(a) The colour temperature can be determined from two magnitudes corresponding to two different wavelengths. Show that: 7000 K T.- (B-V)+0.47 The wavelengths ofthe B and V bands are 440 nm and 548 nm, respectively, and we assume that B V for stars of the spectral class A0, the colour temperature of which is about 15000 K°. (Take constant value - 0.73 and e-2.718).
(a) The colour temperature can be determined from two magnitudes corresponding to two different wavelengths. Show that: 7000 K T.- (B-V)+0.47 The wavelengths ofthe B and V bands are 440 nm and 548 nm, respectively, and we assume that B V for stars of the spectral class A0, the colour temperature of which is about 15000 K°. (Take constant value - 0.73 and e-2.718).
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Transcribed Image Text:(a) The colour temperature can be determined from two magnitudes corresponding to
two different wavelengths. Show that:
7000 K
Te
(B-V)+0.47
The wavelengths ofthe B and V bands are 440 nm and 548 nm, respectively, and we
assume that B=V for stars of the spectral class A0, the colour temperature of which
is about 15000 K°. (Take constant value - 0.73 and e-2.718).
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