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

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...

Full description

Saved in:
Bibliographic Details
Published inMonthly notices of the Royal Astronomical Society. Letters Vol. 517; no. 1; pp. L143 - L145
Main Authors Kovtyukh, V V, Andrievsky, S M, Korotin, S A
Format Journal Article
LanguageEnglish
Published Oxford Journals 01.11.2022
Subjects
Sciences of the Universe
stars: atmospheres
stars: variables: Cepheids
stars: chromospheres
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:1745-3925
1745-3933
1745-3933
DOI:10.1093/mnrasl/slac130