獵戶座θ1C

**獵戶座θ¹C**
	; 獵戶四邊形星團的獵戶座θ1C和其它成員
觀測資料; 曆元 J2000
星座	獵戶座
星官
赤經	05h 35m 16.46375s
赤緯	−05° 23′ 22.8486″
視星等（V）	5.13
特性
光谱分类	O6Vp + B0V
U−B 色指数	−0.95
B−V 色指数	+0.02
变星类型	suspected
天体测定
徑向速度 (Rv)	+23.6 ± 2.0 km/s
自行 (μ)	赤经：−4.13 mas/yr ; 赤纬：6.82 mas/yr
视差 (π)	2.11 ± 0.41 mas
距离	410 ± 20 pc
绝对星等 (MV)	−4.9
詳細資料
C1
質量	33 ± 5 M☉
半徑	10.6 ± 1.5 R☉
表面重力 (log g)	4.1
亮度	204,000 L☉
溫度	39,000 ± 1,000 K
自轉速度 (v sin i)	24 ± 3 km/s
年齡	2.5 ± 0.5 Myr
C2
質量	11 ± 5 M☉
	軌道
主星	C1
伴星	C2
繞行週期 (P)	11.05 ± 0.03 yr
半長軸 (a)	40.00 ± 3.00"
偏心率 (e)	0.534 ± 0.050
倾斜角 (i)	100.7 ± 1.0°
升交点黃經 (Ω)	25.3 ± 1.5°
近心點幅角 (ω); (secondary)	290.9 ± 2.5°
其他命名
	41 Ori C, HR 1895, HD 37022, SAO 132314, NSV 2294
參考資料庫
SIMBAD	资料

獵戶座θ¹C（θ¹ Orionis C）是位於獵戶座星雲內的疏散星團，獵戶四邊形星團中的一員。這顆恆星C是在這個星團心臟4顆中質量最大也最亮的一顆。它是O型主序星，並且有幾顆B型主序星的伴星。它的高光度和距離（大約1,500光年）使他的視星等為5.1等。

獵戶座θ¹包含數顆恆星，主要是由梯形星團彼此相距約1弧分的4顆恆星組成。獵戶座θ²是距離更遠的一個恆星集團，有三顆主要的恆星和幾顆微弱的伴星，與獵戶座θ¹相距1-2弧。

獵戶座θ¹C本身就是兩顆大質量恆星，C1和C2，再加上一顆看似逃逸，但非常靠近的微弱伴星的聯星系統^[8]。

獵戶座θ¹C1負責生成大部分的紫外線，並使獵戶座大星雲緩慢的電離（或許是光致蒸發）。這些紫外線也是獵戶座星雲被照亮和發光的主要原因。這顆恆星吹出強烈的恆星風，強度超過太陽風數十萬倍，氣體向外吹送的速度在1,000 km/s。

