Astronomy:NGC 6535
From HandWiki
Short description: Globular cluster in the constellation Serpens
| NGC 6535 | |
|---|---|
| File:Potw1452a.tif | |
| 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 | [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = -1.95±0.04[3] dex |
| Other designations | C 1801-003, GCl 83, [KPS2012] MWSC 2795[1] |
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 24th August 1780.[6]
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
- ↑ 1.0 1.1 1.2 "NGC 6535". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6535.
- ↑ "SEDS". http://spider.seds.org/spider/MWGC/n6535.html.
- ↑ 3.0 3.1 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, doi:10.1051/0004-6361/201731526
- ↑ Hille, Karl (2015-02-24). "Hubble Sees an Ancient Globular Cluster". http://www.nasa.gov/content/goddard/hubble-sees-an-ancient-globular-cluster.
- ↑ "New General Catalog Objects: NGC 6500 - 6549". https://cseligman.com/text/atlas/ngc65.htm#6535.
- ↑ "Photos". http://www.klima-luft.de/steinicke/ngcic/persons/herschel_w.htm.
- ↑ 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, 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. doi:10.1086/318752. Bibcode: 2001AJ....121..916T.
- ↑ 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. doi:10.1086/133392. Bibcode: 1994PASP..106..404S.
External links
 |  |
