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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">AM Herculis</span></h1>
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</style><div id="coordinates" class="coordinates"><a class="external text" href="https://geohack.toolforge.org/skyhack.php?ra=18.270348611111&de=49.867988888889&size=0.0033333333333333&name=AM+Herculis&object=AM%20Herculis&_globe:=">Datenbanklinks zu AM Herculis</a></div>
<table aria-label="Kenndaten des Sterns" class="wikitable infobox hintergrundfarbe-basis float-right ibtable">
<tbody><tr>
<th colspan="2" class="ibheader"><a href="Doppelstern" title="Doppelstern">Doppelstern</a><br> AM Herculis
</th></tr>
<tr style="display:none;">
<td colspan="2" class="notheme ibimage">
</td></tr>
<tr style="display:none;">
<td colspan="2" class="ibimgtxt">
</td></tr>
<tr>
<td colspan="2" class="ibmap notheme"><div class="notheme" style="position: relative; width: 330px; margin: auto; float: ; clear: ; background:#ffffff;"><div style="position: absolute; left: 102px; top: 48px; padding: 0;"><span class="mw-valign-top" typeof="mw:File"></span></div><span typeof="mw:File"></span></div>
</td></tr>
<tr style="display:none;">
<td colspan="2" class="ibmaptxt notheme">{{{Kartentext}}}
</td></tr>
<tr>
<td colspan="2" style="text-align:center;"><a rel="nofollow" class="external text" href="https://aladin.cds.unistra.fr/AladinLite/?target=18%2016%2013.255%20%2B49%2052%2004.760&fov=0.005&survey=CDS%2FP%2FDSS2%2Fcolor">AladinLite</a>
</td></tr>
<tr>
<th colspan="2" class="ibheader">Beobachtungsdaten<br><small><a href="%C3%84quinoktium" title="Äquinoktium">Äquinoktium</a>: <a href="Epoche_(Astronomie)#Standardepochen" title="Epoche (Astronomie)">J2000.0</a>, <a href="Epoche_(Astronomie)" title="Epoche (Astronomie)">Epoche</a>: J2000.0</small>
</th></tr>
<tr>
<td><a href="Sternbild" title="Sternbild">Sternbild</a>
</td>
<td class="ibnowrap"><a href="Herkules_(Sternbild)" title="Herkules (Sternbild)">Herkules</a>
</td></tr>
<tr>
<td><a href="Rektaszension" title="Rektaszension">Rektaszension</a>
</td>
<td class="ibnowrap">18h 16m 13,255s <sup id="cite_ref-Simbad_1-0" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td><a href="Deklination_(Astronomie)" title="Deklination (Astronomie)">Deklination</a>
</td>
<td class="ibnowrap">+49° 52′ 04,760″ <sup id="cite_ref-Simbad_1-0" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td><a href="Scheinbare_Gr%C3%B6%C3%9Fe" title="Scheinbare Größe">Winkelausdehnung</a>
</td>
<td class="ibnowrap">{{{Winkel}}} <a href="Winkelsekunde" title="Winkelsekunde">mas</a>
</td></tr>
<tr style="display:none;">
<td>Bekannte <a href="Exoplanet" title="Exoplanet">Exoplaneten</a>
</td>
<td class="ibnowrap">{{{Planeten}}}
</td></tr>
<tr>
<th colspan="2" class="ibheader">Helligkeiten
</th></tr>
<tr>
<td><a href="Scheinbare_Helligkeit" title="Scheinbare Helligkeit">Scheinbare Helligkeit</a>
</td>
<td class="ibnowrap">12.3 (12.3 bis 15.7) mag<sup id="cite_ref-Simbad_1-1" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-VSXEntry_2-0" class="reference"><a href="#cite_note-VSXEntry-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System" title="UBV-System">Helligkeit (U-Band)</a>
</td>
<td class="ibnowrap">{{{magU}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System" title="UBV-System">Helligkeit (B-Band)</a>
</td>
