Beta Arae

{{Starbox begin

| name = β Arae

}}

{{Starbox image

| image=

{{Location mark

|image=Ara constellation map.svg|alt=|float=center|width=240

|label=|position=right

|mark=Red circle.svg|mark_width=12|mark_link=β Arae

|x=524|y=686

}}

| caption=Location of β Arae (circled)

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|17|25|17.989}}

| dec = {{DEC|−55|31|47.57}}

| appmag_v = 2.84

| constell = Ara

}}

{{Starbox character

| type = Red supergiant

| class = K0/1Ib

| b-v = +1.46

| u-b = +1.56

| variable =

}}

{{Starbox astrometry

| radial_v = −0.30{{±|0.20}}

| prop_mo_ra = −8.51

| prop_mo_dec = −25.24

| pm_footnote =

| parallax = 4.5601

| p_error = 0.2077

| parallax_footnote =

| dist_pc = 218.8{{±|12.0|10.4}}

| dist_ly = 714{{±|39|34}}

| dist_footnote =

| absmag_v = −3.494

}}

{{Starbox detail

| source =

| mass = 5.89{{±|0.07}} or 7.89{{±|0.4}}

| radius = 141.4{{±|6.6}}

| luminosity = 5,774{{±|535}}

| temperature = 4,232{{±|17}}

| gravity = 0.97{{±|0.06}}

| metal_fe = 0.5{{±|0.1}}

| rotational_velocity = 5.4{{±|1.0}}

| age_myr = 50.1{{±|4.4}}

}}

{{Starbox catalog

| names = {{odlist | CPD=−55°8100 | FK5=645 | HD=157244 | HIP=85258 | HR=6461 | SAO=244725 | GC=23515 | PPM=345989 }}

}}

{{Starbox reference

| Simbad=bet+Ara

}}

Beta Arae is the brightest star in the constellation of Ara. This is a very luminous, relatively young red supergiant with an apparent visual magnitude of 2.84 and an absolute magnitude of −3.494. Its name is a Bayer designation that is Latinized from β Arae, and abbreviated Beta Ara or β Ara. Based on a photogeometric estimation method, it is 710 light-years away, a distance of which interstellar extinction in the line of sight reduces its apparent magnitude by 0.193 magnitudes.

Characteristics

The spectrum of this star matches a stellar classification of K0/1 Ib, with the luminosity class notation 'Ib' indicating that the star is a supergiant. It has an age estimated at 50 million years, having spent much of its life as a B-type star. Currently, it has expanded to 141 times the Sun's size and is 5,800 times more luminous. Beta Arae is radiating energy from its outer envelope at an effective temperature of {{val|4,200|u=K|fmt=commas}}, which causes it to take on the orange hue of a K-type star. This enlarged star appears to be rotating slowly with a projected rotational velocity of about {{val|5|u=km/s}}. The abundance of elements other than hydrogen and helium, its metallicity, is more than three times that of the Sun.{{efn|name=metal_fe}}

Nomenclature

Beta Arae is the star's Bayer designation. Other designations include HD 157244 (from the Henry Draper Catalogue), HIP 85258 (from the Hipparcos catalogue) and HR 6461 (from the Bright Star Catalogue).

Rarely, this star is called Vasat-ül-cemre a Turkisation of Arabic وسط الجمر (wasaṭ al-jamar), meaning "middle of the embers." The constellation is named in Arabic المجمرة (al-mijmarah), meaning brazier/incense-burner. In Chinese, {{lang|zh|杵}} ({{lang|zh-Latn|Chǔ}}), meaning Pestle, refers to an asterism of β, σ and α Arae. The Chinese name for β Arae is {{lang|zh|杵三}} ({{lang|zh-Latn|Chǔ sān}}, {{langx|en|the Third Star of Pestle}}.)

Notes

{{notelist|refs=

{{efn|name=metal_fe|1 = The abundance is estimated by taking [Fe/H] to the power of ten:{{indent|10}}10^[Fe/H] = 10^+0.5 = 3.1}}

}}

References

{{Reflist|30em|refs=

{{Cite journal | display-authors=1 |last1=Bailer-Jones |first1=C. A. L. |last2=Rybizki |first2=J. |last3=Fouesneau |first3=M. |last4=Demleitner |first4=M. |last5=Andrae |first5=R. |date=2021-03-01 |title=Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3 |journal=The Astronomical Journal |volume=161 |issue=3 |pages=147 |doi=10.3847/1538-3881/abd806 |doi-access=free |arxiv=2012.05220 |bibcode=2021AJ....161..147B |issn=0004-6256}} Data about this star can be seen [https://dc.zah.uni-heidelberg.de/gedr3dist/q/cone/form here].

