Results 111 to 120 of about 1,424,303 (245)

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 Production of Germanium in Asymptotic Giant Branch stars [PDF]

Proceedings of International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX — PoS(NIC-IX), 2010
Observations of planetary nebulae by Sterling, Dinerstein and Bowers have revealed enhancements in the element Germanium (Ge) by factors of 3 to 10 compared to solar. Germanium can be produced by slow-neutron capture (s-process) in asymptotic giant branch (AGB) stars.
Amanda Karakas, Maria Lugaro, Roberto Gallino   +2 more
openaire   +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

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

Classification study of WISE infrared sources: identification of candidate asymptotic giant branch stars

, 2013
In the Wide-field Infrared Survey Explorer (WISE) all-sky source catalog there are 76 million mid-infrared point sources that were detected in the first three WISE bands and have association with only one 2MASS near-IR source within 3 ''.
Tu, Xun, Wang, Zhong-Xiang
core  

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

New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue [PDF]

, 2014
We have commenced a detailed analysis of the known sample of Galactic post-asymptotic giant branch (PAGB) objects compiled in the Toru´ n catalogue of Szczerba et al., and present, for the first time, homogeneously derived distance determinations for the
Shane B. Vickers, D. Frew, Ouentin A. Parker, I. Bojičić   +3 more
semanticscholar   +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