Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247..261f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 2, July 1991, p. 261-268.
Astronomy and Astrophysics
Astrophysics
3
Galactic Evolution, Globular Clusters, Halos, Milky Way Galaxy, Stellar Evolution, Variable Stars, Hertzsprung-Russell Diagram, Stellar Luminosity, Stellar Mass Accretion
Scientific paper
Hypothetical particles called halons - massive elementary components of the nonbaryonic galactic halo - are theorized to be responsible for the apparent discrepancy between the ages of the universe as defined by different approaches. Nearby globular clusters appear to be older, and this fact can be explained by the accretion of halons onto the stars which accelerates the evolution of the clusters. The clusters at 100 kpc which lie beyond the halo should appear to be as old as the universe. The theory can be examined by comparing the apparent luminosities of central and peripheral RR Lyrae, because the luminosities HB stars outside the halo should be greater than those of nearby metal-poor globular clusters. If the luminosity difference is around +0.4, the halon hypothesis is supported by astronomical observations.
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