<?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>S0185-11012024000200367</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2024.60.02.14</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Preliminary results from 5 years' spectral monitoring of Antares]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oostra]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Batista]]></surname>
<given-names><![CDATA[M. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de los Andes Departamento de Física ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>60</volume>
<numero>2</numero>
<fpage>367</fpage>
<lpage>371</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012024000200367&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012024000200367&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012024000200367&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We present preliminary results of 5 years&#8217; monitoring of the radial velocity of Alpha Sco, performed at the Astronomical Observatory of the Universidad de Los Andes in Bogotá, Colombia. The data include 580 spectra acquired on 153 nights between March 2015 and March 2020. The aim of this study is to probe the dynamics of the star&#8217;s atmosphere on all possible time-scales through the variations of the observed radial velocity. At present, our findings are consistent with previous results from other observers, and the combination of older and new data make it possible to assess several periodicities. A detailed study of these results, including the convective motions in the photosphere, is still in progress.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Presentamos resultados preliminares de 5 años de monitoreo de la velocidad radial de Alpha Sco, realizado en el Observatorio Astronómico de la Universidad de Los Andes en Bogotá, Colombia. Los datos incluyen 580 espectros adquiridos en 153 noches entre marzo de 2015 y marzo de 2020. El objetivo de este estudio es investigar la dinámica de la atmósfera de la estrella en todas las escalas de tiempo posibles a través de las variaciones en la velocidad radial observada. En la actualidad, nuestros hallazgos son consistentes con resultados previos de otros observadores, y la combinación de datos antiguos y nuevos hace posible evaluar las diversas periodicidades. Un estudio detallado de estos resultados, que incluye los movimientos convectivos en la fotósfera, aún está en progreso.]]></p></abstract>
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<kwd lng="en"><![CDATA[stars: atmospheres]]></kwd>
<kwd lng="en"><![CDATA[supergiant]]></kwd>
<kwd lng="en"><![CDATA[techniques: imaging spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[techniques: radial velocities]]></kwd>
</kwd-group>
</article-meta>
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