Density streams in the disc winds of Classical T Tauri stars
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Density streams in the disc winds of Classical T Tauri stars
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| Автор |
Petrov, P. P.
Grankin, K. N. Babina, E. V. Artemenko, S. A. Romanova, M. M. Gorda, S. Yu. Djupvik, A. A. Gameiro, J. F. |
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| Тематика |
STARS: INDIVIDUALS: RY TAU, SU AUR
STARS: VARIABLES: T TAURI, HERBIG AE/BE STARS: WINDS, OUTFLOWS ORBITS ACCRETION DISCS LINE OF SIGHT LINES-OF-SIGHT RADIAL VELOCITY STAR: INDIVIDUAL: RY TAU, SU AUR STAR: VARIABLE: T TAURI, HERBIG AE/BE STARS: INDIVIDUAL: RY TAU STARS: VARIABLES STARS: WINDS OUTFLOWS T TAURI STARS STARS |
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| Описание |
Spectral and photometric variability of the Classical T Tauri stars RY Tau and SU Aur from 2013 to 2022 is analysed. We find that in SU Aur the H α line's flux at radial velocity RV = -50 ± 7 km s-1 varies with a period P = 255 ± 5 d. A similar effect previously discovered in RY Tau is confirmed with these new data: P = 21.6 d at RV = -95 ± 5 km s. In both stars, the radial velocity of these variations, the period, and the mass of the star turn out to be related by Kepler's law, suggesting structural features on the disc plane orbiting at radii of 0.2 au in RY Tau and 0.9 au in SU Aur, respectively. Both stars have a large inclination of the accretion disc to the line of sight - so that the line of sight passes through the region of the disc wind. We propose there is an azimuthal asymmetry in the disc wind, presumably in the form of 'density streams,' caused by substructures of the accretion disc surface. These streams cannot dissipate until they go beyond the Alfven surface in the disc's magnetic field. These findings open up the possibility to learn about the structure of the inner accretion disc of CTTS on scales less than 1 au and to reveal the orbital distances related to the planet's formation. © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
National Science Foundation, NSF: AST-2009820; Fundação para a Ciência e a Tecnologia, FCT: UIDB/04434/2020, UIDP/04434/2020; Russian Science Foundation, RSF: 19-72-10063; Ministry of Science and Higher Education of the Russian Federation: FEUZ-2023-0019 The Crimean observations in 2019–2020 by S. Artemenko, E. Babina, and P. Petrov were supported by a grant from the Russian Science Foundation 19-72-10063. The work of SYG was partially supported by the Ministry of Science and Higher Education of Russia, topic no. FEUZ-2023-0019. MMR was supported in part by NSF grant AST-2009820. JFG was supported by fundação para a Ciência e Tecnologia (FCT) through the research grants UIDB/04434/2020 and UIDP/04434/2020. |
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| Дата |
2024-04-05T16:31:43Z
2024-04-05T16:31:43Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/submittedVersion |
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| Идентификатор |
Petrov, P, Grankin, K, Babina, E, Artemenko, S, Romanova, M, Gorda, S, Djupvik, A & Gameiro, JF 2023, 'Density streams in the disc winds of Classical T Tauri stars', Monthly Notices of the Royal Astronomical Society, Том. 524, № 4, стр. 5944-5953. https://doi.org/10.1093/mnras/stad2252
Petrov, P., Grankin, K., Babina, E., Artemenko, S., Romanova, M., Gorda, S., Djupvik, A., & Gameiro, J. F. (2023). Density streams in the disc winds of Classical T Tauri stars. Monthly Notices of the Royal Astronomical Society, 524(4), 5944-5953. https://doi.org/10.1093/mnras/stad2252 0035-8711 Final All Open Access, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85168759862&doi=10.1093%2fmnras%2fstad2252&partnerID=40&md5=5f9dd160feebf7f78c255bd3ac06dade https://arxiv.org/pdf/2308.08899 http://elar.urfu.ru/handle/10995/130734 10.1093/mnras/stad2252 85168759862 001046003200003 |
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| Язык |
en
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| Связанные ресурсы |
info:eu-repo/grantAgreement/RSF//19-72-10063
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| Права |
Open access (info:eu-repo/semantics/openAccess)
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| Формат |
application/pdf
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| Издатель |
Oxford University Press
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| Источник |
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society |
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