<?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>S0185-11012019000200141</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2019.55.02.02</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Interstellar absorption towards the Novae V339 Del and V5668 SGR]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jack]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schröder]]></surname>
<given-names><![CDATA[K.-P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guanajuato Departamento de Astronomía ]]></institution>
<addr-line><![CDATA[Guanajuato ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universität Hamburg Hamburger Sternwarte ]]></institution>
<addr-line><![CDATA[Hamburg ]]></addr-line>
<country>Germany</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>55</volume>
<numero>2</numero>
<fpage>141</fpage>
<lpage>149</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012019000200141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012019000200141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012019000200141&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT We present a search and study of interstellar (IS) absorption features in the observed spectra of two Novae V339 Del and V5668 Sgr. We obtained high reslution spectra (R &#8776; 20, 000) in the wavelength range between 3800 and 8800 Å of both novae with the TIGRE telescope. Common IS features of Na I and Ca II were identified in both novae, and the Ca II H and K features of Nova V339 Del show substructures, while a blueshifted absorption feature was found in the spectra of Nova V5668 Sgr. Absorption of K I was identified only in the spectra of Nova V5668 Sgr. The DIBs 6196, 6203, 6379, 6614 and 7562 were found in both novae, and in the spectra of Nova V5668 Sgr we could also identify the DIBs 5780, 5797 and 6660. We present the equivalent widths of all features and determined the column densities of Ca II, K I and hydrogen in the direction of Nova V5668 Sgr (log NCA II = 12.50, log NK I = 11.55, log NH = 18.5).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Presentamos una búsqueda y un estudio de características de absorción interestelar (IS) en los espectros de las novas V339 Del y V5668 Sgr. Obtuvimos espectros de alta resolución (R &#8776; 20, 000) en el intervalo de longitud de onda de 3800 a 8800 Å con el telescopio TIGRE. Identificamos las características IS comunes de Na I y Ca II; las características de Ca II H y K muestran subestructuras en la Nova V339 Del, mientras que encontramos una segunda característica de absorción en los espectros de la Nova V5668 Sgr. Se identificó absorción de K I sólo en los espectros de la Nova V5668 Sgr. Las DIBs 6196, 6203, 6379, 6614 y 7562 se encon-traron en ambas novas, y en los espectros de la Nova V5668 Sgr pudimos también identificar las DIBs 5780, 5797 y 6660. Presentamos los anchos equivalentes de todas las características y determinamos las densidades de columna de Ca II, K I e hidrógeno en la dirección de la nova V5668 Sgr (log NCA II = 12.50, log NK I = 11.55, log NH = 18.5).]]></p></abstract>
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<kwd lng="en"><![CDATA[novae]]></kwd>
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