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</style><div id="coordinates" class="coordinates"><a class="external text" href="https://geohack.toolforge.org/skyhack.php?ra=4.5819444444444&amp;de=24.481388888889&amp;size=0.016666666666667&amp;name=AA+Tauri&amp;object=AA%20Tauri&amp;_globe:=">Datenbanklinks zu AA Tauri</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="Stern" title="Stern">Stern</a><br> AA Tauri
</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: 169px; top: 83px; 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=04%2034%2055%20%2B24%2028%2053&amp;fov=0.016666666666667&amp;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>:&nbsp;<a href="Epoche_(Astronomie)#Standardepochen" title="Epoche (Astronomie)">J2000.0</a>, <a href="Epoche_(Astronomie)" title="Epoche (Astronomie)">Epoche</a>:&nbsp;J2000.0</small>
</th></tr>
<tr>
<td><a href="Sternbild" title="Sternbild">Sternbild</a>
</td>
<td class="ibnowrap"><a href="Stier_(Sternbild)" title="Stier (Sternbild)">Stier</a>
</td></tr>
<tr>
<td><a href="Rektaszension" title="Rektaszension">Rektaszension</a>
</td>
<td class="ibnowrap">04h&nbsp;34m&nbsp;55s <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">+24°&nbsp;28′&nbsp;53″ <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}}}&nbsp;<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">12,5 mag bis 16,1 mag; Mittel 12,58&nbsp;mag<sup id="cite_ref-Herbig_2-0" class="reference"><a href="#cite_note-Herbig-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}}}&nbsp;mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System" title="UBV-System">Helligkeit (B-Band)</a>
</td>
<td class="ibnowrap">{{{magB}}}&nbsp;mag
</td></tr>
<tr style="display:none;">
<td><a href="UBV-System" title="UBV-System">Helligkeit (V-Band)</a>
</td>
<td class="ibnowrap">{{{magV}}}&nbsp;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}}}&nbsp;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}}}&nbsp;mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (J-Band)</a>
</td>
<td class="ibnowrap">{{{magJ}}}&nbsp;mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (H-Band)</a>
</td>
<td class="ibnowrap">{{{magH}}}&nbsp;mag
</td></tr>
<tr style="display:none;">
<td><a href="Frequenzband#Astronomie" title="Frequenzband">Helligkeit (K-Band)</a>
</td>
<td class="ibnowrap">&nbsp;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">&nbsp;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">klassischer <a href="T-Tauri-Stern" title="T-Tauri-Stern">T-Tauri-Variabler</a><sup id="cite_ref-Bouvier_3-0" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td>B−V-Farbindex
</td>
<td class="ibnowrap">+1,17<sup id="cite_ref-Herbig_2-1" class="reference"><a href="#cite_note-Herbig-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td>U−B-<a href="Farbindex" title="Farbindex">Farbindex</a>
</td>
<td class="ibnowrap">+0,07<sup id="cite_ref-Herbig_2-2" class="reference"><a href="#cite_note-Herbig-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td>R−I-Index
</td>
<td class="ibnowrap">{{{R-I-Index}}}
</td></tr>
<tr>
<td><a href="Spektralklasse" title="Spektralklasse">Spektralklasse</a>
</td>
<td class="ibnowrap">K7 V<sup id="cite_ref-Bouvier_3-1" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<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>
<td><a href="Radialgeschwindigkeit" title="Radialgeschwindigkeit">Radialgeschwindigkeit</a>
</td>
<td class="ibnowrap">16,1 ± 2,1&nbsp;km/s<sup id="cite_ref-Hartmann_4-0" class="reference"><a href="#cite_note-Hartmann-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr style="display:none;">
<td><a href="Parallaxe" title="Parallaxe">Parallaxe</a>
</td>
