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From Wikipedia, the free encyclopedia
Helium-weak stars are chemically peculiar stars which have a weak helium lines for their spectral type.[1][2] Their helium lines place them in a later (i.e. cooler) spectral type then their hydrogen lines.[3]
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This is a non-extensive list of helium-weak stars.[4][5]
Star Name | Constellation | Apparent Magnitude (mv) | Class | Notes |
---|---|---|---|---|
20 Eridani (EG Eridani) | Eridanus | 5.23 | B8/9 III | α2 CVn variable |
30 Capricorni | Capricornus | 5.38 | B5 II/III | |
θ Hydri | Hydrus | 5.50 | B8 III/IV | Suspected Binary; |
22 Eridani (FY Eridani) | Eridanus | 5.53 | B9 IIIpSi (4200) | α2 CVn variable |
HD 74196 | Vela | 5.61 | B7 Vn | Part of IC 2391 |
HD 28843 (DZ Eridani) | Eridanus | 5.81 | B9 III | SX Arietis variable |
12 Canis Majoris (HK Canis Majoris) | Canis Major | 6.08 | B7 II/III | SX Arietis variable |
HD 34797 (TX Leporis) | Lepus | 6.54 | B7 Vp | α2 CVn variable; binary |
HD 35456 | Orion | 6.95 | B9 II/III | Binary |
A related class of stars have anomalously strong helium lines in their spectra, and are known as helium-strong stars.[1]
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