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NGC 6535 
Summary
NGC 6535 is a globular cluster of stars located at a distance of 22,200 light years from Earth in the equatorial constellation of Serpens, and is listed in the New General Catalogue. Its discovery is usually attributed to astronomer John Russell Hind in 1852,[4][5] however Wolfgang Steinicke has uncovered evidence that William Herschel's first discovery was actually NGC 6535, which he observed on 24 August 1780.[6]
| NGC 6535 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Serpens |
| Right ascension | 18h 3m 50.51s[1] |
| Declination | −0° 17′ 51.5″[1] |
| Distance | 22 kly (6.7 kpc)[2] |
| Apparent magnitude (V) | 9.3 |
| Physical characteristics | |
| Metallicity | = -1.95±0.04[3] dex |
| Other designations | C 1801-003, GCl 83, [KPS2012] MWSC 2795[1] |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
The cluster is suspected to harbour an intermediate-mass black hole in its center[7] and, unusually for a low-mass globular cluster, has had multiple generations of stars.[3] Rather small and sparse for a globular cluster,[8] this cluster contains no known RR Lyrae variables, which is unusual for a globular cluster.[9]
References edit
- ^ a b c "NGC 6535". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 May 2017.
- ^ "SEDS". Retrieved 15 May 2017.
- ^ a b Bragaglia, A.; Carretta, E.; d'Orazi, V.; Sollima, A.; Donati, P.; Gratton, R. G.; Lucatello, S. (2017), "NGC 6535: The lowest mass Milky Way globular cluster with a Na-O anti-correlation?", Astronomy & Astrophysics, 607: A44, arXiv:1708.07705, doi:10.1051/0004-6361/201731526, S2CID 119235401
- ^ Hille, Karl (24 February 2015). "Hubble Sees an Ancient Globular Cluster". NASA. Retrieved 10 March 2021.
- ^ "New General Catalog Objects: NGC 6500 - 6549". cseligman.com. Retrieved 10 March 2021.
- ^ "Photos". www.klima-luft.de. Retrieved 10 March 2021.
- ^ Askar, Abbas; Bianchini, Paolo; De Vita, Ruggero; Giersz, Mirek; Hypki, Arkadiusz; Kamann, Sebastian (2016), "MOCCA-SURVEY Database I: Is NGC 6535 a dark star cluster harbouring an IMBH?", Monthly Notices of the Royal Astronomical Society, 464 (3): 3090–3100, arXiv:1607.08275, doi:10.1093/mnras/stw2573
- ^ Testa, Vincenzo; Corsi, Carlo E.; Andreuzzi, Gloria; Iannicola, Giacinto; Marconi, Gianni; Piersimoni, Anna Marina; Buonanno, Roberto (2001). "Horizontal-Branch Morphology and Dense Environments: Hubble Space Telescope Observations of Globular Clusters NGC 2298, 5897, 6535, and 6626". The Astronomical Journal. 121 (2): 916–934. Bibcode:2001AJ....121..916T. doi:10.1086/318752. S2CID 118936939.
- ^ Sarajedini, Ata (1994). "CCD Photometry of the Galactic globular cluster NGC 6535 in the B and V Passbands". Publications of the Astronomical Society of the Pacific. 106: 404. Bibcode:1994PASP..106..404S. doi:10.1086/133392.
External links edit
Media related to NGC 6535 at Wikimedia Commons