<td class="ibnowrap">{{{Parallaxe}}}&nbsp;<a href="Winkelsekunde" title="Winkelsekunde">mas</a>
</td></tr>
<tr>
<td>Entfernung
</td>
<td class="ibnowrap">ca. 450&nbsp;<a href="Lichtjahr" title="Lichtjahr">Lj</a><br>ca. 140&nbsp;<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">&nbsp;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}}}&nbsp;mag
</td></tr>
<tr>
<th colspan="2" class="ibheader"><a href="Eigenbewegung_(Astronomie)" title="Eigenbewegung (Astronomie)">Eigenbewegung</a><sup id="cite_ref-Jones_5-0" class="reference"><a href="#cite_note-Jones-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>
</th></tr>
<tr>
<td>Rek.-Anteil:
</td>
<td class="ibnowrap">+14&nbsp;<a href="Winkelsekunde" title="Winkelsekunde">mas</a>/<a href="Jahr" title="Jahr">a</a>
</td></tr>
<tr>
<td>Dekl.-Anteil:
</td>
<td class="ibnowrap">−24&nbsp;<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">ca. 0,8&nbsp;<a href="Sonnenmasse" title="Sonnenmasse"><i>M</i><sub>☉</sub></a><sup id="cite_ref-Bouvier_3-2" class="reference"><a href="#cite_note-Bouvier-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">(1,85 ± 0,15)&nbsp;<a href="Sonnenradius" title="Sonnenradius"><i>R</i><sub>☉</sub></a><sup id="cite_ref-Bouvier_3-3" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td><a href="Leuchtkraft" title="Leuchtkraft">Leuchtkraft</a>
</td>
<td class="ibnowrap">
<p>(0,8 ± 0,1)&nbsp;<a href="Sonnenleuchtkraft" title="Sonnenleuchtkraft"><i>L</i><sub>☉</sub></a><sup id="cite_ref-Bouvier_3-4" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</p>
</td></tr>
<tr>
<td><a href="Effektive_Temperatur" title="Effektive Temperatur">Effektive Temperatur</a>
</td>
<td class="ibnowrap">(4030 ± 30)&nbsp;<a href="Kelvin" title="Kelvin">K</a><sup id="cite_ref-Bouvier_3-5" class="reference"><a href="#cite_note-Bouvier-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>
<td><a href="Sternrotation" title="Sternrotation">Rotationsdauer</a>
</td>
<td class="ibnowrap">8,5 <a href="Tag" title="Tag">d</a><sup id="cite_ref-Bouvier_3-6" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</td></tr>
<tr>
<td>Alter
</td>
<td class="ibnowrap">ca. 2 Millionen&nbsp;<a href="Jahr" title="Jahr">a</a><sup id="cite_ref-Bouvier_3-7" class="reference"><a href="#cite_note-Bouvier-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
</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; vertical-align:top; padding-top:0.2em;">Weitere Bezeichnungen</td><td style="white-space:normal;">
AA Tauri&nbsp;• IRAS&nbsp;04318+2422</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>AA Tauri</b> ist ein Fix<a href="Stern" title="Stern">stern</a> im Sternbild <a href="Stier_(Sternbild)" title="Stier (Sternbild)">Stier</a>. Seine Besonderheit ist, dass in seiner Umgebung – entsprechend der Entdeckung von J. Carr (laut der Zeitschrift <i>Science,</i> Bd. 319, S. 1504) – mit Hilfe des Spitzer-<a href="Infrarot" class="mw-redirect" title="Infrarot">Infrarot</a>-<a href="Teleskop" title="Teleskop">Teleskops</a> <a href="Cyanwasserstoff" title="Cyanwasserstoff">Cyanwasserstoff</a> (Blausäure), <a href="Acetylen" class="mw-redirect" title="Acetylen">Acetylen</a> und <a href="Kohlendioxid" class="mw-redirect" title="Kohlendioxid">Kohlendioxid</a> sowie <a href="Wasser" title="Wasser">Wasserdampf</a> nachgewiesen werden konnten. Der Stern besitzt somit eine <a href="Protoplanetare_Scheibe" title="Protoplanetare Scheibe">protoplanetare Scheibe</a> aus organischem Material, in der aus der organischen Chemie bekannte, für die <a href="Kosmochemie" title="Kosmochemie">Kosmochemie</a> hochinteressante Prozesse einer chemischen Evolution stattfinden (vgl. unter <a href="Chemische_Evolution" title="Chemische Evolution">chemische Evolution</a>).
