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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Journal of Natural Sciences Research</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Journal of Natural Sciences Research</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Журнал естественнонаучных исследований</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2500-0489</issn>
   <issn publication-format="online">2500-0489</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">69253</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Астрофизика</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Astrophysics</subject>
    </subj-group>
    <subj-group>
     <subject>Астрофизика</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Comparison of density – temperature scales  of the Universe in cosmological models</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Сравнение шкал плотность – температура Вселенной  в космологических моделях</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Поройков</surname>
       <given-names>С. Ю.</given-names>
      </name>
      <name xml:lang="en">
       <surname>Poroikov</surname>
       <given-names>Sergey Yu.</given-names>
      </name>
     </name-alternatives>
     <email>sporoykov@mail.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-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Московский государственный университет имени М.В.Ломоносова</institution>
    </aff>
    <aff>
     <institution xml:lang="en">Lomonosov Moscow State University</institution>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2023-07-31T21:14:14+03:00">
    <day>31</day>
    <month>07</month>
    <year>2023</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2023-07-31T21:14:14+03:00">
    <day>31</day>
    <month>07</month>
    <year>2023</year>
   </pub-date>
   <volume>8</volume>
   <issue>2</issue>
   <fpage>34</fpage>
   <lpage>48</lpage>
   <history>
    <date date-type="received" iso-8601-date="2023-05-04T00:00:00+03:00">
     <day>04</day>
     <month>05</month>
     <year>2023</year>
    </date>
    <date date-type="accepted" iso-8601-date="2023-05-19T00:00:00+03:00">
     <day>19</day>
     <month>05</month>
     <year>2023</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/69253/view">https://zh-szf.ru/en/nauka/article/69253/view</self-uri>
   <abstract xml:lang="ru">
    <p>Сравнены шкалы плотность – температура в теории горячей Вселенной (ТГВ) и стандарт-ной космологической модели (СКМ). При адиабатическом расширении Вселенной в эпоху радиационного доминирования в ТГВ зависимость от температуры плотности вещества ρ ~ Т3, плотности энергии излучения εν ~ Т4. СКМ учитывает эпоху отделения излучения от вещества в зависимостях: ρ' ~ Т2, εν' ~ Т3. В диапазоне температур 1 эВ – 1 ГэВ с учетом СКМ плотность Вселенной в ρ/ρ' ~ 103 раз ниже, чем в ТГВ, а время ее расширения в t'/t = (ρ/ρ')1/2 ≈ 30 раз больше. Согласно ТГВ дейтерий образовался в эпоху нуклеосинтеза при Т ~ 0,1 МэВ и затем постепенно выгорал при доле барионов Ωb ~ 0,03. Оценена степень выго-рания дейтерия с учетом СКМ относительно ТГВ с учетом критерия Лоусона δD = ρ't'/ρt ≈ 0,03, т.е. обилие дейтерия с учетом СКМ соответствует космологической доле барионов Ωb' = Ωb/δD ≈ 1.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Density-temperature scales in the hot universe theory (HUT) and the standard cosmological model (SCM) are compared. During the adiabatic expansion of the Universe in the era of radiation domi-nance in the HUT the dependence on temperature of the density of substance ρ ~ T3, density radia-tion energy εν ~ T4. The SCM takes into account the epoch of separation of radiation from sub-stance in the dependences: ρ' ~ T2, εν' ~ T3. In the temperature range 1 eV – 1 GeV within the SCM, the density of the Universe is ρ/ρ' ~ 103 times lower than in the HUT, and its expansion time is t'/t = (ρ/ρ')1/2 ≈ 30 times longer. According to the HUT, deuterium was formed during the epoch of nucleosynthesis at T ~ 0.1 MeV and then gradually burned out at a fraction of baryons Ωb ~ 0.03. The degree of deuterium burnout in the framework of the SCM relative to the HUT was esti-mated taking into account the Lawson criterion δD = ρ't'/ρt ≈ 0.03, i.e. deuterium abundance within the SCM corresponds to the cosmological fraction of baryons Ωb' = Ωb/δD ≈ 1.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>теория горячей Вселенной</kwd>
    <kwd>стандартная космологическая модель</kwd>
    <kwd>нуклеосинтез</kwd>
    <kwd>дейтерий</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>hot universe theory</kwd>
    <kwd>standard cosmological model</kwd>
    <kwd>nucleosynthesis</kwd>
    <kwd>deuterium</kwd>
   </kwd-group>
  </article-meta>
 </front>
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