Menkalinan

Menkalinan
	Menkalinan se ligging (in die rooi sirkel).
Sterrebeeld	Koetsier
Bayer-naam	Beta Aurigae
Spektraaltipe	A1m IV + A1m IV
Soort	Dubbelster
	Waarnemingsdata (Epog J2000)
Regte klimming	05h 59m 31.72293s
Deklinasie	+44° 56′ 50.7573″
Skynmagnitude (m)	1,9
Absolute magnitude (M)	0,55/0,76
B-V-kleurindeks	+0,03
U-B-kleurindeks	+0,05
	Besonderhede
Komponent 1	β Aur A
Massa (M☉)	2,389 ± 0,013
Radius (R☉)	2,77
Ligsterkte (L☉)	48
Temperatuur (K)	9 350
Rotasiespoed (km/s)	33
Komponent 2	β Aur B
Massa (M☉)	2,327 ± 0,013
Radius (R☉)	2,63
Ligsterkte (L☉)	48
Temperatuur (K)	9 200
Rotasiespoed (km/s)	34
	Eienskappe
Afstand (ligjaar)	81,1
Ouderdom (jaar)	570 miljoen
Veranderlikheid	Algol
Veelvoudigheid	2/3
	Ander name
	34 Aurigae, ADS 4556, BD+44 1328, FK5 227, ; HD 40183, HIP 28360, HR 2088, ; SAO 40750
Portaal	Sterrekunde

Menkalinan (ook bekend as Beta Aurigae of β Aur) is ’n dubbelster^[9] in die noordelike sterrebeeld Koetsier (Auriga). Die gekombineerde skynbare magnitude is 1,9^[3] en dit is dus een van die helderste sterre in die naglug en die tweede helderste ster in die Koetsier, naas Capella. Volgens parallaksmetings is dit sowat 81,1 ligjare van die Son af.^[2]

Name

Die ster se Bayer-naam is "Beta Aurigae". Sy tradisionele naam, "Menkalinan", kom van die Arabiese منكب ذي العنان mankib ðī-l-‘inān, "skouer van die leiselhouer". In 2016 het die Internasionale Astronomiese Unie se sternaamwerkgroep (WGSN) die amptelike naam "Menkalinan" vir die ster goedgekeur.^[10]

Eienskappe

Al lyk Menkalinan met die blote oog soos ’n enkelster, is dit ’n dubbelster. Die twee sterre is A-tipe subreuse met metaallyne;^[1] hulle het rofweg dieselfde massa en radius, onderskeidelik 2,3 en 2,6/2,7 keer dié van die Son. Hulle is ’n verduisterende dubbelster; hulle gekombineerde skynbare magnitude wissel oor ’n tydperk van 3,96 dae tussen 1,89 en 1,94.^[11]

Sowat 13,9 ± 0,3 boogsekondes van hulle af is ’n metgeselster wat 8,5 magnitudes dowwer as die dubbelster is. Dit is ’n kandidaatlid van Beta Aurigae, wat dit ’n driedubbele stelsel sal maak. Dit kan die bron van X-strale uit die omgewing wees.^[12]

