Results 111 to 120 of about 482,012 (314)
Noble gases and nitrogen in material from asteroid Bennu
Meteoritics &Planetary Science, EarlyView.Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty +7 more
wiley +1 more source
A simple model of spiral galaxies from geometric optics
AIP AdvancesWe propose a simple model of spiral galaxies based on the interference of gravitational waves. The interference is deduced from geometric optics analysis of the refractive index profiles that mimic the behavior of gravitational potentials −1/r and r2. We
Bogdan Szafraniec, James N. Blake
doaj +1 more source
THE TWO-PHASE FORMATION HISTORY OF SPIRAL GALAXIES TRACED BY THE COSMIC EVOLUTION OF THE BAR FRACTION [PDF]
, 2012 We study the evolution of galactic bars and the link with disk and spheroid formation in a sample of zoom-in cosmological simulations. Our simulation sample focuses on galaxies with present-day stellar masses in the 1010–1011 M☉ range, in field and loose
K. Kraljic, F. Bournaud, M. Martig
semanticscholar +1 more source
Plant Biotechnology Journal, EarlyView.ABSTRACT Forward genetics has been instrumental in identifying genes underlying desirable traits, yet its application to polyploid plants, many of which are key agricultural crops, remains challenging due to their genomic complexity. Therefore, we developed BenthMap, a bulk segregant analysis platform for high‐throughput trait mapping and gene ...
Zuba Ahmed +5 more
wiley +1 more source
A Comprehensive Analysis on the Nature of the Spiral Arms in NGC 3686, NGC 4321, and NGC 2403
GalaxiesIn theoretical investigations, various mechanisms have been put forward to explain the emergence of spiral patterns in galaxies. One of the few ways to find out the nature of spirals in a particular galaxy is to consider the so-called corotation radius ...
Valeria Kostiuk +3 more
doaj +1 more source
The future of galaxies and the fate of intelligent life [PDF]
Serbian Astronomical Journal, 1999 We investigate the influence of recent advances in research on the gaseous content of the universe on our knowledge of star formation histories of spiral galaxies.
Ćirković M.M.
doaj +1 more source
Radial Metallicity Distribution Breaks at Corotation Radius in Spiral Galaxies [PDF]
, 2012 We analyzed the relation between the corotation radii and the galactic radii at which breaks or changes of slope of the metallicity gradients occur in spiral galaxies.
S. Scarano, J. L'epine
semanticscholar +1 more source
, 2021 Notre vision des galaxies a beaucoup changé depuis l’ère des grands relevés de galaxies, tels que le Sloan, qui nous apportent une grande statistique avec des millions de galaxies. La classification de la séquence de Hubble est toujours très utilisée, mais elle s’est enrichie de grandes catégories basées sur les couleurs, qui tracent la formation ...
openaire +1 more source
SECULAR EVOLUTION OF SPIRAL GALAXIES [PDF]
Journal of The Korean Astronomical Society, 2003 15 pages, 8 figures, Invited talk presented at the 2nd APCTP workshop on Astrophysics, Pohang, Korea (June 2002)
openaire +2 more sources
Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight
Experimental Physiology, EarlyView.Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley +1 more source