<?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>S0185-11012019000200185</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2019.55.02.06</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The environmental dependence of galaxy age and stellar mass in the redshift region 0.6 &#8804; z &#8804; 0.75]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Deng]]></surname>
<given-names><![CDATA[Xin-Fa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Nanchang University School of Science ]]></institution>
<addr-line><![CDATA[Jiangxi ]]></addr-line>
<country>China</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>55</volume>
<numero>2</numero>
<fpage>185</fpage>
<lpage>191</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012019000200185&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012019000200185&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012019000200185&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this work, I construct a LRG (Luminous Red Galaxy) sample with redshifts 0.6 &#8804; z &#8804; 0.75 from the Sloan Digital Sky Survey Data Release 15 (SDSS DR15), which contains 184172 CMASS LRGs and 27158 eBOSS LRGs, and examine the environmental dependence of galaxy age and stellar mass in this galaxy sample. I divide this LRG sample into subsamples with a redshift binning size of &#8710;z = 0.01, and analyze the environmental dependence of galaxy age and stellar mass for these subsamples in each redshift bin. Overall, galaxy age and stellar mass in the LRG sample with redshift 0.6 &#8804; z &#8804; 0.75 are very weakly correlated with the local environment, which shows that minimal environmental dependence of galaxy parameters can continue to larger redshifts.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se compila una muestra de galaxias luminosas rojas (LRG) con corrimientos al rojo 0.6 &#8804; z &#8804; 0.75 extraída del Sloan Digital Sky Survey Data Release 15 (SDSS DR15), que contiene 184172 CMASS LRGs y 27158 eBOSS LRGs. Se estudia la dependencia ambiental de las edades de las galaxias de esta muestra y de las masas estelares. Se divide la muestra de LGRs en submuestras usando una &#8710;z = 0.01 y se analiza la dependencia ambiental de las edades de las galaxias y las masas estelares en cada intervalo de z. En general, la correlación de las edades galacticas y las masas estelares en la muestra LRG con 0.6 &#8804; z &#8804; 0.75 con el medio ambiente local es leve, lo que muestra que la mínima dependencia ambiental de los parámetros galácticos puede extenderse a corrimientos al rojo mayores.]]></p></abstract>
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