Tham khảo Vật_thể_Hoag

  1. 1 2 3 4 5 6 7 “NED results for Hoag's Object”. NASA/IPAC Extragalactic Database. Truy cập ngày 28 tháng 6 năm 2016.
  2. 1 2 3 4 R. W. O'Connell; J. D. Scargle; W. L. W. Sargent (1974). “The Nature of Hoag's Object”. Astrophysical Journal. 191: 61–62. Bibcode:1974ApJ...191...61O. doi:10.1086/152940.
  3. ↑ Buta, Ronald J. (2017). “Galactic rings revisited - I. CVRHS classifications of 3962 ringed galaxies from the Galaxy Zoo 2 Database”. Monthly Notices of the Royal Astronomical Society. 471 (4): 4027. arXiv:1707.06589. Bibcode:2017MNRAS.471.4027B. doi:10.1093/mnras/stx1829.
  4. ↑ A. A. Hoag (1950). “A peculiar object in Serpens”. Astronomical Journal. 55: 170. Bibcode:1950AJ.....55Q.170H. doi:10.1086/106427.
  5. ↑ “SkyServer Object Explorer – SDSS J151713.93+213516.8”.
  6. 1 2 3 F. Schweizer; W.K. Ford Jr.; R. Jederzejewski; R. Giovanelli (1987). “The structure and evolution of Hoag's object”. Astrophysical Journal. 320: 454–463. Bibcode:1987ApJ...320..454S. doi:10.1086/165562.
  7. ↑ N. Brosch; I. Finkelman; T. Oosterloo; G. Jozsa; A. Moiseev (2013). “HI in HO: Hoag's Object revisited”. Monthly Notices of the Royal Astronomical Society. 435 (1): 199–206. arXiv:1307.6368. Bibcode:2013MNRAS.435..475B. doi:10.1093/mnras/stt1348.