Results 131 to 140 of about 184,560 (234)

Morphological Evolution of Disk Galaxies and Their Concentration, Asymmetry, and Clumpiness (CAS) Properties in Simulations across Toomre’s Q Parameter

The Astrophysical Journal
We investigate the morphological and structural evolution of disk galaxies in simulations for a wide range of Toomre’s Q parameters. In addition to the inspection of conventional bar modes, we compute the concentration, asymmetry, and clumpiness (CAS ...
T. Chantavat, S. Yuma, P. Malelohit, T. Worrakitpoonpon   +3 more
doaj   +1 more source

The morphology of the stars, atomic gas, and ionized gas in the barred spiral galaxy NGC 1530

, 1996
We present observations of the barred spiral galaxy NGC 1530 that we use to investigate the overall structure and gas content of the galaxy. We use sensitive H alpha Fabry-Perot observations of the ionized gas to determine the star forming rates in ...
M. Regan, P. Teuben, T. Vanderhulst
semanticscholar   +1 more source

Reexamination of the Radial Abundance Gradient Break in NGC 3359

, 2011
In this contribution, we reexamine the radial oxygen abundance gradient in the strongly barred spiral galaxy NGC 3359, for which, using an imaging spectrophotometric technique, Martin & Roy detected a break near the effective radius of the galaxy.
Alloin, Bresolin, Combes, Considère, Das, de Vaucouleurs, Dutil, Dutil, Eskridge, F. Bresolin, Friedli, Friedli, Garnett, H. J. Zahid, Hummer, Kashikawa, Kewley, Kewley, Kobulnicky, Marinova, Menéndez-Delmestre, Pagel, Pfenniger, Roy, Rozas, Sheth, van Zee, Vila-Costas   +27 more
core   +1 more source

The Impact of Bar-induced Noncircular Motions on the Measurement of Galactic Rotation Curves

The Astrophysical Journal
We study the impact of bar-induced noncircular motions on the derivation of galactic rotation curves (RCs) using hydrodynamic simulations and observational data from the PHANGS-ALMA survey.
Jie Liu, Zhi Li, Juntai Shen
doaj   +1 more source

The relation between dynamics and star formation in barred galaxies [PDF]

, 2011
We analyze optical and near-infrared data of a sample of 11 barred spiral galaxies, in order to establish a connection between star formation and bar/spiral dynamics. We find that 22 regions located in the bars, and 20 regions in the spiral arms beyond the end of the bar present azimuthal color/age gradients that may be attributed to star formation ...
arxiv   +1 more source

The Bar Pattern Speed of NGC 1433 Estimated Via Sticky-Particle Simulations

, 2008
We present detailed numerical simulations of NGC 1433, an intermediate-type barred spiral showing strong morphological features including a secondary bar, nuclear ring, inner ring, outer pseudoring, and two striking, detached spiral arcs known as ...
Bajaja, Begeman, Block, Buta, Buta, Buta, Buta, Buta, Buta, Buta, Contopoulos, H. Salo, Kalnajs, Lütticke, P. Rautiainen, P. Treuthardt, Persic, R. Buta, Rautiainen, Rautiainen, Salo, Salo, Salo, Schwarz, Warner, Zhang   +25 more
core   +1 more source

Variation of Bar Strength with Central Velocity Dispersion in Spiral Galaxies

, 2008
We investigate the variation of bar strength with central velocity dispersion in a sample of barred spiral galaxies. The bar strength is characterized by $Q_g$, the maximal tangential perturbation associated with the bar, normalized by the mean ...
B.G. Elmegreen, B.G. Elmegreen, C.A. Norman, D. Batcheldor, D. Friedli, D. Friedli, E. Athanassoula, E. Athanassoula, E. Laurikainen, E. Laurikainen, E. Laurikainen, E. Laurikainen, E. Laurikainen, E.D. Feigelson, F. Bournaud, F. Bournaud, F.K.B. Barbosa, G. Vaucouleurs de, H. Hasan, H. Hasan, H. Salo, H. Salo, I. Berentzen, I. Berentzen, I. Jorgensen, I. Martinez-Valpuesta, J. Falcón-Barroso, J. Kormendy, J. Shen, K. Ganda, K. Gebhardt, K. Sakamoto, K. Sheth, K. Sheth, K. Sheth, L. Ferrarese, L. Ferrarese, M. Das, M. Das, N. Raha, P.T. Zeeuw de, R. Buta, R. Buta, R. Grijs de, R.F. Peletier, R.M. Gonzalez Delgado, S. Hozumi, S. Jogee, V.P. Debattista, W.E. Baggett   +49 more
core   +1 more source

Gas flow in the barred spiral galaxy NGC 5383

, 1978
Line-of-sight gas velocities calculated from a numerical hydrodynamical model of a barred spiral galaxy are compared with the observations and models made by Peterson, Rubin, Ford, and Thonnard of the gas flow in NGC 5383.
J. M. Huntley
semanticscholar   +1 more source

Properties of bars in the local universe [PDF]

arXiv, 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 from the sample. The fraction of barred galaxies in our sample is 45%.
arxiv  

Barred spiral galaxy NGC 3992: Does it have a massive halo

, 1982
We present new high-resolution H I observations of the barred spiral galaxy NGC 3992 and three nearby satellite systems. These data are employed to estimate the mass and mass distribution of NGC 3992.
S. Gottesman, J. Hunter
semanticscholar   +1 more source