AH Scorpii

AH Scorpii
Die ligging van AH Sco (in die rooi sirkel).
Die ligging van AH Sco (in die rooi sirkel).
Sterrebeeld Skerpioen
Spektraaltipe M4-5 Ia-Iab[1]
Soort rooisuperreus
Waarnemingsdata (Epog J2000)
Regte klimming 17h 11m 17.01945s[2]
Deklinasie -32° 19′ 30.7140″[2]
Skynmagnitude (m) 7,400±620[3]
Absolute magnitude (M) −5,8[4]
B-V-kleurindeks  +2,57[5]
Besonderhede
Massa (M☉) 10[6]
Radius (R☉) 1 411±124[5]
Ligsterkte (L☉) 330 000+270 000−150,000[5]
Temperatuur (K) 3 450[7] - 3 682[5]
Afstand (ligjaar) 7 400±620
Eienskappe
Veranderlikheid Halfgereeld (SRc)[1]
Ander name
AH Sco, AN 223.1907, GSC 07365-00527, HD 155161, HIP 84071, −32°12429, 2MASS J17111702-3219308, ens.[8]
Portaal  Portaalicoon   Sterrekunde

AH Scorpii (afgekort as AH Sco) is 'n rooisuperreus en veranderlike ster wat in die sterrebeeld Skerpioen geleë is. Dit is een van die grootste en helderste sterre bekend in die Melkweg.

AH Sco se afstand is onseker, maar word geraam op sowat 7 400 ligjare.[6]

Eienskappe

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AH Sco is 'n rooisuperreus wat in 'n stofwolk gehul is[9] en word geklassifiseer as 'n halfgereelde veranderlike ster met 'n hooftydperk van 714 dae. Die skynbare magnitude wissel tussen 6,5 en 9,6.[3] Geen lang sekondêre tydperke is al bespeur nie.[10]

Die ster se temperatuur is sowat 3 682±190 K en die ligsterkte 330 000+270 000−150,000 L☉. Die radius is bereken op 1 411±124 R☉ en die afstand op sowat 7 400 ligjare.[5]

Verwysings

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  1. ↑ 1,0 1,1 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  2. ↑ 2,0 2,1 Brown, A.G.A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ↑ 3,0 3,1 Kiss, L. L.; Szabó, Gy. M.; Bedding, T. R. (2006). "Variability in red supergiant stars: Pulsations, long secondary periods and convection noise". Monthly Notices of the Royal Astronomical Society. 372 (4): 1721–1734. arXiv:astro-ph/0608438. Bibcode:2006MNRAS.372.1721K. doi:10.1111/j.1365-2966.2006.10973.x. S2CID 5203133.
  4. ↑ Baudry, A.; Le Squeren, A. M.; Lepine, J. R. D. (1977). "The supergiant OH stars S Per and AH SCO - Conditions for OH emission in circumstellar envelopes". Astronomy and Astrophysics. 54: 593. Bibcode:1977A&A....54..593B.
  5. ↑ 5,0 5,1 5,2 5,3 5,4 Arroyo-Torres, B.; Wittkowski, M.; Marcaide, J. M.; Hauschildt, P. H. (2013). "The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii". Astronomy & Astrophysics. 554: A76. arXiv:1305.6179. Bibcode:2013A&A...554A..76A. doi:10.1051/0004-6361/201220920. S2CID 73575062.
  6. ↑ 6,0 6,1 Chen, Xi; Shen, Zhi-Qiang (2008). "VLBI Observations of SiO Masers around AH Scorpii". The Astrophysical Journal. 681 (2): 1574–1583. arXiv:0803.1690. Bibcode:2008ApJ...681.1574C. doi:10.1086/588186. S2CID 7603031.
  7. ↑ Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.
  8. ↑ "AH Sco", SIMBAD (Centre de Données astronomiques de Strasbourg), https://simbad.cds.unistra.fr/simbad/sim-id?Ident=AH+Sco, besoek op 2019-06-20 
  9. ↑ Van Loon, J. Th.; Cioni, M.-R. L.; Zijlstra, A. A.; Loup, C. (2005). "An empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich Asymptotic Giant Branch stars". Astronomy and Astrophysics. 438 (1): 273–289. arXiv:astro-ph/0504379. Bibcode:2005A&A...438..273V. doi:10.1051/0004-6361:20042555. S2CID 16724272.
  10. ↑ Percy, John R.; Sato, Hiromitsu (2009). "Long Secondary Periods in Pulsating Red Supergiant Stars". Journal of the Royal Astronomical Society of Canada. 103 (1): 11. Bibcode:2009JRASC.103...11P.

Skakels

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