<td class="ibnowrap">{{{magB}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System" title="UBV-System">Helligkeit (V-Band)</a>
</td>
<td class="ibnowrap">{{{magV}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System#Erweiterungen" title="UBV-System">Helligkeit (R-Band)</a>
</td>
<td class="ibnowrap">{{{magR}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System#Erweiterungen" title="UBV-System">Helligkeit (I-Band)</a>
</td>
<td class="ibnowrap">{{{magI}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (J-Band)</a>
</td>
<td class="ibnowrap">{{{magJ}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (H-Band)</a>
</td>
<td class="ibnowrap">{{{magH}}} mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (K-Band)</a>
</td>
<td class="ibnowrap"> mag
</td></tr>
<tr style="display:none;">
<td><a href="G-Band-Magnitude" title="G-Band-Magnitude">G-Band-Magnitude</a>
</td>
<td class="ibnowrap"> mag
</td></tr>
<tr>
<th colspan="2" class="ibheader">Spektrum und Indices
</th></tr>
<tr>
<td><a href="Benennung_ver%C3%A4nderlicher_Sterne" title="Benennung veränderlicher Sterne">Veränderlicher Sterntyp</a>
</td>
<td class="ibnowrap"><a href="AM-Herculis-Stern" title="AM-Herculis-Stern">AM</a>+<a href="Bedeckungsver%C3%A4nderlicher_Stern" title="Bedeckungsveränderlicher Stern">E</a><sup id="cite_ref-VSXEntry_2-1" class="reference"><a href="#cite_note-VSXEntry-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td>B−V-Farbindex
</td>
<td class="ibnowrap">
</td></tr>
<tr style="display:none;">
<td>U−B-<a href="Farbindex" title="Farbindex">Farbindex</a>
</td>
<td class="ibnowrap">
</td></tr>
<tr style="display:none;">
<td>R−I-Index
</td>
<td class="ibnowrap">
</td></tr>
<tr>
<td><a href="Spektralklasse" title="Spektralklasse">Spektralklasse</a>
</td>
<td class="ibnowrap">D / M4.5<sup id="cite_ref-Simbad_1-2" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<th colspan="2" class="ibheader"><a href="Astrometrie" title="Astrometrie">Astrometrie</a>
</th></tr>
<tr style="display:none;">
<td><a href="Radialgeschwindigkeit" title="Radialgeschwindigkeit">Radialgeschwindigkeit</a>
</td>
<td class="ibnowrap"> km/s
</td></tr>
<tr>
<td><a href="Parallaxe" title="Parallaxe">Parallaxe</a>
</td>
<td class="ibnowrap">(11.40 ± 0.02) <a href="Winkelsekunde" title="Winkelsekunde">mas</a><sup id="cite_ref-Simbad_1-3" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td>Entfernung
</td>
<td class="ibnowrap">(286.0 ± 0.5) <a href="Lichtjahr" title="Lichtjahr">Lj</a><br>(88) <a href="Parsec" title="Parsec">pc</a>
</td></tr>
<tr style="display:none;">
<td>Visuelle <a href="Absolute_Helligkeit" title="Absolute Helligkeit">Absolute Helligkeit</a> M<sub>vis</sub>
</td>
<td class="ibnowrap"> mag
</td></tr>
<tr style="display:none;">
<td>Bolometrische <a href="Absolute_Helligkeit" title="Absolute Helligkeit">Absolute Helligkeit</a> M<sub>bol</sub>
</td>
<td class="ibnowrap">{{{Absolut-bol}}} mag
</td></tr>
<tr>
<th colspan="2" class="ibheader"><a href="Eigenbewegung_(Astronomie)" title="Eigenbewegung (Astronomie)">Eigenbewegung</a><sup id="cite_ref-Simbad_1-4" class="reference"><a href="#cite_note-Simbad-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</th></tr>
<tr>
<td>Rek.-Anteil:
</td>
<td class="ibnowrap">(−45.96 ± 0.03) <a href="Winkelsekunde" title="Winkelsekunde">mas</a>/<a href="Jahr" title="Jahr">a</a>
</td></tr>
<tr>
<td>Dekl.-Anteil:
</td>
<td class="ibnowrap">(28.05 ± 0.03) <a href="Winkelsekunde" title="Winkelsekunde">mas</a>/<a href="Jahr" title="Jahr">a</a>
