<?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>S0185-11012014000100009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A spallation model for 44TI production in core collapse supernovae]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ouyed]]></surname>
<given-names><![CDATA[A.]]></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 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[Jaikumar]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,University of Calgary Department of Physics and Astronomy ]]></institution>
<addr-line><![CDATA[Calgary Alberta]]></addr-line>
<country>Canada</country>
</aff>
<aff id="A02">
<institution><![CDATA[,California State University Department of Physics and Astronomy ]]></institution>
<addr-line><![CDATA[Long Beach CA]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2014</year>
</pub-date>
<volume>50</volume>
<numero>1</numero>
<fpage>77</fpage>
<lpage>85</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012014000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012014000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012014000100009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los modelos actuales para supernovas con colapso del núcleo (ccSNe) predicen abundancias excesivas de 44Ti comparadas con las observadas. Presentamos un modelo alternativo, en el cual la detonación de una estrella neutrón (Nova Quark o QN) sigue a la explosión de la ccSNe, lo cual tiene como resultado reacciones de espalación en el material arrojado por la SN, que producen 44Ti. Con nuestro modelo y con un retraso adecuado en el tiempo entre la QN y la SN, logramos una producción de 44Ti de ~ 10-4 M&#8857;. Nuestro modelo también produce señales únicas, que no se encuentran en los modelos estándar de nucleosíntesis en ccSNe. Ejemplos de estas señales son una abundante producción de 7Be y 22Na. Discutimos estas señales mediante el análisis de las curvas de luz tardías y la espectroscopía en rayos gama para nuestro modelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Current core collapse supernovae (cc-SNe) models predict overproduction of 44Ti compared to observations. We present a model for an alternative channel where a cc-SN explosion is followed by a neutron star detonation (QuarkNovaor QN), resulting in a spallation reaction of SN ejecta that produces 44Ti. We can achieve a 44Ti production of ~ 10-4 M&#8857; with our model under the right time delay between the QN and the SN. Our model also produces unique signals not found in standard, cc-SN nucleosynthesis models. Some of these unique signals include a significantly large production of 7Be and 22Na. We discuss some of these signals by analyzing the late time light curve and gamma spectroscopy of our model.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nuclear reactions]]></kwd>
<kwd lng="en"><![CDATA[nucleosynthesis]]></kwd>
<kwd lng="en"><![CDATA[abundances]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
<kwd lng="en"><![CDATA[supernovae]]></kwd>
<kwd lng="en"><![CDATA[supernovae]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="center"><font face="verdana" size="4"><b>A spallation model for <sup>44</sup>TI production in core collapse supernovae</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>A. Ouyed,<sup>1</sup> R. Ouyed,<sup>1</sup> D. Leahy,<sup>1</sup> and P. Jaikumar<sup>2</sup></b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N1N4 Canada.</i> (<a href="mailto:leahy@ucalgary.ca">leahy@ucalgary.ca</a>, <a href="mailto:ahouyedh@ucalgary.ca">ahouyedh@ucalgary.ca</a>, <a href="mailto:rouyed@ucalgary.ca">rouyed@ucalgary.ca</a>).</font></p>  	    <p align="justify"><font face="verdana" size="2"><i><sup>2</sup> Department of Physics and Astronomy, California State University, Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, USA</i>. (<a href="mailto:Prashanth.Jaikumar@csulb.edu">Prashanth.Jaikumar@csulb.edu</a>).</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Received 2013 August 11.    <br> 	Accepted 2013 December 9.</font></p>  	    ]]></body>
<body><![CDATA[<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">Los modelos actuales para supernovas con colapso del n&uacute;cleo (ccSNe) predicen abundancias excesivas de <sup>44</sup>Ti comparadas con las observadas. Presentamos un modelo alternativo, en el cual la detonaci&oacute;n de una estrella neutr&oacute;n (Nova Quark o QN) sigue a la explosi&oacute;n de la ccSNe, lo cual tiene como resultado reacciones de espalaci&oacute;n en el material arrojado por la SN, que producen <sup>44</sup>Ti. Con nuestro modelo y con un retraso adecuado en el tiempo entre la QN y la SN, logramos una producci&oacute;n de <sup>44</sup>Ti de &#126; 10<sup>&#45;4</sup> M&#8857;. Nuestro modelo tambi&eacute;n produce se&ntilde;ales &uacute;nicas, que no se encuentran en los modelos est&aacute;ndar de nucleos&iacute;ntesis en ccSNe. Ejemplos de estas se&ntilde;ales son una abundante producci&oacute;n de <sup>7</sup>Be y <sup>22</sup>Na. Discutimos estas se&ntilde;ales mediante el an&aacute;lisis de las curvas de luz tard&iacute;as y la espectroscop&iacute;a en rayos gama para nuestro modelo.</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">Current core collapse supernovae (cc&#45;SNe) models predict overproduction of <sup>44</sup>Ti compared to observations. We present a model for an alternative channel where a cc&#45;SN explosion is followed by a neutron star detonation (QuarkNovaor QN), resulting in a spallation reaction of SN ejecta that produces <sup>44</sup>Ti. We can achieve a <sup>44</sup>Ti production of &#126; 10<sup>&#45;4</sup> M&#8857; with our model under the right time delay between the QN and the SN. Our model also produces unique signals not found in standard, cc&#45;SN nucleosynthesis models. Some of these unique signals include a significantly large production of <sup>7</sup>Be and <sup>22</sup>Na. We discuss some of these signals by analyzing the late time light curve and gamma spectroscopy of our model.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key Words:</b> nuclear reactions, nucleosynthesis, abundances &#151; stars: pre&#45;main sequence &#151; supernovae: general &#151; supernovae: individual (SN1987A, Cassiopeia A).</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmaa/v50n1/v50n1a9.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
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