NGC 4103

NGC 4103
观测数据 (J2000 历元)
星座	南十字座
赤经	12h 00m 39s
赤纬	-61° 55′ 00″
距离	5,320 光年 (1,632 秒差距)
视星等 (V)	7.4
视直径 (V)	12'
物理性质
质量	1,180 M☉
估计年龄	25 million years
其他名称（标示）	柯林德（英语：Collinder catalog） 252、Melotte 109
	相关条目：疏散星团、疏散星团列表

NGC 4103是詹姆士·敦洛普于1826年在南十字座发现的一个疏散星团，它位于银河系的船底-人马臂，距离我们大约5,000光年 ^[5]。

性质[编辑]

NGC 4103是一个年轻的疏散星团，萨加尔和勘农测定它的年龄是30Myr（1997年）^[6]；赛纳等人的值是20 ± 5 百万年（2001年）^[7]；而皮斯库诺夫的值是6 Myr（2004年）^[8]。NGC 4103的金属量是低于太阳的(−0.47)^[9]。代表外部极限的星团潮汐半径，在NGC 4103的大小是12.1-15.9秒差距（39-51光年），在这个距离之外，星团核心的引力就不太可能维系住恒星^[4]。

成员[编辑]

在星团的角半径内可能有421颗恒星成员，其中的199颗在星团的中心部分^[3]。在星团中没有侦测到蓝掉队星^[10]。星团的恒星数量不多，以亮度中等的10等星和更暗的恒星为主^[7]。星团中表面温度最高的是光谱为B2的主序星^[11]。星团的成员中没有发现红巨星 ^[7]，其中一颗恒星成员是Be星 ^[7]^[12]。

南十字座AI是星团中的成员之一，这是一颗轨道周期1.41771天的短周期半接触联星。这对联星的轨道周期持续在增加，科学家用质量较小但较热的恒星，以强大的恒星风将伴随的质量转移给伴星来解释，并且估计已经有4.1太阳质量从热的恒星转移给质量较大的恒星^[13]。

参考资料[编辑]

^ ^1.0 ^1.1 ^1.2 [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4103
NGC 4103] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文资料中心. [2017-08-19].
^ ^2.0 ^2.1 WEBDA page for open cluster NGC 4103. [2018-09-17]. （原始内容存档于2017-12-01）.
^ ^3.0 ^3.1 Kharchenko, N. V.; Piskunov, A. E.; Schilbach, E.; Röser, S.; Scholz, R.-D. Global survey of star clusters in the Milky Way. Astronomy & Astrophysics. 3 October 2013, 558: A53 [2018-09-17]. Bibcode:2013A&A...558A..53K. arXiv:1308.5822 . doi:10.1051/0004-6361/201322302. （原始内容存档于2020-03-12）.
^ ^4.0 ^4.1 Piskunov, A. E.; Schilbach, E.; Kharchenko, N. V.; Röser, S.; Scholz, R.-D. Tidal radii and masses of open clusters. Astronomy & Astrophysics. 6 November 2007, 477 (1): 165–172 [2018-09-17]. Bibcode:2008A&A...477..165P. doi:10.1051/0004-6361:20078525. （原始内容存档于2020-03-12）.
^ Carraro, Giovanni; Turner, David G.; Majaess, Daniel J.; Baume, Gustavo L.; Gamen, Roberto; Lera, José A. Molina. Extinction in the Star Cluster SAI 113 and Galactic Structure in Carina. The Astronomical Journal. 13 March 2017, 153 (4): 156. Bibcode:2017AJ....153..156C. arXiv:1701.08319 . doi:10.3847/1538-3881/aa5c3a.
^ Sagar, R.; Cannon, R. D. Multicolour deep CCD photometric study of the moderately youngsouthern open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087. Astronomy and Astrophysics Supplement Series. 15 April 1997, 122 (1): 9–29. Bibcode:1997A&AS..122....9S. doi:10.1051/aas:1997293.
^ ^7.0 ^7.1 ^7.2 ^7.3 Sanner, J.; Brunzendorf, J.; Will, J.-M.; Geffert, M. Photometric and kinematic studies of open star clusters. Astronomy & Astrophysics. 15 April 2001, 369 (2): 511–526. Bibcode:2001A&A...369..511S. arXiv:astro-ph/0101541 . doi:10.1051/0004-6361:20010196.
^ Piskunov, A. E.; Belikov, A. N.; Kharchenko, N. V.; Sagar, R.; Subramaniam, A. On the determination of age and mass functions of stars in young open star clusters from the analysis of their luminosity functions. Monthly Notices of the Royal Astronomical Society. April 2004, 349 (4): 1449–1463. Bibcode:2004MNRAS.349.1449P. arXiv:astro-ph/0401587 . doi:10.1111/j.1365-2966.2004.07620.x.
^ Paunzen, E.; Heiter, U.; Netopil, M.; Soubiran, C. On the metallicity of open clusters. Astronomy and Astrophysics. 28 July 2010, 517: A32 [2018-09-17]. Bibcode:2010A&A...517A..32P. arXiv:1008.3476 . doi:10.1051/0004-6361/201014131. （原始内容存档于2018-07-19）.
^ Ahumada, J. A.; Lapasset, E. New catalogue of blue stragglers in open clusters. Astronomy & Astrophysics. 20 November 2006, 463 (2): 789–797 [2018-09-17]. Bibcode:2007A&A...463..789A. doi:10.1051/0004-6361:20054590. （原始内容存档于2020-12-27）.
^ Wesselink, A. J. Photometry of NGC 4103. Monthly Notices of the Royal Astronomical Society. 1 October 1969, 146 (3): 329–338. Bibcode:1969MNRAS.146..329W. doi:10.1093/mnras/146.3.329.
^ Paunzen, E.; Netopil, M.; Maitzen, H. M.; Pavlovski, K.; Schnell, A.; Zejda, M. Photoelectric search for peculiar stars in open clusters. Astronomy & Astrophysics. 3 April 2014, 564: A42. Bibcode:2014A&A...564A..42P. arXiv:1403.3538 . doi:10.1051/0004-6361/201423521.
^ Zhao, Er-Gang; Qian, Sheng-Bang; Lajús, E. Fernández; Essen, Carolina von; Zhu, Li-Ying. Mass transfer and loss of the massive semi-detached binary AI Crucis. Research in Astronomy and Astrophysics. May 2010, 10 (5): 438–444. Bibcode:2010RAA....10..438Z. doi:10.1088/1674-4527/10/5/004.

