Theta Centauri: Difference between revisions
Jump to navigation
Jump to search
imported>Lithopsian m fix en-dashes pretending to be minus signs |
imported>21.Andromedae →References: Consistent citation scheme (CS1) |
||
| Line 44: | Line 44: | ||
}} | }} | ||
{{Starbox catalog | {{Starbox catalog | ||
| names = {{odlist | name=Menkent | B=θ Cen, Theta Cen | F=5 Centauri | CD=−35° 9260 | FK5=520 | | | names = {{odlist | name=Menkent | B=θ Cen, Theta Cen | F=5 Centauri | CD=−35° 9260 | FK5=520 | GJ=539 | HD=123139 | HIP=68933 | HR=5288 | LHS=2858 | SAO=205188 }}<ref name=SIMBAD/> | ||
}} | }} | ||
{{Starbox reference | {{Starbox reference | ||
| Line 63: | Line 63: | ||
== Properties == | == Properties == | ||
This is an [[stellar evolution|evolved]] [[giant star]] with a [[stellar classification]] of K0 III<ref name=aj132_1_161/> and 1.27 times the [[mass of the Sun]]. It is believed to be fusing helium into carbon and heavier elements within its core, qualifying it as a [[red clump]] star.<ref name=Fuhrmann2012/> It is a southern analog to [[Pollux (star)|Pollux]], the brightest star in [[Gemini (constellation)|Gemini]] and the closest giant to the Sun.<ref name="kaler" /> It is over ten times larger than the Sun and | This is an [[stellar evolution|evolved]] [[giant star]] with a [[stellar classification]] of K0 III<ref name=aj132_1_161/> and 1.27 times the [[mass of the Sun]]. It is believed to be fusing helium into carbon and heavier elements within its core, qualifying it as a [[red clump]] star.<ref name=Fuhrmann2012/> It is a southern analog to [[Pollux (star)|Pollux]], the brightest star in [[Gemini (constellation)|Gemini]] and the closest giant to the Sun.<ref name="kaler" /> It is over ten times larger than the Sun and 56 times more luminous.<ref name=Fuhrmann2012/> The [[stellar atmosphere|outer envelope]] has an [[effective temperature]] of 4,853 [[Kelvin|K]],<ref name=ottoni/> giving it the orange-hued glow of a cool, [[K-type star]].<ref name=csiro/> Soft X-ray emission has been detected from this star, which has an estimated X-ray luminosity of {{nowrap|1.4 × 10<sup>27</sup> erg s<sup>−1</sup>}}.<ref name=aaa335_591/> | ||
==See also== | ==See also== | ||
| Line 85: | Line 85: | ||
| journal=The Astrophysical Journal Supplement | | journal=The Astrophysical Journal Supplement | ||
| volume=203 | issue=2 | pages=20 | id=30 | date=2012 | | volume=203 | issue=2 | pages=20 | id=30 | date=2012 | ||
| doi=10.1088/0067-0049/203/2/30 | bibcode=2012ApJS..203...30F | | doi=10.1088/0067-0049/203/2/30 | bibcode=2012ApJS..203...30F | doi-access=free }}</ref> | ||
<ref name=aaa474_2_653>{{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 }}</ref> | <ref name=aaa474_2_653>{{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 }}</ref> | ||
<ref name=aj132_1_161>{{ | <ref name=aj132_1_161>{{cite journal | display-authors=1 | last1=Gray | first1=R. O. | first2=C. J. | last2=Corbally | first3=R. F. | last3=Garrison | first4=M. T. | last4=McFadden | first5=P. E. | last5=Robinson | title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I | journal=The Astronomical Journal | volume=132 | issue=1 | pages=161–170 |date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G |arxiv = astro-ph/0603770 | s2cid=119476992 }}</ref> | ||
<ref name=scfs>{{ | <ref name=scfs>{{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 | date=1999 | page=1 | bibcode=1999VeARI..35....1W }}</ref> | ||
<ref name=clpl4_99>{{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 | date=1966 | bibcode=1966CoLPL...4...99J }}</ref> | <ref name=clpl4_99>{{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 | date=1966 | bibcode=1966CoLPL...4...99J }}</ref> | ||
<ref name=aaa335_591>{{ | <ref name=aaa335_591>{{cite journal | last1=Schroeder | first1=K.-P. | last2=Huensch | first2=M. | last3=Schmitt | first3=J. H. M. M. | title=X-ray activity and evolutionary status of late-type giants | journal=Astronomy and Astrophysics | volume=335 | pages=591–595 |date=July 1998 | bibcode=1998A&A...335..591S }}</ref> | ||
<ref name=SIMBAD>{{cite simbad | title=tet Cen | access-date=2012-03-01 }}</ref> | <ref name=SIMBAD>{{cite simbad | title=tet Cen | access-date=2012-03-01 }}</ref> | ||
<ref name=csiro>{{ | <ref name=csiro>{{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 | access-date=2012-01-16 | archive-date=2013-12-03 | archive-url=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | url-status=dead }}</ref> | ||
<ref name=kaler>{{ | <ref name=kaler>{{cite web | first1=James B. | last1=Kaler | title=MENKENT (Theta Centauri) | work=Stars | publisher=University of Illinois | url=http://stars.astro.illinois.edu/sow/menkent.html | access-date=2012-03-01 }}</ref> | ||
<ref name=aaa343_222>{{ | <ref name=aaa343_222>{{cite journal | last1=Elgarøy | first1=Øystein | last2=Engvold | first2=Oddbjørn | last3=Lund | first3=Niels | title=The Wilson-Bappu effect of the MgII K line - dependence on stellar temperature, activity and metallicity | journal=Astronomy and Astrophysics | volume=343 | pages=222–228 |date=March 1999 | bibcode=1999A&A...343..222E }}</ref> | ||
<ref name=Kunitzsch>{{cite book | <ref name=Kunitzsch>{{cite book | ||
| Line 117: | Line 116: | ||
<ref name="IAU-LSN">{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |access-date=18 June 2018}}</ref> | <ref name="IAU-LSN">{{cite web | url=https://www.iau.org/public/themes/naming_stars/ | title=Naming Stars |publisher=IAU.org |access-date=18 June 2018}}</ref> | ||
