Results 71 to 80 of about 29,336 (265)

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

CLEAR EVIDENCE FOR THE PRESENCE OF SECOND-GENERATION ASYMPTOTIC GIANT BRANCH STARS IN METAL-POOR GALACTIC GLOBULAR CLUSTERS [PDF]

, 2015
Galactic globular clusters (GCs) are known to host multiple stellar populations: a first generation (FG) with a chemical pattern typical of halo field stars and a second generation (SG) enriched in Na and Al and depleted in O and Mg.
D. A. García-Hernández, S. Mészáros, M. Monelli, S. Cassisi, P. Stetson, O. Zamora, M. Shetrone, S. Lucatello   +7 more
semanticscholar   +1 more source

From the atmosphere to the circumstellar environment in cool evolved stars

, 2014
We discuss and illustrate contributions that optical interferometry has made on our current understanding of cool evolved stars. We include red giant branch (RGB) stars, asymptotic giant branch (AGB) stars, and red supergiants (RSGs).
Paladini, Claudia, Wittkowski, Markus
core   +1 more source

Detailed AGB evolutionary models and near infrared colours of intermediate-age stellar populations: Tests on star clusters [PDF]

, 2014
We investigate the influence of Asymptotic Giant Branch stars on integrated colours of star clusters of ages between ~100 Myr and a few gigayears, and composition typical for the Magellanic Clouds.
Cassara', L., Chiosi, C., Piovan, L., Salaris, M., Weiss, A.   +4 more
core   +1 more source

CHEMICAL ANALYSIS OF ASYMPTOTIC GIANT BRANCH STARS IN M62 [PDF]

, 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, A. Mucciarelli, F. Ferraro, L. Origlia, B. Lanzoni, D. Massari, D. Massari, E. Dalessandro   +7 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

Tracing the Evolution of SMBHs and Stellar Objects in Galaxy Mergers: A Multi-mass Direct N-body Model

The Astrophysical Journal, 2023
By using direct N -body numerical simulations, we model the dynamical coevolution of two supermassive black holes (SMBHs) and the surrounding stars in merging galaxies. In order to investigate how different stellar components evolve during the merger, we
Shuo Li, Shiyan Zhong, Peter Berczik, Rainer Spurzem, Xian Chen, F. K. Liu   +5 more
doaj   +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

A Study of the Dusty Disks and Shells around Post-RGB Stars in the LMC

Galaxies, 2022
A new class of dusty post-Red Giant Branch (post-RGB) stars has recently been identified in the Magellanic Clouds. Their spectral energy distributions (SEDs) suggest that their mass-ejecta are similar to dusty post-Asymptotic Giant Branch (post-AGB ...
Geetanjali Sarkar, Raghvendra Sahai
doaj   +1 more source