<?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>S0185-11012018000100002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The variable star population in the globular cluster NGC 6934]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yepez]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arellano Ferro]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muneer]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giridhar]]></surname>
<given-names><![CDATA[Sunetra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Indian Institute of Astrophysics  ]]></institution>
<addr-line><![CDATA[Bangalore ]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>54</volume>
<numero>1</numero>
<fpage>0</fpage>
<lpage>0</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012018000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012018000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012018000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We report an analysis of new V and I CCD time-series photometry of the globular cluster NGC 6934. Through the Fourier decomposition of the RR Lyrae light curves the mean values of [Fe/H] and the distance of the cluster were estimated; we found: [Fe/H]UV ES=&#8722;1.48±0.14 and d=16.03 ± 0.42 kpc, and [Fe/H]UV ES=&#8722;1.43±0.11 and d=15.91±0.39 kpc, from the calibrations of RRab and RRc stars respectively. Independent distance estimations from SX Phe and SR stars are also discussed. Individual absolute magnitudes, radii and masses are also reported for RR Lyrae stars. We found 12 new variables: 4 RRab, 3 SX Phe, 2 W Virginis (CW) and 3 semi-regular (SR). The inter-mode or &#8220;either-or&#8221; region in the instability strip is shared by the RRab and RRc stars. This characteristic, observed only in some OoI clusters and never seen in an OoII, is discussed in terms of mass distribution in the ZAHB.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Reportamos un análisis de la serie temporal de fotometría CCD en los filtros V e I del cúmulo globular NGC 6934. A través de la descomposición de Fourier de las curvas de luz de las estrellas RR Lyrae, obtuvimos los valores medios de [Fe/H] y la distancia al cúmulo; [Fe/H]UV ES=&#8722;1.48±0.14 y d=16.03±0.42 kpc, y [Fe/H]UV ES=&#8722;1.43±0.11 y d=15.91±0.39 kpc, a partir de las calibraciones de estrellas RRab y RRc, respectivamente. También reportamos valores de la distancia obtenidas con estrellas SX Phe y SR. Calculamos valores de las magnitudes absolutas, radios y masas para estrellas RR Lyrae individuales. Encontramos 12 nuevas variables: 4 RRab, 3 SX Phe, 2 W Virginis (CW) y 3 semi-regular (SR). La región inter-modo en la zona de inestabilidad es compartida por las estrellas RRab y RRc. Esta característica, observada solamente en algunos cúmulos OoI y nunca vista en OoII, se discute en términos de distribución de masa en el ZAHB.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[globular clusters]]></kwd>
<kwd lng="en"><![CDATA[individual]]></kwd>
<kwd lng="en"><![CDATA[NGC 6934]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
<kwd lng="en"><![CDATA[variables]]></kwd>
<kwd lng="en"><![CDATA[RR Lyrae]]></kwd>
</kwd-group>
</article-meta>
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