IC 4665

IC 4665
IC 4665
	位于蛇夫座β下方的疏散星团IC 4665
观测资料 (J2000 历元)
星座	蛇夫座
赤经	17h 46m 13.0s
赤纬	+05° 36′ 54″
距离	1.12 kly (343.6 pc)
视星等 (V)	4.2
视大小 (V)	40′ × 40′
物理特征
估计年龄	55±3 Myr
其他名称	Cr 349、Mel 179
	相关条目：疏散星团、NGC天体表

IC 4665（科林德349 / 梅洛特179）是在星座蛇夫座的一个疏散星团，位于宗正一（蛇夫座 β）的东北方约1°处^[3]。它是瑞士天文学家让－菲利浦·德·舍索（英语：Jean-Philippe de Chéseaux）于1745年发现的。该星团距离地球约1,100 光年^[2]。即使用最小的望远镜或双筒望远镜都很容易看到^[3]。在足够暗的地方用肉眼可以直接看到。可能是因为它太松散和粗旷了，使得查尔斯·梅西耶和威廉·赫歇尔都没有编入星表的最亮星团之一。

对这个星团的年龄估计从2000万年到1亿年不等。将恒星的锂衰竭与其他星团进行比较表明，它大约在5500万年前开始发展^[2]。主序转折点年龄的上限为7001420000000000000♠42±12百万年^[5]。已确定的星团候选成员有819颗^[6]，1977年发现两颗化学性质特异恒星也是成员星^[7]。

有证据表明，IC 4665正在与位于约4°外的老星团科林德350发生碰撞。目前，它们之间的距离为118.2 ly（36.25 pc），而在形成时相距至少有1,600 ly（500 pc）。目前尚不清楚这两个星团是否会因碰撞而合并^[8]。

参考资料

^ ^1.0 ^1.1 Tarricq, Y.; et al. 3D kinematics and age distribution of the open cluster population. Astronomy & Astrophysics. March 2021, 647. id. A19. Bibcode:2021A&A...647A..19T. arXiv:2012.04017 . doi:10.1051/0004-6361/202039388.
^ ^2.0 ^2.1 ^2.2 ^2.3 Jeffries, R. D.; et al. A revised age greater than 50 Myr for the young cluster IC 4665. Monthly Notices of the Royal Astronomical Society. 2023, 526: 1260–1267. Bibcode:2023MNRAS.526.1260J. arXiv:2309.07619 . doi:10.1093/mnras/stad2845 .
^ ^3.0 ^3.1 ^3.2 ^3.3 Crossen, Craig; Rhemann, Gerald. Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. 2012: 60. ISBN 9783709106266.
^ IC 4665. SIMBAD. 斯特拉斯堡天文资料中心.
^ Cargile, P. A.; James, D. J. Employing a New, BVI_c Photometric Survey of IC 4665 to Investigate the Age of This Young Open Cluster. The Astronomical Journal. September 2010, 140 (3): 677–691. Bibcode:2010AJ....140..677C. arXiv:1005.3329 . doi:10.1088/0004-6256/140/3/677.
^ Miret-Roig, N.; et al. Searching for debris discs in the 30 Myr open cluster IC 4665. Astronomy & Astrophysics. September 2020, 641. id. A156. Bibcode:2020A&A...641A.156M. arXiv:2007.04992 . doi:10.1051/0004-6361/202038205.
^ Levato, H.; Malaroda, S. Spectroscopic study of two peculiar stars in IC 4665 : HD 161480 and HD 161733. Publications of the Astronomical Society of the Pacific. February 1977, 89: 84–94. Bibcode:1977PASP...89...84L. doi:10.1086/130078.
^ Piatti, Andrés E.; Malhan, Khyati. First evidence of a collision between two unrelated open clusters in the Milky Way. Monthly Notices of the Royal Astronomical Society: Letters. March 2022, 511 (1): L1–L7. Bibcode:2022MNRAS.511L...1P. arXiv:2112.03786 . doi:10.1093/mnrasl/slab130 .

外部链接

维基共享资源上的相关多媒体资源：IC 4665
IC 4665 @ SEDS IC objects pages
IC 4665 www.univie.ac.at
WikiSky上关于IC 4665的内容：DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片
X-Ray Activity in the Open Cluster IC 4665 National Aeronautics and Space Administration

Template:Ophiuchus

[Tarricq_et_al_2021-1] 1.0 ^1.1 Tarricq, Y.; et al. 3D kinematics and age distribution of the open cluster population. Astronomy & Astrophysics. March 2021, 647. id. A19. Bibcode:2021A&A...647A..19T. arXiv:2012.04017 . doi:10.1051/0004-6361/202039388.

[Jeffries_et_al_2023-2] 2.0 ^2.1 ^2.2 ^2.3 Jeffries, R. D.; et al. A revised age greater than 50 Myr for the young cluster IC 4665. Monthly Notices of the Royal Astronomical Society. 2023, 526: 1260–1267. Bibcode:2023MNRAS.526.1260J. arXiv:2309.07619 . doi:10.1093/mnras/stad2845 .

[Crossen_Rhemann_2012-3] 3.0 ^3.1 ^3.2 ^3.3 Crossen, Craig; Rhemann, Gerald. Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. 2012: 60. ISBN 9783709106266.

[simbad-4] IC 4665. SIMBAD. 斯特拉斯堡天文资料中心.

[Cargile_James_2010-5] Cargile, P. A.; James, D. J. Employing a New, BVI_c Photometric Survey of IC 4665 to Investigate the Age of This Young Open Cluster. The Astronomical Journal. September 2010, 140 (3): 677–691. Bibcode:2010AJ....140..677C. arXiv:1005.3329 . doi:10.1088/0004-6256/140/3/677.

[Miret-Roig_et_al_2020-6] Miret-Roig, N.; et al. Searching for debris discs in the 30 Myr open cluster IC 4665. Astronomy & Astrophysics. September 2020, 641. id. A156. Bibcode:2020A&A...641A.156M. arXiv:2007.04992 . doi:10.1051/0004-6361/202038205.

[Levato_Malaroda_1977-7] Levato, H.; Malaroda, S. Spectroscopic study of two peculiar stars in IC 4665 : HD 161480 and HD 161733. Publications of the Astronomical Society of the Pacific. February 1977, 89: 84–94. Bibcode:1977PASP...89...84L. doi:10.1086/130078.

[Piatti_Malhan_2022-8] Piatti, Andrés E.; Malhan, Khyati. First evidence of a collision between two unrelated open clusters in the Milky Way. Monthly Notices of the Royal Astronomical Society: Letters. March 2022, 511 (1): L1–L7. Bibcode:2022MNRAS.511L...1P. arXiv:2112.03786 . doi:10.1093/mnrasl/slab130 .

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