A HIGH ANGULAR RESOLUTION SURVEY OF MASSIVE STARS IN CYGNUS OB2: RESULTS FROM THE HUBBLE SPACE TELESCOPE FINE GUIDANCE SENSORS

@article{CaballeroNieves2013AHA,
  title={A HIGH ANGULAR RESOLUTION SURVEY OF MASSIVE STARS IN CYGNUS OB2: RESULTS FROM THE HUBBLE SPACE TELESCOPE FINE GUIDANCE SENSORS},
  author={Saida M. Caballero-Nieves and Edmund P. Nelan and Douglas R. Gies and D. J. Wallace and Kathleen DeGioia-Eastwood and Artemio Herrero and Wei Chun Jao and Brian D. Mason and Philip Massey and Anthony F. J. Moffat and Nolan R. Walborn},
  journal={The Astronomical Journal},
  year={2013},
  volume={147},
  pages={40}
}
We present results of a high angular resolution survey of massive OB stars in the Cygnus OB2 association that we conducted with the fine guidance sensor 1R (FGS1r) on the Hubble Space Telescope. FGS1r is able to resolve binary systems with a magnitude difference ΔV 60%. One of the new discoveries is a companion to the hypergiant star MT 304 = Cyg OB2-12, and future measurements of orbital motion should provide mass estimates for this very luminous star. 
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References

SHOWING 1-10 OF 39 REFERENCES
Resolving OB Systems in the Carina Nebula with the Hubble Space Telescope Fine Guidance Sensor
We observed 23 OB stars in the Carina Nebula (NGC 3372) with the Hubble Space Telescope's Fine Guidance Sensor 1r (FGS1r) in its high angular resolution mode. Five of these OB stars are newlyExpand
New very massive stars in Cygnus OB2
Context. The compact association Cygnus OB2 is known to contain a large population of massive stars, but its total mass is currently a matter of debate. While recent surveys have uncovered largeExpand
Massive stars in Cyg OB2
The stellar content of Cyg OB2 has been investigated using CCD photometry and spectroscopy. The intrinsically bluest stars have been isolated for spectroscopy by using a reddening-free parameter. TheExpand
On the massive star contents of Cygnus OB2
We present a near-infrared spectroscopic survey of a large area centered on the Cygnus OB2 association aimed at constraining its massive star contents. Our goal is to establish a nearly complete listExpand
A Radial Velocity Survey of the Cyg OB2 Association
We conducted a radial velocity survey of the Cyg OB2 association over a 6 yr (1999-2005) time interval to search for massive close binaries. During this time we obtained 1139 spectra on 146 OB starsExpand
The High Angular Resolution Multiplicity of Massive Stars
Abstract : We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observationsExpand
A Study of Cygnus OB2: Pointing the Way toward Finding Our Galaxy?s Super-Star Clusters
New optical MK classification spectra have been obtained for 14 OB star candidates identified by Comeron et al. and presumed to be possible members of the Cyg OB2 cluster as recently described byExpand
An R- and I-band Photometric Variability Survey of the Cygnus OB2 Association
We present a catalog of photometrically variable stars discovered within two 21.'3 x 21.'3 fields centered on the Cygnus OB2 association (Cyg OB2). There have hitherto been no deep opticalExpand
High-resolution imaging of Galactic massive stars with AstraLux. I. 138 fields with δ > - 25°
Context. Massive stars have high-multiplicity fractions, and many of them have still undetected components, thus hampering the study of their properties. Aims. I study a sample of massive stars withExpand
A Fresh Catch of Massive Binaries in the Cygnus OB2 Association
Massive binary stars may constitute a substantial fraction of progenitors to supernovae and γ-ray bursts, and the distribution of their orbital characteristics holds clues to the formation process ofExpand
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