स्वाति तारा का स्रोत देखें

{{Starbox begin
 | name=स्वाति तारा<br><small>Arcturus</small>
}}
{{Starbox image
| image = 
     <div style="position: relative">[[File:Arcturus-star.jpg|250px|alt=Diagram showing star positions and boundaries of the Boötes constellation and its surroundings]]
     <div style="position: absolute; left: 53.6%; top: 59.6%">[[File:Cercle rouge 100%.svg|12px]]</div>
     </div>
| caption=सूरज की तुलना में स्वाति का व्यास लगभग 25 गुना है
}}
{{Starbox observe
 | epoch       =J2000
 | constell    =[[ग्वाला तारामंडल]]
 | ra          ={{RA|14|15|39.7}}<ref name="vanLeeuwen2007"/>
 | dec         ={{DEC|+19|10|56}}<ref name="vanLeeuwen2007"/>
 | appmag_v    =&minus;0.05<ref name=ducati/>
}}
{{Starbox character
 | class             = K0 III<ref name=gray>{{cite journal|bibcode=2003AJ....126.2048G|title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I|url=https://archive.org/details/sim_astronomical-journal_2003-10_126_4/page/2048|journal=The Astronomical Journal|volume=126|issue=4|pages=2048|author1=Gray|first1=R. O.|last2=Corbally|first2=C. J.|last3=Garrison|first3=R. F.|last4=McFadden|first4=M. T.|last5=Robinson|first5=P. E.|date=2003|doi=10.1086/378365|arxiv = astro-ph/0308182 }}</ref>
 | appmag_1_passband = [[:en:J band (infrared)|J]]
 | appmag_1          = &minus;2.25<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|author1=Ducati|first1=J. R.|date=2002}}</ref>
 | b-v               = +1.23<ref name=ducati/>
 | u-b               = +1.28<ref name=ducati/>
 | r-i               = +0.65<ref name=ducati/>
 | v-r               =
 | variable          =
}}
|- bgcolor="#FFFAFA"
| Note (category: variability): || H and K emission vary.
{{Starbox astrometry
 | radial_v          =−5.19<ref>{{cite journal|bibcode=2008AJ....135..209M|title=Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity|url=https://archive.org/details/sim_astronomical-journal_2008-01_135_1/page/209|journal=The Astronomical Journal|volume=135|pages=209–231|author1=Massarotti|first1=Alessandro|last2=Latham|first2=David W.|last3=Stefanik|first3=Robert P.|last4=Fogel|first4=Jeffrey|date=2008|doi=10.1088/0004-6256/135/1/209}}</ref>
 | prop_mo_ra        ={{val|-1093.45}}<ref name="Perryman1997">{{cite web|url=http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=I/239/tyc_main&HIP=69673|title=HIP 69673|work=The Hipparcos and Tycho Catalogues|author=Perryman|date=1997|display-authors=etal}}</ref>
 | prop_mo_dec       ={{val|-1999.40}}<ref name="Perryman1997" />
 | parallax          =88.83
 | p_error           =0.54
 | parallax_footnote =<ref name="vanLeeuwen2007" />
 | absmag_v          ={{val|-0.30|0.02}}<ref name=aj135_3_892/>
}}
{{Starbox detail
 | mass                ={{val|1.08|0.06}}<ref name=ramirez_prieto_2011/>
 | metal_fe            ={{val|-0.52|0.04}}<ref name=ramirez_prieto_2011/>
 | radius              ={{val|25.4|0.2}}<ref name=ramirez_prieto_2011/>
 | rotational_velocity ={{val|2.4|1.0}}<ref name=aj135_3_892/>
 | luminosity          =170<ref name=aaa465_2_593/>
 | temperature         ={{val|4286|30}}<ref name=ramirez_prieto_2011/>
