<?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>1870-3542</journal-id>
<journal-title><![CDATA[Revista mexicana de física E]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fís. E]]></abbrev-journal-title>
<issn>1870-3542</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-35422012000100005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Materia oscura escalar compleja (parte I): la versión hidrodinámica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Meza]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Almada]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Matos]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Investigaciones Nucleares Departamento de Física ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional Departamento de Física ]]></institution>
<addr-line><![CDATA[México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>58</volume>
<numero>1</numero>
<fpage>53</fpage>
<lpage>60</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-35422012000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-35422012000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-35422012000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo utilizamos las ecuaciones hidrodinámicas de Euler para modelar halos de materia oscura escalar compleja en el Universo, las cuales adquieren la forma de un sistema Schrodinger-Poisson en el límite Newtoniano. Mediante la transformación de Madelung, dicho sistema adopta la forma de la dinámica de un fluido, en donde interviene un potencial de auto-interacción y un potencial tipo cuántico que depende no linealmente de la densidad del fluido. En este marco teórico se hace un análisis de inestabilidad de Jeans, el cual sirve para determinar el tamaño mínimo para que el sistema sea estable, es decir, para que perturbaciones del campo escalar formen estructuras.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this work we use the Euler hydrodynamic equations of fluids to study a model of galactic halos minimally coupled to a complex scalar field, which in the Newtonian limit they become the Schrodinger-Poisson system. Applying a Madelung transformation, this system of equations takes the form of hydrodynamics equations, where there are a self-interacting potential and a kind of quantum potential that depends non-linearly on the density of the fluid. In this theoretical framework we analyze the Jeans' instability, which is useful for finding the scale length of perturbations of the scalar field that will form structures. In other words, perturbations of the scalar field with lengths less than this threshold length, can not lead to the formation of galactic structures.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Campos escalares]]></kwd>
<kwd lng="es"><![CDATA[materia oscura]]></kwd>
<kwd lng="es"><![CDATA[modelo de fluido]]></kwd>
<kwd lng="es"><![CDATA[inestabilidad de Jeans]]></kwd>
<kwd lng="en"><![CDATA[Scalar fields]]></kwd>
<kwd lng="en"><![CDATA[dark matter]]></kwd>
<kwd lng="en"><![CDATA[fluid model]]></kwd>
<kwd lng="en"><![CDATA[Jeans' instability]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Ense&ntilde;anza</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Materia oscura escalar compleja (parte I): la versi&oacute;n hidrodin&aacute;mica</b></font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>M.A. Rodr&iacute;guez&#45;Meza<sup>a</sup>, A. Hern&aacute;ndez&#45;Almada<sup>b</sup> y T. Matos<sup>b</sup></b></font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>a</sup> Departamento de F&iacute;sica, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18&#45;1027, M&eacute;xico D.F. 11801, M&eacute;xico, e&#45;mail:</i> <a href="mailto:marioalberto.rodriguez@inin.gob.mx">marioalberto.rodriguez@inin.gob.mx</a> </font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b </sup>Departamento de F&iacute;sica, Centro de Investigaci&oacute;n y de Estudios Avanzados del Instituto Polit&eacute;cnico Nacional, Apartado Postal 14&#45;740, 07000 M&eacute;xico City, </i></font><font face="verdana" size="2"><i>M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 28 de julio de 2011;     <br> Aceptado el 5 de marzo de 2012</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>     <p align="justify"><font face="verdana" size="2">En este trabajo utilizamos las ecuaciones hidrodin&aacute;micas de Euler para modelar halos de materia oscura escalar compleja en el Universo, las cuales adquieren la forma de un sistema Schrodinger&#45;Poisson en el l&iacute;mite Newtoniano. Mediante la transformaci&oacute;n de Madelung, dicho sistema adopta la forma de la din&aacute;mica de un fluido, en donde interviene un potencial de auto&#45;interacci&oacute;n y un potencial tipo cu&aacute;ntico que depende no linealmente de la densidad del fluido. En este marco te&oacute;rico se hace un an&aacute;lisis de inestabilidad de Jeans, el cual sirve para determinar el tama&ntilde;o m&iacute;nimo para que el sistema sea estable, es decir, para que perturbaciones del campo escalar formen estructuras.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Campos escalares; materia oscura; modelo de fluido; inestabilidad de Jeans.</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">In this work we use the Euler hydrodynamic equations of fluids to study a model of galactic halos minimally coupled to a complex scalar field, which in the Newtonian limit they become the Schrodinger&#45;Poisson system. Applying a Madelung transformation, this system of equations takes the form of hydrodynamics equations, where there are a self&#45;interacting potential and a kind of quantum potential that depends non&#45;linearly on the density of the fluid. In this theoretical framework we analyze the Jeans' instability, which is useful for finding the scale length of perturbations of the scalar field that will form structures. In other words, perturbations of the scalar field with lengths less than this threshold length, can not lead to the formation of galactic structures.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Scalar fields; dark matter; fluid model; Jeans' instability.</font></p>  	    ]]></body>
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