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Title: Stellar diameters and temperatures. IV. Predicting stellar angular diameters

The number of stellar angular diameter measurements has greatly increased over the past few years due to innovations and developments in the field of long baseline optical interferometry. We use a collection of high-precision angular diameter measurements for nearby, main-sequence stars to develop empirical relations that allow the prediction of stellar angular sizes as a function of observed photometric color. These relations are presented for a combination of 48 broadband color indices. We empirically show for the first time a dependence on metallicity of these relations using Johnson (B – V) and Sloan (g – r) colors. Our relations are capable of predicting diameters with a random error of less than 5% and represent the most robust and empirical determinations of stellar angular sizes to date.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Astronomy, Yale University, New Haven, CT 06511 (United States)
  2. Lowell Observatory, Flagstaff, AZ 86001 (United States)
  3. Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg (Germany)
Publication Date:
OSTI Identifier:
22340005
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (New York, N.Y. Online); Journal Volume: 147; Journal Issue: 3; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; COLOR; DIAGRAMS; ERRORS; FORECASTING; FUNCTIONS; INTERFEROMETRY; MAIN SEQUENCE STARS; METALLICITY; RANDOMNESS; STARS; TEMPERATURE MEASUREMENT