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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="research-article" 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">647677</article-id><article-id pub-id-type="doi">10.31857/S0004629924120014</article-id><article-id pub-id-type="edn">IDJZMQ</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Spectroscopic searches for evolutionary orbital period changes in WR+OB binaries: the case of WR 141</article-title><trans-title-group xml:lang="ru"><trans-title>Спектроскопический поиск эволюционных изменений орбитального периода в двойных системах типа WR+OB. Случай WR141</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shaposhnikov</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Шапошников</surname><given-names>И. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Physics</p></bio><bio xml:lang="ru"><p>Физический факультет</p></bio><email>iv.shaposhnikov@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University, Sternberg Astronomical Institute</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М. В. Ломоносова, Государственный астрономический институт им. П. К. Штернберга</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М. В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2024</year></pub-date><volume>101</volume><issue>12</issue><fpage>1034</fpage><lpage>1042</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 ©; 2024, The Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">The Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0004-6299/article/view/647677">https://journals.eco-vector.com/0004-6299/article/view/647677</self-uri><abstract xml:lang="en"><p>The results of new low-resolution spectroscopic observations of the short-period system WR 141 (WN5o+O5V–III, <italic>P</italic> ≈ 21.7<sup><italic>d</italic></sup>) are presented, as well as the results of their comparison with the material of previous studies in order to search for an evolutionary change in the orbital period. A secular increase in the orbital period of WR 141 with a rate of <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mover><mi>Р</mi><mo>˙</mo></mover><mo>=</mo><mn>1</mn><mo>.</mo><mn>6</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>9</mn></math> sec/year, corresponding to a mass loss rate of <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mover><mi>M</mi><mo>˙</mo></mover><mrow><mi>W</mi><mi>R</mi></mrow></msub><mo>=</mo><mo>(</mo><mn>3</mn><mo>.</mo><mn>1</mn><mo>±</mo><mn>1</mn><mo>.</mo><mn>9</mn><mo>)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>5</mn></mrow></msup><msub><mi>М</mi><mo>⊙</mo></msub><mo>/</mo><mi>yr</mi></math> with the masses of the stars in the system of <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>WR</mi></msub><mo>=</mo><mn>39</mn><mo>±</mo><mn>10</mn><msub><mi>M</mi><mi>ʘ</mi></msub></math> and <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>O</mi></msub><mo>=</mo><mn>37</mn><mo>±</mo><mn>10</mn><msub><mi>M</mi><mi>ʘ</mi></msub></math>, is reported. A correlation between the mass loss rate of WR stars and their mass is discussed.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены результаты новых спектроскопических наблюдений низкого разрешения короткопериодической системы WR141 (WN5o+O5V–III, <italic>P</italic> ≈ 21.7<sup><italic>d</italic></sup>), а также результаты их сравнения с материалом предыдущих исследований с целью поиска эволюционного изменения орбитального периода. Сообщается об обнаружении векового увеличения орбитального периода WR141 с темпом <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mover><mi>Р</mi><mo>˙</mo></mover><mo>=</mo><mn>1</mn><mo>.</mo><mn>6</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>9</mn></math> с/год, соответствующего темпу потери массы <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mover><mi>M</mi><mo>˙</mo></mover><mrow><mi>W</mi><mi>R</mi></mrow></msub><mo>=</mo><mo>(</mo><mn>3</mn><mo>.</mo><mn>1</mn><mo>±</mo><mn>1</mn><mo>.</mo><mn>9</mn><mo>)</mo><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>5</mn></mrow></msup><msub><mi>М</mi><mo>⊙</mo></msub><mo>/</mo><mi>год</mi></math> при массах звезд в системе <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>WR</mi></msub><mo>=</mo><mn>39</mn><mo>±</mo><mn>10</mn><msub><mi>M</mi><mi>ʘ</mi></msub></math> и <math xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mi>M</mi><mi>O</mi></msub><mo>=</mo><mn>37</mn><mo>±</mo><mn>10</mn><msub><mi>M</mi><mi>ʘ</mi></msub></math>. Обсуждается корреляция между темпом потери массы звездами WR и их массой.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Wolf-Rayet stars</kwd><kwd>mass loss</kwd><kwd>stellar wind</kwd><kwd>spectroscopic binaries</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>звезды Вольфа-Райе</kwd><kwd>потеря массы</kwd><kwd>звездный ветер</kwd><kwd>спектроскопические двойные</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>23-12-00092</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Kh.F. Khaliullin, Soviet Astron. 18, 229 (1974).</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>I.A. Shaposhnikov, A.M. Cherepashchuk, A.V. Dodin, and K.A. 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