Results 121 to 130 of about 184,560 (234)
The impact of bars and interactions on optically selected AGNs in spiral galaxies
, 2018 Aims. With the aim of performing a suitable comparison of the internal process of galactic bars with respect to the external effect of interactions on driving gas toward the inner most region of the galaxies, we explored the efficiency of both mechanisms
Alonso, Sol +4 more
core +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
Is NGC 4631 a barred spiral galaxy?
The Astronomical Journal, 1991 High- and low-dispersion optical spectra of the giant H II region CM 67 near the center of the edge-on galaxy NGC 4631 have been obtained. Comparisons are made with radio observations to suggest the existence of a large bar in NGC 4631. Region CM 67 is shown to coincide in position with the easternmost peak of a triple radio-continuum source.
Jianguo Wang +2 more
openaire +2 more sources
The effects of bar–spiral coupling on stellar kinematics in the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 13 pages, 12 figures. MNRAS. Accepted for publication.
Giacomo Monari +6 more
openaire +6 more sources
Rings and spiral arms: are they coupled with bars? [PDF]
Proceedings of the International Astronomical Union (S355), 2020, 2019 Rings and spiral arms are distinctive features of many galaxies, and their properties are closely related to the disk dynamics. They are often associated to stellar bars, but the details of this connection are far from clear. We study the pitch angles of spiral arms and the frequency and dimensions of inner and outer rings as a function of disk ...
arxiv
Do Strong Bars Exhibit Strong Noncircular Motions?
The Astrophysical JournalGalactic bars induce characteristic motions deviating from pure circular rotation, known as noncircular motions. As bars are nonaxisymmetric structures, stronger bars are expected to show stronger noncircular motions.
Taehyun Kim +6 more
doaj +1 more source
Stellar Populations, Bars and Secular Evolution in Late-Type Galaxies [PDF]
, 2000 We have done a robust statistical analysis of UBV color profiles of 257 Sbc barred and unbarred galaxies. We found that there is an excess of barred galaxies among the objects with null or positive (bluish inward) color gradients, which seems to indicate
Corsini, Enrico Maria +3 more
core +1 more source
Molecular Gas in the Edge-On Galaxy NGC 4013 [PDF]
, 2004 Our OVRO observations at 300 pc resolution of the molecular gas disk in the edge-on spiral galaxy NGC 4013 show no evidence for extraplanar material at our sensitivity limit.
Rand, R. J. +2 more
core +1 more source
Stellar Populations in the Barred Spiral Galaxy NGC 4900 [PDF]
, 2010 We present OASIS observations obtained at the Canada-France-Hawaii Telescope for the SB(rs)c galaxy NGC 4900. About 800 spectra in the wavelength range 4700-5500 AA and 6270- 7000 AA have been collected with a spatial resolution of ~50 pc. This galaxy is
S. Cantin +3 more
semanticscholar +1 more source
Surface photometry of barred spiral galaxies
The Astrophysical Journal, 1990 La photometrie de surface detaillee a ete realisee pour 6 galaxies spirales barrees de premier type en utilisant des plaques photographiques a haute resolution. Les observations et les reductions des donnees sont presentees et les profils azimutaux de la luminosite sont extraits et analyses.
Ken-Ichi Wakamatsu +2 more
openaire +2 more sources