Results 41 to 50 of about 8,434 (230)

Zoom-in cosmological hydrodynamical simulation of a star-forming barred, spiral galaxy at redshift z=2 [PDF]

, 2019
Accepted for publication in MNRASWe present gas and stellar kinematics of a high-resolution zoom-in cosmological chemodynamical simulation, which fortuitously captures the formation and evolution of a star-forming barred spiral galaxy, from redshift $z ...
Kobayashi, Chiaki, Vincenzo, Fiorenzo, Yuan, Tiantian   +2 more
core   +5 more sources

On the Link Between Central Black Holes, Bar Dynamics, and Dark Matter Halos in Spiral Galaxies [PDF]

, 2011
The discovery of a relationship between supermassive black hole (SMBH) mass and spiral arm pitch angle (P) is evidence that SMBHs are tied to the overall secular evolution of a galaxy.
Amber D. Sierra, Athanassoula, Athanassoula, Athanassoula, Bandara, Bell, Bell, Block, Booth, Buta, Buta, Buta, Buta, Byrd, Canzian, Catinella, Cisternas, Claud H. S. Lacy, Considère, Contopoulos, Daniel Kennefick, Das, Davis, de Grijs, de Vaucouleurs, Debattista, Egusa, Ferrarese, Ferrarese, Garcia, Garcia-Gomez, Gebhardt, Gebhardt, Grouchy, Heikki Salo, Ho, Ho, Hubble, Ismaeel Al-Baidhany, Jogee, Julia Kennefick, Kalnajs, Kennicutt, Kormendy, Kormendy, Laurikainen, Laurikainen, Laurikainen, Laurikainen, Lin, Lynden Bell, Marc S. Seigar, Mathewson, Merlin, Márquez, Orban de Xivry, Patrick Treuthardt, Paturel, Persic, Puerari, Rautiainen, Rautiainen, Ringermacher, Roberts, Salo, Salo, Satyapal, Satyapal, Schröder, Schwarz, Seigar, Seigar, Seigar, Seigar, Seigar, Seigar, Sheth, Tremaine, Treuthardt, van den Bosch, Volonteri, Weiner   +81 more
core   +1 more source

Diffusion in barred-spiral galaxies

, 2010
We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation ...
Brunetti, Maura, Chiappini, Cristina, Pfenniger, Daniel   +2 more
openaire   +3 more sources

Effect of bars on the galaxy properties

, 2016
Aims: With the aim of assessing the effects of bars on disc galaxy properties, we present an analysis of different characteristics of spiral galaxies with strong, weak and without bars.
Alonso, Sol, Coldwell, Georgina, Vera, Matias   +2 more
core   +1 more source

Bar-driven Transport of Molecular Gas to Galactic Centers and Its Consequences [PDF]

, 1999
We study the characteristics of molecular gas in the central regions of spiral galaxies on the basis of our CO(J=1-0) imaging survey of 20 nearby spiral galaxies using the NRO and OVRO millimeter arrays. Condensations of molecular gas at galactic centers
Arimoto N., Bloemen J. B. G. M., Buat V., Casoli F., Dahmen G., Friedli D., Friedli D., Hawarden T. G., Huang J. H., Hummel E., K. Sakamoto, N. Z. Scoville, Noguchi M., S. Ishizuki, S. K. Okumura, Safronov V. S., Sakamoto K., Vila-Costas M. B., Wada K.   +18 more
core   +3 more sources

Nobeyama CO Atlas of Nearby Spiral Galaxies: Distribution of Molecular Gas in Barred and Nonbarred Spiral Galaxies [PDF]

Publications of the Astronomical Society of Japan, 2007
Abstract The data from a CO ($J$ = 1–0) mapping survey of 40 nearby spiral galaxies, performed with the Nobeyama 45 m telescope, are presented. The criteria of the sample selection were: (1) RC3 morphological type ranging from Sa to Scd, (2) distance of less than 25 Mpc, (3) inclination angle less than 79$^{\circ}$ (RC3), (4) flux at 100$
Hiroyuki Nakanishi, Tomoka Tosaki, Y. Shioya, N. Kuno, Naoko Sato, Kazuo Sorai, Kota Nishiyama, Naomasa Nakai, Akihiko Hirota, Baltasar Vila-Vilaro   +9 more
openaire   +3 more sources

Forces Attributed to Dark Matter May Originate from Entangled Particles as Seen in the Shape Of Galaxies Formed by Grbs

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

Chaotic Spiral Galaxies

, 2011
We study the role of asymptotic curves in supporting the spiral structure of a N-body model simulating a barred spiral galaxy. Chaotic orbits with initial conditions on the unstable asymptotic curves of the main unstable periodic orbits follow the shape ...
Contopoulos, George, Harsoula, Mirella
core   +1 more source

Formation of the spiral structure in SB galaxies [PDF]

Astronomy Letters, 2001
We consider a scenario of formation of the spiral structure in barred galaxies. This scenario includes the new non-resonant mechanism of elongation of spirals, due to the characteristic behaviour of the gravitational potential beyond the principal spiral arms.
Evgenii V. Polyachenko, Valerij L. Polyachenko   +1 more
openaire   +3 more sources

Spirals and Rings in Barred Galaxies by the ROTASE Model

International Journal of Physics, 2021
This paper extends the application of the ROTASE model for the formation of spiral arms of disc galaxies, questions and confusions from readers about this model are addressed. The optical trail effect behind the spiral arm rotation is the natural consequence of the model.
openaire   +4 more sources