Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jrasc..84...60v&link_type=abstract
Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 84, April 1990, p. 60-69.
Astronomy and Astrophysics
Astrophysics
11
Galactic Evolution, Galactic Structure, Globular Clusters, Halos, Star Formation, Chronology, Mass To Light Ratios, Nuclear Fusion, Supernovae, White Dwarf Stars
Scientific paper
Various scenarios for the evolution of the Galaxy were reviewed at the recent 'Kingston' meeting held at the Dominion Astrophysical Observatory. Although no consensus was reached, it appears that the 1962 Eggen-Lynden-Bell-Sandage (ELS) model still provides a surprisingly good framework within which the evolution of the Galaxy can be studied. The following modifications to the original ELS scenario do, however, appear to be necessary: (1) before its collapse, the proto-Galaxy must have been both clumpy and highly turbulent; (2) merger with satellite galaxies appears to be needed to account for some of the properties of the (outer?) halo of the Galaxy; and (3) the collapse timescale must have been much longer in the low-density outer parts of the proto-Galaxy than it was in its dense inner regions. Globular cluster ages are mostly found to lie in the range 12-16 billion years (Gyr), whereas the oldest open clusters and white dwarfs near the sun seem to indicate an age of less than about 10 Gyr for the Galactic disk.
No associations
LandOfFree
Age and evolution of the Galactic disk and halo 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 Age and evolution of the Galactic disk and halo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Age and evolution of the Galactic disk and halo will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1382202