M36 (疏散星团)

M36
M36
	疏散星团“M 36”的红外光影像；来源：[1]
观测资料 (J2000.0 历元)
星座	御夫座
赤经	05h 36m 18.0s
赤纬	+34° 08′ 24″
距离	4.34 ± 0.87 kly（1.330 ± 0.266 kpc）
视星等 (V)	6.3
视大小 (V)	10 弧分
物理特征
质量	746+606; −334 M☉
半径	7 ly
估计年龄	25.1 Myr
其他特征	C 0532+341, M 36, NGC 1960, OCl 445
	相关条目：疏散星团、NGC天体表

M36，也称为NGC 1960，是在御夫座的一个疏散星团。它是乔瓦尼·巴蒂斯塔·霍迪纳（英语：Giovanni Batista Hodierna）在1654年之前发现的，当时被描述成一个模糊的斑块^[5]。这个星团于1749年被纪晓姆·勒让提独立再度发现，然后梅西耶在1749年观察到它收录至目录中^[6]。M36距离地球大约1,330秒差距光年（4,340光年）^[1]。这个星团与昴宿星团（M45）非常相似，如果与地球的距离相同，它们的大小将会相近^[7]。

这个星团的角直径是7001100000000000000♠10 弧分^[2]，核心半径是7000320000000000000♠3.2 弧分^[8]。它的质量大约为7002746000000000000♠746 太阳质量，线性的潮汐半径为7001106000000000000♠10.6±1.6 秒差距^[3]。吴等人（2009年）根据测光学估计该星团的年龄为2,500万年^[1]而贝尔（Bell）等人提供的估计值是7001263000000000000♠26.3+3.2
−5.2 百万年（2013年）。在恒星中的光度有未消耗掉的锂，意味着年龄约为7001220000000000000♠22±4百万年，这与前面的估计吻合^[8]。

M36只有10颗视星等比10等亮的恒星^[8]和178颗光度至14等以下的恒星^[2]。有38颗成员显示有红外过量，而且其中有一颗特别高^[9]。有一颗视星等9等的恒星是B型变星的候选者^[10]。

星图

参见

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 Wu, Zhen-Yu; et al, The orbits of open clusters in the Galaxy, Monthly Notices of the Royal Astronomical Society, November 2009, 399 (4): 2146–2164, Bibcode:2009MNRAS.399.2146W, arXiv:0909.3737 , doi:10.1111/j.1365-2966.2009.15416.x.
^ ^2.0 ^2.1 ^2.2 Sanner, J.; et al, Photometric and kinematic studies of open star clusters. II. NGC 1960 (M 36) and NGC 2194, Astronomy and Astrophysics, May 2000, 357: 471–483, Bibcode:2000A&A...357..471S.
^ ^3.0 ^3.1 Piskunov, A. E.; et al, Tidal radii and masses of open clusters, Astronomy and Astrophysics, January 2008, 477 (1): 165–172, Bibcode:2008A&A...477..165P, doi:10.1051/0004-6361:20078525.
^ M 36. SIMBAD. 斯特拉斯堡天文资料中心.
^ Fodera-Serio, G.; et al, Hodierna's Observations of Nebulae and his Cosmology, Journal for the History of Astronomy, February 1985, 16 (1): 1, Bibcode:1985JHA....16....1F.
^ Stoyan, Ronald; et al, Atlas of the Messier Objects: Highlights of the Deep Sky, 由Schroeder, Klaus-Peter翻译, Cambridge University Press: 530–533, 2008 [2019-02-13], ISBN 1139473115, （原始内容存档于2019-02-17）
^ Frommert, Hartmut; Kronberg, Christine, Messier 36, The Messier Catalog (Students for the Exploration and Development of Space (SEDS)), August 25, 2007 [2018-11-24], （原始内容存档于2018-10-04）.
^ ^8.0 ^8.1 ^8.2 Jeffries, R. D.; et al, A lithium depletion boundary age of 22 Myr for NGC 1960, Monthly Notices of the Royal Astronomical Society, September 2013, 434 (3): 2438–2450, Bibcode:2013MNRAS.434.2438J, arXiv:1306.6339 , doi:10.1093/mnras/stt1180.
^ Smith, R.; Jeffries, R. D., Dust discs around intermediate-mass and Sun-like stars in the 16 Myr old NGC 1960 open cluster, Monthly Notices of the Royal Astronomical Society, March 2012, 420 (4): 2884–2898, Bibcode:2012MNRAS.420.2884S, arXiv:1110.4219 , doi:10.1111/j.1365-2966.2011.20032.x.
^ Delgado, A. J.; et al, Search for B-Type Variable Stars in Open Clusters, Information Bulletin on Variable Stars, October 1984, 2603: 1, Bibcode:1984IBVS.2603....1D.

