Astronomy:VVV CL001
| VVVCL001 | |
|---|---|
 A image from the Vista Variables in the Via Lactea (VVV) survey showing VVV CL001 located inconspicuously to the left while UKS 1 is on the right | |
| Observation data | |
| Constellation | Sagittarius |
| Right ascension | 17h 54m 37.17s |
| Declination | -24° 4' 51.34" |
| Distance | 26,800 ly (8.22 kpc) |
| Physical characteristics | |
| Estimated age | 11.9 gya |
| Notable features | One of the most metal poor globular clusters |
VVV CL001 is a globular cluster located around 8.22 kiloparsecs from Earth in the constellation of Sagittarius.[1] It is the most metal poor globular cluster discovered around the Milky Way. [2] It is an old globular cluster with an age of 11.9 billion years. VVV CL001 is likely an ancient relic that was left behind by a past galactic merger by a massive galaxy early in the evolution of the Milky Way galaxy.[2] It has a mass of 1.5x10^5 solar masses.[3]
It may be in a physical binary with another globular cluster known as UKS 1 however it is still being decided if they are an actual binary or have similar radial velocity.[4]
Discovery
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VVV CL001 was discovered by using the VISTA Variables in the Via Lactea (VVV) survey. It has several aims such as resolving the three-dimensional structure of the Milky Way galaxy by precisely measuring the distribution of RR Lyrae, Cepheids, and red clump stars.[5] Another aim of the VVV survey is to accurately measure the physical parameters of known globular clusters and search for new ones. It was this which discovered VVV CL001.[4]
References
- ↑ information@eso.org. "VISTA view of the newly discovered globular cluster VVV CL001 and its brighter companion" (in fr). https://www.eso.org/public/images/eso1141a/.
- ↑ 2.0 2.1 Fernández-Trincado, José G.; Minniti, Dante; Souza, Stefano O.; Beers, Timothy C.; Geisler, Doug; Bidin, Christian Moni; Villanova, Sandro; Majewski, Steven R. et al. (2021). "VVV CL001: Likely the Most Metal-poor Surviving Globular Cluster in the Inner Galaxy". The Astrophysical Journal Letters 908 (2): L42. doi:10.3847/2041-8213/abdf47. Bibcode: 2021ApJ...908L..42F.
- ↑ "VVV-CL001". https://people.smp.uq.edu.au/HolgerBaumgardt/globular/fits/vvvcl001.html.
- ↑ 4.0 4.1 Minniti, D.; Hempel, M.; Toledo, I.; Ivanov, V. D.; Alonso-García, J.; Saito, R. K.; Catelan, M.; Geisler, D. et al. (2011-03-01). "Discovery of VVV CL001 - A low-mass globular cluster next to UKS 1 in the direction of the Galactic bulge" (in en). Astronomy & Astrophysics 527: A81. doi:10.1051/0004-6361/201015795. ISSN 0004-6361. Bibcode: 2011A&A...527A..81M. https://www.aanda.org/articles/aa/abs/2011/03/aa15795-10/aa15795-10.html.
- ↑ Saito, R. K.; Hempel, M.; Alonso-García, J.; Lucas, P. W.; Minniti, D.; Alonso, S.; Baravalle, L.; Borissova, J. et al. (2024-09-01). "The VISTA Variables in the Vía Láctea extended (VVVX) ESO public survey: Completion of the observations and legacy" (in en). Astronomy & Astrophysics 689: A148. doi:10.1051/0004-6361/202450584. ISSN 0004-6361. Bibcode: 2024A&A...689A.148S. https://www.aanda.org/articles/aa/abs/2024/09/aa50584-24/aa50584-24.html.
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