Results 71 to 80 of about 64,819 (265)
Testing Noncommutativity-Like Model as a Galactic Density Profile
Galaxies, 2021 Noncommutative-like model (NC-like) is an interesting alternative inspired by string theory to understand and describe the velocity rotation curves of galaxies without the inclusion of dark matter particles.
Juan Jordi Ancona-Flores +2 more
doaj +1 more source
Central Rotation Curves of Spiral Galaxies [PDF]
The Astrophysical Journal, 1999 We present high-resolution central-to-outer rotation curves for Sb, SBb, Sc, and SBc galaxies. We discuss their general characteristics, particularly their central behavior, as well as dependencies on morphological types, activity, and peculiarity. The rotation curves generally show a steep nuclear rise, and high-velocity central rotation, followed by ...
Sofue, Y. +6 more
openaire +2 more sources
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, EarlyView.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source
Are the Galaxies with Indefinitely Flat Circular Velocities Located Inside Large Dark Matter Haloes?
UniverseA recent study using weak gravitational lensing revealed that the rotation curves of some isolated galaxies are found at a very large distance from their galactic centres. This may provide strong evidence supporting Modified Newtonian Dynamics (MOND) and
Man Ho Chan +2 more
doaj +1 more source
A Data Driven Solution to the Dark Matter Problem
ACI Avances en Ciencias e Ingenierías, 2023 A data driven solution to the dark matter problem is presented. This short and self-contained overview is intended for a wide audience, with full technical details available in the cited references.
Bruce Hoeneisen
doaj +1 more source
Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
Astronomische Nachrichten, EarlyView.ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón +4 more
wiley +1 more source
The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics
The Astrophysical JournalThe Sloan Digital Sky Survey-IV/Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy ...
Brian DiGiorgio Zanger +9 more
doaj +1 more source
The Circular Velocity Curve of the Milky Way from 5–25 kpc Using Luminous Red Giant Branch Stars
The Astrophysical Journal, 2023 We present a sample of 254,882 luminous red giant branch (LRGB) stars selected from the APOGEE and LAMOST surveys. By combining photometric and astrometric information from the Two Micron All Sky Survey and Gaia survey, the precise distances of the ...
Yuan Zhou +3 more
doaj +1 more source
Limnology and Oceanography: Methods, EarlyView.Abstract Benthic incubation chambers enclose a known volume of water overlying a known area to measure water chemistry changes and are typically used to quantify the metabolic activity of benthic organisms or communities. Here we present an economical benthic incubation chamber for shallow, low‐flow environments, built using off‐the‐shelf components ...
Luke D. Groff +2 more
wiley +1 more source
Observational Tests of Nonlocal Gravity: Galaxy Rotation Curves and Clusters of Galaxies [PDF]
, 2014 aspect of gravity in this theory can simulate dark matter; indeed, in the Newtonian regime of nonlocal gravity, we recover the phenomenological Tohline-Kuhn approach to modified gravity.
S. Rahvar, B. Mashhoon
semanticscholar +1 more source