Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.1471p&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 106, no. 4, p. 1471-1483.
Astronomy and Astrophysics
Astronomy
80
Hertzsprung-Russell Diagram, Stellar Evolution, Stellar Magnitude, Stellar Mass, Stellar Temperature, Color-Color Diagram, Color-Magnitude Diagram, Magellanic Clouds, Star Distribution, Stellar Spectrophotometry
Scientific paper
From photometric and spectroscopic observations of the stars in 30 Doradus we determine the effective stellar temperatures and bolometric magnitudes. We construct the theoretical H-R diagram, and using stellar evolution models we then bin the stars by mass to obtain the initial mass function (IMF). The IMF shows marked curvature; it flattens out at lower masses, even for those masses above which the photometry is complete. Best estimates of the IMF slope yield values of Gamma -1.5 +/- 0.2 for mass above 12 solar masses, where the Salpeter slope is Gamma = -1.35. However, there are indications that different regions of 30 Doradus have different IMF slopes, perhaps as the result of sequential star formation effects.
Garmany Catharine D.
Parker Joel William
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