2 more
doaj   +4 more sources

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, Le Bertre Thibaut, Hoai Do Thi, Wong Ka Tat, Nhung Pham Tuyet, Lesaffre Pierre, Kim Wonju, Darriulat Pierre   +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, H. Imai, J. F. Gómez, D. Tafoya, G. Orosz, T. P. McCarthy, Y. Hamae, K. Amada   +7 more
doaj   +1 more source

Magnetic and non-magnetic AGB mixing for s-processing [PDF]

EPJ Web of Conferences, 2023
I outline a few features of recent models for the formation of the neutron source 13C(α,n)16O in low mass stars (1 ≲ M/M⊙ ≲ 3, LMS ) ascendingfor the second time the Red Giant Branch, generally called Asymptotic Giant Branch, or AGB stars. I also briefly
Busso Maurizio
doaj   +1 more source