</td></tr>
<tr>
<th colspan="2" class="ibheader">Physikalische Eigenschaften
</th></tr>
<tr>
<td><a href="Masse_(Physik)" title="Masse (Physik)">Masse</a>
</td>
<td class="ibnowrap">0.83 / 0.26 <a href="Sonnenmasse" title="Sonnenmasse"><i>M</i><sub>☉</sub></a><sup id="cite_ref-Harvard_3-0" class="reference"><a href="#cite_note-Harvard-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td><a href="Radius" title="Radius">Radius</a>
</td>
<td class="ibnowrap">0.0091 / 0.314 <a href="Sonnenradius" title="Sonnenradius"><i>R</i><sub>☉</sub></a><sup id="cite_ref-Harvard_3-1" class="reference"><a href="#cite_note-Harvard-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td><a href="Leuchtkraft" title="Leuchtkraft">Leuchtkraft</a>
</td>
<td class="ibnowrap">
<p> <a href="Sonnenleuchtkraft" title="Sonnenleuchtkraft"><i>L</i><sub>☉</sub></a>
</p>
</td></tr>
<tr>
<td><a href="Effektive_Temperatur" title="Effektive Temperatur">Effektive Temperatur</a>
</td>
<td class="ibnowrap">19000 / 3304 <a href="Kelvin" title="Kelvin">K</a><sup id="cite_ref-Harvard_3-2" class="reference"><a href="#cite_note-Harvard-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td><a href="Metallizit%C3%A4t" title="Metallizität">Metallizität</a> [Fe/H]
</td>
<td class="ibnowrap">
</td></tr>
<tr style="display:none;">
<td><a href="Sternrotation" title="Sternrotation">Rotationsdauer</a>
</td>
<td class="ibnowrap">
</td></tr>
<tr style="display:none;">
<td>Alter
</td>
<td class="ibnowrap"> <a href="Jahr" title="Jahr">a</a>
</td></tr>
<tr>
<th colspan="2" class="ibheader">Andere Bezeichnungen und <a href="Liste_astronomischer_Kataloge" title="Liste astronomischer Kataloge">Katalogeinträge</a>
</th></tr>
<tr>
<td colspan="2"><table class="centered" style="width:100%; border:none; font-size:smaller; margin:0 .2em; white-space:nowrap; line-height:1.3em;"><tbody><tr><td style="white-space:nowrap;"><a href="Two_Micron_All_Sky_Survey" title="Two Micron All Sky Survey">2MASS-Katalog</a></td><td style="white-space:nowrap;">2MASS J18161324+4952048<a rel="nofollow" class="external autonumber" href="https://vizier.u-strasbg.fr/viz-bin/VizieR-5?-source=II/246/out&-out.all&&-out.max=10&2MASS=18161324%2B4952048">[1]</a></td></tr><tr><td style="white-space:nowrap; vertical-align:top; padding-top:0.2em;">Weitere Bezeichnungen</td><td style="white-space:normal;">
AM Herculis</td></tr></tbody></table>
</td></tr>
<tr style="display:none;">
<th colspan="2" class="ibheader">Anmerkung
</th></tr>
<tr style="display:none;">
<td colspan="2">{{{Anmerkung}}}
</td></tr></tbody></table>
<p><b>AM Herculis</b> ist ein <a href="Doppelstern" title="Doppelstern">Doppelsternsystem</a> bestehend aus einem <a href="Roter_Zwerg" title="Roter Zwerg">Roten Zwerg</a> und einem <a href="Wei%C3%9Fer_Zwerg" title="Weißer Zwerg">Weißen Zwerg</a> im <a href="Sternbild" title="Sternbild">Sternbild</a> <a href="Herkules_(Sternbild)" title="Herkules (Sternbild)">Herkules</a> mit einer Entfernung von etwa 290 <a href="Lichtjahr" title="Lichtjahr">Lichtjahren</a>. Er bildet zusammen mit <a href="AN_Ursae_Majoris" title="AN Ursae Majoris">AN Ursae Majoris</a> den Prototyp der sogenannten <a href="AM-Herculis-Stern" title="AM-Herculis-Stern">AM-Herculis-Sterne</a>, welche zu den <a href="Kataklysmische_Ver%C3%A4nderliche" class="mw-redirect" title="Kataklysmische Veränderliche">Kataklysmischen Veränderlichen</a> gehören.
