View source for 41 Arietis

{{Short description|Binary star in the constellation Aries}}
{{Starbox begin
 | name=41 Arietis
}}
{{Starbox image
 | image=
{{Location mark
|image=Aries constellation map.svg|alt=|float=center|width=240
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=41 Ari
|x=484|y=244
}}
|caption=Location of 41 Arietis (circled)
}}
{{Starbox observe
 | epoch       = J2000
 | ra          = {{RA|02|49|59.03324}}<ref name=aaa474_2_653/>
 | dec         = {{DEC|+27|15|37.8260}}<ref name=aaa474_2_653/>
 | appmag_v    = 3.63<ref name=clpl4_99/>
 | constell    = [[Aries (constellation)|Aries]]
}}
{{Starbox character
 | class       = B8&nbsp;Vn<ref name=aj77_750/>
 | r-i         = 
 | v-r         = 
 | b-v         = –0.10<ref name=clpl4_99/>
 | u-b         = –0.38<ref name=clpl4_99/>
 | variable    = 
}}
{{Starbox astrometry
 | radial_v    = +4<ref name=gcsrv/>
 | prop_mo_ra  = +66.81<ref name=aaa474_2_653/>
 | prop_mo_dec = –116.52<ref name=aaa474_2_653/>
 | parallax    = 19.69
 | p_error     = 0.19
 | parallax_footnote = <ref name=aaa474_2_653/>
 | absmag_v    = 
}}
{{Starbox detail
 | mass        = {{val|3.1|0.1}}<ref name=apj736_2_89/>
 | radius      = 
 | luminosity  = 160<ref name=aj143_6_134/>
 | temperature = {{val|11900}}<ref name=aj143_6_134/>
 | metal_fe    = 
 | rotational_velocity = 175<ref name=apj573_1_359/>
 | age_myr     = {{val|130|+10|-30}}<ref name=apj736_2_89/>
}}
{{Starbox catalog
 | names = Bharani, c&nbsp;Arietis, [[Star catalogue#ADS|ADS]]&nbsp;2159, [[Bonner Durchmusterung|BD]]+26&nbsp;471, [[Fifth Fundamental Catalogue|FK5]]&nbsp;100, [[Henry Draper Catalogue|HD]]&nbsp;17573, [[Hipparcos catalogue|HIP]]&nbsp;13209, [[Harvard Revised catalogue|HR]]&nbsp;838, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;75596, [[Washington Double Star Catalog|WDS]] 02500+2716.<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad=41+Ari
}}
{{Starbox end}}

'''41 Arietis''' (abbreviated '''41 Ari''') is a [[triple star system]] in the northern [[constellation]] of [[Aries (constellation)|Aries]]. With an [[apparent visual magnitude]] of 3.63,<ref name=clpl4_99/> this system is readily visible to the naked eye. It has an annual [[stellar parallax|parallax]] shift of 19.69&nbsp;[[milliarcsecond|mas]],<ref name=aaa474_2_653/> which indicates it is at a distance of {{Convert|166|ly|pc|abbr=off|lk=on}} from the [[Sun]].

The system consists of a [[binary star|binary pair]],<ref name=mnras389_2_869/> designated 41 Arietis A, together with a third companion star, 41 Arietis D. (41 Arietis B and C form [[double star|optical pairs]] with A, but are not physically related.<ref name="WDS">{{cite web | url=http://ad.usno.navy.mil/wds/ | title=Washington Double Star Catalog | publisher=United States Naval Observatory | access-date=2 January 2018 | archive-url=https://web.archive.org/web/20110214155533/http://ad.usno.navy.mil/wds/ | archive-date=2011-02-14 | url-status=dead }}</ref>) The components of A are themselves designated 41 Arietis Aa (formally named '''Bharani''' {{IPAc-en|ˈ|b|ær|ə|n|i}}<!--per 'baronet' etc. in the OED-->)<ref name="IAU-LSN">{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |access-date=16 December 2017}}</ref> and Ab.

