Modeling of the magnetic chemically peculiar star HD 188101

Bayazitov R.; Mashonkina L.

doi:doi:10.26119/VAK2024.047

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Modeling of the magnetic chemically peculiar star HD 188101

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MODELING OF THE MAGNETIC CHEMICALLY PECULIAR STAR HD 188101

Section: STARS AND THE INTERSTELLAR MEDIUM

Proceedings: MODERN ASTRONOMY: FROM THE EARLY UNIVERSE TO EXOPLANETS AND BLACK HOLES Volume 1

UDK 52 Астрономия. Геодезия UDK 53 Физика UDK 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа UDK 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии UDK 523 Солнечная система UDK 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система UDK 52-1 Метод изучения UDK 52-6 Излучение и связанные с ним процессы

GRNTI 41.00 АСТРОНОМИЯ GRNTI 29.35 Радиофизика. Физические основы электроники GRNTI 29.31 Оптика GRNTI 29.33 Лазерная физика GRNTI 29.27 Физика плазмы GRNTI 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий

OKSO 03.06.01 Физика и астрономия OKSO 03.05.01 Астрономия OKSO 03.04.03 Радиофизика

BBK 2 ЕСТЕСТВЕННЫЕ НАУКИ BBK 223 Физика

TBK 614 Астрономия TBK 6135 Оптика

BISAC SCI004000 Astronomy BISAC SCI005000 Physics / Astrophysics

Bayazitov R. ¹

Mashonkina L. ²

Author and publication information

Authors:

1. Kazan Federal University

2. Institute of Astronomy of the Russian Academy of Sciences

Type:

Сonference article

DOI:

https://doi.org/10.26119/VAK2024.047

EDN:

https://elibrary.ru/ltsgey

Published:

27.12.2024

Subject area:

52
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000

Language:

English

Keywords:

stars: chemically peculiar, abundances, atmospheres, magnetic fields

Abstract and keywords

Abstract (English):
We present the study of the He-weak star HD 188101. Using spectral observations obtained with the Main stellar spectrograph (MSS) and the Nasmyth echelle spectrograph (NES) mounted on the BTA SAO RAS and the data from the literature, we determined the fundamental parameters:

T_{e f f} = 15600 \pm 400

\log g_{s p e c} = 3.87 \pm 0.13

R = 2.1 - 3.1

R_{⊙}

M = 3.8 - 4.8

M_{⊙}

. Chemical abundances were determined by the synthetic spectrum method: under the LTE assumption for He, N, Ti, Fe and without LTE for C, O, Mg, Si. For Si and Fe, overabundance of about 0.6 dex relative to the solar abundance was found. The non-LTE calculations with the stellar Si abundance lead to consistent abundances from lines of Si II and Si III, while the difference between LTE abundances amounts to 0.8 dex.

Keywords:
stars: chemically peculiar, abundances, atmospheres, magnetic fields

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References

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