Grid for the calculation of log g and T/sub eff/ from Stroemgren four-color indices

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Astron. J.; (United States)

OSTI ID:5700767

Philip, A G.D.; Relyea, L J

Large scale grids of the four-color indices (c/sub 1/)/sub 0/, (b-y)/sub 0/ and log g, T/sub eff/ are presented for use in computing log g and T/sub eff/ values derived from the dereddened Stroemgren four-color indices of Population I and II stars in the range 10,000>T/sub eff/>5,500, 4.5>log g>2.0 and -2.0<(F/sub e//H)<0. Relative to the temperatures of Code et al. (1976) the rms errors are +- 160/sup 0/. Log g values have a rms error of +- 0.2. Relative to the latest Kurucz (1979) models the zero point of the log g values for F-type stars now agree with the models. Colors predicted from temperatures are within 0/sup m/.01 of those predicted by the older models.

• Research Organization: Dudley Observatory and Union College, Schenectady, New York 12308
• OSTI ID: 5700767
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:11; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics &amp; Cosmology-- Stars &amp; Quasi-Stellar
Radio &amp; X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
CHARGED PARTICLES
CHEMICAL COMPOSITION
COLOR
ELEMENTS
IONS
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
METALS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHYSICAL PROPERTIES
STAR MODELS
STARS
STELLAR ATMOSPHERES
TEMPERATURE MEASUREMENT