The angular diameter of R Doradus: a nearby Mira-like star

@article{Bedding1997TheAD,
  title={The angular diameter of R Doradus: a nearby Mira-like star},
  author={Timothy R. Bedding and Albert A. Zijlstra and Oskar von der Luhe and J. Gordon Robertson and Ralph G. Marson and John R. Barton and B. S. Carter},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={1997},
  volume={286},
  pages={957-962}
}
We find the angular diameter of R Doradus to be 57 ± 5 mas, exceeding that of Betelgeuse and implying that R Dor is larger in apparent size than every star except the Sun. R Dor is shown to be closely related to the Mira variables. We estimate an effective temperature of 2740 ± 190 K, a distance of 61 ± 7 pc, a luminosity of 6500 ± 1400 L0 and a radius of 370 ± 50 R 0 . The characteristics of R Dar are consistent with it being near the edge of a Mira instability strip. We detect non-zero… 

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References

SHOWING 1-7 OF 7 REFERENCES
Progress in Telescope and Instrumentation Technologies
  • Progress in Telescope and Instrumentation Technologies
  • 1992
General Catalogue of Variable Stars, 4th Edition,Bull
  • Inf. Centre Donnees Stellaires McGregor P. J.,
  • 1994
IAU Symposium 158: Very High Angular Resolution Imaging
  • IAU Symposium 158: Very High Angular Resolution Imaging
IAU Colloquium 111: The use of pulsating stars in fundamental problems of astronomy
  • IAU Colloquium 111: The use of pulsating stars in fundamental problems of astronomy
This paper has been produced using the Royal Astronomical Society/Blackwell Science L A T E X style file
  • This paper has been produced using the Royal Astronomical Society/Blackwell Science L A T E X style file
  • 1996
IAU Symposium 158: Very High Angular Resolution Imaging
  • IAU Symposium 158: Very High Angular Resolution Imaging
  • 1662