 | gravity             ={{val|1.66|0.05}}<ref name=ramirez_prieto_2011/>
 | age_gyr             ={{val|7.1|+1.5|-1.2}}<ref name=ramirez_prieto_2011/>
}}
{{Starbox catalog
 | names={{odlist | name=Alramech | name2=Alramech | name3=Abramech | B=α&nbsp;Boötis | F=16 Boötes | BD=+19° 2777 | GJ=541 | HD=124897 | HIP=69673 | HR=5340 | SAO=100944 | GCTP=3242.00 | LHS=48 }}, [[General Catalogue of Trigonometric Parallaxes|GCTP]]&nbsp;3242.00
}}
{{Starbox reference
 | Simbad=HD+124897
 | ARICNS =
}}
{{starbox sources|HIP|CCDM|HR|[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205340 VizieR catalog entry]}}
{{Starbox end}}
'''स्वाति''' या '''आर्कट्युरस''' (Arcturus) [[ग्वाला तारामंडल]] में स्थित एक नारंगी रंग का [[दानव तारा]] है। इसका [[बायर नाम]] "अल्फ़ा बोओटीस" (α Boötis) है। यह आकाश का [[सबसे रोशन तारों की सूची|तीसरा सब से चमकीला तारा]] है। इसका [[सापेक्ष कान्तिमान]] (चमक) -0.04 [[खगोलीय मैग्निट्यूड|मैग्निट्यूड]] है। स्वाति[[पृथ्वी]] से 36.7 [[प्रकाश-वर्ष]] की दूरी पर है और हमारे [[सूरज]] से 25.7 गुना व्यास (डायामीटर) रखता है। इसका सतही तापमान 4,300 [[कैल्विन]] अनुमानित किया जाता है। स्वाति के अध्ययन से यह शंका पैदा हो गयी है के इसका [[द्वितारा]] होने की सम्भावना है जिसमें इसका साथी तारा इस से 20 गुना कम चमक वाला है, लेकिन यह अभी पूरी तरह प्रमाणित नहीं हुआ है।<ref name="vanLeeuwen2007">{{cite journal | first=F. | last=van Leeuwen | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–64 | date=November 2007 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752}}</ref><ref name=aj135_3_892>{{Cite journal| display-authors=1 | last1=Carney | first1=Bruce W. | last2=Gray | first2=David F. | last3=Yong | first3=David | last4=Latham | first4=David W. | last5=Manset | first5=Nadine | last6=Zelman | first6=Rachel | last7=Laird | first7=John B. | title=Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars | url=https://archive.org/details/sim_astronomical-journal_2008-03_135_3/page/892 | journal=The Astronomical Journal | volume=135 | issue=3 | pages=892–906 |date=March 2008 | doi=10.1088/0004-6256/135/3/892 | bibcode=2008AJ....135..892C |arxiv = 0711.4984}}</ref><ref name=aaa465_2_593>{{Cite journal| last1=Schröder | first1=K.-P. | last2=Cuntz | first2=M. | title=A critical test of empirical mass loss formulas applied to individual giants and supergiants | journal=Astronomy and Astrophysics | volume=465 | issue=2 | pages=593–601 |date=April 2007 | doi=10.1051/0004-6361:20066633 | bibcode=2007A&A...465..593S |arxiv = astro-ph/0702172}}</ref><ref name=ramirez_prieto_2011>{{Cite journal|bibcode=2011ApJ...743..135R|title=Fundamental Parameters and Chemical Composition of Arcturus|journal=The Astrophysical Journal|volume=743|issue=2|pages=135|date=December 2011 |author=I. Ramírez|author2=C. Allende Prieto|doi=10.1088/0004-637X/743/2/135|arxiv = 1109.4425 }}</ref>

== इन्हें भी देखें ==
* [[ग्वाला तारामंडल]]
* [[लाल दानव तारा]]
* [[दानव तारा]]
* [[सबसे रोशन तारों की सूची]]

== सन्दर्भ ==
{{टिप्पणीसूची}}

[[श्रेणी:तारे]]
[[श्रेणी:दानव तारे]]
[[श्रेणी:हिन्दी विकि डीवीडी परियोजना]]
[[श्रेणी:ग्वाला तारामंडल]]
[[श्रेणी:के-प्रकार दानव तारे]]