Concept information
Preferred term
Helium-weak stars
Definition
- Chemically peculiar stars with very weak helium lines. Examples include 3 Sco, HD 176582, HD 217833, HR 2949, and HD 21699. The He-weak stars do not form a homogeneous group. Some of them display intense Si, or Ti and Sr lines, and are considered a hot extension of the magnetic Ap/Bp stars. Others show overabundances of P and Ga, typically noted for HgMn stars. The star HD 139160 belongs to the non-magnetic subgroup of He-weak stars. (en)
Broader concept
Narrower concepts
- BW stars (en)
Entry terms
- CP4 (en)
- Helium poor stars (en)
- Helium-poor stars (en)
- Helium weak stars (en)
- He-weak stars (en)
Contributor
URI
http://astrothesaurus.org/uat/717
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