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Direct DEBs in M31 and M33

Published online by Cambridge University Press:  30 March 2016

Lucas M. Macri*
Affiliation:
Hubble Fellow, National Optical Astronomy Observatory, 950 N Cherry Avenue, Tucson, AZ 85719, USA

Extract

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The DIRECT project (as in “direct distances”) started in 1996 with the long-term goal of obtaining distances to two important galaxies in the cosmological distance ladder – M31 and M33 – using detached eclipsing binaries (DEBs) and Cepheids. These two nearby galaxies are the stepping stones in most of the current effort to understand the evolving universe at large scales. Not only are they essential to the calibration of the extragalactic distance scale, but they also constrain population synthesis models for early galaxy formation and evolution. However, accurate distances are essential to make these calibrations free from large systematic uncertainties.

Type
I. Joint Discussions
Copyright
Copyright © Astronomical Society of Pacific 2005

References

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