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Abell 2244 BCG

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Abell 2244 BCG
SDSS image of Abell 2244 BCG.
Observation data (J2000.0 epoch)
ConstellationHercules
Right ascension17h 02m 42.50s[1]
Declination+34° 03′ 36.65″[1]
Redshift0.099298[1]
Heliocentric radial velocity29,769 ± 11 km/s[1]
Distance1,449.6 ± 101.5 Mly (444.45 ± 31.11 Mpc)[1]
Group or clusterAbell 2244
magnitude (J)12.72[1]
magnitude (H)11.38[1]
Characteristics
TypeBrClG[1]
Size~687,000 ly (210.5 kpc) (estimated)[1]
Other designations
2MASX J17024247+3403363, Abell 2244:[ZAC2011] BCG, MaNGA 08613-12705, LEDA 140689, NVSS J170242+340336, WHL J170242.5+340335 BCG,[1] LEDA 2043207

Abell 2244 BCG (short for Abell 2244 Brightest Cluster Galaxy) is a massive elliptical galaxy of Type-cD[2] located in the constellation of Hercules. The redshift of the galaxy is (z) 0.099[1] and it was first discovered from a CCD photometry study by astronomers in January 1983.[3] It is the brightest cluster galaxy of the galaxy cluster Abell 2244, with it being offset by 69 kiloparsecs from the X-ray peak.[4]

Description

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Abell 2244 BCG is a Type-cD or a central dominant galaxy of Abell 2244 with the size being much bigger compared to other galaxy members in the cluster.[5] The K-band magnitude is estimated to be -26.97 ± 0.09 and the U-R color gradient is -0.05 ± 0.10 magnitude.[6] The total stellar mass of the galaxy is 0.62 × 1012 Mʘ.[7]

Radio mapping at six centimeters by Very Large Array (VLA) has found the central radio source is mostly unresolved with a radio power of 21.96 W/Hz.[8] The source's radio luminosity when observed with VLA in 1994, is calculated to be 21.82 W Hz-1.[9] The radio core is found resolved at 10 GHz frequencies with a total flux density of 0.6 mJy and has a steep index of 1.29 ± 0.30.[10] A study published in 2004, has also found the active galactic nucleus (AGN) of the cD galaxy does not exhibit any signs of recent activity.[11] The hydrogen-alpha emission line luminosity is 0.333 × 1040 erg s-1.[12]

Evidence also found the cD galaxy has an offset nucleus or a companion object in its envelope. When observed, it is found located 2.5 arcseconds towards the direction of south, with the galaxy's isophotes depicted as having an elliptical appearance closer towards the center. The peak surface brightness of cD galaxy has been estimated to be 20.5 magnitude per arcsecond while the surface brightness of the companion is 19.8. This companion is suggested to be merging together with the cD galaxy, with its velocity towards it only being 50 kilometers per seconds.[2]

