WR 136
WR 136是位于天鹅座的一颗沃夫–瑞叶星。它位于眉月星云的中心。据估计，它的年龄约为470万年，已经接近生命的尽头。预计在几十万年内，它将爆炸成为超新星[8]。
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 天鹅座 |
| 星官 | |
| 赤经 | 20h 12m 06.5421s[2] |
| 赤纬 | +38° 21′ 17.779″[2] |
| 视星等（V） | 7.50[3] |
| 特性 | |
| 光谱分类 | WN6(h)-s[4] |
| U−B 色指数 | -0.37[3] |
| B−V 色指数 | 0.01[3] |
| 天体测定 | |
| 径向速度 (Rv) | −21.6[5] km/s |
| 自行 (μ) | 赤经：−7.54[6] mas/yr 赤纬：−7.38[6] mas/yr |
| 视差 (π) | 0.4865 ± 0.0337[6] mas |
| 距离 | 6,700 ± 500 ly (2,100 ± 100 pc) |
| 绝对星等 (MV) | −5.63[4] |
| 详细资料 | |
| 质量 | 21[4] M☉ |
| 半径 | 5.10[4] R☉ |
| 亮度 | 600,000[4] L☉ |
| 温度 | 70,800[4] K |
| 自转 | 37[7] |
| 年龄 | 4.7[8] Myr |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
根据最近的估计，WR 136比太阳亮60万倍，质量大21倍，直径大5.1倍。它的表面温度约为70,000k[4]。
WR 136在大约120,000–240,000年前成为红超巨星时，吹掉了一个质量约为5 M☉的物质外壳，并且仍在以80公里/秒的速度膨胀[9]。现时，它的快速恒星风以约380万英里/小时（1700公里/秒）的速度从恒星喷出[10]，正在追赶早先从恒星喷出的物质，并将其塑造成一个外壳。从WR 136炙热表面发射的紫外线使外壳发光[9]。
有一些证据表明WR 136可能是一对联星。它的伴星是一颗恒星分类K或M的低质量恒星，每5.13天绕沃夫–瑞叶星一周，是低质量X射线联星系统的前身[11]。
参考资料 编辑
- ^ MAST: Barbara A. Mikulski Archive for Space Telescopes. Space Telescope Science Institute. [8 December 2021].
- ^ 2.0 2.1 Van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357.
- ^ 3.0 3.1 3.2 Ducati, J. R. VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system. CDS/ADC Collection of Electronic Catalogues. 2002, 2237: 0. Bibcode:2002yCat.2237....0D.
- ^ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Sota, A.; Maíz Apellániz, J.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J.; Oskinova, L. M. The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters. Astronomy & Astrophysics. 2019, A57: 625. Bibcode:2019A&A...625A..57H. S2CID 104292503. arXiv:1904.04687 . doi:10.1051/0004-6361/201834850.
- ^ Barbier-Brossat, M.; Petit, M.; Figon, P. Third bibliographic catalogue of stellar radial velocities (Text in French). Astronomy and Astrophysics Supplement Series. 1994, 108: 603. Bibcode:1994A&AS..108..603B.
- ^ 6.0 6.1 6.2 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051. VizieR中此天体在盖亚望远镜第二批数据发布的记录
- ^ Gräfener, G.; Vink, J. S.; Harries, T. J.; Langer, N. Rotating Wolf-Rayet stars in a post RSG/LBV phase. Astronomy & Astrophysics. 2012, 547: A83. Bibcode:2012A&A...547A..83G. S2CID 55530420. arXiv:1210.1153 . doi:10.1051/0004-6361/201118664.
- ^ 8.0 8.1 Moore, Brian D.; Hester, J. Jeff; Scowen, Paul A. Hubble Space Telescope Observations of the Wolf-Rayet Nebula NGC 6888. The Astronomical Journal. 2000, 119 (6): 2991. Bibcode:2000AJ....119.2991M. S2CID 17769849. arXiv:astro-ph/0003053 . doi:10.1086/301389.
- ^ 9.0 9.1 Mesa-Delgado, A.; Esteban, C.; García-Rojas, J.; Reyes-Pérez, J.; Morisset, C.; Bresolin, F. The Trace of the CNO Cycle in the Ring Nebula NGC 6888. The Astrophysical Journal. 2014, 785 (2): 100. Bibcode:2014ApJ...785..100M. S2CID 118596124. arXiv:1402.6181 . doi:10.1088/0004-637X/785/2/100.
- ^ Hamann, W.-R.; Wessolowski, U.; Koesterke, L. Non-LTE spectral analyses of Wolf-Rayet stars: The nitrogen spectrum of the WN6 prototype HD 192163 (WR136). Astronomy and Astrophysics. 1994, 281: 184. Bibcode:1994A&A...281..184H. ISSN 0004-6361.
- ^ Rustamov, D. N.; Cherepashchuk, A. M. The Wolf-Rayet star HD 192163 as a possible evolutionary progenitor of a low-mass X-ray binary. Astronomy Reports. 2011, 55 (4): 347–358 [17 July 2013]. Bibcode:2011ARep...55..347R. S2CID 121379439. doi:10.1134/S1063772911010069.
进阶读物 编辑
- Bychkov, K. V.; Sitnik, T. G. Stratification of optical emission from NGC 6888 as a trace of the interaction between Wolf-Rayet stellar wind and the shell of a red supergiant. Astronomy Letters. 2006, 32 (6): 406. Bibcode:2006AstL...32..406B. S2CID 123039046. doi:10.1134/S1063773706060041.