<?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>S0185-11012016000200247</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Optical polarization study towards the open cluster NGC 6249]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vergne]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orsatti]]></surname>
<given-names><![CDATA[Ana Maria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Feinstein]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega]]></surname>
<given-names><![CDATA[E. Irene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Ruben E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNLP Facultad de Ciencias Astronómicas y Geofísicas Observatorio Astronómico]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNLP Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,CONICET  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>52</volume>
<numero>2</numero>
<fpage>247</fpage>
<lpage>260</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012016000200247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012016000200247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012016000200247&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: We present multicolor linear polarimetric data (U BV RI) of 30 of the brightest stars in the region of the open cluster NGC 6249. The cluster members were found to be part of two subgroups with average polarization and orientation of the electric vector of PV = 1.7% ± 0.13, &#952;V = 39.7° ± 2.2; and PV = 2.34% ± 0.07, &#952;V = 41.0° ± 1.2, respectively. This difference in polarization may be a consequence of the presence of a dark, U-shaped absorbing zone seen on the central region, and probably located in front of, or inside, the cluster. From the study of the evolution of the AV with the distance,we found evidence of the existence of two layers of dust at distances of &#8776; 250 pc and &#8776; 600 pc. The comparison between the polarimetric parameters of NGC 6249 and those of the nearby cluster NGC 6250 showed some coincidences.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Presentamos observaciones polarimétricas lineales en las bandas U BV RI de 30 de las estrellas más brillantes en la dirección del cúmulo abierto NGC 6249. Los miembros del cúmulo son parte de dos subgrupos con valores promedio de polarización y orientación del vector eléctrico de PV = 1.7% ± 0.13, &#952;V = 39.7° ± 2.2; y PV = 2.34% ± 0.07, &#952;V = 41.0° ± 1.2, respectivamente. Esta diferencia en la polarización puede ser consecuencia de la presencia de una zona oscura de absorción en forma de U vista sobre la zona central de la región y, probablemente, localizada delante o en el interior del cúmulo. A partir del estudio de la evolución de la AV con la distancia, encontramos evidencia de la existencia de dos capas de absorción a distancias de aproximadamente 250 pe y 600 pe. La comparación entre los parámetros polarimétricos de NGC 6249 y el cúmulo cercano NGC 6250 mostró algunas coincidencias.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[ISM: dust, extinction]]></kwd>
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