References

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  1. ^ a b c d e f g h i j k "NED Search results for Abell 2244 BCG". NASA/IPAC Extragalactic Database. Retrieved 2026-04-27.
  2. ^ a b Schombert, James M.; West, Michael J.; Zucker, Joshua R.; Struble, Mitchell F. (December 1989). "The Binary-Rich Cluster Abell 2244". The Astronomical Journal. 98: 1999. Bibcode:1989AJ.....98.1999S. doi:10.1086/115274. ISSN 0004-6256.
  3. ^ Schneider, D. P.; Gunn, J. E.; Hoessel, J. G. (January 1983). "CCD photometry of Abell clusters. I. Magnitudes and redshifts for 84 brightest cluster galaxies". The Astrophysical Journal. 264: 337–355. Bibcode:1983ApJ...264..337S. doi:10.1086/160602. ISSN 0004-637X.
  4. ^ Patel, Parimal; Maddox, S.; Pearce, Frazer R.; Aragon-Salamanca, A.; Conway, E. (2006-07-20). "An imaging survey of a uniform sample of brightest cluster galaxies and intracluster light". Monthly Notices of the Royal Astronomical Society. 370 (2): 851–883. arXiv:astro-ph/0607474. Bibcode:2006MNRAS.370..851P. doi:10.1111/j.1365-2966.2006.10510.x.
  5. ^ Gu, Liyi; Xu, Haiguang; Gu, Junhua; Wang, Yu; Zhang, Zhongli; Wang, Jingying; Qin, Zhenzhen; Cui, Haijuan; Wu, Xiang-Ping (August 2009). "A Chandra Study of Temperature Substructures in Intermediate-Redshift Galaxy Clusters". The Astrophysical Journal. 700 (2): 1161–1172. arXiv:0905.3933. Bibcode:2009ApJ...700.1161G. doi:10.1088/0004-637X/700/2/1161. ISSN 0004-637X.
  6. ^ Rafferty, D. A.; McNamara, B. R.; Nulsen, P. E. J. (November 2008). "The Regulation of Cooling and Star Formation in Luminous Galaxies by Active Galactic Nucleus Feedback and the Cooling-Time/Entropy Threshold for the Onset of Star Formation". The Astrophysical Journal. 687 (2): 899–918. arXiv:0802.1864. Bibcode:2008ApJ...687..899R. doi:10.1086/591240. ISSN 0004-637X.
  7. ^ Lidman, C.; Suherli, J.; Muzzin, A.; Wilson, G.; Demarco, R.; Brough, S.; Rettura, A.; Cox, J.; DeGroot, A.; Yee, H. K. C.; Gilbank, D.; Hoekstra, H.; Balogh, M.; Ellingson, E.; Hicks, A. (November 2012). "Evidence for significant growth in the stellar mass of brightest cluster galaxies over the past 10 billion years" (PDF). Monthly Notices of the Royal Astronomical Society. 427 (1): 550–568. arXiv:1208.5143. Bibcode:2012MNRAS.427..550L. doi:10.1111/j.1365-2966.2012.21984.x. ISSN 0035-8711.
  8. ^ Ball, Rayford; Burns, Jack O.; Loken, Chris (January 1993). "The Radio Properties of CD Galaxies in Abell Clusters. II. The VLA Sample". The Astronomical Journal. 105: 53. Bibcode:1993AJ....105...53B. doi:10.1086/116409. ISSN 0004-6256.
  9. ^ Bagchi, Joydeep; Kapahi, Vijay K. (September 1994). "A VLA 20-CENTIMETRE and 90-CENTIMETRE Radio Survey of Distant Abell Clusters with Central CD Galaxies". Journal of Astrophysics and Astronomy. 15: 275. Bibcode:1994JApA...15..275B. doi:10.1007/BF02709306. ISSN 0250-6335.
  10. ^ Hogan, M. T.; Edge, A. C.; Hlavacek-Larrondo, J.; Grainge, K. J. B.; Hamer, S. L.; Mahony, E. K.; Russell, H. R.; Fabian, A. C.; McNamara, B. R.; Wilman, R. J. (October 2015). "A comprehensive study of the radio properties of brightest cluster galaxies". Monthly Notices of the Royal Astronomical Society. 453 (2): 1201–1222. arXiv:1507.03019. doi:10.1093/mnras/stv1517. ISSN 0035-8711.
  11. ^ Donahue, Megan; Voit, G. Mark; O'Dea, Christopher P.; Baum, Stefi A.; Sparks, William B. (September 2005). "Two Clusters of Galaxies with Radio-quiet Cooling Cores". The Astrophysical Journal. 630 (1): L13–L16. arXiv:astro-ph/0508587. Bibcode:2005ApJ...630L..13D. doi:10.1086/462416. ISSN 0004-637X.
  12. ^ Wang, Jing; Overzier, Roderik; Kauffmann, Guinevere; von der Linden, Anja; Kong, Xu (January 2010). "The UV-optical colours of brightest cluster galaxies in optically and X-ray selected clusters". Monthly Notices of the Royal Astronomical Society. 401 (1): 433–444. arXiv:0909.1196. Bibcode:2010MNRAS.401..433W. doi:10.1111/j.1365-2966.2009.15653.x. ISSN 0035-8711.
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