Betegeuse at maximum luminosity

Details Betegeuse at maximum luminosity Betegeuse at maximum luminosity

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..462d&link_type=abstract

In its Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 462-467 (SEE N85-20961 11-89)

Astronomy and Astrophysics

Astronomy

10

Chromosphere, Iue, Optical Waveguides, Photosphere, Resonance Lines, Stellar Luminosity, Supergiant Stars, Alpha Particles, Brightness Distribution, Ionizing Radiation, Orion Constellation

Scientific paper

Betelgeuse (Alpha Ori; M2 Iab) was extremely bright at optical wavelengths and in the Mg II resonance lines during January and February 1984 when an intrinsic brightening occurred in the photosphere and chromosphere. Linear polarization in the B-band at this time was not anomalous when compared to earlier epochs. The core of the Hα line was redshifted by about 10 km/s with respect to the photospheric lines during January/February as compared to measurements made five months previously. There may be periodic variations in the chromospheric flux.

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