Results 61 to 70 of about 1,482,462 (172)

Agb (Asymptotic Giant Branch): Star Evolution

, 1987
Asymptotic giant branch stars are red supergiant stars of low-to-intermediate mass. This class of stars is of particular interest because many of these stars can have nuclear processed material brought up repeatedly from the deep interior to the surface ...
Becker, S. A.
core  

Thermally-pulsing asymptotic giant branch stars in the Magellanic Clouds [PDF]

, 2009
We present the latest results of a theoretical project aimed at investigating the properties of thermally-pulsing asymptotic giant branch (TP-AGB) stars in different host systems.
GRANATO GIAN LUIGI, GROENEWEGEN MARTIN A. T, ARINGER, BERNHARD, SILVA LAURA, MARIGO, PAOLA, BRESSAN ALESSANDRO, GIRARDI LEO   +6 more
core   +1 more source

Charting circumstellar chemistry of carbon-rich asymptotic giant branch stars

Astronomy & Astrophysics
Context. The circumstellar envelopes of AGB stars are sites of rich molecular chemistry. The present understanding of C-rich AGB chemistry largely relies on observations of the archetypal carbon star IRC+10 216.
Unnikrishnan R., De Beck E., Nyman L.-Å., Olofsson H., Vlemmings W. H. T., Maercker M., Van de Sande M., Millar T. J., Danilovich T., Andriantsaralaza M., Charnley S. B., Rawlings M. G.   +11 more
doaj   +1 more source

White dwarf planets

EPJ Web of Conferences, 2013
The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage ...
Bonsor Amy, Veras Dimitri, Villaver Eva, Mustill Alexander J., Wyatt Mark C.   +4 more
doaj   +1 more source

Edge of Chaos Theory Unveils the First and Simplest Ever Reported Hodgkin–Huxley Neuristor

Advanced Electronic Materials, Volume 11, Issue 8, June 2025.
This manuscript presents the first and simplest ever‐reported electrical cell, which leverages one memristor on Edge of Chaos to reproduce the three‐bifurcation cascade, marking the entire life cycle from birth to extinction via All‐to‐None effect of an electrical spike, also referred to as Action Potential, across axon membranes under monotonic ...
Alon Ascoli, Ahmet Samil Demirkol, Ioannis Messaris, Vasilis Ntinas, Dimitris Prousalis, Stefan Slesazeck, Thomas Mikolajick, Fernando Corinto, Michele Bonnin, Marco Gilli, Pier Paolo Civalleri, Ronald Tetzlaff, Leon Chua   +12 more
wiley   +1 more source

Ba Enrichment in Gaia MS+WD Binaries: Tracing s-process Element Production

The Astrophysical Journal Letters
A large population of intermediate-separation binaries, consisting of a main-sequence (MS) star and a white dwarf (WD), recently emerged from Gaia’s third data release (DR3), posing challenges to current models of binary evolution. Here we examine the s -
Param Rekhi, Sagi Ben-Ami, Na’ama Hallakoun, Sahar Shahaf, Silvia Toonen, Hans-Walter Rix   +5 more
doaj   +1 more source

The Radio Wave Polarization of Saturn Lightning Observed by Cassini

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer, M. Imai, U. Taubenschuss, D. Píša, W. S. Kurth   +4 more
wiley   +1 more source

Infrared excess around nearby red giant branch stars and Reimers law (

, 2012
Context. Mass loss is one of the fundamental properties of asymptotic giant branch (AGB) stars, but for stars with initial masses below  ~1 M⊙, the mass loss on the first red giant branch (RGB) actually dominates mass loss on the AGB.
M. A. T. Groenewegen, Groenewegen M. A. T.   +1 more
core   +1 more source

High mass-loss asymptotic giant branch stars detected by the Midcourse Space Experiment in the 'intermediate' and 'outer' Galactic bulge

, 2007
We present a study of Midcourse Space Experiment (MSX) point sources in the Galactic bulge (|l| < 3°, 1° < |b| < 5°), observed in the A, C, D and E bands (8–21μm), with a total area ∼48 deg2 and more than 7000 detected sources in the MSXD band ...
Ojha, D., K., Tej, A., Omont, A., K. Ojha A. Tej M. Schultheis A. Omont F. Schuller, D., Schultheis, M., Schuller, F., Ojha, D. K.   +6 more
core   +1 more source

Extra–Mixing Processes in Asymptotic Giant Branch Stars [PDF]

, 2011
Extra mixing is the mixing of material in regions that are stable against convection. We identify two situations in asymptotic giant branch stars where extra mixing is thought to be required.
Stancliffe, Richard James, Lattanzio, John Charles   +1 more
core   +3 more sources