<?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>S0185-11012014000200003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Quark nova interpretation of the 13 keV emission feature seen in three AXPs: 1E 1048.1-5937, XTE J1810-197 and 4U 0142+61]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Koning]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leahy]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ouyed]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,University of Calgary Department of Physics and Astronomy ]]></institution>
<addr-line><![CDATA[Calgary AB]]></addr-line>
<country>Canada</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2014</year>
</pub-date>
<volume>50</volume>
<numero>2</numero>
<fpage>189</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012014000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012014000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012014000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Tres pulsares de rayos X anómalos (AXPs) muestran, durante el estallido, líneas de emisión intensas en sus espectros. Notablemente, en los tres casos las líneas observadas ocurren en 13 keV. Esta coincidencia es un argumento en contra de la interpretación usual de su origen en términos de emisión protón-ciclotrón. En trabajos previos, Koning et al. han analizado la línea con una interpretación atómica para su origen, y han derivado restricciones sobre la energía en la línea y el ambiente del estallido. Con base en esos trabajos examinamos la interpretación atómica a la luz del modelo de la nova-quark para los AXPs. Encontramos que la emisión es congruente con la ubicación del disco, la composición y la temperatura esperadas alrededor de los AXPs según este modelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Three anomalous X-ray pulsars (AXPs) have significant emission lines in their burst spectra. Remarkably, the line occurs at 13 keV in all cases. This coincidence argues against the common proton-cyclotron interpretation of its origin. Previous work by Koning et al. has analysed the line using an atomic interpretation and derived constraints on the line energy and bursting environment. We build upon this work and examine the atomic interpretation in light of the quark nova model for AXPs. We find that the emission is consistent with the disk location, composition and temperature expected around AXPs in this model.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[stars]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="center"><font face="verdana" size="4"><b>Quark nova interpretation of the 13 keV emission feature seen in three AXPs: 1E 1048.1&#45;5937, XTE J1810&#45;197 and 4U 0142+61</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>N. Koning, D. Leahy, and R. Ouyed</b></font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><i>Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada (nico.koning, leahy,</i> <a href="mailto:rouyed@ucalgary.ca">rouyed@ucalgary.ca</a><i>).</i></font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2">Received 2014 January 8.    <br> 	Accepted 2014 March 7.</font></p>  	    <p>&nbsp;</p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>RESUMEN</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Tres pulsares de rayos X an&oacute;malos (AXPs) muestran, durante el estallido, l&iacute;neas de emisi&oacute;n intensas en sus espectros. Notablemente, en los tres casos las l&iacute;neas observadas ocurren en 13 keV. Esta coincidencia es un argumento en contra de la interpretaci&oacute;n usual de su origen en t&eacute;rminos de emisi&oacute;n prot&oacute;n&#45;ciclotr&oacute;n. En trabajos previos, Koning et al. han analizado la l&iacute;nea con una interpretaci&oacute;n at&oacute;mica para su origen, y han derivado restricciones sobre la energ&iacute;a en la l&iacute;nea y el ambiente del estallido. Con base en esos trabajos examinamos la interpretaci&oacute;n at&oacute;mica a la luz del modelo de la nova&#45;quark para los AXPs. Encontramos que la emisi&oacute;n es congruente con la ubicaci&oacute;n del disco, la composici&oacute;n y la temperatura esperadas alrededor de los AXPs seg&uacute;n este modelo.</font></p>      <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>ABSTRACT</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Three anomalous X&#45;ray pulsars (AXPs) have significant emission lines in their burst spectra. Remarkably, the line occurs at 13 keV in all cases. This coincidence argues against the common proton&#45;cyclotron interpretation of its origin. Previous work by Koning et al. has analysed the line using an atomic interpretation and derived constraints on the line energy and bursting environment. We build upon this work and examine the atomic interpretation in light of the quark nova model for AXPs. We find that the emission is consistent with the disk location, composition and temperature expected around AXPs in this model.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key Words:</b> stars: individual (XTE J1810&#45;197, 4U 0142+61, 1E 1048.1&#45;5937) &#151; stars: magnetic field &#151; stars: neutron</font>.</p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmaa/v50n2/v50n2a3.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>REFERENCES</b></font></p>  	    ]]></body>
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