Results 91 to 100 of about 367,666 (163)

6-arm blue grand design of NGC 309 [PDF]

arXiv, 2015
The geometry and physics of the spiral structure of the giant Hubble type Sc galaxy NGC 309 is studied. A schematic of two patterns with three arms in each is suggested for the blue spiral. The red and blue patterns form together a grand design with two-fold symmetry.
arxiv  

Simulation for the Calibration of Radiation Housekeeping Monitor Onboard BepiColombo/MMO and Application to the Inner Heliosphere Exploration

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract Although primarily a housekeeping instrument for measuring ambient radiation, the Solar Particle Monitor (SPM) onboard BepiColombo can measure high‐energy particles, making it useful for observing phenomena such as galactic cosmic rays and Solar Energetic Particles (SEPs).
G. Kinoshita, H. Ueno, G. Murakami, M. Pinto, K. Yoshioka, Y. Miyoshi   +5 more
wiley   +1 more source

Beyond Flexible: Unveiling the Next Era of Flexible Electronic Systems

Advanced Materials, Volume 36, Issue 51, December 19, 2024.
Flexible electronics are essential in various fields like wearables, healthcare, and environmental sensing due to their flexibility, lightweight construction, and low profile. These systems conform to diverse surfaces, enhancing or replacing bulky instruments in many applications.
Min Sung Kim, Amani S. Almuslem, Wedyan Babatain, Rabab R. Bahabry, Uttam K. Das, Nazek El‐Atab, Mohamed Ghoneim, Aftab M. Hussain, Arwa T. Kutbee, Joanna Nassar, Nadeem Qaiser, Jhonathan P. Rojas, Sohail F. Shaikh, Galo A. Torres Sevilla, Muhammad M. Hussain   +14 more
wiley   +1 more source

Arm & Interarm Star Formation in Spiral Galaxies

, 2010
We investigate the relationship between spiral arms and star formation in the grand-design spirals NGC 5194 and NGC 628 and in the flocculent spiral NGC 6946.
A. K. Leroy, Bigiel, Binney, Blitz, Bush, Calzetti, Calzetti, Elmegreen, Elmegreen, Eskridge, F. Walter, Garcia-Burillo, Gil de Paz, H.-W. Rix, K. Foyle, Kennicutt, Knapen, Koda, Krumholz, Kuno, Leroy, Leroy, Momose, Schinnerer, Schlegel, Sellwood, Tamburro, Thornley, Walter   +28 more
core   +1 more source

Chiral Emission from Optical Metasurfaces and Metacavities

Advanced Photonics Research, Volume 5, Issue 12, December 2024.
Chiral emission with near‐unity degree of circular polarization and strong emission intensities is highly desirable. This review discusses recent experimental demonstrations on chiral emission from achiral emitters that are combined with patterned nanostructures.
Jungho Han, Heejoo Jang, Yeonsoo Lim, Seongheon Kim, Jeheon Lee, Young Chul Jun   +5 more
wiley   +1 more source

Spiral Density Waves in M81. I. Stellar Spiral Density Waves [PDF]

, 2014
Aside from the grand-design stellar spirals appearing in the disk of M81, a pair of stellar spiral arms situated well inside the bright bulge of M81 has been recently discovered by Kendall et al. (2008). The seemingly unrelated pairs of spirals pose a challenge to the theory of spiral density waves.
arxiv   +1 more source

The evolution and history of Vinca alkaloids: From the Big Bang to the treatment of pediatric acute leukemia

Pediatric Blood &Cancer, Volume 71, Issue 11, November 2024.
Abstract An attractive flower from the island of Madagascar has in part saved the lives of thousands of children with acute lymphoblastic leukemia (ALL). Random mutations and alterations to the genome led to the evolution of genes encoding enzymes, which would provide the periwinkle flower an arsenal of secondary metabolites to survive within the ...
Jeffrey W. Taub, Steven A. Buck, Ana C. Xavier, Holly Edwards, Larry H. Matherly, Yubin Ge   +5 more
wiley   +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

Grand Design Spiral Arms in A Young Forming Circumstellar Disk [PDF]

, 2016
We study formation and long-term evolution of a circumstellar disk in a collapsing molecular cloud core using a resistive magnetohydrodynamic simulation. While the formed circumstellar disk is initially small, it grows as accretion continues and its radius becomes as large as 200 AUs toward the end of the Class-I phase.
arxiv   +1 more source

Ten Billion Years of Galaxy Evolution

, 2002
Observations in the Hubble Deep Fields have been used to study the evolution of galaxy morphology over time. The majority of galaxies with z < 1 are seen to be disk like, whereas most objects with z > 2 appear to be either chaotic or centrally ...
Kauffmann G., Sidney van den Bergh
core   +2 more sources