An absolutely calibrated T eff scale from the infrared flux method

Various effective temperature scales have been proposed over the years. Despite much work and the high internal precision usually achieved, systematic differences of order 100 K (or more) among various scales are still present. We present an investigation based on the infrared flux method aimed at assessing the source of such discrepancies and pin down their origin. We break the impasse among different scales by using a large set of solar twins, stars which are spectroscopically and photometrically identical to the Sun, to set the absolute zero point of the effective temperature scale to within few degrees. Our newly calibrated, accurate and precise temperature scale applies to dwarfs and subgiants, from…

• NS
  National Science Foundation
• NA
  National Aeronautics and Space Administration
• CI
  California Institute of Technology
• MD
  Ministério da Ciência, Tecnologia e Ensino Superior
• UD
  Université de Lausanne
• FP
  Fundação para a Ciência e a Tecnologia

  Award: Ciência 2007