NGC 449 is a spiral galaxy of type (R')S? located in the constellation Pisces. It was discovered on November 11, 1881 by Édouard Stephan. It was described by Dreyer as "very faint, very small, round, very little brighter middle, very faint star involved."[2]

NGC 449 is an active galaxy, specifically a Seyfert galaxy.[3] The supermassive black hole at the center of NGC 449 is 1.32×107 M☉, and matter from its accretion disk is currently accreting at a rate of 2.54×10−2 M☉ per year.[3]

NGC 447, NGC 449, NGC 451, and NGC 453 (SDSS)

References

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 0449. Retrieved September 2, 2016.
  2. ^ "New General Catalog Objects: NGC 400–449". Cseligman. Retrieved April 23, 2017.
  3. ^ a b Guo, Xiaotong; Gu, Qiusheng; Xu, Jun; Fang, Guanwen; Ge, Xue; Chen, Yongyun; Yu, Xiaoling; Ding, Nan (2023). "Multiwavelength Analysis of a Nearby Heavily Obscured AGN in NGC 449". Publications of the Astronomical Society of the Pacific. 135 (1043): 014102. arXiv:2301.05398. Bibcode:2023PASP..135a4102G. doi:10.1088/1538-3873/acb294.
  • Media related to NGC 449 at Wikimedia Commons
Allikas: http://en.wikipedia.org/wiki/NGC_449
No tags for this post.