NGC 2787
NGC 2787 | |
---|---|
观测资料(J2000 曆元) | |
星座 | 大熊座 |
赤经 | 09h 19m 18.5s[1] |
赤纬 | +69° 12′ 12″[1] |
紅移 | 696 ± 8 km/s[1] |
距离 | 24 ± 4 Mly (7.5 ± 1.2 Mpc)[2] |
视星等 (V) | 11.8[1] |
特征 | |
类型 | SB(r)0+[1] |
角直徑 (V) | 3′.2 × 2′.0[1] |
其他 | barred galaxy |
其他名称 | |
UGC 4914,[1] PGC 26341[1] | |
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
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 NASA/IPAC Extragalactic Database. Results for NGC 2787. [2006-12-13]. (原始内容存档于2011-05-14).
- ^ 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.
- ^ 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.
- ^ 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.