The close circumstellar environment of Betelgeuse - V. Rotation velocity and molecular envelope properties from ALMA

@article{Kervella2017TheCC,
  title={The close circumstellar environment of Betelgeuse - V. Rotation velocity and molecular envelope properties from ALMA},
  author={P. Kervella and L. Decin and A. Richards and G. Harper and I. McDonald and E. O'Gorman and M. Montarg{\`e}s and W. Homan and K. Ohnaka},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2017}
}
We observed Betelgeuse using ALMA's extended configuration in band 7 (f~340 GHz, {\lambda}~0.88 mm), resulting in a very high angular resolution of 18 mas. Using a solid body rotation model of the 28SiO(v=2,J=8-7) line emission, we show that the supergiant is rotating with a projected equatorial velocity of v_eq sin i = 5.47 +/- 0.25 km/s at the equivalent continuum angular radius R_star = 29.50 +/- 0.14 mas. This corresponds to an angular rotation velocity of {\omega} sin i = (5.6 +/- 1.3) x… Expand
24 Citations
Rotation of the asymptotic giant branch star R Doradus
The exceptional X-ray evolution of SN 1996cr in high resolution.
Extremely High Excitation SiO Lines in Disk-outflow Systems in Orion Source i
Is Betelgeuse the Outcome of a Past Merger
Spatially Resolved Ultraviolet Spectroscopy of the Great Dimming of Betelgeuse
The Betelgeuse Project II: asteroseismology
Convective cells in Betelgeuse: imaging through spectropolarimetry
AGBs, Post-AGBs and the Shaping of Planetary Nebulae
...
1
2
3
...

References

SHOWING 1-10 OF 59 REFERENCES
Evolutionary tracks for Betelgeuse
The close circumstellar environment of Betelgeuse - III. SPHERE/ZIMPOL imaging polarimetry in the visible
Spatially Resolved Hubble Space Telescope Spectra of the Chromosphere of α Orionis
Modeling the Variable Chromosphere of α Orionis
SOFIA-EXES Mid-IR Observations of [Fe II] Emission from the Extended Atmosphere of Betelgeuse
...
1
2
3
4
5
...