Results 111 to 120 of about 106,851 (294)
Testing dark matter and geometry sustained circular velocities in the Milky Way with Gaia DR2 [PDF]
, 2019 Flat rotation curves in disk galaxies represent the main evidence for large amounts of surrounding dark matter. Despite of the difficulty in identifying the dark matter contribution to the total mass density in our Galaxy, stellar kinematics, as tracer ...
Crosta, Mariateresa +3 more
core +2 more sources
Milky Way rotation curve from proper motions of red clump giants [PDF]
, 2014 We derive the stellar rotation curve of the Galaxy in the range of Galactocentric radii of R=4-16 kpc at different vertical heights from the Galactic plane of z between -2 and +2 kpc.
M. López-Corredoira
semanticscholar +1 more source
Oscillating Cosmological Force Modifies Newtonian Dynamics
Galaxies, 2020 In the Newtonian limit of general relativity a force acting on a test mass in a central gravitational field is conventionally defined by the attractive Newtonian gravity (inverse square) term plus a small repulsive cosmological force, which is ...
Igor I. Smolyaninov
doaj +1 more source
Extended HI Rotation Curve and Mass Distribution of M31
, 2006 New HI observations of Messier 31 (M31) obtained with the Effelsberg and Green Bank 100-m telescopes make it possible to measure the rotation curve of that galaxy out to ~35 kpc.
Begeman K. G. +19 more
core +2 more sources
Heat Transfer, EarlyView.ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey +3 more
wiley +1 more source
Galaxy rotation curves and dissipation
The Astrophysical Journal, 1989 Une theorie est proposee pour expliquer la tendance des galaxies a disque a manifester des vitesses rotationnelles constantes en considerant l'hypothese suivant laquelle la dissipation d'energie est le facteur principal qui determine les formes finales des galaxies a disque.
openaire +1 more source
On the Rotation Curve of Disk Galaxies in General Relativity
The Astrophysical Journal, 2022 Abstract Recently, it has been suggested that the phenomenology of flat rotation curves observed at large radii in the equatorial plane of disk galaxies can be explained as a manifestation of general relativity (GR) instead of the effect of dark matter (DM) halos.
openaire +3 more sources
Revisiting Galactic Disk and Spiral Arms Using Open Clusters
The Astronomical Journal, 2023 We use the largest catalog of open clusters in the post-Gaia era to provide an observational view of the Galactic disk. By compiling physical parameters such as age, distance, and kinematic information, we investigate the spatial distribution of open ...
Yogesh C. Joshi, Sagar Malhotra
doaj +1 more source
Prioritized Real‐Time UAV‐Based Vessel Detection for Efficient Maritime Search
Journal of Field Robotics, EarlyView.ABSTRACT Real‐time vessel detection in maritime environments is crucial for diverse applications requiring speed and accuracy. Static camera views often introduce blind spots, compromising detection efficiency. This paper proposes a novel, real‐time UAV‐based system that uses a dynamic camera control strategy to address this limitation.
Lyes Saad Saoud +6 more
wiley +1 more source
Dynamics of Molecular Gas in the Central Region of the Quasar I Zwicky 1
The Astrophysical Journal, 2023 We present a study of the molecular gas distribution and kinematics in the cicumnuclear region (radii ≲2 kpc) of the z ≈ 0.061 quasar I Zwicky 1 using a collection of available Atacama Large Millimeter/submillimeter Array observations of the carbon ...
Qinyue Fei +6 more
doaj +1 more source