Das gesamte System hat etwa eine ähnliche Masse wie die Sonne, wobei der größere Teil von etwa 0.8 Sonnenmassen auf den Weißen Zwerg fällt und der kleinere von knapp 0.3 Sonnenmassen auf den Roten Zwerg.<sup id="cite_ref-Harvard_3-3" class="reference"><a href="#cite_note-Harvard-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Geschichte">Geschichte</h2></div>
<p>AM Herculis wurde 1923 von <a href="Max_Wolf" title="Max Wolf">Max Wolf</a> entdeckt und eingetragen im <a href="General_Catalogue_of_Variable_Stars" title="General Catalogue of Variable Stars">General Catalogue of Variable Stars</a>. Als irregulärer <a href="Ver%C3%A4nderlicher_Stern" title="Veränderlicher Stern">Veränderlicher Stern</a> schwankt seine <a href="Absolute_Helligkeit" title="Absolute Helligkeit">Helligkeit</a> zwischen 12 und 15<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-VSXEntry_2-2" class="reference"><a href="#cite_note-VSXEntry-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. 1976 stellte der Astronom S. Tapia fest, dass das Licht des Stern linear und zirkulär polarisiert ist, was auf ein starkes <a href="Magnetfeld" class="mw-redirect" title="Magnetfeld">Magnetfeld</a> in der Umgebung schließen lässt und offenbarte, dass dieses Sternsystem komplizierter ist als bis dahin angenommen.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>
</p>
<div class="mw-heading mw-heading2"><h2 id="Weblinks">Weblinks</h2></div>
<ul><li><a rel="nofollow" class="external free" href="https://www.aavso.org/vsots_amher">https://www.aavso.org/vsots_amher</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Siehe_auch">Siehe auch</h2></div>
<ul><li><a href="AM-Herculis-Stern" title="AM-Herculis-Stern">AM-Herculis-Stern</a></li>
<li><a href="AN_Ursae_Majoris" title="AN Ursae Majoris">AN Ursae Majoris</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Einzelnachweise">Einzelnachweise</h2></div>
<ol class="references">
<li id="cite_note-Simbad-1"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Simbad_1-0">a</a></sup> <sup><a href="#cite_ref-Simbad_1-1">b</a></sup> <sup><a href="#cite_ref-Simbad_1-2">c</a></sup> <sup><a href="#cite_ref-Simbad_1-3">d</a></sup> <sup><a href="#cite_ref-Simbad_1-4">e</a></sup></span> <span class="reference-text"><span class="cite"><a rel="nofollow" class="external text" href="http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=AM+HER&submit=SIMBAD+search"><i>AM Her.</i></a> In: <i><a href="SIMBAD" title="SIMBAD">SIMBAD</a>.</i> <a href="Centre_de_Donn%C3%A9es_astronomiques_de_Strasbourg" title="Centre de Données astronomiques de Strasbourg">Centre de Données astronomiques de Strasbourg</a>,<span class="Abrufdatum"> abgerufen am 14. September 2018</span>.</span><span style="display: none;" class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2Fde.wikipedia.org%3AAM+Herculis&rft.title=AM+Her&rft.description=AM+Her&rft.identifier=http%3A%2F%2Fsimbad.u-strasbg.fr%2Fsimbad%2Fsim-basic%3FIdent%3DAM%2BHER%26submit%3DSIMBAD%2Bsearch&rft.publisher=%5B%5BCentre+de+Donn%C3%A9es+astronomiques+de+Strasbourg%5D%5D"> </span></span>
</li>
<li id="cite_note-VSXEntry-2"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-VSXEntry_2-0">a</a></sup> <sup><a href="#cite_ref-VSXEntry_2-1">b</a></sup> <sup><a href="#cite_ref-VSXEntry_2-2">c</a></sup></span> <span class="reference-text"><span class="cite"><a rel="nofollow" class="external text" href="https://www.aavso.org/vsx/index.php?view=detail.top&oid=14877"><i>AM Her.</i></a> In: <i>VSX.</i> AAVSO,<span class="Abrufdatum"> abgerufen am 14. September 2018</span>.</span><span style="display: none;" class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2Fde.wikipedia.org%3AAM+Herculis&rft.title=AM+Her&rft.description=AM+Her&rft.identifier=https%3A%2F%2Fwww.aavso.org%2Fvsx%2Findex.php%3Fview%3Ddetail.top%26oid%3D14877&rft.publisher=AAVSO"> </span></span>
</li>
<li id="cite_note-Harvard-3"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Harvard_3-0">a</a></sup> <sup><a href="#cite_ref-Harvard_3-1">b</a></sup> <sup><a href="#cite_ref-Harvard_3-2">c</a></sup> <sup><a href="#cite_ref-Harvard_3-3">d</a></sup></span> <span class="reference-text">Goetz, W.: <cite class="lang" lang="en" dir="auto" style="font-style:italic">The binary system AM Herculis and the parameters of its components</cite>. In: <cite class="lang" lang="en" dir="auto" style="font-style:italic"><a href="Astronomische_Nachrichten" title="Astronomische Nachrichten">Astronomische Nachrichten</a></cite>. 312. Jahrgang, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>2</span>, 1991, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>103–105</span>, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1991AN....312..103G">1991AN....312..103G</a> (englisch).<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:AM+Herculis&rft.atitle=The+binary+system+AM+Herculis+and+the+parameters+of+its+components&rft.au=Goetz%2C+W.&rft.date=1991&rft.genre=journal&rft.issue=2&rft.jtitle=Astronomische+Nachrichten&rft.pages=103-105&rft.volume=312.+Jahrgang" style="display:none"> </span></span>