{{cite web |lang=tr |url=http://www.pultar.org/~mustafa/YAS/V.html#VasatUlCemre |title=YILDIZ ADLARI SÖZLÜĞÜ |trans-title=Glossary of Star Names - V |website=Mustafa Pultar |accessdate=2020-03-04 }}

{{cite web |url=https://sites.google.com/site/urjuzatalkawakib/ara |title=Ara |website=Google |accessdate=2020-03-04 |archive-date=2020-07-26 |archive-url=https://web.archive.org/web/20200726205052/https://sites.google.com/site/urjuzatalkawakib/ara |url-status=dead }}

{{cite book|lang=zh|author=陳久金|trans-title=Chinese horoscope myth|title=中國星座神話|url=https://books.google.com/books?id=0Vex0rYzdu8C|year=2005|publisher=Wunan Book Publishing Co. |isbn=978-986-7332-25-7}}

{{cite web|lang=zh|url=http://aeea.nmns.edu.tw/2006/0607/ap060701.html|title=天文教育資訊網|website=AEEA (Activities of Exhibition and Education in Astronomy)|date=2006-07-01|accessdate=2020-03-04|archive-date=2011-09-28|archive-url=https://web.archive.org/web/20110928011233/http://aeea.nmns.edu.tw/2006/0607/ap060701.html|url-status=dead}}

{{cite journal | 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 |arxiv = 0708.1752 | s2cid=18759600 }}

{{cite journal | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | journal=Veröff. Astron. Rechen-Inst. Heidelb | volume=35 | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | year=1999 | page=1 | bibcode=1999VeARI..35....1W }}

{{cite journal | 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 | pages=99 | year=1966 | bibcode=1966CoLPL...4...99J }}

{{Cite journal |last=Houk |first=N. |last2=Cowley |first2=A. P. |date=1994-11-01 |title=VizieR Online Data Catalog: Michigan catalogue for the HD stars, vol. 1 (Houk+, 1975) |bibcode=1994yCat.3031....0H |journal=VizieR Online Data Catalog |volume=3031 |pages=III/31B}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=III/31&HD=157244 Beta Arae's database entry] at VizieR.

{{cite journal | display-authors=1 | last1=De Medeiros | first1=J. R. | last2=Udry | first2=S. | last3=Burki | first3=G. | last4=Mayor | first4=M. | title=A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars | journal=Astronomy and Astrophysics | volume=395 | pages=97–98 |date=November 2002 | issue=1 | doi=10.1051/0004-6361:20021214 | bibcode=2002A&A...395...97D | arxiv=1312.3474 }}

{{cite journal | display-authors=1 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | issue=1 | pages=190–200 |date=January 2011 | doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T |arxiv = 1007.4883 | s2cid=118629873 }}

{{cite simbad

| title=bet Ara

| access-date=2012-01-15

| postscript=. | mode = cs2 }}

{{cite web |title=The Colour of Stars |date=December 21, 2004 |work=Australia Telescope, Outreach and Education |publisher=Commonwealth Scientific and Industrial Research Organisation |url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |accessdate=2012-01-16 |url-status=dead |archiveurl=https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html |archivedate=2012-03-18 }}

{{Cite journal | display-authors=1 |last1=Soubiran |first1=C. |last2=Creevey |first2=O. L. |last3=Lagarde |first3=N. |last4=Brouillet |first4=N. |last5=Jofré |first5=P. |last6=Casamiquela |first6=L. |last7=Heiter |first7=U. |last8=Aguilera-Gómez |first8=C. |last9=Vitali |first9=S. |last10=Worley |first10=C. |last11=de Brito Silva |first11=D. |date=2024-02-01 |title=Gaia FGK benchmark stars: Fundamental Teff and log g of the third version |bibcode=2024A&A...682A.145S |journal=Astronomy and Astrophysics |volume=682 |pages=A145 |doi=10.1051/0004-6361/202347136 |arxiv=2310.11302 |issn=0004-6361}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A%2BA/682/A145&recno=162 Beta Arae's database entry] at VizieR.

{{cite journal|bibcode= 2001A&A...374.1085C|title= On the Wilson-Bappu relationship in the Mg II k line|journal= Astronomy and Astrophysics|volume= 374|issue= 3|pages= 1085–1091 | display-authors=1 |last1= Cassatella|first1= A.|last2= Altamore|first2= A.|last3= Badiali|first3= M.|last4= Cardini|first4= D.|year= 2001|doi= 10.1051/0004-6361:20010816|arxiv = astro-ph/0106070 |s2cid= 16286422}}

{{cite web | first=James B. | last=Kaler | work=Stars | title=BETA ARA (Beta Arae) | publisher=University of Illinois | url=http://stars.astro.illinois.edu/sow/betaara.html | accessdate=2012-01-15 }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%206461 HR 6461]
[http://aladin.u-strasbg.fr/AladinPreview?-c=17+25+17.9887-55+31+47.583&ident=*+bet+Ara&submit=Aladin+previewer Image Beta Arae]

Category:K-type supergiants

Category:K-type bright giants

Category:Ara (constellation)