Results 91 to 100 of about 1,782 (230)
Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade
Radio Science, Volume 60, Issue 7, July 2025.Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park +13 more
wiley +1 more source
Square–torsion gravity, dark matter halos and the baryonic Tully–Fisher relation
European Physical Journal C: Particles and Fields, 2020 Square–torsion gravity is applied to the long standing dark matter problem. In this context the theory reduces to General Relativity complemented by a dark stress–energy tensor due to the torsion of spacetime and is studied under the simplifying ...
Elias A. S. Mégier
doaj +1 more source
Wearable sensors in paediatric neurology
Developmental Medicine &Child Neurology, Volume 67, Issue 7, Page 834-853, July 2025.Types of signals monitored in children's natural environments using wearable sensors, and their associated applications in various paediatric neurological conditions. Plain language summary: https://onlinelibrary.wiley.com/doi/10.1111/dmcn.16267 Abstract Wearable sensors have the potential to transform diagnosis, monitoring, and management of children ...
Camila González Barral, Laurent Servais
wiley +1 more source
Towards the Explanation of Flatness of Galaxies Rotation Curves
Universe, 2022 We suggest a new explanation of the flatness of galaxies rotation curves without invoking dark matter. For this purpose, a new gravitational tensor field is introduced in addition to the metric tensor.
openaire +3 more sources
Central Rotation Curves of Galaxies
, 2000 4 pages, 4 figures, in "Galaxy Disks and Disk Galaxies", ASP Conf. Series, Vatical Conf. Rome 2000, eds. J.
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An Edge-on Regular Disk Galaxy at z = 5.289
The Astrophysical JournalWhile rotation-supported gas disks are known to exist as early as at z ≈ 7, it is still a general belief that stellar disks form late in the Universe.
Haojing Yan +2 more
doaj +1 more source
Physical Parameters of Late Type Spiral Galaxies I-Mass and Luminosity of NGC 6946 [PDF]
Journal of Astronomy and Space Sciences, 1985 Using Brandt model the mass distribution of the late type spiral galaxy NGC 6946 was derived, and the total mass was reestimated to understand the M/L ratio of this galaxy. Two kinds of the rotation curve with shape parameter n = 1 and 3.3 were examined.
Sug-Whan Kim, Mun-Suk Chun
doaj
The Survival of the Sagittarius Dwarf Galaxy and the Flatnessof the Rotation Curve of the Galaxy [PDF]
The Astrophysical Journal, 1998 How has the ``fluffy'' core of the Sgr dwarf galaxy survived multiple strong shocks from the tidal force of the Galactic halo and disc since the formation of the core a Hubble time ago? A scenario that Sgr was deflected to its current orbit by the Magellanic Clouds after a rendezvous on the north Galactic pole 2-3 Gyrs ago is examined. It is shown that
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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 ...
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On the formation of galaxies with flat rotation curves
The Astrophysical Journal, 1986 The dynamical development of a gravitationally unstable, initially uniform, collision-free medium has been studied by means of fully self-consistent three-dimensional numerical experiments. The system is encouraged to form just one blob by means of a small density bump, and its collapse is followed until a steady state has been reached.
R. H. Miller, B. F. Smith
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