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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solar-Terrestrial Physics</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solar-Terrestrial Physics</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика / Solnechno-Zemnaya Fizika / Solar-Terrestrial Physics</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">49037</article-id>
   <article-id pub-id-type="doi">10.12737/szf-83202210</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Семнадцатая ежегодная конференция «Физика плазмы в солнечной системе», 7–11 февраля 2022 г., Институт космических исследований РАН, Москва, Россия</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>17th Annual Conference “Plasma Physics in the Solar System”. February 7–11, 2022, Space Research Institute RAS, Moscow, Russia</subject>
    </subj-group>
    <subj-group>
     <subject>Семнадцатая ежегодная конференция «Физика плазмы в солнечной системе», 7–11 февраля 2022 г., Институт космических исследований РАН, Москва, Россия</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Comparison between probability density functions of vertical electric current in solar active regions based on HMI/SDO and SOT/Hinode data</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Сравнение функций плотности вероятности вертикального электрического тока в активных областях Солнца по данным инструментов HMI/SDO и SOT/Hinode</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Нечаева</surname>
       <given-names>Алена Борисовна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Nechaeva</surname>
       <given-names>Alena Borisovna</given-names>
      </name>
     </name-alternatives>
     <email>nechaeva.ab@phystech.edu</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6995-3684</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Зимовец</surname>
       <given-names>Иван Викторович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Zimovets</surname>
       <given-names>Ivan Victorovich</given-names>
      </name>
     </name-alternatives>
     <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-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Шарыкин</surname>
       <given-names>Иван Николаевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Sharykin</surname>
       <given-names>Ivan Nikolaevich</given-names>
      </name>
     </name-alternatives>
     <email>ivan.sharykin@phystech.edu</email>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт космических исследований РАН</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Space Research Institute RAS</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт космических исследований РАН</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Space Research Institute of RAS</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Институт космических исследований РАН</institution>
     <city>Москва</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Space Research Institute RAS</institution>
     <city>Moscow</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2022-09-30T00:00:00+03:00">
    <day>30</day>
    <month>09</month>
    <year>2022</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2022-09-30T00:00:00+03:00">
    <day>30</day>
    <month>09</month>
    <year>2022</year>
   </pub-date>
   <volume>8</volume>
   <issue>3</issue>
   <fpage>68</fpage>
   <lpage>73</lpage>
   <history>
    <date date-type="received" iso-8601-date="2022-02-28T00:00:00+03:00">
     <day>28</day>
     <month>02</month>
     <year>2022</year>
    </date>
    <date date-type="accepted" iso-8601-date="2022-06-23T00:00:00+03:00">
     <day>23</day>
     <month>06</month>
     <year>2022</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/49037/view">https://zh-szf.ru/en/nauka/article/49037/view</self-uri>
   <abstract xml:lang="ru">
    <p>Исследование электрических токов в активных областях (АО) Солнца является важным шагом к пониманию солнечной активности и, в частности, солнечных вспышек. В работе проводится сравнительный анализ функций плотности вероятности (Probability Density Function) вертикального электрического тока PDF(|jz|) в нескольких активных областях, рассчитанных на основе данных HMI/SDO и SOT/Hinode о магнитном поле на фотосфере. Установлено, что в тех частях АО, которые содержат токовые структуры с плотностью тока выше шума  (|jz|)&gt;9·10³статампер/см²) эти функции примерно совпадают. Основное различие возникает для малых (шумовых) значений  |jz|)≲9·10³статампер/см² из-за разной чувствительности рассматриваемых приборов. Было определено также, что критерий отбора пикселов по величине магнитного поля, как предполагалось ранее, неприменим, и схожесть функций определяется именно пикселами с высокими значениями jz. Для всех рассматриваемых PDF(|jz|)  были вычислены показатели степени хвоста функций по данным двух инструментов, которые совпадают в пределах своих погрешностей для токовых структур со значениями больше шумового. Таким образом, нет существенной разницы в том, данные какого прибора рассматривать при анализе функций плотности вероятности токов в областях сильных токов, какими как раз являются те участки АО, где локализованы вспышки.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Studying electric currents in solar active regions (AR) is an essential step in understanding solar activity in general and solar flares in particular. In this paper, we compare probability density functions of vertical electric current PDF(|jz|)  in several active regions, using HMI/SDO and SOT/Hinode photospheric magnetic field data. We have established that at a high value (above the noise level of |jz| &gt;9•10³ statampere/cm²) of current structures of ARs these functions are nearly identical. The main difference in PDFs for low (noise) jz≤9•10³ statampere/cm² is due to differences in sensitivity of these two instruments. We have also found that the criterion of pixel selection from magnetic field strength is inapplicable, and the similarity between PDFs is determined by high jz. For all PDF(|jz|) under study we have calculated the power law exponent of the PDF tail for the two instruments, which coincide within their errors for the current structures with current values above noise level. Thus there is no significant difference as to which instrument is used for analyzing probability density functions in high current parts of ARs where flares are localized.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>солнечные активные области</kwd>
    <kwd>магнитные поля</kwd>
    <kwd>электрические токи</kwd>
    <kwd>солнечные вспышки</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>solar active regions</kwd>
    <kwd>magnetic field</kwd>
    <kwd>electric currents</kwd>
    <kwd>solar flares</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда (проект № 17-72-20134)</funding-statement>
    <funding-statement xml:lang="en">The work was financially supported by the Russian Science Foundation (Project No. 17-72-20134)</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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