Verwysings

↑ ^1,0 ^1,1 Southworth, J.; Bruntt, H.; Buzasi, D. L. (Junie 2007), "Eclipsing binaries observed with the WIRE satellite. II. β Aurigae and non-linear limb darkening in light curves", Astronomy and Astrophysics 467 (3): 1215–1226, doi:10.1051/0004-6361:20077184, Bibcode: 2007A&A...467.1215S.
↑ ^2,0 ^2,1 ^2,2 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V
↑ ^3,0 ^3,1 ^3,2 ^3,3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J
↑ Torres, G.; Andersen, J.; Giménez, A. (Februarie 2010), "Accurate masses and radii of normal stars: modern results and applications", The Astronomy and Astrophysics Review 18 (1–2): 67–126, doi:10.1007/s00159-009-0025-1, Bibcode: 2010A&ARv..18...67T
↑ ^5,0 ^5,1 Behr, Bradford B. et al. (Julie 2011), "Stellar Astrophysics with a Dispersed Fourier Transform Spectrograph. II. Orbits of Double-lined Spectroscopic Binaries", The Astronomical Journal 142 (1): 6, doi:10.1088/0004-6256/142/1/6, Bibcode: 2011AJ....142....6B
↑ ^6,0 ^6,1 ^6,2 ^6,3 ^6,4 ^6,5 ^6,6 Nordstrom, B.; Johansen, K. T. (1994), "Radii and masses for beta Aurigae", Astronomy and Astrophysics 291 (3): 777–785, Bibcode: 1994A&A...291..777N
↑ ^7,0 ^7,1 Kaler, James B., "MENKALINAN (Beta Aurigae)", Stars (University of Illinois), http://stars.astro.illinois.edu/sow/menkalinan.html, besoek op 2010-01-23
↑ "bet Aur". Simbad. Centre de données astronomiques de Strasbourg. Besoek op 18 Julie 2012.
↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
↑ "Bulletin of the IAU Working Group on Star Names, No. 1" (PDF). Besoek op 28 Julie 2016.
↑ Malkov, O. Yu.; Oblak, E.; Snegireva, E. A.; Torra, J. (Februarie 2006), "A catalogue of eclipsing variables", Astronomy and Astrophysics 446 (2): 785–789, doi:10.1051/0004-6361:20053137, Bibcode: 2006A&A...446..785M.
↑ De Rosa, R. J. et al. (Julie 2011), "The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars", Monthly Notices of the Royal Astronomical Society 415 (1): 854–866, doi:10.1111/j.1365-2966.2011.18765.x, Bibcode: 2011MNRAS.415..854D

Eksterne skakels

Menkalinan
’n Foto van Beta Aurigae
CCDM J05596+4457 Katalogus
Smithsonian/Nasa-astrofisikadatastelsel
Hierdie artikel is vertaal uit die Engelse Wikipedia

[aaa467_3_1215-1] 1,0 ^1,1 Southworth, J.; Bruntt, H.; Buzasi, D. L. (Junie 2007), "Eclipsing binaries observed with the WIRE satellite. II. β Aurigae and non-linear limb darkening in light curves", Astronomy and Astrophysics 467 (3): 1215–1226, doi:10.1051/0004-6361:20077184, Bibcode: 2007A&A...467.1215S.

[aaa474_2_653-2] 2,0 ^2,1 ^2,2 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V

[clpl4_99-3] 3,0 ^3,1 ^3,2 ^3,3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J

[aar18_1_2-4] Torres, G.; Andersen, J.; Giménez, A. (Februarie 2010), "Accurate masses and radii of normal stars: modern results and applications", The Astronomy and Astrophysics Review 18 (1–2): 67–126, doi:10.1007/s00159-009-0025-1, Bibcode: 2010A&ARv..18...67T

[aj142_1_6-5] 5,0 ^5,1 Behr, Bradford B. et al. (Julie 2011), "Stellar Astrophysics with a Dispersed Fourier Transform Spectrograph. II. Orbits of Double-lined Spectroscopic Binaries", The Astronomical Journal 142 (1): 6, doi:10.1088/0004-6256/142/1/6, Bibcode: 2011AJ....142....6B

[Nordstrom-6] 6,0 ^6,1 ^6,2 ^6,3 ^6,4 ^6,5 ^6,6 Nordstrom, B.; Johansen, K. T. (1994), "Radii and masses for beta Aurigae", Astronomy and Astrophysics 291 (3): 777–785, Bibcode: 1994A&A...291..777N

[kaler-7] 7,0 ^7,1 Kaler, James B., "MENKALINAN (Beta Aurigae)", Stars (University of Illinois), http://stars.astro.illinois.edu/sow/menkalinan.html, besoek op 2010-01-23

[SIMBAD-8] "bet Aur". Simbad. Centre de données astronomiques de Strasbourg. Besoek op 18 Julie 2012.

[mnras389_2_869-9] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.

[WGSN1-10] "Bulletin of the IAU Working Group on Star Names, No. 1" (PDF). Besoek op 28 Julie 2016.

[aaa446_2_785-11] Malkov, O. Yu.; Oblak, E.; Snegireva, E. A.; Torra, J. (Februarie 2006), "A catalogue of eclipsing variables", Astronomy and Astrophysics 446 (2): 785–789, doi:10.1051/0004-6361:20053137, Bibcode: 2006A&A...446..785M.

[mnras415_1_854-12] De Rosa, R. J. et al. (Julie 2011), "The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars", Monthly Notices of the Royal Astronomical Society 415 (1): 854–866, doi:10.1111/j.1365-2966.2011.18765.x, Bibcode: 2011MNRAS.415..854D

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