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Orbital periods, angular separations and mass ratios are estimated for each sub-system. Orbital elements are given when available. The catalogue can be accessed through CDS (Strasbourg). Half of the systems are within 100 pc from the Sun. The comparison of the periods of close and wide sub-systems reveals that there is no preferred period ratio and all possible combinations of periods are found. The distribution of the logarithms of short periods is bimodal, probably due to observational selection. In 82% of triple stars the close sub-system is related to the primary of a wide pair. However, the analysis of mass ratio distribution gives some support to the idea that component masses are independently selected from the Salpeter mass function. Orbits of wide and close sub-systems are not always coplanar, although the corresponding orbital angular momentum vectors do show a weak tendency of alignment. 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Ser., 124 1 (1997) 75-84</a> <img src="/media/system/images/arrow.png" alt="" /> <span>Abstract</span></div> <div id="content" class="id-101 full"> <div> <nav class="nav-article nav-buttons"> <ul class="menu"> <li class="item-283"><a href="/component/issues/?task=all" >All issues</a></li><li class="item-243 deeper parent"><span class="separator">About this journal</span> <ul><li class="item-278"><a href="/about-this-journal/aims-and-scope" >Aims and scope</a></li><li class="item-274"><a href="/about-this-journal/indexed-in" >Indexed in</a></li><li class="item-188"><a href="/about-this-journal/copyright-transfer" >Copyright transfer</a></li></ul></li><li class="item-263"><a href="/component/services/" >Reader's services</a></li></ul> </nav> <div id="system-message-container"> </div> <div class="flexme flexme-article"> <div class="article-content"> <div> <div class="special_article green">Free Access</div> </div> <div class="summary " > <table> <tr> <th valign="top"> Issue </th> <td width="10"></td> <td> <div> Astron. Astrophys. Suppl. Ser. </div> <div><strong>Volume </strong>124, Number <strong>1</strong>, July 1997 </div> </td> <tr><td colspan="3" ></td></tr> <tr><td colspan="3" class="sep_issue"></td></tr> </tr> <tr> <th> Page(s) </th> <td></td> <td>75 - 84</td> </tr> <tr> <th>DOI</th> <td></td> <td> <a href="https://doi.org/10.1051/aas:1997181"> https://doi.org/10.1051/aas:1997181 </a> </td> </tr> <tr> <th>Published online</th> <td></td> <td> 15 July 1997 </td> </tr> </table> </div> <div id="article"> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> <div id="contenu-min"> <div id="head"> <i>Astron. Astrophys. Suppl. Ser.</i> <b>124</b>, 75-84 (1997)<h2 class="title">MSC - a catalogue of physical multiple stars<sup><a href="/articles/aas/abs/1997/10/ds1218/ds1218.html#FN1">*</a></sup> </h2> <div class="article-authors"><p class="bold"><span id="ds1218-author-1" data-url="/component/author/?dkey=10.1051/aas:1997181&n=1" class="author">A. A. Tokovinin</span><sup>1</sup><sup>,2</sup></p></div> <p class="aff"> <sup>1</sup> Sternberg Astronomical Institute, Universitetsky prosp., 13, 119899 Moscow Russia <br> <sup>2</sup> Observatoire de Grenoble, Université Joseph Fourier, BP 53, F-38041 Grenoble Cedex 9, France <br></p> <p class="corresp">Send offprint request to: Tokovinin (Sternberg Institute address).</p> <p class="history"><span class="bold">Received: </span> 9 May 1996 <br><span class="bold">Accepted: </span> 23 October 1996 </p> <p class="bold"><a name="abs"></a>Abstract</p> <p> The MSC catalogue contains data on 612 physical multiple stars of multiplicity 3 to 7 which are hierarchical with few exceptions. Orbital periods, angular separations and mass ratios are estimated for each sub-system. Orbital elements are given when available. The catalogue can be accessed through CDS (Strasbourg). Half of the systems are within 100 pc from the Sun. The comparison of the periods of close and wide sub-systems reveals that there is no preferred period ratio and all possible combinations of periods are found. The distribution of the logarithms of short periods is bimodal, probably due to observational selection. In 82% of triple stars the close sub-system is related to the primary of a wide pair. However, the analysis of mass ratio distribution gives some support to the idea that component masses are independently selected from the Salpeter mass function. Orbits of wide and close sub-systems are not always coplanar, although the corresponding orbital angular momentum vectors do show a weak tendency of alignment. Some observational programs based on the MSC are suggested. </p> <div class="kword"><p><span