Research output: Contribution to journal › Article › peer-review
Super-Fast Line-Profile Variability in the Spectra of OBA Stars. IV : ζ Ori A. / Kholtygin, A. F.; Moiseeva, A. V.; Kurdoyakova, M. S.; Yakunin, I. A.; Kostenkov, A. E.; Karataeva, G. M.
In: Astrophysical Bulletin, Vol. 76, No. 2, 04.2021, p. 185-195.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Super-Fast Line-Profile Variability in the Spectra of OBA Stars. IV
T2 - ζ Ori A
AU - Kholtygin, A. F.
AU - Moiseeva, A. V.
AU - Kurdoyakova, M. S.
AU - Yakunin, I. A.
AU - Kostenkov, A. E.
AU - Karataeva, G. M.
N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd.
PY - 2021/4
Y1 - 2021/4
N2 - Absctract—The present study continues the investigation of the super-fast variability of line profiles in the spectra of stars of early spectral types. We studied the line-profile variability in the spectrum of the binary (O9.7Ib+B0III) star ζ Ori A using the MSS spectrograph of the 6-m BTA telescope based on observations carried out on February 19, 2019. Short-period regular variations of the hydrogen Balmer lines and He I lines with periods from 89 to 295 minutes were found. The presence of short-period variations in the period interval of 10–20 minutes is also possible. An analysis of the stellar brightness variations from observations by the TESS satellite showed the presence of seven regular components, one of which is probably the second harmonic of the rotation period of the main component of the Aa star ζ Ori A. The magnetic field of the star was determined for the whole series of observations. The longitudinal component of the root-mean-square magnetic field measured by the regression method over the whole observation period is 49 G.
AB - Absctract—The present study continues the investigation of the super-fast variability of line profiles in the spectra of stars of early spectral types. We studied the line-profile variability in the spectrum of the binary (O9.7Ib+B0III) star ζ Ori A using the MSS spectrograph of the 6-m BTA telescope based on observations carried out on February 19, 2019. Short-period regular variations of the hydrogen Balmer lines and He I lines with periods from 89 to 295 minutes were found. The presence of short-period variations in the period interval of 10–20 minutes is also possible. An analysis of the stellar brightness variations from observations by the TESS satellite showed the presence of seven regular components, one of which is probably the second harmonic of the rotation period of the main component of the Aa star ζ Ori A. The magnetic field of the star was determined for the whole series of observations. The longitudinal component of the root-mean-square magnetic field measured by the regression method over the whole observation period is 49 G.
KW - stars: chemically peculiar
KW - stars: individual: ζ Ori
KW - stars: magnetic field
KW - stars: variability, pulsations
KW - zeta Ori
KW - WEAK MAGNETIC-FIELD
KW - stars: variability
KW - pulsations
KW - MAIN STELLAR SPECTROGRAPH
KW - stars: individual
UR - http://www.scopus.com/inward/record.url?scp=85110777774&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/d4a71dba-cd27-304d-a49c-182ea90b2945/
U2 - 10.1134/S1990341321020048
DO - 10.1134/S1990341321020048
M3 - Article
AN - SCOPUS:85110777774
VL - 76
SP - 185
EP - 195
JO - Astrophysical Bulletin
JF - Astrophysical Bulletin
SN - 1990-3413
IS - 2
ER -
ID: 84407598