Results 71 to 80 of about 26,787 (255)

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

Turbulence of Tropical Cyclones: From Peristrophic to Zonostrophic

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 14, 28 July 2025.
Abstract Cyclostrophic rotation in the core region of tropical cyclones (TCs) imprints a distinct signature upon their turbulence structure. Its intensity is characterized by the radius of maximum wind, Rmw ${R}_{mw}$, and the azimuthal wind velocity at that radius, Umax ${U}_{max}$.
Boris Galperin, Alexander K. Nickerson, Gregory P. King, Jun A. Zhang   +3 more
wiley   +1 more source

Quantifying Uncertainties on the Tip of the Red Giant Branch Method

The Astronomical Journal, 2023
We present an extensive grid of numerical simulations quantifying the uncertainties in measurements of the tip of the red giant branch (TRGB). These simulations incorporate a luminosity function composed of 2 mag of red giant branch (RGB) stars leading ...
Barry F. Madore, Wendy L. Freedman, Kayla A. Owens, In Sung Jang   +3 more
doaj   +1 more source

Photodissociation in proto-planetary nebulae. Hydrodynamical simulations and solutions for low-velocity multi-lobes

, 2010
We explore the effects of photodissociation at the stages of post-asymptotic giant branch stars to find a mechanism able to produce multi-polar shapes. We perform two-dimensional gasdynamical simulations to model the effects of photodissociation in proto-
Abgrall, Balick, Bjorkman, Blöcker, Bodenheimer, Chita, Chu, Clarke, Dalgarno, Diaz-Miller, Draine, Dwarkadas, Franco, Frank, G. García-Segura, García-Segura, García-Segura, García-Segura, García-Segura, Giuliani, Heger, Henney, Hollenbach, Icke, Icke, Icke, Kwok, Langer, Latter, Livio, Mac Low, MacDonald, Manchado, Matt, Mellema, Natta, Rijkhorst, Rózyczka, Sahai, Sahai, Sahai, Schwarz, Soker, Stanghellini, Stanghellini, Stone, Tenorio-Tagle, Vassiliadis, Villaver, Vishniac, Whalen, Williams   +51 more
core   +1 more source

Multiple populations along the asymptotic giant branch of the globular cluster M 4 [PDF]

, 2016
Nearly all Galactic globular clusters host stars that display characteristic abundance anti-correlations, like the O-rich/Na-poor pattern typical of field halo stars, together with O-poor/Na-rich additional components.
A. Savino, Brown, C. Lardo, Cassisi, García-Hernández, Gratton, Lapenna, M. Salaris, MacLean, P. B. Stetson, P. Donati, S. Cassisi, Stetson, Valcarce   +13 more
core   +4 more sources

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

Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars

The Astronomical Journal
S-type asymptotic giant branch (AGB) stars are defined by their carbon-to-oxygen (C/O) ratio approaching unity. However, observations of circumstellar molecules in these stars are limited and challenging.
Yanan Feng, Xiaohu Li, Xiaofeng Yang, Tom J. Millar, Ryszard Szczerba, Sheng-Li Qin, Xuejian Jiang, Donghui Quan, Juan Tuo, Zhenzhen Miao, Sheng-Yuan Liu, Xiang Liu   +11 more
doaj   +1 more source

Non-radial oscillations in M-giant semi-regular variables: Stellar models and Kepler observations

, 2014
The success of asteroseismology relies heavily on our ability to identify the frequency patterns of stellar oscillation modes. For stars like the Sun this is relatively easy because the mode frequencies follow a regular pattern described by a well ...
Bedding, T. R., Bellamy, B., Christensen-Dalsgaard, J., Compton, D., Garcia, R. A., Kiss, L. L., Kjeldsen, H., Mathur, S., Stello, D.   +8 more
core   +1 more source

FLUORINE ABUNDANCES IN GALACTIC ASYMPTOTIC GIANT BRANCH STARS

The Astrophysical Journal, 2010
An analysis of the fluorine abundance in Galactic asymptotic giant branch (AGB) carbon stars (24 N-type, 5 SC-type, and 5 J-type) is presented. This study uses the state-of-the-art carbon-rich atmosphere models and improved atomic and molecular line lists in the 2.3 μm region.
Abia C., Cunha K., Cristallo S., de Laverny P., Domínguez I., Eriksson K., Gialanella L., Hinkle K., IMBRIANI, GIANLUCA, Recio Blanco A., Smith V. V., Stranier, O., Wahlin R.   +12 more
openaire   +3 more sources

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