Mathematics – Logic
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..350s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 2, p. 350-358.
Mathematics
Logic
17
Astronomical Models, Galactic Evolution, Galactic Structure, Milky Way Galaxy, Solar Neighborhood, Galactic Halos, Late Stars, Star Formation
Scientific paper
Models of the formation, evolution and structure of the solar cylinder are constructed on the basis of a large set of observational data on mainly late-type stars. Star formation in the disk is modelled with a simple, phenomenological prescription of the Schmidt type. The results obtained are largely independent of the star formation prescription. For the best-fitting model (N = 1), the age of the solar cylinder and the upper limit to the local disk dark matter fraction are determined. The old disk and the thick disk are discrete components, with a transition between them occurring about 8 Gyr ago at a metallicity Fe/H = -0.6. The star formation rate has been roughly constant over the lifetime of the solar cylinder, and the massive halo of our Galaxy is quite round. In conjunction with the Galaxy formation theory of Sommer-Larsen (1991), the present work indicates that the age of the metal-weak halo is 14 +/- 1 Gyr. This is in agreement with recent estimates of the absolute ages of metal-weak Galactic globular clusters. The infall time-scale derived in the present work is in reasonable agreement with the one predicted by the Sommer-Larsen Galaxy formation theory.
Antonuccio-Delogu Vincenzo
Sommer-Larsen Jesper
No associations
LandOfFree
A model for the formation, evolution and structure of the solar cylinder 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 A model for the formation, evolution and structure of the solar cylinder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A model for the formation, evolution and structure of the solar cylinder will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1682470