Arp-Madore_1

Arp-Madore 1

Arp-Madore 1

Globular cluster in the constellation Horologium

Arp-Madore 1 is a globular cluster visible in the constellation Horologium, located 123.3 kiloparsecs (402,000 light-years) away from Earth.[2] It is one of the most distant known globular clusters of the Milky Way galaxy's halo;[3][4] its distance gives it interest as a test case for gravitational theories.[5] It is named after Halton Arp and Barry F. Madore, who identified it as a distant globular cluster in 1979, using the UK Schmidt Telescope,[6] after previous researchers at the European Southern Observatory had observed its existence but not its classification.[7]

Quick Facts Observation data (J2000.0 epoch), Constellation ...

References

  1. [1]
    "NAME E 1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 January 2014.
  2. [2]
    Vasiliev, Eugene (2019). "Proper motions and dynamics of the Milky Way globular cluster system from Gaia DR2". Monthly Notices of the Royal Astronomical Society. 484 (2): 2832–2850. arXiv:1807.09775. Bibcode:2019MNRAS.484.2832V. doi:10.1093/mnras/stz171.
  3. [3]
    Aaronson, M.; Schommer, R. A.; Olszewski, E. W. (1984), "AM-1 : a very distant globular cluster", Astrophys. J., 276: 221–228, Bibcode:1984ApJ...276..221A, doi:10.1086/161605.
  4. [4]
    Dotter, A.; Sarjedini, A.; Yang, S.-C. (2008), "Globular clusters in the outer galactic halo: AM-1 and Palomar 14", Astron. J., 136 (4): 1407–1414, arXiv:0807.1103, Bibcode:2008AJ....136.1407D, doi:10.1088/0004-6256/136/4/1407, S2CID 119153331.
  5. [5]
    Hilker, M. (2006), "Probable member stars of the gravitational theory-testing globular clusters AM 1, Pal 3 and Pal 14", Astron. Astrophys., 448 (1): 171–180, arXiv:astro-ph/0510679, Bibcode:2006A&A...448..171H, doi:10.1051/0004-6361:20054327, S2CID 15832632.
  6. [6]
    Madore, B. F.; Arp, H. C. (1979), "Three new faint star clusters", Astrophys. J., 227: L103–L104, Bibcode:1979ApJ...227L.103M, doi:10.1086/182876.
  7. [7]
    Holmberg, E. B.; Lauberts, A.; Schuster, H. E.; West, R. M. (1975), "The ESO/Uppsala survey of the ESO (B) atlas of the southern sky. III", Astron. Astrophys., Suppl.Ser., 22: 327–402, Bibcode:1975A&AS...22..327H.
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