Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasj...61..441h&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.61, No.3, pp.441--450
Astronomy and Astrophysics
Astronomy
1
Galaxies: Bar, Galaxies: Fundamental Parameters, Galaxies: Individual (Ngc 2903, Ngc 3627, M 83), Galaxies: Kinematics And Dynamics, Ism: Molecules, Methods: Numerical
Scientific paper
We evaluated the availability of a method proposed by Kuno et al. (2000, PASJ, 52, 775) for measuring the pattern speed of barred galaxies, and applied it to observational data. We made error estimations using a hydrodynamical galaxy model to test the validity of the method. Error estimations suggest that the method is able to determine the pattern speed within an error of 10%--20%. The method was applied to 12CO(1--0) data of three late-type barred galaxies: NGC 2903, M 83, and NGC 3627. The derived pattern speed was 40km s-1 kpc-1 for NGC 2903, 57km s-1 kpc-1 for M 83, 39km s-1 kpc-1 for NGC 3627, respectively. For the sake of a comparison with measurements in other galaxies, we used the distance-independent value R (≡ RCR/Rbar), and found that bars in the three late-type spirals are ``slow'' (R > 1.4). Our results support recent claims that bars are not always ``fast'' (R ≤ 1.4), at least for late-type spiral galaxies.
Habe Asao
Hirota Akihiko
Kuno Nario
Matsui Hidenori
Nakanishi Hiroyuki
No associations
LandOfFree
Determination of the Pattern Speed of Barred Spiral Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Determination of the Pattern Speed of Barred Spiral Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the Pattern Speed of Barred Spiral Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1644113