PKS 0054+018

PKS 0054+018
SDSS image of PKS 0054+018
Observation data (J2000.0 epoch)
ConstellationCetus
Right ascension00h 57m 27.88s[1]
Declination+02° 09′ 34.50″[1]
Redshift0.292362[1]
Heliocentric radial velocity87,648 ± 14 km/s[1]
Distance4,200.4 ± 294.0 Mly (1,287.85 ± 90.15 Mpc)[1]
Group or clusterWHL J005727.9+020935
magnitude (K)13.11[1]
Characteristics
TypeElliptical[1]
Size~623,000 ly (191.0 kpc) (estimated)[1]
Other designations
2MASX J00572791+0209345, APMUKS(BJ) B005453.49+015322.2, LEDA 1217899, MRC 0054+018, NVSS J005727+020933, PKS B0054+018, RGZ J005727.8+020934, WHL J005727.9+020935 BCG[1]

PKS 0054+018 also known as RGZ J005727.8+020934, is a radio galaxy located in the constellation of Cetus. The redshift of the galaxy has been estimated as (z) 0.292[1] and it was first discovered as an astronomical radio source by astronomers in October 1975.[2] Subsequently, it was identified with a galaxy counterpart in November 1976.[3]

Description

PKS 0054+018 is a Fanaroff-Riley Class Type I radio galaxy residing as the brightest cluster galaxy (BCG) of the galaxy cluster, WHL J005727.9+020935 with 39 confirmed galaxy member candidates. The total r-band magnitude of the galaxy is 17.32 magnitude and its absolute magnitude is -23.67.[4][5][6] There is no evidence of an extended emission-line region (EELR).[7]

The galaxy contains an extended radio source depicted as a double based on radio imaging made by the Very Large Array (VLA), with the total flux density of 0.550 mJy at 1.5 GHz frequencies and 0.160 at 4.9 GHz frequencies. A total spectral index is calculated to be 0.95α.[5][8]

The total radio luminosity of the source at 1.4 GHz is estimated to be 25.9 W Hz-1 and the largest projected size is 182 kiloparsecs.[5] The radio power is calculated to be 119.18 × 1024 WHz-1 and the flux density is 433.0 mJy at 1.4 GHz, obtained by the NRAO VLA Sky Survey (NVSS).[6]

The radio source is bent, with an angle of 14.3°, with an excess bending angle of 8.7°. The source tail is also radically bent in respect to the cluster.[9] The optical spectrum of the galaxy displays strong signatures of emission lines, including hydrogen-beta, magnesium b triplet and calcium monohydride.[10]

References

  1. 1 2 3 4 5 6 7 8 9 10 "NED Search results for PKS 0054+018". NASA/IPAC Extragalactic Database. Retrieved 2026-06-11.
  2. ↑ Balonek, T. J.; Broderick, J. J.; Condon, J. J.; Crawford, D. F. (October 1975). "Spectral Intensity Dependence and Isotropy of Sources Stronger than 0.1 jy at 2700 MHz". Astrophysical Journal. 201: 20–25. Bibcode:1975ApJ...201...20B. doi:10.1086/153854.
  3. ↑ Condon, J. J.; Balonek, T. J.; Jauncey, D. L. (November 1976). "Optical identification of sources in the Parkes 2.7-GHz selected-areas surveys". Astronomical Journal. 81: 913–918. Bibcode:1976AJ.....81..913C. doi:10.1086/111970.
  4. ↑ Wen, Z. L.; Han, J. L.; Liu, F. S. (2012-03-30). "A Catalog of 132,684 Clusters of Galaxies Identified from Sloan Digital Sky Survey III". The Astrophysical Journal Supplement Series. 199 (2): 34. arXiv:1202.6424. Bibcode:2012ApJS..199...34W. doi:10.1088/0067-0049/199/2/34. ISSN 0067-0049.
  5. 1 2 3 Meusinger, Helmut; Mhaskey, Mukul (2024-01-26). "A comparison of compact, presumably young with extended, evolved radio active galactic nuclei" (PDF). Astronomy & Astrophysics. 682: A18. arXiv:2311.15009. Bibcode:2024A&A...682A..18M. doi:10.1051/0004-6361/202243388. ISSN 0004-6361.
  6. 1 2 Yuan, Z. S.; Han, J. L.; Wen, Z. L. (2016-05-12). "Radio luminosity function of brightest cluster galaxies". Monthly Notices of the Royal Astronomical Society. 460 (4): 3669–3678. arXiv:1605.03387. doi:10.1093/mnras/stw1125. ISSN 0035-8711.
  7. ↑ Shih, Hsin-Yi; Stockton, Alan (2014-04-08). "The Three-Dimensional Properties and Energetics of Radio-Jet-Driven Outflows". The Astrophysical Journal. 786 (1): 3. arXiv:1406.5528. Bibcode:2014ApJ...786....3S. doi:10.1088/0004-637x/786/1/3. ISSN 0004-637X.
  8. ↑ Downes, A. J. B.; Peacock, J. A.; Savage, A.; Carrie, D. R. (1986-01-01). "The Parkes selected regions: powerful radio galaxies and quasars at high redshifts". Monthly Notices of the Royal Astronomical Society. 218 (1): 31–62. doi:10.1093/mnras/218.1.31. ISSN 0035-8711.
  9. ↑ Garon, Avery F.; Rudnick, Lawrence; Wong, O. Ivy; Jones, Tom W.; Kim, Jin-Ah; Andernach, Heinz; Shabala, Stanislav S.; Kapińska, Anna D.; Norris, Ray P.; de Gasperin, Francesco; Tate, Jean; Tang, Hongming (2019-02-28). "Radio Galaxy Zoo: The Distortion of Radio Galaxies by Galaxy Clusters". The Astronomical Journal. 157 (3): 126. arXiv:1901.05480. Bibcode:2019AJ....157..126G. doi:10.3847/1538-3881/aaff62. ISSN 0004-6256.
  10. ↑ Allington-Smith, J. R.; Peacock, J. A.; Dunlop, J. S. (November 1991). "Spectroscopy of radio sources from the Parkes Selected Regions". Monthly Notices of the Royal Astronomical Society. 253 (2): 287–294. doi:10.1093/mnras/253.2.287. ISSN 0035-8711.
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