<?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>S0185-11012007000100003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Photometric and Spectroscopic Study of Shakhbazian Compact Galaxy Groups SHCG 104, SHCG 120, SHCG 223, and SHCG 245]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tovmassian]]></surname>
<given-names><![CDATA[Hrant M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tiersch]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tovmassian]]></surname>
<given-names><![CDATA[Gaghik H.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavushyan]]></surname>
<given-names><![CDATA[V. H.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Neizvestny]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pramskij]]></surname>
<given-names><![CDATA[A. G.]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Papaqui]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<xref ref-type="aff" rid="A05"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rozas]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Astrofísica Óptica y Electrónica  ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Sternwarte Königsleiten  ]]></institution>
<addr-line><![CDATA[München Leimbachstr]]></addr-line>
<country>Germany</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía Observatorio Astronómico Nacional]]></institution>
<addr-line><![CDATA[Ensenada B. C.]]></addr-line>
<country>México</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Special Astrophysical Observatory RAS  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Russia</country>
</aff>
<aff id="A05">
<institution><![CDATA[,Universidad Federal de Santa Catarina Facultad de Física Departamento de Astrofísica]]></institution>
<addr-line><![CDATA[Florianapolis SC]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2007</year>
</pub-date>
<volume>43</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>57</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012007000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012007000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012007000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los grupos compactos de galaxias Shakhbazian son las configuraciones más densas que se conocen. Hace algunos años iniciamos un estudio fotométrico y es-pectroscópico de estos grupos. En este artículo presentamos los resultados de la investigación en los grupos ShCG 104, ShCG 120, ShCG 243 y ShCG 245. Presentamos los corrimientos al rojo de las galaxias miembro, los resultados de la fotometría R, las curvas de brillo superficial-radio efectivo, las masas estimadas, las luminosidades y las razones masa-luminosidad de los grupos, además de algunos parámetros dinámicos como la dispersión de velocidad radial y el tiempo de cruce. Los ShCGs estudiados consisten principalmente de galaxias elípticas y lenticulares. Se muestra que algunas galaxias en estos grupos están en proceso de interacción.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present the results of the detailed photometric and spectroscopic study of Shakhbazian compact galaxy groups ShCG 104, ShCG 120, ShCG 223 and ShCG 245. The redshifts of member galaxies, the results of photometry in R band, the surface-brightness profiles, the curves of isophotal twisting and Fourier parameter a4 are presented. We determined the mass, the luminosity, the mass-to-luminosity ratio, the radial velocity dispersion and the crossing time of groups. Also the morphological types of member galaxies are determined. It is shown that some galaxies in groups are in the process of interaction.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[GALAXIES: CLUSTERS: INDIVIDUAL (SHCG 104, SHCG 120, SHCG 223, SHCG 245)]]></kwd>
<kwd lng="en"><![CDATA[GALAXIES: INTERACTIONS]]></kwd>
<kwd lng="en"><![CDATA[GALAXIES: PHOTOMETRY]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>PHOTOMETRIC AND SPECTROSCOPIC STUDY OF SHAKHBAZIAN COMPACT GALAXY GROUPS SHCG 104, SHCG 120, SHCG 223, AND SHCG 245</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Hrant M. Tovmassian,<sup>1</sup> H. Tiersch,<sup>2</sup> Gaghik H. Tovmassian,<sup>3</sup> V. H. Chavushyan,<sup>1</sup> S. Neizvestny,<sup>4 </sup>A. G. Pramskij,<sup>4</sup> J. P. Torres&#150;Papaqui,<sup>5</sup> and M. Rozas<sup>3</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><sup><i>1</i></sup><i> Instituto Nacional de Astrof&iacute;sica &Oacute;ptica y Electr&oacute;nica, INAOE Apdo. Postal 51 y 216, 72000 Puebla, M&eacute;xico (<a href="mailto:vahram@inaoep.mx">vahram@inaoep.mx</a>, <a href="mailto:hrant@inaoep.mx">hrant@inaoep.mx</a>)</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>2 </sup>Sternwarte K&ouml;nigsleiten, 81477, M&uuml;nchen, Leimbachstr. 1a, Germany (<a href="mailto:htiersch@uni.de">htiersch@uni.de</a>) </i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>3</sup> Observatorio Astron&oacute;mico Nacional, Instituto de Astronom&iacute;a, Universidad Nacional Aut&oacute;noma de M&eacute;xico, OAN,  22800, Ensenada, B. C., M&eacute;xico (<a href="mailto:maite@astrosen.unam.mx">maite@astrosen.unam.mx</a>, <a href="mailto:gag@astrosen.unam.mx">gag@astrosen.unam.mx</a>) </i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>4</sup> Special Astrophysical Observatory RAS, Nizhnij Arkhyz, Karachai&#150;Cherkessia, 357147 Russia (<a href="mailto:neiz@sao.ru">neiz@sao.ru</a>, <a href="mailto:prams@sao.ru">prams@sao.ru</a>) SAO, RAS, Russia.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>5</sup> Departamento de Astrof&iacute;sica, Universidad Federal de Santa Catarina, Facultad de F&iacute;sica, C.P. 476, Florianapolis, SC, Brazil.</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Received 2006 May 3    <br> Accepted 2006 October 9</font></p>     <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 grupos compactos de galaxias Shakhbazian son las configuraciones m&aacute;s densas que se conocen. Hace algunos a&ntilde;os iniciamos un estudio fotom&eacute;trico y es&#150;pectrosc&oacute;pico de estos grupos. En este art&iacute;culo presentamos los resultados de la investigaci&oacute;n en los grupos ShCG 104, ShCG 120, ShCG 243 y ShCG 245. Presentamos los corrimientos al rojo de las galaxias miembro, los resultados de la fotometr&iacute;a R, las curvas de brillo superficial&#150;radio efectivo, las masas estimadas, las luminosidades y las razones masa&#150;luminosidad de los grupos, adem&aacute;s de algunos par&aacute;metros din&aacute;micos como la dispersi&oacute;n de velocidad radial y el tiempo de cruce. Los ShCGs estudiados consisten principalmente de galaxias el&iacute;pticas y lenticulares. Se muestra que algunas galaxias en estos grupos est&aacute;n en proceso de interacci&oacute;n.</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">We present the results of the detailed photometric and spectroscopic study of Shakhbazian compact galaxy groups ShCG 104, ShCG 120, ShCG 223 and ShCG 245. The redshifts of member galaxies, the results of photometry in R band, the surface&#150;brightness profiles, the curves of isophotal twisting and Fourier parameter <i>a</i><sub>4</sub> are presented. We determined the mass, the luminosity, the mass&#150;to&#150;luminosity ratio, the radial velocity dispersion and the crossing time of groups. Also the morphological types of member galaxies are determined. It is shown that some galaxies in groups are in the process of interaction.</font></p>     <p align="justify"><font face="verdana" size="2"><b><i>Key Words:</i></b> GALAXIES: CLUSTERS: INDIVIDUAL (SHCG 104, SHCG 120, SHCG 223, SHCG 245) &#151; GALAXIES: INTERACTIONS &#151; GALAXIES: PHOTOMETRY</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><a href="/pdf/rmaa/v43n1/v43n1a3.pdf">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>ACKNOWLEDGEMENTS</b></font></p>     <p align="justify"><font face="verdana" size="2">We thank the anonymous referee for valuable comments. HMT acknowledges CONACYT for financial support by Project 201&#150;PY.44376/A&#150;1. HT is grateful to the DFG for the grant MEX 111/1/98. SN thanks Mr. O.Beck for private financial support.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>REFERENCES</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">Abell, G. 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