Terzan 2

Terzan 2
Terzan 2 imaged by the Hubble Space Telescope
Observation data
ConstellationScorpius
Right ascension17h 27m 33.24s
Declination−30° 48′ 7.8″
Apparent magnitude (V)14.29
Apparent dimensions (V)0.6′
Physical characteristics
Radius100-200
Metallicity[Fe/H] = [Fe/H]= −0.84 ± 0.04 dex
Other designationsTerzan 2, Haute-Provence 3, ESO 454-29, VDBH 228, GCl 64.1
See also: Globular cluster, List of globular clusters

Terzan 2 (also known as ESO 454-29) is a heavily obscured globular cluster located in the constellation of Scorpius. It was discovered by the French astronomer Agop Terzan in the 1967.

Terzan 2 is a metal-rich globular cluster located in the Milky Way's galactic bulge. The orbit of the cluster is chaotic. Each pass through the galactic bar, it is disrupted and sent in a slightly different path, meaning it never has a clear enough path to create a stable orbit. The structure of the cluster is itself chaotic, with both retrograde and prograde motion observed in the movement of its stars. Low mass X-ray binary 4U 1724-307 is also located in Terzan 2.

See also

References

  1. 1 2 3 "Terzan 2". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-07-01.
  2. ↑ de Lazaro, Enrico (July 11, 2022). "Hubble Space Telescope Captures Image of Terzan 2". Scinews.
  3. 1 2 3 Uribe, Macarena; Villanova, Sandro; Geisler, Daniel; Fernández-Trincado, José G.; Muñoz, Cesar; Barrera, Nicolás; Pino, Thaiz; Sepúlveda, Franco (September 2, 2025). "CAPOS: the bulge Cluster APOgee Survey IX. Spectroscopic Analysis of the Bulge Globular Cluster Terzan 2". arXiv:2509.02385 [astro-ph.GA].
  4. ↑ "Hubble Snaps a Portrait of a Globular Cluster - NASA Science". 2022-07-15. Retrieved 2026-07-01.
  5. ↑ Terzan, A. (1967). "A new globular cluster in the central region of the Galaxy". Comptes Rendus de l'Académie des Sciences, Série B (in French). 265: 734–736. Bibcode:1967CRASB.265..734T. Retrieved 2024-07-17.
  6. ↑ Emelyanov, A. N.; Revnivtsev, M. G.; Aref'ev, V. A.; Sunyaev, R. A. (2002). "A ten-year-long peak of the X-ray flux from the burster 4U 1724-307 in the globular cluster Terzan 2: Evolution of the donor star or the influence of a third star?". Astronomy Letters. 28 (1): 12–18. doi:10.1134/1.1434447. ISSN 1063-7737.