Large-scale collective motion of RFGC galaxies

Details Large-scale collective motion of RFGC galaxies Large-scale collective motion of RFGC galaxies

2009-10-24

arxiv.org/abs/0910.4640v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in Astrophysics and Space Science

Scientific paper

10.1007/s10509-009-0176-6

We processed the data about radial velocities and HI linewidths for 1678 flat edge-on spirals from the Revised Flat Galaxy Catalogue. We obtained the parameters of the multipole components of large-scale velocity field of collective non-Hubble galaxy motion as well as the parameters of the generalized Tully-Fisher relationship in the "HI line width - linear diameter" version. All the calculations were performed independently in the framework of three models, where the multipole decomposition of the galaxy velocity field was limited to a dipole, quadrupole and octopole terms respectively. We showed that both the quadrupole and the octopole components are statistically significant. On the basis of the compiled list of peculiar velocities of 1623 galaxies we obtained the estimations of cosmological parameters Omega_m and sigma_8. This estimation is obtained in both graphical form and as a constraint of the value S_8=sigma_8(Omega_m/0.3)^0.35 = 0.91 +/- 0.05.

Affiliated with

Also associated with

No associations

Rating

Large-scale collective motion of RFGC 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 Large-scale collective motion of RFGC galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-scale collective motion of RFGC galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-211679