Results 111 to 120 of about 8,504 (230)

Dynamical Mechanism of Episodic Gas Accretion to the Central Region of Spiral Galaxies

The Astrophysical Journal
We performed N -body/smoothed particle hydrodynamics simulations of isolated spiral galaxies with various bulge-to-disk mass ratios ( M _bulge / M _disk ) from 0.02 to 0.2 to investigate mass transport from galactic scales (10 kpc) down to circumnuclear ...
Naomichi Yutani, Nozomu Kawakatu, Takayuki Saitoh, Keiichi Wada   +3 more
doaj   +1 more source

An Optimal Strategy for Accurate Bulge-to-disk Decomposition of Disk Galaxies

, 2017
The development of two-dimensional (2D) bulge-to-disk decomposition techniques has shown their advantages over traditional one-dimensional (1D) techniques, especially for galaxies with non-axisymmetric features.
Gao, Hua, Ho, Luis C.
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 two-phase formation history of spiral galaxies traced by the cosmic evolution of the bar fraction

, 2012
We study the evolution of galactic bars and the link with disk and spheroid formation in a sample of zoom-in cosmological simulations. Our simulation sample focuses on galaxies with present-day stellar masses in the 10^10-10^11 Msun range, in field and ...
Aguerri, Athanassoula, Barazza, Berentzen, Bournaud, Bournaud, Bournaud, Bournaud, Bureau, Chiappini, Combes, Combes, Dalcanton, de Vaucouleurs, Debattista, Elmegreen, Elmegreen, Elmegreen, Elmegreen, Eskridge, Fisher, Friedli, Frédéric Bournaud, Gerin, Gilmore, Heller, Jogee, Katarina Kraljic, Kennicutt, Knapen, Laine, Laurikainen, Lee, Maiolino, Marie Martig, Martig, Martig, Martig, Martinez-Valpuesta, Menéndez-Delmestre, Miwa, Peng, Peng, Pfenniger, Robertson, Sargent, Sellwood, Seth, Shen, Sheth, Sheth, Sérsic, Teyssier, van den Bergh, Weinberg, Yoachim, Zoccali   +56 more
core   +3 more sources

Inner Workings: Astronomers are redrawing our corner of the Milky Way. [PDF]

Proc Natl Acad Sci U S A, 2021
Croswell K.
europepmc   +1 more source

Astronomia ex machina: a history, primer and outlook on neural networks in astronomy. [PDF]

R Soc Open Sci, 2023
Smith MJ, Geach JE.
europepmc   +1 more source

Supernovae and their host galaxies - II. The relative frequencies of supernovae types in spirals

, 2014
We present an analysis of the relative frequencies of different supernova (SN) types in spirals with various morphologies and in barred or unbarred galaxies.
Adibekyan, V. Zh., Aramyan, L. S., Bertin, E., de Lapparent, V., Gomes, J. M., Hakobyan, A. A., Kunth, D., Mamon, G. A., Nazaryan, T. A., Petrosian, A. R., Turatto, M.   +10 more
core   +2 more sources

Structure and dynamics of barred spiral galaxies with an asymmetric mass distribution [PDF]

, 1970
G. de Vaucouleurs, K. C. Freeman
openalex   +1 more source

Conditions for Bar Formation in Bulgeless Disk Galaxies

The Astrophysical Journal
While bars are commonly observed in disk galaxies, the precise conditions governing their formation remain incompletely understood. To investigate these conditions, we perform a suite of N -body simulations of bulgeless disk galaxies with stellar masses ...
Dajeong Jang, Woong-Tae Kim, Yun Hee Lee
doaj   +1 more source

Inner Molecular Rings in Barred Galaxies: BIMA SONG CO Observations

, 2002
Although inner star-forming rings are common in optical images of barred spiral galaxies, observational evidence for the accompanying molecular gas has been scarce.
Buta R., Combes F., Kartik Sheth, Krause M., Michael W. Regan, Peter J, Schwarz M. P., Stuart N. Vogel, Teuben, , van der Kruit P.   +9 more
core   +1 more source