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Lambda Bootis star




Lambda Bootis
Lambda Bootis
Photo: ESO Online Digitized Sky Survey

A rare type of A star with weak metallic lines (showing a deficiency in heavy elements) and unusually slow rotation. Lambda Bootis stars may be pre-main-sequence objects, or they may be main sequence stars that formed from gas whose metal atoms had been absorbed by interstellar dust. The prototype of the class, Lamba Bootis, lies 97 light-years away in the constellation Bo÷tes. It is of spectral class A0p and has a visual magnitude of 4.18 and a luminosity about 16 times that of the Sun.


Related entry

   • variable stars


Related category

   • TYPES OF STAR