== Nomenclature ==

''41 Arietis'' is the system's [[Flamsteed designation]]. It does not possess a Greek-letter [[Bayer designation]], since this system was once part of the now-obsolete constellation [[Musca Borealis]], but is sometimes designated ''c Arietis''. The designations of the two constituents as ''41 Arietis A'' and ''D'', and those of ''A's'' components - ''41 Arietis Aa'' and ''Ab'' - derive from the convention used by the Washington Multiplicity Catalog (WMC) for [[Star system|multiple star system]]s, and adopted by the [[International Astronomical Union]] (IAU).<ref name="planetnaming">{{cite arXiv |title=On the naming convention used for multiple star systems and extrasolar planets |date=2010 |eprint=1012.0707 |class=astro-ph.SR |last1= Hessman |first1=F. V. |last2= Dhillon |first2=V. S. |last3= Winget |first3=D. E. |last4= Schreiber |first4=M. R. |last5= Horne |first5=K. |last6= Marsh |first6=T. R. |last7= Guenther |first7=E. |last8= Schwope |first8=A. |last9= Heber |first9=U. }}</ref>

[[Nicolas-Louis de Lacaille]] called the star ''Līliī Austrīnā'' ({{IPAc-en|ɔː|ˈ|s|t|r|aɪ|n|ə}}) 'southern of Lilium' (in Latin) in 1757,<ref>{{cite book |first=Nicolas-Louis |last=de Lacaille |title=Astronomiae fundamenta novissimis solis et stellarum observationibus stabilita, Lutetiae in Collegio mazarineo et in Africa ad caput Bonae Spei peractis a Nicolao Ludovico de La Caille |url=https://books.google.com/books?id=LXm0RAf6fk0C |publisher=J.-J.-St. Collombat |date=1757 |pages=227, 233}}</ref><ref>{{cite book |first=Francis |last=Bailey |title=La Caille's Catalogue of 398 principal Stars, Memoirs of the Royal Astronomical Society, Vol 5 |url=https://books.google.com/books?id=1l9dAAAAcAAJ |publisher=Priestley and Weale |date=1833 |pages=110, 121}}</ref> as a star of the now-defunct constellation of [[Lilium (constellation)|Lilium]] (the [[fleur-de-lis|Lily]]). To him [[39 Arietis]]  was ''Līliī Boreā'', 'northern of Lilium'.

In [[Indian astronomy|Hindu astronomy]], [[Bharani]] (भरणी ''bharaṇī'', {{IPA|sa|ˈbʱɐɽɐɳiː}}) is the second [[nakshatra]], or [[lunar mansion]] corresponding to [[35 Arietis|35]], [[39 Arietis|39]] and 41 Arietis. In 2016, the IAU organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN">{{cite web | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN)|access-date=22 May 2016}}</ref> to catalog and standardize proper names for stars. The WGSN decided to attribute proper names to individual stars rather than entire [[multiple star|multiple systems]].<ref name="TriRpt18">{{cite web | url=https://www.iau.org/static/science/scientific_bodies/working_groups/280/wg-starnames-triennial-report-2015-2018.pdf | page=5 | title=WG Triennial Report (2015-2018) - Star Names |access-date=2018-07-14}}</ref> It approved the name ''Bharani'' for the component 41&nbsp;Arietis Aa on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.<ref name="IAU-LSN"/>

In [[Chinese astronomy|Chinese]], {{lang|zh|胃宿}} ({{lang|zh-Latn|Wèi Su}}), meaning ''[[Stomach (Chinese constellation)|Stomach]] (asterism)'', refers to an [[asterism (astronomy)|asterism]] consisting of 41, 35 and 39 Arietis.<ref>{{in lang|zh}} ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, {{ISBN|978-986-7332-25-7}}.</ref> Consequently, the [[Chinese star names|Chinese name]] for 41 Arietis itself is {{lang|zh|胃宿三}} ({{lang|zh-Latn|Wèi Su sān}}, {{langx|en|the Third Star of Stomach}}.)<ref>{{in lang|zh}} [[:zh-tw:白羊座|白羊座]]</ref>

In [[Avesta|Avestan]], the star was known as Upa-paoiri, and it was associated with one of the [[yazata]]s.<ref>[http://www.avesta.org/angels.html ANGELS:Zoroastrian]</ref>

