Astronomy:NGC 6269

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NGC 6269
SDSS image of NGC 6269
Observation data (J2000 epoch)
ConstellationHercules
Right ascension 16h 57m 58.10s[1]
Declination+27° 51′ 15.85″[1]
Redshift0.034801[1]
Helio radial velocity10,433 ± 13 km/s[1]
Distance509.1 ± 35.6 Mly (156.10 ± 10.93 Mpc)[1]
Group or clusterAWM 5
Apparent magnitude (V)12.4[2]
Characteristics
TypecD;E[1]
Size~233,000 ly (71.3 kpc) (estimated)[1]
Other designations
CGCG 169-019, UGC 10629, PGC 59332, MCG +05-40-012, GIN 626, NSA 147539, AWM 5:[L84] G1[1]

NGC 6269 is an elliptical galaxy located in the constellation of Hercules. The redshift of the galaxy is (z) 0.034[1] and it was first discovered by the German astronomer named Albert Marth in June 28, 1864, whom he described it as both small, round and also a faint object.[3] It is a Type-cD galaxy.[4]

Description

NGC 6269 is the central Type-cD galaxy and the brightest cluster galaxy (BCG) of a poor galaxy cluster called AWM 5.[5][6][7] It is categorized as a radio galaxy based on a radio morphology study published in 2007.[8] However, the source located in the central region is mainly weak with a pair of resolved radio lobes located from north to south directions, extending from the center by around 25 arcseconds. The radio flux densities of the lobes are estimated to be 8 and 10 mJy.[4] A further study has also shown most of the radio emission is mainly confined to a region located within the optical envelope. The central component has a misaligned radio axis based on imaging.[7]

The stellar population in NGC 6269 is estimated to be at 0.95 ± 0.08 billion years, based on a study of stellar populations located at the central regions of brightest cluster galaxies, conducted in 2009.[9] The active galactic nucleus (AGN) cavity is estimated to have a power of 0.02+0.01-0.01 x 1044 erg s-1.[10] The supermassive black hole at the center of the galaxy is classified as now dormant and it has a mass of around 109 Mʘ.[4] The total blue luminosity of the galaxy has been found to be around -23.63 magnitude.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NED Search results for NGC 6269". https://ned.ipac.caltech.edu/byname?objname=NGC+6269&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1. 
  2. ↑ "Revised NGC Data for NGC 6269". https://spider.seds.org/ngc/revngcic.cgi?NGC6269. 
  3. ↑ "New General Catalog Objects: NGC 6250 - 6299". https://cseligman.com/text/atlas/ngc62a.htm#6269. 
  4. ↑ 4.0 4.1 4.2 Baldi, A.; Forman, W.; Jones, C.; Nulsen, P.; David, L.; Kraft, R.; Simionescu, A. (March 2009). "Chandra Observations of the Galaxy Group AWM 5: Cool Core Reheating and Thermal Conduction Suppression" (in en). The Astrophysical Journal 694 (1): 479–491. doi:10.1088/0004-637X/694/1/479. ISSN 0004-637X. https://arxiv.org/pdf/0811.3654. 
  5. ↑ Dahlem, M.; Thiering, I. (February 2000). "Diffuse X-Ray Emission in Three Poor Clusters of Galaxies" (in en). Publications of the Astronomical Society of the Pacific 112 (768): 148–162. doi:10.1086/316511. ISSN 0004-6280. https://iopscience.iop.org/article/10.1086/316511/pdf. 
  6. ↑ O'Sullivan, Ewan; Ponman, Trevor J.; Collins, Ross S. (April 2003). "X-ray scaling properties of early-type galaxies" (in en). Monthly Notices of the Royal Astronomical Society 340 (4): 1375–1399. doi:10.1046/j.1365-8711.2003.06396.x. ISSN 0035-8711. https://arxiv.org/pdf/astro-ph/0301153. 
  7. ↑ 7.0 7.1 Giacintucci, Simona; O'Sullivan, Ewan; Vrtilek, Jan; David, Laurence P.; Raychaudhury, Somak; Venturi, Tiziana; Athreya, Ramana M.; Clarke, Tracy E. et al. (2011-04-21). "A COMBINED LOW-RADIO FREQUENCY/X-RAY STUDY OF GALAXY GROUPS. I. GIANT METREWAVE RADIO TELESCOPE OBSERVATIONS AT 235 MHz AND 610 MHz". The Astrophysical Journal 732 (2): 95. doi:10.1088/0004-637x/732/2/95. ISSN 0004-637X. https://iopscience.iop.org/article/10.1088/0004-637X/732/2/95. 
  8. ↑ Giacintucci, S.; Venturi, T.; Murgia, M.; Dallacasa, D.; Athreya, R.; Bardelli, S.; Mazzotta, P.; Saikia, D. J. (2007-08-31), Radio morphology and spectral analysis of cD galaxies in rich and poor galaxy clusters, arXiv, doi:10.48550/arXiv.0708.4330, arXiv:0708.4330, http://arxiv.org/abs/0708.4330, retrieved 2026-04-01 
  9. ↑ Loubser, S. I.; Sánchez-Blázquez, P.; Sansom, A. E.; Soechting, I. K. (September 2009). "Stellar populations in the centres of brightest cluster galaxies" (in en). Monthly Notices of the Royal Astronomical Society 398 (1): 133–156. doi:10.1111/j.1365-2966.2009.15171.x. ISSN 0035-8711. https://arxiv.org/pdf/0906.0287. 
  10. ↑ McDonald, Michael; McNamara, Brian R.; Calzadilla, Michael S.; Chen, Chien-Ting; Gaspari, Massimo; Hickox, Ryan C.; Kara, Erin; Korchagin, Ilia (2021-02-01). "Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies". The Astrophysical Journal 908 (1): 85. doi:10.3847/1538-4357/abd47f. ISSN 0004-637X. https://iopscience.iop.org/article/10.3847/1538-4357/abd47f. 
  11. ↑ Peletier, Reynier F.; Davies, Roger L.; Illingworth, Garth D.; Davis, Lindsey E.; Cawson, Michael (October 1990). "CCD Surface Photometry of Galaxies with Dynamical Data. II. UBR Photometry of 39 Elliptical Galaxies" (in en). The Astronomical Journal 100: 1091. doi:10.1086/115582. ISSN 0004-6256. https://articles.adsabs.harvard.edu/pdf/1990AJ....100.1091P. 



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