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Taking the Measure of Massive Stars and their Environments with the CHARA Array Long-baseline Interferometer

Published online by Cambridge University Press:  28 July 2017

Douglas R. Gies Open the ORCID record for Douglas R. Gies [Opens in a new window]
Douglas R. Gies*
Affiliation:
Center for High Angular Resolution Astronomy, Georgia State University, P.O. Box 5060, Atlanta, Georgia 30302-5060, U.S.A. email: [email protected]
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Abstract

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Most massive stars are so distant that their angular diameters are too small for direct resolution. However, the observational situation is now much more favorable, thanks to new opportunities available with optical/IR long-baseline interferometry. The Georgia State University Center for High Angular Resolution Astronomy Array at Mount Wilson Observatory is a six-telescope instrument with a maximum baseline of 330 meters, which is capable of resolving stellar disks with diameters as small as 0.2 milliarcsec. The distant stars are no longer out of range, and many kinds of investigations are possible. Here we summarize a number of studies involving angular diameter measurements and effective temperature estimates for OB stars, binary and multiple stars (including the σ Orionis system), and outflows in Luminous Blue Variables. An enlarged visitors program will begin in 2017 that will open many opportunities for new programs in high angular resolution astronomy.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 156 - 160
Copyright
Copyright © International Astronomical Union 2017 

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