<?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>S0185-11012011000200019</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[An Overview of the Observational and Theoretical Studies of HH 1 and 2]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Raga]]></surname>
<given-names><![CDATA[A. C.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reipurth]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantó]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sierra-Flores]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guzmán]]></surname>
<given-names><![CDATA[M. V.]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ciencias Nucleares ]]></institution>
<addr-line><![CDATA[México D. F.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A02">
<institution><![CDATA[,University of Hawaii at Manoa Institute for Astronomy ]]></institution>
<addr-line><![CDATA[Hilo HI]]></addr-line>
<country>USA</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía ]]></institution>
<addr-line><![CDATA[México D. F.]]></addr-line>
<country>México</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto Finlay  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2011</year>
</pub-date>
<volume>47</volume>
<numero>2</numero>
<fpage>425</fpage>
<lpage>437</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012011000200019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012011000200019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012011000200019&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Presentamos una descripción de la bibliografía sobre los objetos HH 1 y 2, desde el descubrimiento de los objetos HH (por Herbig y Haro en 1951/2) hasta el año 2010. El trabajo sobre HH 1 y 2 traza la historia del campo de los objetos Herbig-Haro, e incluye la mayor parte de los eventos importantes en el desarrollo de nuestro entendimiento de los flujos de estrellas jóvenes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present a description of the bibliography of HH 1 and 2, from the discovery of HH objects (by Herbig and Haro in 1951/2) up to the year 2010. The work on HH 1 and 2 traces the history of the field of Herbig-Haro objects, and includes most of the important developments of our understanding of outflows from young stars.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[ISM]]></kwd>
<kwd lng="en"><![CDATA[ISM]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
<kwd lng="en"><![CDATA[stars]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4"><b>Rese&ntilde;a</b></font></p> 	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="center"><font face="verdana" size="4"><b>An Overview of the Observational and Theoretical Studies of HH 1 and 2</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="center"><font face="verdana" size="2"><b>A. C. Raga,<sup>1</sup> B. Reipurth,<sup>2</sup> J. Cant&oacute;,<sup>3</sup> M. M. Sierra&#150;Flores,<sup>1</sup> and M. V. Guzm&aacute;n<sup>4</sup></b></font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> Instituto de Ciencias Nucleares, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apdo. Postal 70&#150;543, 04510, M&eacute;xico, D. F., Mexico</i> (raga, <a href="mailto:sierra@nucleares.unam.mx">sierra@nucleares.unam.mx</a>).</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>2 </sup>Institute for Astronomy, University of Hawaii at Manoa , 640 N. Aohoku Place, Hilo, HI 96720, USA</i> (<a href="mailto:reipurth@ifA.Hawaii.Edu">reipurth@ifA.Hawaii.Edu</a>).</font></p> 	    <p align="justify"><font face="verdana" size="2"><i><sup>3</sup> Instituto de Astronom&iacute;a, Universidad Nacional Aut&oacute;noma de M&eacute;xico, , Apdo. Postal 70&#150;264, 04510 M&eacute;xico, D. F., M&eacute;xico.</i></font></p> 	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><i><sup>4 </sup>Instituto Finlay, P. O. Box 16017, Cod. 11600, La Habana, Cuba</i> (<a href="mailto:mvguzman@finlay.edu.cu">mvguzman@finlay.edu.cu</a>).</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2">Received 2011 May 23    <br>     Accepted 2011 July 21</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">Presentamos una descripci&oacute;n de la bibliograf&iacute;a sobre los objetos HH 1 y 2, desde el descubrimiento de los objetos HH (por Herbig y Haro en 1951/2) hasta el a&ntilde;o 2010. El trabajo sobre HH 1 y 2 traza la historia del campo de los objetos Herbig&#150;Haro, e incluye la mayor parte de los eventos importantes en el desarrollo de nuestro entendimiento de los flujos de estrellas j&oacute;venes.</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 a description of the bibliography of HH 1 and 2, from the discovery of HH objects (by Herbig and Haro in 1951/2) up to the year 2010. The work on HH 1 and 2 traces the history of the field of Herbig&#150;Haro objects, and includes most of the important developments of our understanding of outflows from young stars.</font></p> 	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b><i>Key Words:</i></b> ISM: jets and outflows &#8212; ISM: kinematics and dynamics &#8212; stars: mass&#150;loss &#8212; stars: pre&#150;main sequence.</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/v47n2/v47n2a19.pdf" target="_blank">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>ACKNOWLEDGMENTS</b></font></p> 	    <p align="justify"><font face="verdana" size="2">AR and JC acknowledge support from the Conacyt grants 61547, 101356 and 101975. We thank an anonymous referee for pointing out several papers on HH 1/2 which we had initially missed. We thank George Herbig for providing the photograph shown in Figure 2.</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">Ambartsumian, V. A. 1954, Comm. Byurakan Obs., 13, 3.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7481328&pid=S0185-1101201100020001900001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p> 	    ]]></body>
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