Magnetic field and radial velocities of the star Chi Draconis A

Byeong Cheol Lee; D. Gadelshin; Inwoo Han; Dong Il Kang; Kang Min Kim; G. Valyavin; G. Galazutdinov; Gwanghui Jeong; N. Beskrovnaya; T. Burlakova; A. Grauzhanina; N. R. Ikhsanov; A. F. Kholtygin; A. Valeev; V. Bychkov; Myeong Gu Park

doi:10.1093/mnrasl/slx152

Magnetic field and radial velocities of the star Chi Draconis A

Byeong Cheol Lee, D. Gadelshin, Inwoo Han, Dong Il Kang, Kang Min Kim, G. Valyavin, G. Galazutdinov, Gwanghui Jeong, N. Beskrovnaya, T. Burlakova, A. Grauzhanina, N. R. Ikhsanov, A. F. Kholtygin, A. Valeev, V. Bychkov, Myeong Gu Park

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4 Scopus citations

Abstract

We present high-resolution spectropolarimetric observations of the spectroscopic binary χ Dra. Spectral lines in the spectrum of the main component χ DraA show variable Zeeman displacement, which confirms earlier suggestions about the presence of a weak magnetic field on the surface of this star. Within about 2 yr of time base of our observations, the longitudinal component B_L of the magnetic field exhibits variation from -11.5 ± 2.5 to +11.1 ± 2.1G with a period of about 23 d. Considering the rotational velocity of χ Dra A in the literature and that newly measured in this work, this variability may be explained by the stellar rotation under the assumption that the magnetic field is globally stable. Our new measurements of the radial velocities (RV) in high-resolution I-spectra of χ DraA refined the orbital parameters and reveal persistent deviations of RVs from the orbital curve.We suspect that these deviations may be due to the influence of local magnetically generated spots, pulsations, or a Jupiter-size planet orbiting the system.

Original language	English
Pages (from-to)	L41-L45
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Volume	473
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slx152
State	Published - Jan 2018

Keywords

Binaries
Individual
Magnetic field
Stars
Stars
χ Dra

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Lee, B. C., Gadelshin, D., Han, I., Kang, D. I., Kim, K. M., Valyavin, G., Galazutdinov, G., Jeong, G., Beskrovnaya, N., Burlakova, T., Grauzhanina, A., Ikhsanov, N. R., Kholtygin, A. F., Valeev, A., Bychkov, V., & Park, M. G. (2018). Magnetic field and radial velocities of the star Chi Draconis A. Monthly Notices of the Royal Astronomical Society: Letters, 473(1), L41-L45. https://doi.org/10.1093/mnrasl/slx152

@article{c71406a3b2214612aa0da7f6dedf4c6d,

title = "Magnetic field and radial velocities of the star Chi Draconis A",

abstract = "We present high-resolution spectropolarimetric observations of the spectroscopic binary χ Dra. Spectral lines in the spectrum of the main component χ DraA show variable Zeeman displacement, which confirms earlier suggestions about the presence of a weak magnetic field on the surface of this star. Within about 2 yr of time base of our observations, the longitudinal component BL of the magnetic field exhibits variation from -11.5 ± 2.5 to +11.1 ± 2.1G with a period of about 23 d. Considering the rotational velocity of χ Dra A in the literature and that newly measured in this work, this variability may be explained by the stellar rotation under the assumption that the magnetic field is globally stable. Our new measurements of the radial velocities (RV) in high-resolution I-spectra of χ DraA refined the orbital parameters and reveal persistent deviations of RVs from the orbital curve.We suspect that these deviations may be due to the influence of local magnetically generated spots, pulsations, or a Jupiter-size planet orbiting the system.",

keywords = "Binaries, Individual, Magnetic field, Stars, Stars, χ Dra",

author = "Lee, {Byeong Cheol} and D. Gadelshin and Inwoo Han and Kang, {Dong Il} and Kim, {Kang Min} and G. Valyavin and G. Galazutdinov and Gwanghui Jeong and N. Beskrovnaya and T. Burlakova and A. Grauzhanina and Ikhsanov, {N. R.} and Kholtygin, {A. F.} and A. Valeev and V. Bychkov and Park, {Myeong Gu}",

