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Journal Articles Monthly Notices of the Royal Astronomical Society: Letters Year : 2022

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

V. V. Kovtyukh
  • Function : Author
S. A. Korotin
  • Function : Author

Abstract

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.
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insu-03849367 , version 1 (11-04-2023)

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V. V. Kovtyukh, S. M. Andrievsky, S. A. Korotin. First detection of the He I 10 830 Å emission in spectra of classical Cepheid X Cyg. Monthly Notices of the Royal Astronomical Society: Letters, 2022, 517, pp.L143-L145. ⟨10.1093/mnrasl/slac130⟩. ⟨insu-03849367⟩
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