</li>
<li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text">S. Seliwanow: <cite style="font-style:italic">Mitteilungen über Veränderliche - Veränderlicher 28.1923 Herculis - M. Wolf - December 1923</cite>. In: <cite style="font-style:italic"><a href="Astronomische_Nachrichten" title="Astronomische Nachrichten">Astronomische Nachrichten</a></cite>. 220. Jahrgang, <span style="white-space:nowrap">Nr.<span style="display:inline-block;width:.2em"> </span>15</span>, 1923, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>255</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1002/asna.19232201505">10.1002/asna.19232201505</a></span>, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1924AN....220..249H">1924AN....220..249H</a>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rfr_id=info:sid/de.wikipedia.org:AM+Herculis&rft.atitle=Mitteilungen+%C3%BCber+Ver%C3%A4nderliche+-+Ver%C3%A4nderlicher+28.1923+Herculis+-+M.+Wolf+-+December+1923&rft.au=S.+Seliwanow&rft.date=1923&rft.doi=10.1002%2Fasna.19232201505&rft.genre=journal&rft.issue=15&rft.jtitle=Astronomische+Nachrichten&rft.pages=255&rft.volume=220.+Jahrgang" style="display:none"> </span></span>
</li>
<li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text">Tapia, S.: <cite style="font-style:italic">Discovery of a magnetic compact star in the AM Herculis/3U 1809+50 system</cite>. In: <cite style="font-style:italic"><a href="The_Astrophysical_Journal" title="The Astrophysical Journal">The Astrophysical Journal</a> Letters</cite>. 212. Jahrgang, 15. März 1977, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>L125–L129</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1086/182390">10.1086/182390</a></span>, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1977ApJ...212L.125T">1977ApJ...212L.125T</a>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:AM+Herculis&rft.atitle=Discovery+of+a+magnetic+compact+star+in+the+AM+Herculis%2F3U+1809%2B50+system&rft.au=Tapia%2C+S.&rft.btitle=The+Astrophysical+Journal+Letters&rft.date=1977-03-15&rft.doi=10.1086%2F182390&rft.genre=book&rft.pages=L125-L129&rft.volume=212.+Jahrgang" style="display:none"> </span></span>
</li>
<li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text">Hessman, F.V.,Gansicke, B.T.,Mattei, J.A.: <cite style="font-style:italic">The history and source of mass-transfer variations in AM Herculis</cite>. In: <cite style="font-style:italic"><a href="Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></cite>. 361. Jahrgang, September 2000, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>952–958</span>, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2000A&A...361..952H">2000A&A...361..952H</a>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:AM+Herculis&rft.atitle=The+history+and+source+of+mass-transfer+variations+in+AM+Herculis&rft.au=Hessman%2C+F.V.%2CGansicke%2C+...&rft.btitle=Astronomy+%26+Astrophysics&rft.date=2000-09&rft.genre=book&rft.pages=952-958&rft.volume=361.+Jahrgang" style="display:none"> </span></span>
</li>
<li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text">Krzeminski, W.,Serkowski, K.: <cite style="font-style:italic">Extremely high circular polarization of AN Ursae Majoris</cite>. In: <cite style="font-style:italic"><a href="The_Astrophysical_Journal" title="The Astrophysical Journal">The Astrophysical Journal</a> Letters</cite>. 216. Jahrgang, August 1977, <span style="white-space:nowrap">S.<span style="display:inline-block;width:.2em"> </span>L45</span>, <a href="Digital_Object_Identifier" title="Digital Object Identifier">doi</a>:<span class="uri-handle" style="white-space:nowrap"><a rel="nofollow" class="external text" href="https://doi.org/10.1086/182506">10.1086/182506</a></span>, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1977ApJ...216L..45K">1977ApJ...216L..45K</a>.<span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rfr_id=info:sid/de.wikipedia.org:AM+Herculis&rft.atitle=Extremely+high+circular+polarization+of+AN+Ursae+Majoris&rft.au=Krzeminski%2C+W.%2CSerkowski%2C+...&rft.btitle=The+Astrophysical+Journal+Letters&rft.date=1977-08&rft.doi=10.1086%2F182506&rft.genre=book&rft.pages=L45&rft.volume=216.+Jahrgang" style="display:none"> </span></span>
</li>
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