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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Astronomy Reports</journal-id><journal-title-group><journal-title xml:lang="en">Astronomy Reports</journal-title><trans-title-group xml:lang="ru"><trans-title>Астрономический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0004-6299</issn><issn publication-format="electronic">3034-5170</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">647533</article-id><article-id pub-id-type="doi">10.31857/S0004629923050055</article-id><article-id pub-id-type="edn">YWPLGZ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Dynamic Study of the Triple Star T Tauri</article-title><trans-title-group xml:lang="ru"><trans-title>Динамическое исследование тройной звезды T Tauri</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kiyaeva</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Кияева</surname><given-names>О. В.</given-names></name></name-alternatives><email>kiyaeva@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Romanenko</surname><given-names>L. G.</given-names></name><name xml:lang="ru"><surname>Романенко</surname><given-names>Л. Г.</given-names></name></name-alternatives><email>lrom1962@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Central (Pulkovo) Astronomical Observatory, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Главная (Пулковская) астрономическая обсерватория РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-05-01" publication-format="electronic"><day>01</day><month>05</month><year>2023</year></pub-date><volume>100</volume><issue>5</issue><fpage>452</fpage><lpage>460</lpage><history><date date-type="received" iso-8601-date="2025-01-28"><day>28</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, О.В. Кияева, Л.Г. Романенко</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, О.В. Кияева, Л.Г. Романенко</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">О.В. Кияева, Л.Г. Романенко</copyright-holder><copyright-holder xml:lang="ru">О.В. Кияева, Л.Г. Романенко</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0004-6299/article/view/647533">https://journals.eco-vector.com/0004-6299/article/view/647533</self-uri><abstract xml:lang="en"><p>The triple system of young stars T Tauri was discovered relatively recently and has attracted the attention of numerous researchers. Many papers have been dedicated to the study of the physical properties of the system’s stars, which are surrounded by a disk of dust and gas. Our work is focused on the astrometric analysis of this triple system using the method of apparent motion parameters (AMP). Currently, the orbit of the inner pair Sa-Sb with a period of 27 years is well-established. Based on the Gaia DR3 parallax, its total mass MSa + Sb=2.49M⊙. Relying on the published high-precision uniform observations with the Keck 1 and VLT telescopes, we employed the AMP method to derive two orbits for the outer pair N-S, one of which is almost circular. For a circular orbit, it is possible to calculate the orbital elements and dynamic parallax for a given mass solely using the apparent motion parameters. This enabled a comparison between the dynamic parallax and the high-precision parallax from the Gaia DR3 catalog, facilitating the calculation of masses of each component based on the mass of the inner subsystem: MN=(2.4±0.2)M⊙, MSa=(2.09±0.05)M⊙, MSb=(0.40±0.05)M⊙. The boundaries for the orbital period were estimated to be 500⩽P⩽700 years.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324336880">Тройная система молодых звезд T Tauri была открыта сравнительно недавно и привлекла внимание многих исследователей. Множество статей посвящено исследованию физических свойств звезд данной системы, окруженных диском из пыли и газа. Наша работа посвящена астрометрическому исследованию тройной системы с использованием метода параметров видимого движения (ПВД). В настоящее время хорошо известна орбита внутренней пары Sa-Sb с периодом 27 лет. С параллаксом Gaia DR3 суммарная масса \({{M}_{{{\text{Sa}} + {\text{Sb}}}}} = 2.49{\kern 1pt} {{M}_{ \odot }}\). Методом ПВД по опубликованным высокоточным однородным наблюдениям на телескопах Keck 1 и VLT получены две орбиты внешней пары N‑S, одна из которых почти круговая. Для круговой орбиты можно вычислить орбитальные элементы и динамический параллакс для заданной массы, используя только параметры видимого движения. Именно это дало возможность сравнить динамический параллакс с высокоточным из каталога Gaia DR3 и вычислить массы компонентов в зависимости от массы внутренней подсистемы: \({{M}_{{\text{N}}}} = (2.4 \pm 0.2) {{M}_{ \odot }}\), \({{M}_{{{\text{Sa}}}}} = (2.09 \pm 0.05) {{M}_{ \odot }}\), \({{M}_{{{\text{Sb}}}}} = (0.40 \pm 0.05) {{M}_{ \odot }}\). Также оценены границы для орбитального периода: \(500 \leqslant P \leqslant 700\) лет.</p></trans-abstract><kwd-group xml:lang="en"><kwd>triple stars</kwd><kwd>T Tauri</kwd><kwd>orbits</kwd><kwd>stellar masses</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>тройные звезды</kwd><kwd>T Tauri</kwd><kwd>орбиты</kwd><kwd>массы звезд</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>H. M. Dyck, T. Simon, and B. Zuckerman, Astrophys. J. 255, 103 (1982).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>C. D. Koresko, Astrophys. J. 531, 147 (2000).</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>B. D. Mason, G. L. Wycoff, W. I. Hartkopf, G. Douglass, and C. Worley, The Washington Visual Double Star Catalogue (Washington: US Naval Observatory, 2016), http://ad.usno.navy.mil/wds/wds.html .</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>G. H. Schaefer, T. L. 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