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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solnechno-Zemnaya Fizika</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solnechno-Zemnaya Fizika</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="online">2712-9640</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">65063</article-id>
   <article-id pub-id-type="doi">10.12737/szf-94202302</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Результаты  исследований</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Results of current research</subject>
    </subj-group>
    <subj-group>
     <subject>Результаты  исследований</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Bright ultraviolet knots as possible sources of coherent microwave radiation</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Яркие ультрафиолетовые узлы как возможные источники когерентного микроволнового излучения</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6873-6394</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Мешалкина</surname>
       <given-names>Наталия Сергеевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Meshalkina</surname>
       <given-names>Nataliya Sergeevna</given-names>
      </name>
     </name-alternatives>
     <email>nata@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1589-556X</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Алтынцев</surname>
       <given-names>Александр Тимофеевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Altyntsev</surname>
       <given-names>Alexander Timofeevich</given-names>
      </name>
     </name-alternatives>
     <bio xml:lang="ru">
      <p>доктор физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2023-12-20T13:18:19+03:00">
    <day>20</day>
    <month>12</month>
    <year>2023</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2023-12-20T13:18:19+03:00">
    <day>20</day>
    <month>12</month>
    <year>2023</year>
   </pub-date>
   <volume>9</volume>
   <issue>4</issue>
   <fpage>21</fpage>
   <lpage>29</lpage>
   <history>
    <date date-type="received" iso-8601-date="2023-06-14T00:00:00+03:00">
     <day>14</day>
     <month>06</month>
     <year>2023</year>
    </date>
    <date date-type="accepted" iso-8601-date="2023-09-14T00:00:00+03:00">
     <day>14</day>
     <month>09</month>
     <year>2023</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/65063/view">https://zh-szf.ru/en/nauka/article/65063/view</self-uri>
   <abstract xml:lang="ru">
    <p>Особенностью события 6 сентября 2012 г. явилось то, что источники узкополосных (2–4 ГГц) субсекундных импульсов (ССИ) наблюдались в небольших областях вспышечных петель c так называемыми яркими ультрафиолетовыми узлами, которые характеризовались высокой плотностью плазмы до 10¹¹ см⁻³. Временные профили жесткого рентгеновского излучения вспышки хотя и подобны микроволновым кривым блеска, но не имеют структур, соответствующих ССИ. Анализ микроволновых, рентгеновских и ультрафиолетовых данных показал, что наблюдаемые импульсы микроволнового излучения c узкой спектральной полосой имеют когерентную природу и генерируются электронами с энергиями нескольких десятков килоэлектронвольт в ярких узлах на частоте около удвоенной плазменной. Результаты наблюдений свидетельствуют, что появление ярких узлов связано с локальными процессами энерговыделения при взаимодействии вспышечных петель.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>A distinctive feature of the September 6, 2012 event was that sources of narrow-band (2–4 GHz) sub-second pulses (SSP) were observed in small areas of flare loops with so-called bright ultraviolet knots with high plasma density up to 10¹¹ cm⁻³. Time profiles of hard X-rays of the flare, although similar to microwave light curves, do not have structures corresponding to SSP. Analysis of microwave, X-ray, and ultraviolet data has shown that the observable pulses of microwave radiation with a narrow spectral band are coherent in nature and are generated by electrons with energies of several tens of kiloelectronvolt in bright knots at a double plasma frequency. The results of the observations suggest that the appearance of bright knots is associated with local processes of energy release due to interaction of flare loops.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>Солнце</kwd>
    <kwd>тонкая временная структура</kwd>
    <kwd>яркие узлы в ультрафиолете</kwd>
    <kwd>микроволновые всплески</kwd>
    <kwd>когерентное излучение</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>Sun</kwd>
    <kwd>fine temporal structure</kwd>
    <kwd>UV bright knots</kwd>
    <kwd>microwave bursts</kwd>
    <kwd>coherent emission</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Минобрнауки России</funding-statement>
    <funding-statement xml:lang="en">The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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