<?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>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2007001000025</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La radiación del fondo cósmico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Ibarra]]></surname>
<given-names><![CDATA[M.J]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ureña-López]]></surname>
<given-names><![CDATA[L.A]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Guanajuato Instituto de Física ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2007</year>
</pub-date>
<volume>53</volume>
<fpage>133</fpage>
<lpage>136</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2007001000025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2007001000025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2007001000025&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las observaciones de las anisotropías de la Radiación de Fondo Cósmico se han convertido en una herramienta fundamental en cosmología. Aquí presentamos brevemente el formalismo necesario para entender la evolución de las anisotropías, y como su espectro de potencias nos permite conocer la evolución y composición del universo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Observations on the anisotropies of the Cosmic Microwave Background have become a fundamental tool in Cosmology. We present a brief description of the mathematical formulae that is necessary to understand the evolution of the anisotropies, and how their power spectrum gives us information about the evolution and composition of the universe.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cosmología]]></kwd>
<kwd lng="es"><![CDATA[radiación del fondo cósmico]]></kwd>
<kwd lng="es"><![CDATA[perturbaciones cosmológicas]]></kwd>
<kwd lng="en"><![CDATA[Cosmology]]></kwd>
<kwd lng="en"><![CDATA[cosmic microwave background]]></kwd>
<kwd lng="en"><![CDATA[cosmological perturbations]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>La radiaci&oacute;n del fondo c&oacute;smico</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>M.J. Reyes&#150;Ibarra y L.A. Ure&ntilde;a&#150;L&oacute;pez</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Instituto de F&iacute;sica de la Universidad de Guanajuato, </i><i>Le&oacute;n, Guanajuato, 37150 M&eacute;xico, e&#150;mail: <a href="mailto:mreyes@fisica.ugto.mx" target="_blank">mreyes@fisica.ugto.mx</a>, <a href="mailto:lurena@fisica.ugto.mx" target="_blank">lurena@fisica.ugto.mx</a></i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 1 de mayo de 2006    <br>   Aceptado el 1 de noviembre de 2006</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Las observaciones de las anisotrop&iacute;as de la Radiaci&oacute;n de Fondo C&oacute;smico se han convertido en una herramienta fundamental en cosmolog&iacute;a. Aqu&iacute; presentamos brevemente el formalismo necesario para entender la evoluci&oacute;n de las anisotrop&iacute;as, y como su espectro de potencias nos permite conocer la evoluci&oacute;n y composici&oacute;n del universo.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Cosmolog&iacute;a; radiaci&oacute;n del fondo c&oacute;smico; perturbaciones cosmol&oacute;gicas.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Observations on the anisotropies of the Cosmic Microwave Background have become a fundamental tool in Cosmology. We present a brief description of the mathematical formulae that is necessary to understand the evolution of the anisotropies, and how their power spectrum gives us information about the evolution and composition of the universe.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Cosmology; cosmic microwave background; cosmological perturbations.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS:  98.80.&#150;k; 98.80.Jk; 98.80.Es</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v53s4/v53s4a25.pdf">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     ]]></body>
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