Query : 2018A&A...612A..75B

2018A&A...612A..75B - Astronomy and Astrophysics, volume 612A, 75-75 (2018/4-1)

Collisionless Boltzmann equation approach for the study of stellar discs within barred galaxies.


Abstract (from CDS):

We have studied the kinematics of stellar disc populations within the solar neighbourhood in order to find the imprints of the Galactic bar. We carried out the analysis by developing a numerical resolution of the 2D2V (two-dimensional in the physical space, 2D, and two-dimensional in the velocity motion, 2V) collisionless Boltzmann equation and modelling the stellar motions within the plane of the Galaxy within the solar neighbourhood. We recover similar results to those obtained by other authors using N-body simulations, but we are also able to numerically identify faint structures thanks to the cancelling of the Poisson noise. We find that the ratio of the bar pattern speed to the local circular frequency is in the range ΩB/Ω=1.77 to 1.91. If the Galactic bar angle orientation is within the range from 24 to 45 degrees, the bar pattern speed is between 46 and 49km/s/kpc.

Abstract Copyright: © ESO 2018

Journal keyword(s): methods: numerical - galaxies: kinematics and dynamics - solar neighborhood

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NAME Gal Anticenter reg 05 46 +28.9           ~ 827 0
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13204 0
3 NAME Galactic Bar reg ~ ~           ~ 1079 0
4 NAME Hercules Stream MGr ~ ~           ~ 215 0

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