Lambda Boötis star
Encyclopedia
A Lambda Boötis star is a type of peculiar star
which has an unusually low abundance of iron peak
elements in its surface layers. One possible explanation for this is that it is the result of accretion of metal
-poor gas from a circumstellar disc. The prototype is Lambda Boötis
.
Peculiar star
In astrophysics, peculiar stars have distinctly unusual metal abundances, at least in their surface layers.Chemically peculiar stars are common among hot main sequence stars...
which has an unusually low abundance of iron peak
Iron peak
The iron peak is a local maximum in the vicinity of Fe on the graph of the abundances of chemical elements, as seen below....
elements in its surface layers. One possible explanation for this is that it is the result of accretion of metal
Metallicity
In astronomy and physical cosmology, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium...
-poor gas from a circumstellar disc. The prototype is Lambda Boötis
Lambda Boötis
Lambda Boötis is a star in the constellation Boötes.Lambda Boötis is a white A-type main sequence dwarf with an apparent magnitude of +4.18. It is approximately 97.1 light-years from Earth. Lambda Boötis is the prototype of a group of rare stars known as Lambda Boötis stars, all of which are...
.