Results 101 to 110 of about 9,884 (228)

Post-Asymptotic Giant Branch Evolution of Low- and Intermediate-Mass Stars. Preliminary Results [PDF]

, 2014
Preliminary results from an ongoing project to compute a grid of post-AGB models is presented. Our preliminary results show that stellar evolution computations that include an updated treatment of the microphysics predict post-AGB timescales that are ...
M. M. Bertolami
semanticscholar   +1 more source

Parameterising the Third Dredge-up in Asymptotic Giant Branch Stars [PDF]

Publications Astronomical Society of Australia, 2002
We present new evolutionary sequences for low and intermediate mass stars (1−6M ⊙) for three different metallicities, Z = 0.02, 0.008, and 0.004. We evolve the models from the pre-main sequence to the thermally-pulsing asymptotic giant branch phase.
Amanda I. Karakas, J. Lattanzio, O. Pols
semanticscholar   +1 more source

An Innovative Tool for Measuring Sunlight Propagation Through Different Snowpacks

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract Sunlight penetration in the snowpack plays a fundamental role in many environmental processes, ranging from local energy balance to snow microbiology and can potentially contribute to climate change. In addition, many photochemical reactions typically occur in the snowpack driven by solar radiation.
Luca Teruzzi, Andrea Spolaor, David Cappelletti, Claudio Artoni, Marco A. C. Potenza   +4 more
wiley   +1 more source

Envelope loss of RGB/AGB stars and the formation of hot subdwarfs

EPJ Web of Conferences, 2013
Low mass stars may lose their envelopes in the first giant branch (RGB) or the asymptotic giant branch (AGB) via envelope ejection (i.e. superwind). The envelope loss of AGB stars leads to the formation of carbon-oxygen (CO) white dwarfs (WDs), while the
Chen X., Han Z.
doaj   +1 more source

THE s-PROCESS IN ASYMPTOTIC GIANT BRANCH STARS OF LOW METALLICITY AND THE COMPOSITION OF CARBON-ENHANCED METAL-POOR STARS [PDF]

, 2011
We present models for the slow neutron-capture process (s-process) in asymptotic giant branch stars of metallicity [Fe/H] = −2.3 and masses 0.9–6 M☉. We encountered different regimes of neutron-capture nucleosynthesis listed here increasing in importance
M. Lugaro, A. Karakas, R. Stancliffe, Carlos Rijs   +3 more
semanticscholar   +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

Mira Variables Based on Emission Lines in LAMOST DR9

The Astrophysical Journal
We present a sample of 335 Mira variables, extracted from DR9 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey. These variables are characterized by the Balmer emissions (H δ , H γ , H β , and H α ) and the metal emissions
Cai-Xia Qu, A-Li Luo, Bing Du, Shu-Guo Ma   +3 more
doaj   +1 more source

Stellar evolution as seen by mixed modes

EPJ Web of Conferences, 2015
The detection of mixed modes in subgiants and red giants allows us to monitor stellar evolution from the main sequence to the asymptotic giant branch and draw seismic evolutionary tracks.
Mosser Benoît
doaj   +1 more source

CYANOGEN IN NGC 1851 RED GIANT BRANCH AND ASYMPTOTIC GIANT BRANCH STARS: QUADRIMODAL DISTRIBUTIONS [PDF]

The Astrophysical Journal, 2012
The Galactic globular cluster NGC 1851 has raised much interest since Hubble Space Telescope photometry revealed that it hosts a double subgiant branch. Here we report on our homogeneous study into the cyanogen (CN) band strengths in the red giant branch (RGB) population (17 stars) and asymptotic giant branch (AGB) population (21 stars) using AAOmega ...
Campbell, S, Yong, David, Wylie de Boer, Elizabeth, Stancliffe, R J, Lattanzio, John, Angelou, G C, D'Orazi, V D, Martell, S L, Grundahl, Frank, Sneden, Chris   +9 more
openaire   +2 more sources

NUCLEOSYNTHESIS IN ELECTRON CAPTURE SUPERNOVAE OF ASYMPTOTIC GIANT BRANCH STARS [PDF]

, 2008
We examine nucleosynthesis in the electron capture supernovae of progenitor asymptotic giant branch stars with an O–Ne–Mg core (with the initial stellar mass of 8.8 M☉).
S. Wanajo, S. Wanajo, Ken'ichi Nomoto, Ken'ichi Nomoto, H. Janka, F. Kitaura, Bernhard Müller   +6 more
semanticscholar   +1 more source