R136b

R136b

R136b adalah bintang terang terletak di arah kiri bawah.
Data pengamatan
Epos J2000.0      Ekuinoks J2000.0 (ICRS)
Rasi bintang Dorado
Asensio rekta  05j 38m 42.74d[1]
Deklinasi  −69° 06′ 03.78″[1]
Magnitudo tampak (V) 13.24[1]
Ciri-ciri
Kelas spektrum O4If/WN8[2]
Indeks warna B−V −0.18[1]
Astrometri
Jarak163,000 tc
(49,970[3] pc)
Magnitudo mutlak (MV)−7.31[2]
Detail[2]
Massa93 M☉
Radius22.3[4] R☉
Luminositas1,995,000 L☉
Suhu41,000 K
Usia1.5 megatahun
Penamaan lain
BAT99 111, RMC 136b, [HSH95] 9, [WO84] 4, NGC 2070 MH 637, [CHH92] 26, [P93] 985.
Referensi basis data
SIMBADdata

R136b adalah bintang Wolf-Rayet di gugus R136, Awan Magellan Besar.[5] Ini adalah salah satu bintang paling masif dan paling bercahaya yang diketahui. R136b ditemukan di gugus terbuka R136 padat di pusat NGC 2070, Nebula Tarantula.

R136b memiliki tipe spekttrum transisi antara O yang merupakan kelas bintang super raksasa dan bintang Wolf-Rayet, dengan campuran penyerapan dan garis. Meskipun ia menunjukkan peningkatan helium dan nitrogen di permukaannya, ia masih merupakan bintang yang sangat muda, masih membakar hidrogen di intinya melalui siklus CNO, dan masih efektif sebagai objek deret utama.[6]

Referensi

  1. ^ a b c d Doran, E. I.; Crowther, P. A.; De Koter, A.; Evans, C. J.; McEvoy, C.; Walborn, N. R.; Bastian, N.; Bestenlehner, J. M.; Gräfener, G.; Herrero, A.; Köhler, K.; Maíz Apellániz, J.; Najarro, F.; Puls, J.; Sana, H.; Schneider, F. R. N.; Taylor, W. D.; Van Loon, J. Th.; Vink, J. S. (2013). "The VLT-FLAMES Tarantula Survey. XI. A census of the hot luminous stars and their feedback in 30 Doradus". Astronomy & Astrophysics. 558: A134. arXiv:1308.3412. Bibcode:2013A&A...558A.134D. doi:10.1051/0004-6361/201321824.
  2. ^ a b c Crowther, Paul A.; Caballero-Nieves, S. M.; Bostroem, K. A.; Maíz Apellániz, J.; Schneider, F. R. N.; Walborn, N. R.; Angus, C. R.; Brott, I.; Bonanos, A.; De Koter, A.; De Mink, S. E.; Evans, C. J.; Gräfener, G.; Herrero, A.; Howarth, I. D.; Langer, N.; Lennon, D. J.; Puls, J.; Sana, H.; Vink, J. S. (2016). "The R136 star cluster dissected with Hubble Space Telescope/STIS. I. Far-ultraviolet spectroscopic census and the origin of He II λ1640 in young star clusters". Monthly Notices of the Royal Astronomical Society. 458 (1): 624–659. arXiv:1603.04994. Bibcode:2016MNRAS.458..624C. doi:10.1093/mnras/stw273.{{cite journal}}: Pemeliharaan CS1: DOI bebas tanpa ditandai (link)
  3. ^ Pietrzyński, G; D. Graczyk; W. Gieren; I. B. Thompson; B. Pilecki; A. Udalski; I. Soszyński; et al. (7 March 2013). "An eclipsing-binary distance to the Large Magellanic Cloud accurate to two per cent". Nature. 495 (7439): 76–79. arXiv:1303.2063. Bibcode:2013Natur.495...76P. doi:10.1038/nature11878. PMID 23467166.
  4. ^ Hainich, R.; Rühling, U.; Todt, H.; Oskinova, L. M.; Liermann, A.; Gräfener, G.; Foellmi, C.; Schnurr, O.; Hamann, W. -R. (2014). "The Wolf-Rayet stars in the Large Magellanic Cloud". Astronomy & Astrophysics. 565: A27. arXiv:1401.5474. Bibcode:2014A&A...565A..27H. doi:10.1051/0004-6361/201322696.
  5. ^ Hainich, R.; Rühling, U.; Todt, H.; Oskinova, L. M.; Liermann, A.; Gräfener, G.; Foellmi, C.; Schnurr, O.; Hamann, W.-R. (2014-04-28). "The Wolf-Rayet stars in the Large Magellanic Cloud". Astronomy & Astrophysics. 565: A27. doi:10.1051/0004-6361/201322696. ISSN 0004-6361.
  6. ^ Crowther, Paul A.; Schnurr, Olivier; Hirschi, Raphael; Yusof, Norhasliza; Parker, Richard J.; Goodwin, Simon P.; Kassim, Hasan Abu (2010-07-26). "The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M⊙ stellar mass limit". Monthly Notices of the Royal Astronomical Society. 408 (2): 731–751. doi:10.1111/j.1365-2966.2010.17167.x. ISSN 0035-8711.

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