外部链接[编辑]

WikiSky上关于NGC 4103的内容：DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片

[simbad-1] 1.0 ^1.1 ^1.2 [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4103
NGC 4103] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文资料中心. [2017-08-19].

[webda-2] 2.0 ^2.1 WEBDA page for open cluster NGC 4103. [2018-09-17]. （原始内容存档于2017-12-01）.

[Kharchenko2013-3] 3.0 ^3.1 Kharchenko, N. V.; Piskunov, A. E.; Schilbach, E.; Röser, S.; Scholz, R.-D. Global survey of star clusters in the Milky Way. Astronomy & Astrophysics. 3 October 2013, 558: A53 [2018-09-17]. Bibcode:2013A&A...558A..53K. arXiv:1308.5822 . doi:10.1051/0004-6361/201322302. （原始内容存档于2020-03-12）.

[Piskunov2008-4] 4.0 ^4.1 Piskunov, A. E.; Schilbach, E.; Kharchenko, N. V.; Röser, S.; Scholz, R.-D. Tidal radii and masses of open clusters. Astronomy & Astrophysics. 6 November 2007, 477 (1): 165–172 [2018-09-17]. Bibcode:2008A&A...477..165P. doi:10.1051/0004-6361:20078525. （原始内容存档于2020-03-12）.

[5] Carraro, Giovanni; Turner, David G.; Majaess, Daniel J.; Baume, Gustavo L.; Gamen, Roberto; Lera, José A. Molina. Extinction in the Star Cluster SAI 113 and Galactic Structure in Carina. The Astronomical Journal. 13 March 2017, 153 (4): 156. Bibcode:2017AJ....153..156C. arXiv:1701.08319 . doi:10.3847/1538-3881/aa5c3a.

[6] Sagar, R.; Cannon, R. D. Multicolour deep CCD photometric study of the moderately youngsouthern open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087. Astronomy and Astrophysics Supplement Series. 15 April 1997, 122 (1): 9–29. Bibcode:1997A&AS..122....9S. doi:10.1051/aas:1997293.

[Sanner2001-7] 7.0 ^7.1 ^7.2 ^7.3 Sanner, J.; Brunzendorf, J.; Will, J.-M.; Geffert, M. Photometric and kinematic studies of open star clusters. Astronomy & Astrophysics. 15 April 2001, 369 (2): 511–526. Bibcode:2001A&A...369..511S. arXiv:astro-ph/0101541 . doi:10.1051/0004-6361:20010196.

[8] Piskunov, A. E.; Belikov, A. N.; Kharchenko, N. V.; Sagar, R.; Subramaniam, A. On the determination of age and mass functions of stars in young open star clusters from the analysis of their luminosity functions. Monthly Notices of the Royal Astronomical Society. April 2004, 349 (4): 1449–1463. Bibcode:2004MNRAS.349.1449P. arXiv:astro-ph/0401587 . doi:10.1111/j.1365-2966.2004.07620.x.

[9] Paunzen, E.; Heiter, U.; Netopil, M.; Soubiran, C. On the metallicity of open clusters. Astronomy and Astrophysics. 28 July 2010, 517: A32 [2018-09-17]. Bibcode:2010A&A...517A..32P. arXiv:1008.3476 . doi:10.1051/0004-6361/201014131. （原始内容存档于2018-07-19）.

[10] Ahumada, J. A.; Lapasset, E. New catalogue of blue stragglers in open clusters. Astronomy & Astrophysics. 20 November 2006, 463 (2): 789–797 [2018-09-17]. Bibcode:2007A&A...463..789A. doi:10.1051/0004-6361:20054590. （原始内容存档于2020-12-27）.

[11] Wesselink, A. J. Photometry of NGC 4103. Monthly Notices of the Royal Astronomical Society. 1 October 1969, 146 (3): 329–338. Bibcode:1969MNRAS.146..329W. doi:10.1093/mnras/146.3.329.

[12] Paunzen, E.; Netopil, M.; Maitzen, H. M.; Pavlovski, K.; Schnell, A.; Zejda, M. Photoelectric search for peculiar stars in open clusters. Astronomy & Astrophysics. 3 April 2014, 564: A42. Bibcode:2014A&A...564A..42P. arXiv:1403.3538 . doi:10.1051/0004-6361/201423521.

[13] Zhao, Er-Gang; Qian, Sheng-Bang; Lajús, E. Fernández; Essen, Carolina von; Zhu, Li-Ying. Mass transfer and loss of the massive semi-detached binary AI Crucis. Research in Astronomy and Astrophysics. May 2010, 10 (5): 438–444. Bibcode:2010RAA....10..438Z. doi:10.1088/1674-4527/10/5/004.

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