NGC 4103

NGC 4103
NGC 4103
觀測數據 (J2000 曆元)
星座	南十字座
赤經	12h 00m 39s
赤緯	-61° 55′ 00″
距離	5,320 光年 (1,632 秒差距)
視星等 (V)	7.4
視直徑 (V)	12'
物理性質
質量	1,180 M☉
估計年齡	25 million years
其他名稱（標示）	柯林德（英語：Collinder catalog） 252、Melotte 109
	相關條目：疏散星團、疏散星團列表

NGC 4103是詹姆士·敦洛普於1826年在南十字座發現的一個疏散星團，它位於銀河系的船底-人馬臂，距離我們大約5,000光年 ^[5]。

性質

NGC 4103是一個年輕的疏散星團，薩加爾和勘農測定它的年齡是30Myr（1997年）^[6]；賽納等人的值是20 ± 5 百萬年（2001年）^[7]；而皮斯庫諾夫的值是6 Myr（2004年）^[8]。NGC 4103的金屬量是低於太陽的(−0.47)^[9]。代表外部極限的星團潮汐半徑，在NGC 4103的大小是12.1-15.9秒差距（39-51光年），在這個距離之外，星團核心的引力就不太可能維繫住恆星^[4]。

成員

在星團的角半徑內可能有421顆恆星成員，其中的199顆在星團的中心部分^[3]。在星團中沒有偵測到藍掉隊星^[10]。星團的恆星數量不多，以亮度中等的10等星和更暗的恆星為主^[7]。星團中表面溫度最高的是光譜為B2的主序星^[11]。星團的成員中沒有發現紅巨星 ^[7]，其中一顆恆星成員是Be星 ^[7]^[12]。

南十字座AI是星團中的成員之一，這是一顆軌道週期1.41771天的短周期半接觸聯星。這對聯星的軌道週期持續在增加，科學家用質量較小但較熱的恆星，以強大的恆星風將伴隨的質量轉移給伴星來解釋，並且估計已經有4.1太陽質量從熱的恆星轉移給質量較大的恆星^[13]。

參考資料

^ ^1.0 ^1.1 ^1.2 NGC 4103. SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-19].
^ ^2.0 ^2.1 WEBDA page for open cluster NGC 4103. [2018-09-17]. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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.

外部連結

WikiSky上關於NGC 4103的內容：DSS2, SDSS, GALEX, IRAS, 氫α, X射線, 天文照片, 天圖, 文章和圖片

[simbad-1] 1.0 ^1.1 ^1.2 NGC 4103. SIMBAD. 斯特拉斯堡天文資料中心. [2017-08-19].

[webda-2] 2.0 ^2.1 WEBDA page for open cluster NGC 4103. [2018-09-17]. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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. （原始內容存檔於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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