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2013

Direct Ultraviolet Imaging and Spectroscopy of Betelgeuse

Dupree, A. K., Stefanik, R. P.

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Direct images of Betelgeuse were obtained over a span of 4 years with the Faint Object Camera on the Hubble Space Telescope.

These images reveal the extended ultraviolet continuum emission (about 2 times the optical diameter), the varying overall ultraviolet flux levels and a pattern of bright surface continuum features that change in position and appearance over several months or less.
Concurrent photometry and radial velocity measures support the model of a pulsating star, first discovered in the ultraviolet from IUE.
Spatially resolved HST spectroscopy reveals a larger extention in chromospheric emissions of Mg II as well as the rotation of the supergiant.

Direct Ultraviolet Imaging and Spectroscopy of Betelgeuse · Around

Built on

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Similar

Gilliland, R. L., & Dupree, A. K. 1996, ApJ, 463, L29
1996
Cited alongside, same era.
Uitenbroek, H., Dupree, A. K., & Gilliland, R. L. 1998, AJ, 116, 2501
1998
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Lobel, A., & Dupree, A. K. 2001, ApJ, 558, 815
2001
Cited alongside, same era.
Bersier, D. 2002, ApJS, 140, 265
2002
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Jorissen, A. 2004, in Asymptotic Giant Branch Stars
2004
Cited alongside, same era.

Then

Harper, G. M., Brown, A., & Guinan, E. F. 2008, AJ, 135, 1430
2008
Later among the works it cites.
Dupree, A. K. 2010, in Physics of Sun and Star Spots
2010
Later among the works it cites.
Stothers, R. B. 2010, ApJ, 725, 1170
2010
Later among the works it cites.
Henden, A. A., 2012, Observations from the AAVSO International Database, private communication
2012
Later among the works it cites.
Lion, S., Van Eck, S., Chiavassa, A., Plez, B., & Jorissen, A. 2013, this volume
2013
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