class="bold">Key words: </span>binaries: general / catalog</p></div> <div class="note"> <hr width="30%" align="left"> <div> <a name="FN1"></a><sup>*</sup> <p class="ligne">Tables 2 and 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html</p> </div> <div> <a name=""></a><p><a href="http://cdsweb.u-strasbg.fr/htbin/myqcat3?J/A+AS/124/75" target="_blank">Tables at the CDS</a></p> </div> </div> </div> <p><i>© European Southern Observatory (ESO), 1997</i></p> </div> </div> </div> <nav class="article"> <div class="module_title"> <a href="/">Homepage</a> </div> <div class="nav-section"><div class="title_toc"><a href="/articles/aas/abs/1997/10/contents/contents.html">Table of Contents</a></div><div class="module_nav"><a href="/articles/aas/abs/1997/10/ds1286/ds1286.html" class="back"><span></span>Previous article</a><a href="/articles/aas/abs/1997/10/ds1274/ds1274.html" class="forth">Next article<span></span></a><div class="clear"></div></div></div> <div class="nav-section files"> <h2>Article contents</h2><div class="article_doc"><ul><li><a href="/articles/aas/abs/1997/10/ds1218/ds1218.html" title="Abstract" class="current">Abstract</a></li><li><a href="/articles/aas/full/1997/10/ds1218/ds1218.html" title="Full HTML">Full HTML</a></li><li><a href="/articles/aas/pdf/1997/10/ds1218.pdf" title="PDF (355.6 KB)">PDF (355.6 KB)</a></li></ul> </div> </div> <div class="nav-section databases"> <h2>Database links</h2><div class="article_doc"><ul><li><a href="http://cdsweb.u-strasbg.fr/htbin/myqcat3?J/A+AS/124/75" title="Tables available from the Strasbourg astronomical Data Center (CDS)" class="related-database-link" target="_blank">Tables at CDS</a></li><li><a href="https://ui.adsabs.harvard.edu/#abs/1997A%26AS..124...75T" title="Article abstracts available on the Astrophysics Data System" class="related-database-link" target="_blank">NASA ADS Abstract Service</a></li></ul> </div> </div> <div class="nav-section servs"><h2>Services</h2><ul><li><strong>Articles citing this article</strong><br /><div style="margin-left:8px"><a href="https://aas.aanda.org/component/citedby/?task=crossref&doi=10.1051/aas:1997181">CrossRef (215)</a></div></li><li><strong>Same authors</strong><br /><div style="margin-left:8px">- <a href="https://aas.aanda.org/component/solr/?task=authors&tool=google&dkey=10.1051/aas:1997181" target="_blank">Google Scholar</a></div><div style="margin-left:8px">- <a href="https://aas.aanda.org/component/solr/?task=authors&dkey=10.1051/aas:1997181" target="_blank">EDP Sciences database</a></div><div style="margin-left:8px">- <a href="https://aas.aanda.org/component/solr/?task=authors&tool=pubmed&dkey=10.1051/aas:1997181" target="_blank">PubMed</a></div></li><div class="separator"></div><li><a href="https://aas.aanda.org/component/recommend/?type=article&dkey=10.1051/aas:1997181">Recommend this article</a></li><li><a href="https://aas.aanda.org/component/makeref/?task=show&type=html&doi=10.1051/aas:1997181">Download citation</a></li></ul> </div> <div class="nav-section related"> <h2>Related Articles</h2> <script type="text/javascript"> jQuery(function ($) { $(document).ready(function() { $('.nav-toggle').click(function() { var collapse_content_selector = $(this).attr('href'); var toggle_switch = $(this); $(collapse_content_selector).toggle(function() { if ($(this).css('display') == 'none') { toggle_switch.html('More'); } else { toggle_switch.html('Less'); } }); }); }); }); </script> <div class="articles"> <a href="https://www.aanda.org/articles/aa/abs/2002/04/aa2013/aa2013.html" class="title">Statistics of spectroscopic sub-systems in visual multiple stars</a> <br /> A&A 382, 118-123 (2002)<br /> <div class="separator"></div> <a href="https://www.aanda.org/articles/aa/abs/2006/17/aa4427-05/aa4427-05.html" class="title">Tertiary companions to close spectroscopic binaries</a> <br /> A&A 450, 681-693 (2006)<br /> <div class="separator"></div> <a href="https://www.aanda.org/articles/aa/abs/2002/12/aa2174/aa2174.html" class="title">Relative orientation of orbits in triple stars</a> <br /> A&A 384, 1030-1037 (2002)<br /> <div class="separator"></div> </div> <div id="searchmlt" class="articles" style="display:none"> <div class="separator"></div> <a href="https://www.aanda.org/articles/aa/abs/2014/03/aa22840-13/aa22840-13.html" class="title">Spectroscopic study of early-type multiple stellar systems — I. Orbits of spectroscopic binary subsystems</a> <br /> A&A 563, A138 (2014)<br /> <div class="separator"></div> <a href="https://www.aanda.org/articles/aa/abs/2001/28/aa1365/aa1365.html" class="title">New spectroscopic components in multiple systems. 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