AA Tauri befindet sich im Taurus-Auriga-Komplex und ist Teil der T-Assoziation Taurus T3 und ist darin mit der Dunkelwolke Barnard 18 verbunden, wobei der Stern aber außerhalb des dichten inneren Teils der Wolke liegt.
</p>
<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"><a href="#cite_ref-SIMBAD_1-0">↑</a></span> <span class="reference-text"><span class="cite">Centre de Données astronomiques de Strasbourg: <a rel="nofollow" class="external text" href="http://simbad.u-strasbg.fr/simbad/sim-id?Ident=AA+Tauri"><i>SIMBAD-Abfrage für AA Tauri.</i></a> In: <i>SIMBAD.</i><span class="Abrufdatum"> Abgerufen am 2.&nbsp;Juni 2008</span> (englisch).</span><span style="display: none;" class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&amp;rfr_id=info%3Asid%2Fde.wikipedia.org%3AAA+Tauri&amp;rft.title=SIMBAD-Abfrage+f%C3%BCr+AA+Tauri&amp;rft.description=SIMBAD-Abfrage+f%C3%BCr+AA+Tauri&amp;rft.identifier=http%3A%2F%2Fsimbad.u-strasbg.fr%2Fsimbad%2Fsim-id%3FIdent%3DAA%2BTauri&amp;rft.creator=Centre+de+Donn%C3%A9es+astronomiques+de+Strasbourg&amp;rft.date=&amp;rft.language=Englisch">&nbsp;</span></span>
</li>
<li id="cite_note-Herbig-2"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Herbig_2-0">a</a></sup> <sup><a href="#cite_ref-Herbig_2-1">b</a></sup> <sup><a href="#cite_ref-Herbig_2-2">c</a></sup></span> <span class="reference-text"> Herbig, G. H.; Kameswara Rao, N.: <i>Second Catalog of Emission-Line Stars of the Orion Population</i>; in: Astrophysical Journal, Vol. 174, S. 401, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1972ApJ...174..401H">1972ApJ...174..401H</a> (englisch)</span>
</li>
<li id="cite_note-Bouvier-3"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-Bouvier_3-0">a</a></sup> <sup><a href="#cite_ref-Bouvier_3-1">b</a></sup> <sup><a href="#cite_ref-Bouvier_3-2">c</a></sup> <sup><a href="#cite_ref-Bouvier_3-3">d</a></sup> <sup><a href="#cite_ref-Bouvier_3-4">e</a></sup> <sup><a href="#cite_ref-Bouvier_3-5">f</a></sup> <sup><a href="#cite_ref-Bouvier_3-6">g</a></sup> <sup><a href="#cite_ref-Bouvier_3-7">h</a></sup></span> <span class="reference-text">Bouvier et al.: <i>Magnetospheric accretion onto the T Tauri star AA Tauri</i>; in: Astronomy and Astrophysics, Vol. 349, S. 619ff. <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1999A&amp;A...349..619B">1999A&amp;A...349..619B</a> (englisch)</span>
</li>
<li id="cite_note-Hartmann-4"><span class="mw-cite-backlink"><a href="#cite_ref-Hartmann_4-0">↑</a></span> <span class="reference-text">Hartmann, L.; Hewett, R.; Stahler, S.; Mathieu, R. D.: <i>Rotational and radial velocities of T Tauri stars</i>; in: Astrophysical Journal, Vol. 309, S. 275–293, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1986ApJ...309..275H">1986ApJ...309..275H</a> (englisch)</span>
</li>
<li id="cite_note-Jones-5"><span class="mw-cite-backlink"><a href="#cite_ref-Jones_5-0">↑</a></span> <span class="reference-text">Jones, B. F.; Herbig, G. H.: <i>Proper motions of T Tauri variables and other stars associated with the Taurus-Auriga dark clouds</i>; in: Astronomical Journal, Vol. 84, S. 1872–1889, <a href="Bibcode" title="Bibcode">bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1979AJ.....84.1872J">1979AJ.....84.1872J</a> (englisch)</span>
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