Results 81 to 90 of about 8,690 (179)

Density waves and star formation in grand design spirals

, 2013
HII regions in the arms of spiral galaxies are indicators of recent star-forming processes. They may have been caused by the passage of the density wave or simply created by other means near the arms.
Bongiovanni, Á., Castañeda, H., Cedrés, B., Cepa, J., Sáchez-Portal, M., Tomita, A   +5 more
core   +1 more source

A Chromosome Inversion Creates a Supergene for Sex and Colour in Lake Malawi Cichlids

Molecular Ecology, Volume 34, Issue 20, October 2025.
ABSTRACT Cichlid fishes have the highest rates of evolutionary turnover of sex chromosomes among vertebrates. Many large structural polymorphisms in the radiation of cichlids in Lake Malawi are associated with sex chromosomes and may also carry adaptive variation.
Kristen A. Behrens, Soumya Jailwala, Frances E. Clark, Anne C. Meyer, Nikesh M. Kumar, Adrianus F. Konings, Reade B. Roberts, Matthew A. Conte, Jeffrey T. Streelman, Patrick T. McGrath, Thomas D. Kocher   +10 more
wiley   +1 more source

Multifunctional Chiral Halide Perovskites: Advancing Chiro‐Optics, Chiro‐Optoelectronics, and Spintronics

Advanced Science, Volume 12, Issue 34, September 11, 2025.
This review spotlights key advances in chiral halide perovskite materials and devices, covering device architectures, fabrication methods, and emerging applications like circularly polarized light functions, neuromorphic computing, and spintronics. It explores structure‐property relationships and chirality transfer mechanisms, discusses challenges in ...
Qi Liu, Hui Ren, Qi Wei, Mingjie Li
wiley   +1 more source

The Relative Accuracy of Different Methods for Measuring Mind Wandering Subtypes: A Systematic Review

Brain and Behavior, Volume 15, Issue 8, August 2025.
How do we accurately measure mind wandering? This review compares five methods: from self‐reports (prone to bias) to brain scans (precise but expensive). No single method captures all aspects, so we propose the MAMW framework—a unified approach combining strengths of each technique.
Sholeh Nazari, Paul Fitzgerald, Reza Kazemi   +2 more
wiley   +1 more source

Using synthetic emission maps to constrain the structure of the Milky Way

, 2013
We present the current standing of an investigation into the structure of the Milky Way. We use smoothed particle hydrodynamics (SPH) to simulate the ISM gas in the Milky Way under the effect of a number of different gravitational potentials representing
Acreman, David, Dobbs, Clare, Pettitt, Alex, Price, Daniel   +3 more
core   +1 more source

C13‐Deacylase from Nocardioides albus Resp. Streptomyces sp., Catalyzing Side Chain Hydrolysis on the Taxane Core

ChemCatChem, Volume 17, Issue 15, August 7, 2025.
An enzyme that has been identified and characterized as capable of hydrolyzing paclitaxel (Taxol), a key anticancer drug derived from Pacific yew (Taxus brevifolia) has been identified. Molecular docking (MD) simulations map the catalytic triad and critical residues that drive substrate‐enzyme interactions. The findings indicate the catalytic potential
Jinfen Su, Eugen Schell, Thomas Heine, Marion B. Ansorge‐Schumacher   +3 more
wiley   +1 more source

Cloud and Star Formation in Spiral Arms

, 2014
We present the results from simulations of GMC formation in spiral galaxies. First we discuss cloud formation by cloud-cloud collisions, and gravitational instabilities, arguing that the former is prevalent at lower galactic surface densities and the ...
Dobbs, Clare, Pettitt, Alex
core   +1 more source

Analysis, Testing, and Design of a UHF and HF Peer‐to‐Peer Communication System for the Europan Cryosphere

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract This study presents a validated design of a dual‐band wireless relay system of “pucks” for through‐ice communication between a cryobot and a surface lander during a future exploration of the Europan cryosphere. The design of a terrestrial demonstration system and the results of a 103 m through‐ice system test in a relevant environment near ...
Jake Sahli, Albin J. Gasiewski, William C. Stone, Brian Pease, Veronica Guerrero, Vickie Siegel, Justin Smith   +6 more
wiley   +1 more source

A direct test of density wave theory in a grand-design spiral galaxy

, 2019
The exact nature of the arms of spiral galaxies is still an open question1. It has been widely assumed that spiral arms in galaxies with two distinct symmetrical arms are the products of density waves that propagate around the disk, with the spiral arms being visibly enhanced by the star formation that is triggered as the passing wave compresses gas in
Peterken, Thomas G., Merrifield, Michael R., Drory, Niv, Krawczyk, Coleman M., Masters, Karen L., Weijmans, Anne-Marie, Westfall, Kyle B.   +6 more
openaire   +1 more source

On the chains of star complexes and superclouds in spiral arms

, 2010
The relation is studied between occurrence of a regular chain of star complexes and superclouds in a spiral arm, and other properties of the latter. A regular string of star complexes is located in the north-western arm of M31; they have about the same ...
Alfaro, Baade, Baba, Bastian, Beck, Beck, Berdnikov, Boeshaar, Braun, Chemin, Chernin, Chernin, Churchwell, Chyzy, Clarke, De La Fuente Marcos, Dobbs, Dobbs, Dobbs, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Efremov, Egusa, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Franco, Gittins, Grabelsky, Grabelsky, Grosbøl, Hou, Kang, Kaplan, Lee, Lee, Levine, Loinard, Martínez-García, McGee, Mouschovias, Nakanishi, Neininger, Odekon, Pellet, Roberts, Stock, Tamburro, Vallée, Vallée, Van Den Bergh, Walter, Yu. N. Efremov   +68 more
core   +1 more source