Results 31 to 40 of about 154,367 (172)
Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds [PDF]
, 2022 Observations and simulations of barred spiral galaxies have shown that, in general, the spiral arms rotate at a different pattern speed to that of the bar. The main conclusion from the bibliography is that the bar rotates faster than the spiral arms with a double or even a triple value of angular velocity.
arxiv +1 more source
Bar pattern speeds in CALIFA galaxies III. Solving the puzzle of ultrafast bars [PDF]
A&A 649, A30 (2021), 2021 More than 10% of the barred galaxies with a direct measurement of the bar pattern speed host an ultrafast bar. These bars extend beyond the corotation radius and challenge our understanding of the orbital structure of barred galaxies. Most of them are found in spiral galaxies, rather than in lenticular ones.
arxiv +1 more source
AGN spiral galaxies in groups: effects of bars [PDF]
Astronomy & Astrophysics, 2014 10 pages, 10 figures.
Sol Alonso +6 more
openaire +4 more sources
GASP. XLV. Stellar Bars in Jellyfish Galaxies: Analysis of Ionized Gas and Stellar Populations
The Astrophysical Journal, 2023 Stellar bars have been found to substantially influence the properties of stellar populations in galaxies, affecting their ability to form stars. While this can be easily seen when studying galaxies in relatively isolated environments, such type of ...
Osbaldo Sánchez-García +9 more
doaj +1 more source
International Journal of Engineering and Management Sciences, 2018 Recently, it has been suggested that entangled particles may be connected by a wormhole. If that is right, what is the distance between them we have to take into account when applying Newton's law of universal gravitation to these particles?
Sándor Buglyó
doaj +1 more source
How the bar properties affect the induced spiral structure [PDF]
, 2021 Stellar bars and spiral arms co-exist and co-evolve in most disc galaxies in the local Universe. However, the physical nature of this interaction remains a matter of debate. In this work, we present a set of numerical simulations based on isolated galactic models aimed to explore how the bar properties affect the induced spiral structure.
arxiv +1 more source
TESTING THEORIES IN BARRED-SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2011 According to one version of the recently proposed "manifold" theory that explains the origin of spirals and rings in relation to chaotic orbits, galaxies with stronger bars should have a higher spiral arms pitch angle when compared to galaxies with weaker bars.
openaire +3 more sources
Mechanisms based on chaotic flows that support structures in barred-spiral systems
EPJ Web of Conferences, 2012 I summarize the dynamical mechanisms that have been found to shape structures such as the spirals and the bars in barred-spiral systems. Response models and orbital analysis are used to study the dynamics in potentials estimated from near-infrared images
Patsis P.A.
doaj +1 more source
The Astrophysical Journal Letters, 2023 A primary new capability of JWST is the ability to penetrate the dust in star-forming galaxies to identify and study the properties of young star clusters that remain embedded in dust and gas. In this Letter we combine new infrared images taken with JWST
Bradley C. Whitmore +30 more
doaj +1 more source
First Look at z > 1 Bars in the Rest-frame Near-infrared with JWST Early CEERS Imaging
The Astrophysical Journal Letters, 2023 Stellar bars are key drivers of secular evolution in galaxies and can be effectively studied using rest-frame near-infrared (NIR) images, which trace the underlying stellar mass and are less impacted by dust and star formation than rest-frame UV or ...
Yuchen Guo +47 more
doaj +1 more source