<ref name=Bakos_et_al_2002>{{ | <ref name=Bakos_et_al_2002>{{cite journal | ||
| display-authors=1 | last1=Bakos | first1=Gáspár Á. | | display-authors=1 | last1=Bakos | first1=Gáspár Á. | ||
| last2=Sahu | first2=Kailash C. | last3=Németh | first3=Péter | | last2=Sahu | first2=Kailash C. | last3=Németh | first3=Péter | ||
| Line 124: | Line 123: | ||
| volume=141 | issue=1 | pages=187–193 | date=July 2002 | | volume=141 | issue=1 | pages=187–193 | date=July 2002 | ||
| doi=10.1086/340115 | bibcode=2002ApJS..141..187B | | doi=10.1086/340115 | bibcode=2002ApJS..141..187B | ||
| arxiv=astro-ph/0202164 | s2cid=36667868 | | arxiv=astro-ph/0202164 | s2cid=36667868 }}</ref> | ||
}} | }} | ||
| Line 134: | Line 133: | ||
[[Category:Centaurus]] | [[Category:Centaurus]] | ||
[[Category:Bayer objects|Centauri, Theta]] | [[Category:Bayer objects|Centauri, Theta]] | ||
[[Category:Durchmusterung objects]] | [[Category:Durchmusterung objects|CD-35 09260]] | ||
[[Category:Flamsteed objects|Centauri, 5]] | [[Category:Flamsteed objects|Centauri, 5]] | ||
[[Category:Gliese and GJ objects|0539]] | [[Category:Gliese and GJ objects|0539]] | ||
Latest revision as of 21:59, 28 June 2025
Template:Location mark Location of θ Centauri (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +2.06[2] |
| Characteristics | |
| Evolutionary stage | Red clump[3] |
| Spectral type | K0 III[4] |
| U−B Template:Engvar | +0.90[2] |
| B−V Template:Engvar | +0.99[2] |
| Astrometry | |
| Radial velocity (Rv) | +1.3[5] km/s |
| Proper motion (μ) | RA: −520.53[1] mas/yr Dec.: −518.06[1] mas/yr |
| Parallax (π) | 55.45±0.20 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.87[6] |
| Details | |
| Mass | 1.27[3] Template:Solar mass |
| Radius | Template:Val[3] Template:Solar radius |
| Luminosity | Template:Val[3]Template:Efn Template:Solar luminosity |
| Surface gravity (log g) | Template:Val[7] cgs |
| Temperature | Template:Val[7] K |
| Metallicity [Fe/H] | Template:Val[7] dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
Theta Centauri or θ Centauri, officially named Menkent (Template:IPAc-en),[9][10] is a single[11] star in the southern constellation of Centaurus, the centaur. With an apparent visual magnitude of +2.06,[2] it is the fourth-brightest member of the constellation. Based on parallax measurements obtained during the Hipparcos mission, it is about Template:Convert distant.[1] It has a relatively high proper motion, traversing the celestial sphere at the rate of Template:Val.[12] This suggests that Menkent may have originated in the outer disk of the Milky Way and is merely passing through the solar neighborhood.[13]
Nomenclature
θ Centauri, Latinised to Theta Centauri, is the star's Bayer designation.
It bore the traditional name of Menkent derived from the Arabic word مَنْكِب (mankib) for "shoulder" (of the Centaur), apparently blended with a shortened form of "kentaurus" (centaur). In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[14] to catalog and standardize proper names for stars. The WGSN approved the name Menkent for this star on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.[10]
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning arsenal, refers to an asterism consisting of Theta Centauri, Zeta Centauri, Eta Centauri, 2 Centauri, HD 117440, Xi¹ Centauri, Gamma Centauri, Tau Centauri, D Centauri and Sigma Centauri.[15] Consequently, the Chinese name for Theta Centauri itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx).[16]
Properties
This is an evolved giant star with a stellar classification of K0 III[4] and 1.27 times the mass of the Sun. It is believed to be fusing helium into carbon and heavier elements within its core, qualifying it as a red clump star.[3] It is a southern analog to Pollux, the brightest star in Gemini and the closest giant to the Sun.[13] It is over ten times larger than the Sun and 56 times more luminous.[3] The outer envelope has an effective temperature of 4,853 K,[7] giving it the orange-hued glow of a cool, K-type star.[17] Soft X-ray emission has been detected from this star, which has an estimated X-ray luminosity of 1.4 × 1027 erg s−1.[18]
See also
Notes
References
- ↑ a b c d e f Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa474_2_653 - ↑ a b c d Cite error: Invalid
<ref>tag; no text was provided for refs namedclpl4_99 - ↑ a b c d e f Cite error: Invalid
<ref>tag; no text was provided for refs namedFuhrmann2012 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedaj132_1_161 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedscfs - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa343_222 - ↑ a b c d Cite error: Invalid
<ref>tag; no text was provided for refs namedottoni - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedSIMBAD - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedKunitzsch - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedIAU-LSN - ↑ Script error: No such module "Citation/CS1".
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedBakos_et_al_2002 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedkaler - ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, Template:ISBN.
- ↑ Template:In lang 香港太空館 - 研究資源 - 亮星中英對照表 Template:Webarchive, Hong Kong Space Museum. Accessed on line November 23, 2010.
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedcsiro - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa335_591