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Additional
subdwarf
English Wikipedia - The Free Encyclopedia
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Subdwarf
A
subdwarf
, sometimes denoted by "sd", is a star with
luminosity class
VI under the
Yerkes spectral classification
system. They are defined as
stars
with
luminosity
1.5 to 2
magnitudes
lower than that of main-sequence stars of the same
spectral type
. On an
Hertzsprung–Russell diagram
subdwarfs appear to lie below the
main sequence
.
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