== Properties ==

The primary component is a [[B-type main sequence star]] with a [[stellar classification]] of B8&nbsp;Vn.<ref name=aj77_750/> The suffix 'n' indicates 'nebulous' [[absorption line]]s in the star's [[stellar spectrum|spectrum]] caused by the [[Doppler effect]] of rapid rotation. It has a [[projected rotational velocity]] of 175&nbsp;km/s.<ref name=apj573_1_359/> This is creating an equatorial bulge that is 12% larger than the star's polar radius.<ref name=aar20_1_51/> It is a candidate member of the [[AB Doradus moving group]]<ref name=aj143_6_134/> and has an orbiting companion at an [[angular separation]] of 0.3&nbsp;[[arcsecond]]s.<ref name=mnras389_2_869/>

==References==
{{reflist|refs=

<ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | postscript=. |arxiv = 0708.1752 | s2cid=18759600 }}</ref>

<ref name=clpl4_99>{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>

<ref name=apj736_2_89>{{citation | display-authors=1 | last1=Janson | first1=Markus | last2=Bonavita | first2=Mariangela | last3=Klahr | first3=Hubert | last4=Lafrenière | first4=David | last5=Jayawardhana | first5=Ray | last6=Zinnecker | first6=Hans | title=High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood | journal=The Astrophysical Journal | volume=736 | issue=2 | page=89   | doi=10.1088/0004-637X/736/2/89 | bibcode=2011ApJ...736...89J | arxiv=1105.2577 | postscript=.  |date=August 2011| s2cid=119217803 }}</ref>

<ref name=aj77_750>{{citation | last1=Cowley | first1=A. | title=Spectral classification of the bright B8 stars | journal=Astronomical Journal | volume=77 | pages=750–755   | doi=10.1086/111348 | bibcode=1972AJ.....77..750C | postscript=.  |date=November 1972}}</ref>

<ref name=gcsrv>{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=[[Carnegie Institution of Washington]] | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}</ref>

<ref name=apj573_1_359>{{citation | last1=Abt | first1=Helmut A. | last2=Levato | first2=Hugo | last3=Grosso | first3=Monica | title=Rotational Velocities of B Stars | journal=The Astrophysical Journal | volume=573 | issue=1 | pages=359–365   | doi=10.1086/340590 | bibcode=2002ApJ...573..359A | postscript=.  |date=July 2002| doi-access=free }}</ref>

<ref name=aj143_6_134>{{citation | last1=McCarthy | first1=Kyle | last2=White | first2=Russel J. | title=The Sizes of the Nearest Young Stars | journal=The Astronomical Journal | volume=143 | issue=6 | page=134   | doi=10.1088/0004-6256/143/6/134 | bibcode=2012AJ....143..134M | arxiv=1201.6600 | postscript=.  |date=June 2012| s2cid=118538522 }}</ref>

<ref name=aar20_1_51>{{citation | last1=van Belle | first1=Gerard T. | title=Interferometric observations of rapidly rotating stars | journal=The Astronomy and Astrophysics Review | volume=20 | issue=1 | page=51   | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | postscript=.  |date=March 2012| s2cid=119273474 }}</ref>

<ref name=mnras389_2_869>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=389 | issue=2 | pages=869–879   | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E |arxiv=0806.2878 | postscript=.  |date=September 2008| doi-access=free | s2cid=14878976 }}</ref>

<ref name=SIMBAD>{{cite simbad | title=41 Ari | access-date=2012-06-24 }}</ref>

}}

==External links==
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20838 HR 838]
* [http://aladin.u-strasbg.fr/AladinPreview?-c=02+49+59.0323%2B27+15+37.825&ident=SV*+ZI+++156&submit=Aladin+previewer Image 41 Arietis]

{{Stars of Aries}}

{{Authority control}}

{{DEFAULTSORT:41 Arietis}}
[[Category:Flamsteed objects|Arietis, 41]]
[[Category:Bayer objects|Arietis, c]]
[[Category:Henry Draper Catalogue objects|017573]]
[[Category:Hipparcos objects|013209]]
[[Category:Spectroscopic binaries]]
[[Category:Aries (constellation)]]
[[Category:B-type main-sequence stars]]
[[Category:Stars with proper names|Bharani]]
[[Category:Bright Star Catalogue objects|0838]]
[[Category:Durchmusterung objects]]