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357
^ ^2.0 ^2.1 ^2.2 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.
^ ^3.0 ^3.1 ^3.2 Balega, Yu. Yu.; Chentsov, E. L.; Leushin, V. V.; Rzaev, A. Kh.; Weigelt, G. Young massive binary θ 1 OriC: Radial velocities of components. Astrophysical Bulletin. 2014, 69 (1): 46–57. Bibcode:2014AstBu..69...46B. ISSN 1990-3413. doi:10.1134/S1990341314010052.
^ Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013). VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 2009, 1: 02025. Bibcode:2009yCat....102025S.
^ Olivares, J.; Sánchez, L. J.; Ruelas-Mayorga, A.; Allen, C.; Costero, R.; Poveda, A. KINEMATICS OF THE ORION TRAPEZIUM BASED ON DIFFRACTO-ASTROMETRY AND HISTORICAL DATA. The Astronomical Journal. 2013, 146 (5): 106. Bibcode:2013AJ....146..106O. ISSN 0004-6256. arXiv:1310.0769 . doi:10.1088/0004-6256/146/5/106.
^ ^6.0 ^6.1 Kraus, S.; Weigelt, G.; Balega, Y. Y.; Docobo, J. A.; Hofmann, K.-H.; Preibisch, T.; Schertl, D.; Tamazian, V. S.; Driebe, T.; Ohnaka, K.; Petrov, R.; Schöller, M.; Smith, M. Tracing the young massive high-eccentricity binary system θ1Orionis C through periastron passage. Astronomy and Astrophysics. 2009, 497 (1): 195–207. Bibcode:2009A&A...497..195K. ISSN 0004-6361. arXiv:0902.0365 . doi:10.1051/0004-6361/200810368.
^ ^7.0 ^7.1 ^7.2 ^7.3 ^7.4 ^7.5 ^7.6 Simón-Díaz, S.; Herrero, A.; Esteban, C.; Najarro, F. Detailed spectroscopic analysis of the Trapezium cluster stars inside the Orion nebula. Astronomy and Astrophysics. 2006, 448 (1): 351–366. Bibcode:2006A&A...448..351S. ISSN 0004-6361. doi:10.1051/0004-6361:20053066.
^ Vitrichenko, E. A.; Lehmann, H.; Klochkova, V.; Bychkova, L.; Bychkov, V. Detection of a star escaping from the Orion Trapezium. Astrophysics. 2010, 53 (2): 306–308. Bibcode:2010Ap.....53..306V. ISSN 0571-7256. doi:10.1007/s10511-010-9120-2.

[hipparcos-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357

[ducati-2] 2.0 ^2.1 ^2.2 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.

[balega2014-3] 3.0 ^3.1 ^3.2 Balega, Yu. Yu.; Chentsov, E. L.; Leushin, V. V.; Rzaev, A. Kh.; Weigelt, G. Young massive binary θ 1 OriC: Radial velocities of components. Astrophysical Bulletin. 2014, 69 (1): 46–57. Bibcode:2014AstBu..69...46B. ISSN 1990-3413. doi:10.1134/S1990341314010052.

[gcvs-4] Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013). VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 2009, 1: 02025. Bibcode:2009yCat....102025S.

[OlivaresSánchez2013-5] Olivares, J.; Sánchez, L. J.; Ruelas-Mayorga, A.; Allen, C.; Costero, R.; Poveda, A. KINEMATICS OF THE ORION TRAPEZIUM BASED ON DIFFRACTO-ASTROMETRY AND HISTORICAL DATA. The Astronomical Journal. 2013, 146 (5): 106. Bibcode:2013AJ....146..106O. ISSN 0004-6256. arXiv:1310.0769 . doi:10.1088/0004-6256/146/5/106.

[kraus2009-6] 6.0 ^6.1 Kraus, S.; Weigelt, G.; Balega, Y. Y.; Docobo, J. A.; Hofmann, K.-H.; Preibisch, T.; Schertl, D.; Tamazian, V. S.; Driebe, T.; Ohnaka, K.; Petrov, R.; Schöller, M.; Smith, M. Tracing the young massive high-eccentricity binary system θ1Orionis C through periastron passage. Astronomy and Astrophysics. 2009, 497 (1): 195–207. Bibcode:2009A&A...497..195K. ISSN 0004-6361. arXiv:0902.0365 . doi:10.1051/0004-6361/200810368.

[Simón-DíazHerrero2006-7] 7.0 ^7.1 ^7.2 ^7.3 ^7.4 ^7.5 ^7.6 Simón-Díaz, S.; Herrero, A.; Esteban, C.; Najarro, F. Detailed spectroscopic analysis of the Trapezium cluster stars inside the Orion nebula. Astronomy and Astrophysics. 2006, 448 (1): 351–366. Bibcode:2006A&A...448..351S. ISSN 0004-6361. doi:10.1051/0004-6361:20053066.

[VitrichenkoLehmann2010-8] Vitrichenko, E. A.; Lehmann, H.; Klochkova, V.; Bychkova, L.; Bychkov, V. Detection of a star escaping from the Orion Trapezium. Astrophysics. 2010, 53 (2): 306–308. Bibcode:2010Ap.....53..306V. ISSN 0571-7256. doi:10.1007/s10511-010-9120-2.

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獵戶座θ1C

參考資料

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