Titanium oxide absorption and spot sizes in II PEG, HR 1099, and UX ARI

  • David P. Huenemoerder
Contributed Papers on Active Binary Stars
Part of the Lecture Notes in Physics book series (LNP, volume 291)


Excess TiO absorption line strengths have been detected in II Peg, HR 1099, and UX Ari, directly indicating large cool regions in the photosphere. Spot sizes of 10%–20% of the stellar surface area and temperatures equivalent to an M6 spectral type were derived from a spectroscopic model.


Spectral Type Stellar Surface Titanium Oxide Absorption Standard Star Polar Spot 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • David P. Huenemoerder
    • 1
  1. 1.Department of AstronomyThe Pennsylvania State UniversityUniversity Park

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