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On Magnetic Field Structure of Chemically Peculiar Star \(\boldsymbol{\alpha}^{\mathbf{2}}\) CVn

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Abstract

We searched again for a radial (vertical) gradient of the longitudinal magnetic field of the chemically peculiar star \(\alpha^{2}\) CVn. We considered the history of magnetic studies of this object demonstrating large differences in the data obtained with different methods. Such differences can be explained by the fact that the magnetic field sharply drops (by 2 orders stronger than in the case of a dipole structure) with height in the atmosphere. The spectroscopic, spectropolarimetric, and photometric data indicate that the large- and small-scale structure of the atmosphere of \(\alpha^{2}\) CVn has not changed over more than 90 years of observations.

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ACKNOWLEDGMENTS

The authors thank the Russian Telescope Time Allocation Committee (RTTAC—https://www.sao.ru/hq/Komitet) for allocating the observation time. When working, the authors used the databases: SIMBAD (https://simbad.cds.unistra.fr), VizieR (https://vizier.cds.unistra.fr), and the NASA Astrophysics Data System (ADS) (https://ui.adsabs.harvard.edu).

Funding

The work was supported by the Russian Foundation for Basic Research, grant No. 20-02-00233. Observations with the SAO RAS telescopes are supported by the Ministry of Science and Higher Education of the Russian Federation. The renovation of telescope equipment is currently provided within the national project ‘‘Science and universities.’’

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Russia

    I. I. Romanyuk, A. V. Moiseeva, D. O. Kudryavtsev, I. A. Yakunin & V. N. Aitov

  2. Crimean Astrophysical Observatory, Russian Academy of Sciences, 298409, Nauchny, Russia

    D. N. Baklanova

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  1. I. I. Romanyuk
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  2. A. V. Moiseeva
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  3. D. O. Kudryavtsev
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  4. I. A. Yakunin
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  5. V. N. Aitov
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  6. D. N. Baklanova
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Correspondence to I. I. Romanyuk.

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Translated by N. Oborina

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Romanyuk, I.I., Moiseeva, A.V., Kudryavtsev, D.O. et al. On Magnetic Field Structure of Chemically Peculiar Star \(\boldsymbol{\alpha}^{\mathbf{2}}\) CVn. Astrophys. Bull. 78, 49–59 (2023). https://doi.org/10.1134/S199034132301008X

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  • DOI: https://doi.org/10.1134/S199034132301008X

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