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The Age of the Solar Neighbourhood

Abstract:

High-quality Hipparcos data for a complete sample of nearly 12000 main-sequence and subgiant stars, together with Padua isochrones, are used to constrain the star-formation history of the solar neigbourhood and the processes that stochastically accelerate disk stars. The velocity dispersion of a coeval group of stars is found to increase with time from ~8 kms at birth as t^{0.33}. In the fits, the slope of the IMF near 1 Msun proves to be degenerate with the rate at which the star-formation r...

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Journal:
Monthly Notices of the Royal Astronomical Society
Volume:
318
Issue:
3
Pages:
658
Publication date:
2000-03-31
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
Keywords:
Pubs id:
pubs:167448
UUID:
uuid:03a47b8d-8cfc-41d3-85dd-d53720f3eae4
Local pid:
pubs:167448
Source identifiers:
167448
Deposit date:
2013-02-20

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