Results 111 to 120 of about 51,405 (265)
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
The Effect of Corotation on the Radial Gradient of Metallicity of Spiral Galaxies
, 2010 The corotation radius in a spiral galaxy is the radius where the spiral pattern speed has the same velocity of the rotation curve. By compiling results from the literature for 20 spiral galaxies we verified a strong correlation between the radius of the ...
Lepine, J. R. D., Scarano Jr., S.
core +1 more source
Galaxy rotation curves. The theory
, 2013 The non-gauge vector field with as simple as possible Lagrangian (\ref{Lagrangian}) turned out an adequate tool for macroscopic description of the main properties of dark matter. The dependence of the velocity of a star on the radius of the orbit $V\left(r\right) $ -- galaxy rotation curve -- is derived analytically from the first principles ...
openaire +2 more sources
The Discrepancy in Galaxy Rotation Curves
, 2019 In this work we try a new approach for dealing with the discrepancy between observed galaxy rotation curves and theoretical predictions. This new approach does not involve any changes in the current fundamental laws of nature or the addition of dark halos.
Gomel, Roy, Zimmerman, Tomer
openaire +2 more sources
Galaxy rotation curves in the Grumiller's modified gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 12 pages, 3 figures, 4 ...
Lin, Hai-Nan +3 more
openaire +2 more sources
Journal of Applied Polymer Science, Volume 143, Issue 8, February 20, 2026.A synergistic flame retardant containing melamine polyphosphate and zinc borate was prepared and applied to provide rLLDPE/CaCO3 composites with superior flame retardancy. ABSTRACT The use of recycled thermoplastics is crucial for addressing environmental challenges such as waste management and sustainability.
Antonio Benjamim Mapossa +2 more
wiley +1 more source
Role of Gaseous Disk in the Formation of the Spiral Structure of the Milky Way Galaxy
Open Astronomy, 2016 We use observational gaseous and stellar density distributions in the disk of the Milky Way (MW) galaxy together with the disk rotation curve and measured disk velocity dispersion to build collisionless and combined collisionless-gaseous equilibrium ...
Korchagin V. I. +2 more
doaj +1 more source
Annalen der Physik, Volume 538, Issue 1, January 2026.The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley +1 more source
The Luminous Convolution Model as an alternative to dark matter in spiral galaxies [PDF]
, 2014 The Luminous Convolution Model (LCM) demonstrates that it is possible to predict the rotation curves of spiral galaxies directly from estimates of the luminous matter.
Ashley, A. +8 more
core
Astronomische Nachrichten, Volume 347, Issue 1, January 2026.ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley +1 more source