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梅奥尔II

马亚尔II
哈伯太空望远镜拍摄的马亚尔II影像,色彩是由1994年7月分别以可见光和近红外光拍摄的影像合成。
创建者:Michael Rich, Kenneth Mighell、James D. Neill(哥伦比亚大学)、Wendy Freedman(卡内基天文台)、和NASA
观测数据(J2000 历元)
星座仙女座
赤经00h 32m 46.51s[1]
赤纬+39° 34′ 39.7″[1]
距离2.52 ± 0.14 Mly (770 ± 40 kpc)
视星等 (V)+13.8[1]
物理性质
Mass1×107[2] M (2×1037 kg)
半径21.2 ± 1.0 ly(6.5 ± 0.3 pc)(半光度半径rh[3]
估计年龄~ 12 Gyr [2]
其它名称SKHB 1, HBK 0-1[1]

梅奥尔IIM31G1),也称为NGC-224-G1SKHB 1GSC 2788:2139HBK 0-1M31GC J003247+393440仙女的星团,是一个绕着M31,也就是仙女座星系球状星团

它的位置在距离仙女座星系核心130,000光年(40Kpc)[3],并且是本星系群绝对星等最亮[3]的球状星团,视星等为13.7等。G 1的质量被认为是半人马座ω的两倍,并且在核心可能有中等质量的黑洞(∼ 2×104 M[3]

它是由尼古拉斯梅奥尔(Nicholas Mayall)和O.J. Eggen在1953年首度从帕洛马山天文台48吋施密特望远镜在1948年拍摄的干版上检出的。

由于恒星金属量的分布很广,包含了数个世代的恒星和许多的恒星创生时期,显示经历了数个世代的恒星创生,所以许多人认为他不是个真正的球状星团,而是被仙女座星系吞噬的矮星系残留下的星系核心残骸[3][4]

名称的来源

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  • 1991年,梅奥尔II因约翰·修兹劳、J.P. Brodie、S.M. Kent被称为HBK 0-1.
  • 1953年,尼古拉斯·U·梅奥尔和O.J. Eggen发现梅奥尔II。
  • 1977年,梅奥尔II因华莱士·萨金特、C.T. Kowal、F.D.A. Hartwick和Sidney van den Bergh被称为SKHB 1,也称之为G1。

相关条目

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  • M54
  • 半人马座ω
  • 梅奥尔III(M31 G2、G2、HBK 0-2、SKHB 2、M31GC J003334+393119)
  • 梅奥尔IV(HBK 358-219、SKHB 219、Bol 358、M31GC J004318+394914)
  • 梅奥尔V(HBK 407-352、SKHB 352、Bol 407、M31GC J005010+414101)
  • 梅奥尔VI(HBK 0-327、SKHB 327、BA 3-29、M31GC J004650+424445)
  • 梅奥尔的天体(阿普148或APG 148、VV32)

参考资料

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  1. ^ 1.0 1.1 1.2 1.3 SIMBAD Astronomical Database. Results for Mayall II. [2009-09-13]. (原始内容存档于2019-05-30). 页面存档备份,存于互联网档案馆
  2. ^ 2.0 2.1 Ma, Jun; de Grijs, Richard; Fan, Zhou; Rey, Soo-Chang; Wu, Zhen-Yu; Zhou, Xu; Wu, Jiang-Hua; Jiang, Zhao-Ji; Chen, Jian-Sheng; Lee, Kyungsook; Sohn, Sangmo Tony. RESEARCH PAPER: Old stellar population synthesis: new age and mass estimates for Mayall II = G1. Research in Astronomy and Astrophysics. June 2009, 9 (6): 641–652. Bibcode:2009RAA.....9..641M. arXiv:0904.0674可免费查阅. doi:10.1088/1674-4527/9/6/003. 
  3. ^ 3.0 3.1 3.2 3.3 3.4 Ma, J.; de Grijs, R.; Chen, D.; van den Bergh, S.; Fan, Z.; Wu, Z.; Wu, H.; Zhou, X.; Wu, J.; Jiang, Z.; Chen, J. Structural parameters of Mayall II = G1 in M31. Monthly Notices of the Royal Astronomical Society. April 2007, 376 (4): 1621–1629. Bibcode:2007MNRAS.376.1621M. arXiv:astro-ph/0702012可免费查阅. doi:10.1111/j.1365-2966.2007.11573.x. 
  4. ^ Meylan, G.; Sarajedini, A.; Jablonka, P.; Djorgovski, S. G.; Bridges, T.; Rich, R. M. Mayall II=G1 in M31: Giant Globular Cluster or Core of a Dwarf Elliptical Galaxy?. The Astronomical Journal. August 2001, 122 (2): 830–841. Bibcode:2001AJ....122..830M. arXiv:astro-ph/0105013可免费查阅. doi:10.1086/321166. 

外部链接

[编辑]

Template:Andromeda Galaxy

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梅奥尔II
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