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Star Formation History of the Disk of the Large Magellanic Cloud

Published online by Cambridge University Press:  25 May 2016

J. S. Gallagher ,
Andrew A. Cole ,
J. Holtzman  and
T. Smecker-Hane
J. S. Gallagher
Affiliation:
Dept. Astron., U. Wisconsin, Madison, WI 53706, USA
Andrew A. Cole
Affiliation:
Dept. Astron., U. Wisconsin, Madison, WI 53706, USA
J. Holtzman
Affiliation:
Dept. Astron., New Mexico State U., Las Cruces, NM 88003, USA
T. Smecker-Hane
Affiliation:
Dept. Phys. & Astron., U. California, Irvine, CA 92697, USA

Abstract

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New optical observations of field stars in the Large Magellanic Cloud from the ground and with the Hubble Space Telescope provide the basis for investigations of the history of field star formation in our nearest galactic neighbor. Results from WFPC2 photometry of field stars indicate that the stellar initial mass function for stars around 1 M⊙ is similar to that in the solar neighborhood. Long-term variations occurred in the average SFR with enhanced activity in the past 2–4 Gyr, a fallow period about 2–10 Gyr in the past, and an initial phase of astration ~12 Gyr ago. The recent increase in field star formation is less than that for the birth of compact star clusters; the cluster formation rate does not give a complete evolutionary picture.

Type
Part 5. Stellar Populations and Surveys
Information
Symposium - International Astronomical Union , Volume 190: New Views of the Magellanic Clouds , 1999 , pp. 306 - 312
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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