R136a2
R136a2 (RMC 136a2) adalah bintang Wolf-Rayet yang berada di dekat pusat R136, pusat kondensasi bintang dari gugus terbuka NGC 2070 besar di Nebula Tarantula, wilayah H II masif di Awan Magellan Besar yang berada di dekatnya. galaksi satelit Bima Sakti. Ia memiliki salah satu massa dan luminositas terkonfirmasi tertinggi dari setiap bintang yang diketahui, masing-masing sekitar 195 M☉ dan 4,3 juta L☉.
 The central region of the R136 star cluster as seen in near infrared. R136a1 and R136a2 are the two very close bright stars at the center, with R136a2 being the fainter of the two. | |
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Dorado |
| Asensio rekta | 05j 38m 42.40d[1] |
| Deklinasi | Templat:Dec[1] |
| Magnitudo tampak (V) | 12.34[1] |
| Ciri-ciri | |
| Tahap evolusi | Wolf-Rayet star |
| Kelas spektrum | WN5h[2] |
| Indeks warna B−V | 0.23[1] |
| Astrometri | |
| Jarak | 163,000 tc (50,000[3] pc) |
| Magnitudo mutlak (MV) | -7.52[4] |
| Magnitudo bolometrik mutlak (Mbol) | -12.0[5] |
| Detail[4] | |
| Massa | 195 M☉ |
| Radius | 23.4[5] R☉ |
| Luminositas | 4,266,000 L☉ |
| Luminositas (visual, LV) | 87,000 L☉ |
| Suhu | 53,000 K |
| Rotasi | 200 km/s[6] |
| Usia | 0.3 megatahun |
| Penamaan lain | |
| Referensi basis data | |
| SIMBAD | data |
Referensi
- ^ 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.
- ^ Schnurr, O.; Chené, A.-N.; Casoli, J.; Moffat, A. F. J.; St-Louis, N. (2009). "VLT/SINFONI time-resolved spectroscopy of the central, luminous, H-rich WN stars of R136". Monthly Notices of the Royal Astronomical Society. 397 (4): 2049. arXiv:0905.2934 . Bibcode:2009MNRAS.397.2049S. doi:10.1111/j.1365-2966.2009.15060.x.
- ^ Kesalahan pengutipan: Tag
<ref>tidak sah; tidak ditemukan teks untuk ref bernamadistance - ^ a b 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.
- ^ a b 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.
- ^ Crowther, Paul A.; Schnurr, Olivier; Hirschi, Raphael; Yusof, Norhasliza; Parker, Richard J.; Goodwin, Simon P.; Kassim, Hasan Abu (2010). "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. arXiv:1007.3284 . Bibcode:2010MNRAS.408..731C. doi:10.1111/j.1365-2966.2010.17167.x.