note = "Publisher Copyright: {\textcopyright} 2017, The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2018",

month = jan,

doi = "10.1093/mnrasl/slx152",

language = "English",

volume = "473",

pages = "L41--L45",

journal = "Monthly Notices of the Royal Astronomical Society: Letters",

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Lee, BC, Gadelshin, D, Han, I, Kang, DI, Kim, KM, Valyavin, G, Galazutdinov, G, Jeong, G, Beskrovnaya, N, Burlakova, T, Grauzhanina, A, Ikhsanov, NR, Kholtygin, AF, Valeev, A, Bychkov, V & Park, MG 2018, 'Magnetic field and radial velocities of the star Chi Draconis A', Monthly Notices of the Royal Astronomical Society: Letters, vol. 473, no. 1, pp. L41-L45. https://doi.org/10.1093/mnrasl/slx152

TY - JOUR

T1 - Magnetic field and radial velocities of the star Chi Draconis A

AU - Lee, Byeong Cheol

AU - Gadelshin, D.

AU - Han, Inwoo

AU - Kang, Dong Il

AU - Kim, Kang Min

AU - Valyavin, G.

AU - Galazutdinov, G.

AU - Jeong, Gwanghui

AU - Beskrovnaya, N.

AU - Burlakova, T.

AU - Grauzhanina, A.

AU - Ikhsanov, N. R.

AU - Kholtygin, A. F.

AU - Valeev, A.

AU - Bychkov, V.

AU - Park, Myeong Gu

PY - 2018/1

Y1 - 2018/1

N2 - We present high-resolution spectropolarimetric observations of the spectroscopic binary χ Dra. Spectral lines in the spectrum of the main component χ DraA show variable Zeeman displacement, which confirms earlier suggestions about the presence of a weak magnetic field on the surface of this star. Within about 2 yr of time base of our observations, the longitudinal component BL of the magnetic field exhibits variation from -11.5 ± 2.5 to +11.1 ± 2.1G with a period of about 23 d. Considering the rotational velocity of χ Dra A in the literature and that newly measured in this work, this variability may be explained by the stellar rotation under the assumption that the magnetic field is globally stable. Our new measurements of the radial velocities (RV) in high-resolution I-spectra of χ DraA refined the orbital parameters and reveal persistent deviations of RVs from the orbital curve.We suspect that these deviations may be due to the influence of local magnetically generated spots, pulsations, or a Jupiter-size planet orbiting the system.

AB - We present high-resolution spectropolarimetric observations of the spectroscopic binary χ Dra. Spectral lines in the spectrum of the main component χ DraA show variable Zeeman displacement, which confirms earlier suggestions about the presence of a weak magnetic field on the surface of this star. Within about 2 yr of time base of our observations, the longitudinal component BL of the magnetic field exhibits variation from -11.5 ± 2.5 to +11.1 ± 2.1G with a period of about 23 d. Considering the rotational velocity of χ Dra A in the literature and that newly measured in this work, this variability may be explained by the stellar rotation under the assumption that the magnetic field is globally stable. Our new measurements of the radial velocities (RV) in high-resolution I-spectra of χ DraA refined the orbital parameters and reveal persistent deviations of RVs from the orbital curve.We suspect that these deviations may be due to the influence of local magnetically generated spots, pulsations, or a Jupiter-size planet orbiting the system.

KW - Binaries

KW - Individual

KW - Magnetic field

KW - Stars

KW - χ Dra

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U2 - 10.1093/mnrasl/slx152

DO - 10.1093/mnrasl/slx152

M3 - Article

AN - SCOPUS:85044414393

SN - 1745-3925

VL - 473

SP - L41-L45

JO - Monthly Notices of the Royal Astronomical Society: Letters

JF - Monthly Notices of the Royal Astronomical Society: Letters

IS - 1

ER -

Magnetic field and radial velocities of the star Chi Draconis A

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