Effective temperature and models for early a stars: Application to 78Vir (A2P)

  • R. Monier
IV. Non-classical Phenomena in Early-Type Stars
Part of the Lecture Notes in Physics book series (LNP, volume 401)


The energy distribution (ED) of the cool Ap star 78Vir is presented from 1200 Å to 22000 Å at phase 0.0 of its 3.7220 dys rotation period. The ED is used to calculate the integrated flux and the Infrared Flux Method (IRFM,Blackwell and Shallis, 1977) is applied to derive the effective temperature and the angular diameter of 78Vir. A grid of models was then computed for the found effective temperature within its uncertainty, surface gravities around 4.0 and three different chemical compositions. A chisquare technique is used to sort out the best fit(s) to the observed ED.


Energy Distribution Effective Temperature Surface Gravity Model Flux Angular Diameter 
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 1992

Authors and Affiliations

  • R. Monier
    • 1
  1. 1.ESA IUE Observatory28 MadridSpain

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