Terzan 2
| Terzan 2 | |
|---|---|
 Terzan 2 imaged by the Hubble Space Telescope | |
| Observation data | |
| Constellation | Scorpius |
| Right ascension | 17h 27m 33.24s[1] |
| Declination | −30° 48′ 7.8″[1] |
| Apparent magnitude (V) | 14.29 |
| Apparent dimensions (V) | 0.6′ |
| Physical characteristics | |
| Radius | 100-200[2] |
| Metallicity | [Fe/H] = [Fe/H]= −0.84 ± 0.04[3] dex |
| Other designations | Terzan 2, Haute-Provence 3, ESO 454-29, VDBH 228, GCl 64.1[1] |
Terzan 2 (also known as ESO 454-29) is a heavily obscured globular cluster located in the constellation of Scorpius.[4] It was discovered by the French astronomer Agop Terzan in the 1967.[5]
Terzan 2 is a metal-rich globular cluster located in the Milky Way's galactic bulge. The orbit of the cluster is chaotic.[3] 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.[3] Low mass X-ray binary 4U 1724-307 is also located in Terzan 2.[6]
See also
[edit]References
[edit]- 1 2 3 "Terzan 2". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-07-01.
- ↑ de Lazaro, Enrico (July 11, 2022). "Hubble Space Telescope Captures Image of Terzan 2". Scinews.
- 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].
- ↑ "Hubble Snaps a Portrait of a Globular Cluster - NASA Science". 2022-07-15. Retrieved 2026-07-01.
- ↑ 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.
- ↑ 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.
| Location | Milky Way → Milky Way subgroup → Local Group → Local Sheet → Local Volume → Virgo Supercluster → Laniakea Supercluster → Pisces–Cetus Supercluster Complex → Local Hole → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". | _ESA512394_-_slider.jpg) | |||||
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