Measuring Radii and Temperatures of Stars. Definitions (againâ€¦) Direct measurement of radii Speckle Interferometry Occultations Eclipsing binaries Photometric determinations of radii Bolometric flux Surface brightness Absolute flux Determining temperatures Absolute flux
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R = radius
r = distance
The diameter of Aldebaran is ~40 RSUN. Its distance is about 19 pc. The angular diameter of Aldebaran is …
(work in cgs or MKS units or work in AU and use the definition of a parsec)
What would the angular diameter of the Sun be at 10 pc?
(R is radius in solar units, r is distance in parsecs)
PV(B-V)=logTeff – 0.1BC
“The determination of Teff of B, A and F main sequence stars from the continuum between 3200 A and 3600 A;” Sokolov, N. A.; Astronomy and Astrophysics Supplement, v.110, p.553