Self-consistent dynamical model of the vertical disk profile in the solar vicinity

Details Self-consistent dynamical model of the vertical disk profile in the solar vicinity Self-consistent dynamical model of the vertical disk profile in the solar vicinity

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998egdg.conf..119j&link_type=abstract

"Dynamics of Galaxies and Galactic Nuclei, An International Workshop of the SFB 328 "Evolution of Galaxies" held at the ITA Nove

Computer Science

1

Scientific paper

The star formation rate history and the dynamical heating of the stellar populations determine the vertical density profile and the age distribution of the disk stars. The local velocity distribution f(W) of the stars is strongly coupled to the density profile. Due to their smaller scale height the relative contribution of young stars is enhanced resulting in stronger signatures of the dynamical evolution of the disk in the shape of f(W). For different star formation rates SFR and adopted dynamical heating functions we derive self-consistent vertical density profiles including the gravitational potential of the gas component and the metallicity dependent life times of the stars. From a comparison of the local velocity distribution of the stars with observations we find that the density profile shows a central flattening of a factor of 2 compared to an exponential one. This leads to a local total mass density of 0.115 Modot/pc^3 and a surface density of 102 Modot/pc^2 up to 2kpc using a scale height of 250 pc. The DM-Halo with a local density of 0.01 Modot/pc^3 contributes 50% to that surface density. We find also constraints on the overall shape of the SFR.

Affiliated with

Also associated with

No associations

Rating

Self-consistent dynamical model of the vertical disk profile in the solar vicinity 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 Self-consistent dynamical model of the vertical disk profile in the solar vicinity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-consistent dynamical model of the vertical disk profile in the solar vicinity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1344905