Results 51 to 60 of about 466,777 (152)
Properties of bars in the local universe
, 2008 We studied the fraction and properties of bars in a sample of about 3000 galaxies extracted from SDSS-DR5. This represents a volume limited sample with galaxies located between redshift 0.01-20, and inclination i < 60°. Interacting galaxies were excluded
MÉNDEZ ABREU J. +2 more
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Galactic bars and active galactic nucleus fuelling in the second half of cosmic history
Astronomy & AstrophysicsWe investigate the role of galactic bars in fuelling and triggering active galactic nuclei (AGN) in disc galaxies up to z ∼ 0.8. We utilised a deep learning model, fine-tuned on Galaxy Zoo volunteer classifications, to identify (strongly and weakly ...
La Marca A. +5 more
doaj +1 more source
The Astrophysical Journal LettersUsing numerical simulations of a barred disk galaxy embedded in nonspinning and spinning dark matter (DM) halos, we present a novel mechanism of “cooling” the vertical oscillations of DM particles, which acquire disk kinematics.
Xingchen Li +3 more
doaj +1 more source
The Astrophysical JournalGalactic bars can form via the internal bar instability or external tidal perturbations by other galaxies. We systematically compare the properties of the bars formed through the two mechanisms with a series of controlled N -body simulations that form ...
Yirui Zheng, Juntai Shen
doaj +1 more source
Coevolution of Bar and Spiral Arms in TNG50 Simulations Using Information Theory
The Astrophysical JournalUsing Information Theory, we investigate the coevolution of bars and spiral arms in barred-spiral galaxies from the cosmological magnetohydrodynamic Illustris TNG50 simulations. We first calculate Mutual Information (MI) between a structural or kinematic
Anagha A G, Arunima Banerjee
doaj +1 more source
Lap splices of bars in bundles [PDF]
, 2013 European (EC2) and ACI 318-08 design code rules for lap splicesof reinforcing bars within a bundle differ markedly—the formerpermits the same or shorter lap-splice lengths with respect tosplices of individual bars, while the latter requires longer laps ...
Cairns, John
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Are Purely Gaseous Bars in Dwarf Irregulars a Myth?
The Astrophysical JournalAbout two-thirds of galactic disks exhibit a central ellipsoidal stellar component called the bar, with or without a gaseous counterpart. However, there are a few dwarf galaxies with purely gaseous bars: NGC 3741, NGC 2915, and DDO 168. This is a puzzle,
Anagha A. G., Arunima Banerjee
doaj +1 more source
Boxy/Peanut Bulges: Comparative Analysis of EGIPS Galaxies and TNG50 Models
GalaxiesWe investigated the properties of boxy/peanut-shaped (B/PS) bulges in a sample of 71 galaxies from the Edge-on Galaxies in the Pan-STARRS Survey (EGIPS) and 20 simulated galaxies from Illustris TNG50 using multicomponent photometric decomposition.
Anton Smirnov +4 more
doaj +1 more source
MASS SUPPLY TO GALACTIC CENTER DUE TO NESTED BARS IN THE GALAXY [PDF]
, 2009 We investigate a rapid mass supply process by nested bars in the Galaxy by numerical simulation. We simulate gas flow in the whole Galaxy disk with nested bars, which are the outer bar and the inner bar, with a high spatial resolution in the Galactic ...
Habe, Asao +3 more
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Experimental response of RC columns built with plain bars under unidirectional cyclic loading [PDF]
, 2012 A large number of existing reinforced concrete (RC) buildings structures were designed and built before mid-70’s, when the reinforcing bars had plain surface and prior to the enforcement of the modern seismic-oriented design philosophies.
Costa, A. +3 more
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