外部链接

WikiSky上关于M36 (疏散星团)的内容：DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片

[Wu2009a-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 Wu, Zhen-Yu; et al, The orbits of open clusters in the Galaxy, Monthly Notices of the Royal Astronomical Society, November 2009, 399 (4): 2146–2164, Bibcode:2009MNRAS.399.2146W, arXiv:0909.3737 , doi:10.1111/j.1365-2966.2009.15416.x.

[Sanner2000-2] 2.0 ^2.1 ^2.2 Sanner, J.; et al, Photometric and kinematic studies of open star clusters. II. NGC 1960 (M 36) and NGC 2194, Astronomy and Astrophysics, May 2000, 357: 471–483, Bibcode:2000A&A...357..471S.

[Piskunov2008-3] 3.0 ^3.1 Piskunov, A. E.; et al, Tidal radii and masses of open clusters, Astronomy and Astrophysics, January 2008, 477 (1): 165–172, Bibcode:2008A&A...477..165P, doi:10.1051/0004-6361:20078525.

[SIMBAD-4] M 36. SIMBAD. 斯特拉斯堡天文资料中心.

[FoderaSerio1985-5] Fodera-Serio, G.; et al, Hodierna's Observations of Nebulae and his Cosmology, Journal for the History of Astronomy, February 1985, 16 (1): 1, Bibcode:1985JHA....16....1F.

[Stoyan2008-6] Stoyan, Ronald; et al, Atlas of the Messier Objects: Highlights of the Deep Sky, 由Schroeder, Klaus-Peter翻译, Cambridge University Press: 530–533, 2008 [2019-02-13], ISBN 1139473115, （原始内容存档于2019-02-17）

[Frommert2007-7] Frommert, Hartmut; Kronberg, Christine, Messier 36, The Messier Catalog (Students for the Exploration and Development of Space (SEDS)), August 25, 2007 [2018-11-24], （原始内容存档于2018-10-04）.

[Jeffries2013-8] 8.0 ^8.1 ^8.2 Jeffries, R. D.; et al, A lithium depletion boundary age of 22 Myr for NGC 1960, Monthly Notices of the Royal Astronomical Society, September 2013, 434 (3): 2438–2450, Bibcode:2013MNRAS.434.2438J, arXiv:1306.6339 , doi:10.1093/mnras/stt1180.

[Smith2012-9] Smith, R.; Jeffries, R. D., Dust discs around intermediate-mass and Sun-like stars in the 16 Myr old NGC 1960 open cluster, Monthly Notices of the Royal Astronomical Society, March 2012, 420 (4): 2884–2898, Bibcode:2012MNRAS.420.2884S, arXiv:1110.4219 , doi:10.1111/j.1365-2966.2011.20032.x.

[Delgado1984-10] Delgado, A. J.; et al, Search for B-Type Variable Stars in Open Clusters, Information Bulletin on Variable Stars, October 1984, 2603: 1, Bibcode:1984IBVS.2603....1D.

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