PRECISE MEASUREMENT OF STELLAR TEMPERATURES USING LINE-DEPTH RATIOS

PRECISE MEASUREMENT OF STELLAR TEMPERATURES USING LINE-DEPTH RATIOS

The ratio of line depth for two spectral lines is used to determine stellar temperatures with a precision = 10 K = 0.2 percent. For stars between late-F and early-K spectral types, the V I 6251 to Fe I 6253 depth ratio is easy to measure. It is also applicable to other temperature regimes if suitabl...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 1991-05, Vol.103 (663), p.439-443
Hauptverfasser: GRAY, DAVID F., JOHANSON, HEATHER L.
Format: Artikel
Sprache:eng
Schlagworte:
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
ACCURACY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DWARF STARS
Effective temperature
Error rates
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
Polynomials
SPECTRA
STARS
Stellar classification
Stellar spectra
Stellar temperature
Temperature gradients
TEMPERATURE MEASUREMENT
Temperature ratio
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Zusammenfassung:The ratio of line depth for two spectral lines is used to determine stellar temperatures with a precision = 10 K = 0.2 percent. For stars between late-F and early-K spectral types, the V I 6251 to Fe I 6253 depth ratio is easy to measure. It is also applicable to other temperature regimes if suitable lines can be found. 14 refs.
ISSN:0004-6280
1538-3873
DOI:10.1086/132839