Anomalous C IV and SI IV resonance lines in 36 Lyncis.

Abstract

Anomalously strong resonance lines of C IV and Si IV are found in the UV spectrum of the chemically peculiar star 36 Lyncis. The C IV resonance lines near 1550 Å are not found in about 40 other middle or late B-type main-sequence stars. The C IV lines (W_λ ≡ 1.0 Å) are stronger than the Si IV lines (W_λ ≡ 0.7 Å) in 36 Lyn and such an intensity ratio is quite exceptional. The continuous energy distribution of 36 Lyn in the UV region fits with those of late B-type stars. The presence of a hot gas (chromosphere or corona) is suggested.