NGC 2787




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NGC 2787

NGC 2787.jpg

哈勃太空望远镜拍摄的NGC 2787
Credit: HST/STScI/AURA.

觀測資料 (J2000 曆元)
星座
大熊座
赤經
09h 19m 18.5s[1]
赤緯
+69° 12′ 12″[1]
紅移
696 ± 8 km/s[1]
距離
24 ± 4 Mly (7.5 ± 1.2 Mpc)[2]
類型
SB(r)0+[1]

視大小 (V)

3′.2 × 2′.0[1]

視星等 (V)

11.8[1]
值得注意的特徵
barred galaxy
其他名稱

UGC 4914,[1]PGC 26341[1]

參見:星系、星系列表

NGC 2787是一个位于大熊座的棒透镜星系,距离地球大约2400万光年。1999年,哈勃太空望远镜对NGC 2787进行了观测。



LINER谱线


NGC 2787包含一个低电离核区(LINER),这是一种弱电离原子的特征谱线类型[3]。LINER在透镜星系中非常常见,大约五分之一的相邻透镜星系都包含LINER[4]



参考资料





  1. ^ 1.01.11.21.31.41.51.61.7 NASA/IPAC Extragalactic Database. Results for NGC 2787. [2006-12-13]. 


  2. ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore. The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances. Astrophysical Journal. 2001, 546 (2): 681–693. Bibcode:2001ApJ...546..681T. arXiv:astro-ph/0011223. doi:10.1086/318301. 


  3. ^ L. C. Ho, A. V. Filippenko, W. L. W. Sargent. A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies. Astrophysical Journal Supplement. 1997, 112 (2): 315–390. Bibcode:1997ApJS..112..315H. arXiv:astro-ph/9704107. doi:10.1086/313041. 


  4. ^ L. C. Ho, A. V. Filippenko, W. L. W. Sargent. A Search for "Dwarf" Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies. Astrophysical Journal. 1997, 487 (2): 568–578. Bibcode:1997ApJ...487..568H. arXiv:astro-ph/9704108. doi:10.1086/304638. 




外部链接



  • A Galaxy That's All Wound Up

  • NGC 2787 at ESA/Hubble




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