<?xml version="1.0" encoding="ISO-8859-1"?><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">
<front>
<journal-meta>
<journal-id>0185-1101</journal-id>
<journal-title><![CDATA[Revista mexicana de astronomía y astrofísica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. astron. astrofis]]></abbrev-journal-title>
<issn>0185-1101</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Astronomía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-11012021000200391</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2021.57.02.11</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Star formation histories of brightest cluster galaxies with intermediate central ages]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Umanzor]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Talavera]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de Honduras Facultad de Ciencias Espaciales Departamento de Astronomía y Astrofísica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>57</volume>
<numero>2</numero>
<fpage>391</fpage>
<lpage>397</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012021000200391&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012021000200391&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012021000200391&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This work is devoted to the study of the star formation histories (SFHs) of the brightest cluster galaxies (BCGs) with intermediate central ages (from 5 to 10Gyr), to confirm if BCGs with these ages represent different accretion histories or simply a stochastic effect. The sample is composed of 6 BCGs with intermediate central ages and 3 BCGs with old central ages (&gt; 12Gyr) as comparison galaxies. The galaxies were observed with the integrated field spectrograph VIMOS installed in the Very Large Telescope (VLT). The SFHs were obtained with the full spectrum fitting technique using the star population code STARLIGHT. The BCGs of intermediate central age analyzed formed almost 100% of their stars at z &gt; 2 and their SFHs are similar to the SFHs of BCGs of old central ages and elliptical galaxies of similar mass (MDyn   &gt; 10  11    M  &#8857;); therefore, these BCGs do not represent different SFHs.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Este trabajo está dedicado al estudio de las historias de formación estelar (HFE) de BCGs (brightest cluster galaxies) con edades centrales intermedias (de 5 a 10Ga), para confirmar si BCGs con estas edades representan historias de acreción distintas o si es simplemente un efecto estocástico. La muestra está compuesta de 6 BCGs con edades intermedias y 3 BCGs con edades centrales viejas (&gt; 12Ga) como galaxias de comparación. Las galaxias se observaron con el espectrógrafo de campo integrado VIMOS instalado en el VLT (Very Large Telescope). Las HFE se obtuvieron con la técnica de ajuste de todo el espectro usando el código de poblaciones estelares STARLIGHT. Las BCGs de edades centrales intermedias analizadas formaron casi el 100% de sus estrellas a z &gt; 2 y sus HFE son similares a las HFE de BCGs de edades centrales viejas y de galaxias elípticas de masa similar (MDin   &gt; 10  11    M  &#8857;); por tanto, estas BCGs no representan HFE distintas.]]></p></abstract>
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