CK Carinae

CK Carinae
Observationsdata
Epok: J2000.0
StjärnbildKölen
Rektascension10t 24m 25,36 s[1]
Deklination-60° 11′ 29,0 ″[1]
Skenbar magnitud ()7,2 – 8,5[2]
Stjärntyp
SpektraltypM3.5 Iab[3]
B–V+2,21[1]
VariabeltypHalvregelbunden variabel[3]
Astrometri
Radialhastighet ()-3,92[4] km/s
Egenrörelse (µ)RA: -7,351[4] mas/år
Dek.: +2,995[4] mas/år
Parallax ()0,4286 ± 0,0806[4]
Avstånd2 920 ± 150[5] pc
Absolut magnitud ()-6,31[1]
Detaljer
Massa6,0[6] M
Radie761[7] - 1 060[1] R
Luminositet86 000[7] - 158 000[5] L
Temperatur3 550[7] K
Metallicitet+0,05 ± 0,08[6]
Andra beteckningar
HD 90382, CD-59 3058, CPD-59 2101, GSC 08956-01865, IRAS 10226-5956, 2MASS J10242536-6011289, PPM 357970, SAO 238038, TYC 8956-1865-1, UCAC3 60-102032, CK Carinae, WISE J102425.23-601125.9, Gaia DR3 5254827443673628288, Gaia DR1 5254827443673628288, Gaia DR2 5254827443673628288[8]

CK Carinae eller HD 90382, är en ensam stjärna i norra delen av stjärnbilden Kölen. Den har en högsta skenbar magnitud av ca 7,2[1] och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallaxmätning inom Hipparcosuppdraget enligt Gaia Data Release 2 på ca 0,43 mas,[4] beräknas den befinna sig på ett avstånd på ca 7 500 ljusår (ca 2 300 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -4 km/s.[4] Stjärnan förmodas ingå i stjärnföreningen OB1-D på ett uppskattat av stånd av upp till 2 300 parsek. En analys av avstånden för uppenbarligen närliggande OB-stjärnor ger emellertid ett avstånd på 2 920 parsek för CK Carinae.[5]

Egenskaper

CK Carinae är en röd superjättestjärna av spektralklass M3.5 Iab.[3] Den har en massa som är ca 6[6] solmassor, en radie som är ca 761[7] till 1 060[1] solradier och har ca 86 000[7] till 158 000[5] gånger solens utstrålning av energi från dess fotosfär vid en effektiv temperatur av ca 3 600 K.[7]

Ljuskurva för CK Carinae från I-bandet (nära infraröd), plottad från ASAS-data.[9]

CK Carinae klassificeras som en halvregelbunden variabel stjärna och varierar mellan skenbara magnitud +7,2 och +8,5 med en period på cirka 525 dygn.[2]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, CK Carinae, [RW Aurigae - Wikipedia 26 augusti 2022].

Noter

  1. ^ [a b c d e f g] Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal. 628 (2): 973–985. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901. S2CID 15109583.
  2. ^ [a b] 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.
  3. ^ [a b c] 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.
  4. ^ [a b c d e f] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  5. ^ [a b c d] Davies, Ben; Beasor, Emma R. (March 2020). "The 'red supergiant problem': the upper luminosity boundary of Type II supernova progenitors". MNRAS. 493 (1): 468–476. arXiv:2001.06020. Bibcode:2020MNRAS.493..468D. doi:10.1093/mnras/staa174. S2CID 210714093.
  6. ^ [a b c] Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
  7. ^ [a b c d e f] 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. ^ CK Car (unistra.fr). Hämtad 2023-03-30.
  9. ^ "ASAS All Star Catalogue". The All Sky Automated Survey. Hämtad 8 december 2021.

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