Misplaced Pages

NGC 6535
Observation data (J2000 epoch)
Class	XI
Constellation	Serpens
Right ascension	18 03 50.51
Declination	−00° 17′ 51.5″
Distance	22 kly (6.8 kpc)
Apparent magnitude (V)	9.85
Physical characteristics
Mass	(2.21±0.78)×10 M☉
Metallicity	${\displaystyle {\begin{smallmatrix}\left\end{smallmatrix}}}$ = −1.95±0.04 dex
Estimated age	12.75 Gyr
Other designations	NGC 6535, C 1801-003, Glc 83
See also: Globular cluster, List of globular clusters

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. However, Wolfgang Steinicke has uncovered evidence that William Herschel's first discovery was actually NGC 6535, which he observed on 24 August 1780.

This is a halo globular cluster located close to the galactic bulge at a distance of 13 kly (3.9 kpc) from the Galactic Center. It has an estimated age of 12.75 billion years. For a object of its type, NGC 6535 has a relatively low mass of 2.2×10 times the mass of the Sun. The core radius is 2.3 ly (0.71 pc) and the tidal radius is 50 ly (15.3 pc). It has an unusually high mass-to-light ratio of 11.

The cluster is suspected to harbour an intermediate-mass black hole in its center. Unusually for a low-mass globular cluster, it has multiple generations of stars. Rather small and sparse for a globular cluster, this cluster contains no known RR Lyrae variables, which is unusual for a globular cluster. Nine blue stragglers have been discovered.

References

1. ^ Goldsbury, Ryan; et al. (December 2010). "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters". The Astronomical Journal. 140 (6): 1830–1837. arXiv:1008.2755. Bibcode:2010AJ....140.1830G. doi:10.1088/0004-6256/140/6/1830. S2CID 119183070.
2. ^ Askar, Abbas; et al. (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.
3. Dalessandro, Emanuele; et al. (November 2012). "Ultraviolet Properties of Galactic Globular Clusters with Galex. II. Integrated Colors". The Astronomical Journal. 144 (5): 13. arXiv:1208.5698. Bibcode:2012AJ....144..126D. doi:10.1088/0004-6256/144/5/126. S2CID 56419886. 126.
4. ^ Bragaglia, A.; et al. (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
5. "NGC 6535". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 May 2017.
6. Hille, Karl (24 February 2015). "Hubble Sees an Ancient Globular Cluster". NASA. Retrieved 10 March 2021.
7. Seligman, Courtney. "New General Catalog Objects: NGC 6500 - 6549". cseligman.com. Retrieved 10 March 2021.
8. "Photos". www.klima-luft.de. Retrieved 10 March 2021.
9. Testa, Vincenzo; et al. (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.
10. 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

• Media related to NGC 6535 at Wikimedia Commons
• "SEDS". Retrieved 15 May 2017.

v t e Constellation of Serpens
List of stars in Serpens Serpens in Chinese astronomy
Stars	Bayer α (Unukalhai) β (Chow) γ (Ainalhai) δ ε ζ η θ (Alya) ι κ (Gudja) λ μ ν ξ ο π ρ σ τ τ τ τ τ τ τ τ υ φ χ ψ ω Flamsteed 3 4 5 6 7 8 10 11 (A) 14 16 25 (A) 29 36 (b) 39 40 43 45 46 47 59 (d) 60 (c) 61 64 3 Her Variable R W X RT UZ VV VY WX AA AN AO AP AR AU BQ CT CV CW EG FH FI FK FL FQ FR LV LW LX MR MS MT MV MY NN NO NQ NW OO OU PS QV QX QY V382 V411 HR 5665 5690 5692 5706 5711 5740 5745 5783 5796 5831 5850 5859 5861 5874 5909 5913 5931 5992 6005 6011 6014 6016 6449 6496 6544 6562 6568 6600 6620 6666 6681 6755 6756 6757 6785 6830 6840 6843 6858 6890 6898 6928 6993 (e) 6999 7008 7048 7076 7144 HD 135061 135615 136027 136118 138085 142245 143436 145936 146740 157969 168112 168443 168746 (Alasia) 175541 (Kaveh) Other ADS 9544 AS 296 9 11 22 23 27 Gliese 701 Gliese 710 GJ 1224 GX 17+2 IRAS 18418-0440 MWC 297 MWC 922 PG 1510+234 PG 1605+072 PSR B1534+11 PSR J1719−1438 Ross 508 Serpens FIRS 1 Serpens SVS 20 Serpens X-1 W40 IRS 1A South
Exoplanets CoRoT-9b CoRoT-11b CoRoT-22b CoRoT-23b CoRoT-27b HD 168746 b (Onasilos) HD 175541 b (Kavian) ω Serpentis b
Star clusters	NGC NGC 6535 NGC 6539 NGC 6604 NGC 6605 Other IC 4756 Messier 5 Messier 16 Serpens OB2 Serpens South Palomar 5
Nebulae	Other Abell 41 Eagle Nebula L134 L183 L483 Serpens cloud Sh2-54 Westerhout 40 Red Square Nebula S68
Galaxies	NGC 5887 5910 5911 5913 5919 5920 5921 5926 5928 5931 5936 5937 5940 5942 5941 5944 5951 5953 5954 5952 5956 5955 5957 5960 5962 5964 5970 5972 5975 5977 5980 5983 5984 5988 5991 5990 5994 5996 5997 6003 6004 6008 6006 6007 6009 6012 6010 6014 6020 6017 6018 6021 6022 6023 6027 6027a 6027b 6027c 6027d 6027e 6029 6033 6037 6036 6051 6063 6065 6066 6070 6080 6100 6118 6172 Other 317 318 321 323.1 324 326 Arp 72 Arp 220 4C 11.50 CGCG 049-033 Hoag's Object IC 4537 IC 4588 IRAS 15107+0724 NRAO 530 PDS 456 PG 1553+113 PGC 54493 PKS 1546+027
Galaxy clusters Abell 2040 Abell 2052 Abell 2063 Abell 2107 AWM 4 MKW 3s Seyfert's Sextet
Astronomical events GRB 970111 GRB 050813 GRB 060418 GRB 060526 SN 2004dk
Category

• Globular clusters
• Serpens
• NGC objects
• Astronomical objects discovered in 1852