Open Cluster Ages and an Apparent Periodicity in the History of Star Formation in the Solar Neighborhood

Details Open Cluster Ages and an Apparent Periodicity in the History of Star Formation in the Solar Neighborhood Open Cluster Ages and an Apparent Periodicity in the History of Star Formation in the Solar Neighborhood

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.9710c&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #97.10; Bulletin of the American Astronomical Society, Vol. 24, p.1274

Astronomy and Astrophysics

Astronomy

Scientific paper

We explore the use of open cluster ages as a tool to investigate the Star Formation Rate (SFR) of the galactic disk in the solar neighborhood. A histogram formed by sorting the ages of 191 open clusters located within 1500 pc yields a history of the SFR which is in good agreement with that derived from chromospheric ages: a burst of star formation within the last 4 times 10(8) years is clearly seen, and at 6 times 10(9) years. The use of open clusters gives a much firmer statistical basis from which to explore any fine structure in the SFR, and a striking periodicity is revealed on the order of 5times 10(7) years. Fourier analysis of the obtained SFR lends insight into the physical manifestations of spiral density wave theory, and yields results in good agreement with the projections of that theory.

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