A Closer Look at Cyg OB2 using the HST Fine Guidance Sensors

Details A Closer Look at Cyg OB2 using the HST Fine Guidance Sensors A Closer Look at Cyg OB2 using the HST Fine Guidance Sensors

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21715232c&link_type=abstract

American Astronomical Society, AAS Meeting #217, #152.32; Bulletin of the American Astronomical Society, Vol. 43, 2011

Physics

Optics

Scientific paper

We present results of a survey of 58 young OB stars in Cygnus OB2 that we made with the Fine Guidance Sensor 1r (FGS1r) on the Hubble Space Telescope. FGS1r in its high angular resolution TRANS mode is ideal for detecting binaries with angular separations as small as 0.012" with modest magnitude differences. We found that 22.4% of our sample are members of multiple systems (one triple detected). Using adaptive optics imaging in the infrared, we confirm 11 of the 13 multiple systems.

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