IC 4665

IC 4665
IC 4665
	位於蛇夫座β下方的疏散星團IC 4665
觀測資料 (J2000 曆元)
星座	蛇夫座
赤經	17h 46m 13.0s
赤緯	+05° 36′ 54″
距離	1.12 kly (343.6 pc)
視星等 (V)	4.2
視大小 (V)	40′ × 40′
物理特徵
估計年齡	55±3 Myr
其他名称	Cr 349、Mel 179
	相關條目：疏散星团、NGC天體表

IC 4665（科林德349 / 梅洛特179）是在星座蛇夫座的一個疏散星團，位於宗正一（蛇夫座 β）的東北方約1°處^[3]。它是瑞士天文學家讓－菲利浦·德·舍索（英语：Jean-Philippe de Chéseaux）於1745年發現的。該星團距離地球約1,100 光年^[2]。即使用最小的望遠鏡或雙筒望遠鏡都很容易看到^[3]。在足夠暗的地方用肉眼可以直接看到。可能是因為它太鬆散和粗曠了，使得查爾斯·梅西耶和威廉·赫歇爾都沒有編入星表的最亮星團之一。

對這個星團的年齡估計從2000萬年到1億年不等。將恆星的鋰衰竭與其他星團進行比較表明，它大約在5500萬年前開始發展^[2]。主序轉折點年齡的上限為7001420000000000000♠42±12百萬年^[5]。已確定的星團候選成員有819顆^[6]，1977年發現兩顆化學性質特異恆星也是成員星^[7]。

有證據表明，IC 4665正在與位於約4°外的老星團科林德350發生碰撞。目前，它們之間的距離為118.2 ly（36.25 pc），而在形成時相距至少有1,600 ly（500 pc）。目前尚不清楚這兩個星團是否會因碰撞而合併^[8]。

參考資料

^ ^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. 斯特拉斯堡天文資料中心.
^ 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 .

外部連結

维基共享资源上的相關多媒體資源：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. 斯特拉斯堡天文資料中心.

[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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