Large convection cells as the source of Betelgeuse's extended atmosphere

Nature

Volumn 392, Issue 6676, 1998, Pages 575-577

  Lim, Jeremy ^a   Carilli, Chris L ^b   White, Stephen M ^c   Beasley, Anthony J ^b   Marson, Ralph G ^b  

^a INSTITUTE OF ASTRONOMY AND ASTROPHYSICS   (Taiwan)

^b NATIONAL RADIO ASTRONOMY OBSERVATORY   (United States)

^c UNIVERSITY OF MARYLAND   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AIR TEMPERATURE; ARTICLE; ASTRONOMY; GAS FLOW; PRIORITY JOURNAL; RADIATION; ULTRAVIOLET RADIATION;

EID: 0032499202     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/33352     Document Type: Article

References (24)

1. Hartmann, L. & MacGregor, K. B. Momentum and energy deposition in late-type stellar atmosphere and winds. Astrophys. J. 242, 260-282 (1980).
2. Hartmann, L. & MacGregor, K. B. Wave-driven winds from cool stars. I. Some effects of magnetic field geometry. Astrophys. J. 247, 264-268 (1982).
3. Holzer, T. E., Flå, T. & Leer, E. Alfvén waves in stellar winds. Astrophys. J. 275, 808-835 (1983).
4. Hartmann, L. & Avrett, E. H. On the extended chromosphere of α Orionis. Astrophys. J. 284, 238-249 (1984).
5. Ulmschneider, P. The chromospheric emission from acoustically heated stellar atmospheres. Astron. Astrophys. 222, 171-178 (1989).
6. Cuntz, M. Chromospheric extents predicted by time-dependent acoustic wave models. Astrophys. J. 349, 141-149 (1990).
7. Cuntz, M. On the generation of mass loss in cool giant stars due to propagating shock waves. Astrophys. J. 353, 255-264 (1990).
8. Bowen, G. H. Dynamical modelling of long-period variable star atmospheres. Astrophys. J. 329, 299-317 (1988).
9. Gilliland, R. & Dupress, A. K. Stellar Surface Structure (eds Strassmeier, K. G. & Linsky, J. L.) 165-172 (IAU Symp. No. 176, Kluwer, Dordrecht, 1996).
10. Gilliland, R. & Dupree, A. K. First image of the surface of a star with the Hubble Space Telescope. Astrophys. J. 436, L29-L32 (1996).
11. Schwarzschild, M. On the scale of photospheric convection in red giants and supergiants. Astrophys. J. 195, 137-144 (1991).
12. Doherty, L. R. On the polarization of Alpha Orionis. Astrophys. J. 307, 261-268 (1986).
13. Buscher, D. F., Haniff, C. A., Baldwin, J. E. & Warner, P. J. Detection of a bright feature on the surface of Betelgeuse. Mon. Not. R. Astron. Soc. 245, 7P-11P (1990).
14. Wilson, R. W., Baldwin, J. E., Buscher, D. F. & Warner, P. J. High-resolution imaging of Betelgeuse and Mira. Mon. Not. R. Astron. Soc. 257, 369-376 (1992).
15. Klückers, V. A., Edmunds, M. G., Morris, R. H. & Wooder, N. Reality and the speckle imaging of stellar surfaces - II. The asymmetry of Alpha Orionis. Mon. Not. R. Astron. Soc. 284, 711-716 (1997).
16. Tuthill, P. G., Haniff, C. A. & Baldwin, J. E. Hotspots on late-type supergiants. Mon. Not. R. Astron. Soc. 285, 529-539 (1997).
17. Dyck, H. M., Benson, J. A., van Belle, G. T. & Ridgway, S. T. Radii and effective temperatures of K and M giants and supergiants. Astron. J. 111, 1705-1712 (1996).
18. Skinner, C. J. & Whitmore, B. The circumstellar environment of α Orionis. Mon. Not. R. Astron. Soc. 224, 335-348 (1987).
19. Skinner, C. J. et al. Circumstellar environments - V. The asymmetric chromosphere and dust shell of α Orionis. Mon. Not. R. Astron. Soc. 288, 295-306 (1997).
20. Hebden, J. C., Eckart, A. & Hege, E. K. The Hα chromosphere of Alpha Orionis. Astrophys. J. 314, 690-698 (1987).
21. Reid, M. J. & Menten, K. M. Radio photospheres of long-period variable stars. Astrophys. J. 476, 327-346 (1997).
22. Kwok, S. Radiation pressure on grains as a mechanism for mass loss in red giants. Astrophys. J. 198, 583-591 (1975).
23. Bester, M. et al. Measurement at 11 micron wavelength of the diameters of α Orionis and α Scorpii, and changes in effective temperature of α Orionis and very recent dust emission. Astrophys. J. 463, 336-343 (1996).
24. Carilli, C. L., Holdaway, M. A. & Sowinski, K. P. Fast Switching at the VLA (VLA Scientific Memo. no. 169, National Radio Astronomical Observatory, Socorro, NM, 1996).