SIMBAD references

2022MNRAS.517L.143K - Mon. Not. R. Astron. Soc., 517, L143-L145 (2022/November-3)

First detection of the He I 10 830 Å emission in spectra of classical Cepheid X Cyg.

KOVTYUKH V.V., ANDRIEVSKY S.M. and KOROTIN S.A.

Abstract (from CDS):

For the first time, we describe a detection of the emission in the infrared (IR) He I triplet at 10 830 Å in the classical Cepheid X Cyg. Emissions are clearly seen at phases approximately from 0.25 to 0.85. The IR redshifted He I emission is excited by shock wave in the uppermost layers of the star's envelope, in its falling layers. This is a first detection of the helium IR emission in the classical Cepheids.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): stars: atmospheres - stars: chromospheres - stars: variables: Cepheids

Simbad objects: 1

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