PKS 0625−53

PKS 0625−53
The radio galaxy PKS 0625−53.
Observation data (J2000 epoch)
ConstellationCarina
Right ascension06h 26m 19.40s[1]
Declination−53° 41′ 34.48″[1]
Redshift0.053900[1]
Heliocentric radial velocity16,159 km/s[1]
Distance752 Mly
Group or clusterAbell 3391
Apparent magnitude (V)15.4
Characteristics
Type2 E pec galaxies[1]
Size~227,100 ly (69.64 kpc) (estimated)[1]
Other designations
AM 0625−533, PGC 19045, ESO 161−IG 007, MRC 0625−536, PKS B0625−536, RX J0626.3−5342, SGC 0625−537, SUMSS J062621−534122[1]

PKS 0625−53 also known as ESO 161−IG 007, is a low-excitation radio galaxy located in the constellation of Carina. The redshift of the object is (z) 0.053[1] and it was discovered by astronomers conducting the Parkes Catalogue of Radio Sources survey in September 1964.[2] It is the brightest cluster galaxy located in the center of Abell 3391.[3][4][5]

Description

PKS 0625−53 is classified as a Fanaroff-Riley class Type I radio galaxy.[6][7] The host galaxy is confirmed to be an elliptical galaxy and it makes the eastern half of the dumbbell galaxy system.[8][4] There is a tidal feature which is interpreted as a broad tidal bridge connecting the two galaxies, thus confirming they are interacting with one another.[8][9] There is also a large envelope structure surrounding the galaxy and other galaxies that are close to it.[10]

Studies have shown PKS 0625−53 has a radio-loud active galactic nucleus (AGN) with the X-ray emission mainly concentrated in the eastern half.[11] The central supermassive black hole mass of the galaxy is estimated to be 9.57 Mʘ.[12]

PKS 0625−53 has a wide-angle tail (WAT) structure with the two tails sharply bending at about 20 arcseconds north and 40 arcsececonds south of the nucleus. The radio jets that are opposite directed from the source, are also suggested as deflated mainly due to pressure gradients of the surrounding intercluster medium.[13][14] The radio lobes of the source have no signs of depolarization. A study showed the northern lobe has a greater rotation measure gradient with a value of –430 rad m–2.[13] Radio imaging made by the Chandra X-ray Observatory found there is a decrease of emission in an overlapping area, hinting at an X-ray cavity.[15]

References

  1. ^ a b c d e f g h "NED Search results for PKS 0625-53". NASA/IPAC Extragalactic Database. Retrieved 2025-11-01.
  2. ^ Bolton, J. G.; Gardner, F. F.; Mackey, M. B. (September 1964). "The Parkes catalogue of radio sources, declination zone -20° to -60°". Australian Journal of Physics. 17 (3): 340. Bibcode:1964AuJPh..17..340B. doi:10.1071/PH640340. ISSN 0004-9506.
  3. ^ Burgess, A. M.; Hunstead, R. W. (January 2006). "The Molonglo Southern 4 Jy Sample (MS4). II. ATCA Imaging and Optical Identification". The Astronomical Journal. 131 (1): 114–132. arXiv:astro-ph/0512590. Bibcode:2006AJ....131..114B. doi:10.1086/498679. ISSN 0004-6256.
  4. ^ a b Brüggen, M.; Reiprich, T. H.; Bulbul, E.; Koribalski, B. S.; Andernach, H.; Rudnick, L.; Hoang, D. N.; Wilber, A. G.; Duchesne, S. W.; Veronica, A.; Pacaud, F.; Hopkins, A. M.; Norris, R. P.; Johnston-Hollitt, M.; Brown, M. J. I. (2021-03-01). "Radio observations of the merging galaxy cluster system Abell 3391-Abell 3395". Astronomy & Astrophysics. 647: A3. arXiv:2012.08775. Bibcode:2021A&A...647A...3B. doi:10.1051/0004-6361/202039533. ISSN 0004-6361.
  5. ^ Mingo, B.; Hardcastle, M. J.; Croston, J. H.; Dicken, D.; Evans, D. A.; Morganti, R.; Tadhunter, C. (2014-03-08). "An X-ray survey of the 2 Jy sample – I. Is there an accretion mode dichotomy in radio-loud AGN?". Monthly Notices of the Royal Astronomical Society. 440 (1): 269–297. arXiv:1402.1770. doi:10.1093/mnras/stu263. ISSN 1365-2966.
  6. ^ Morganti, R.; Oosterloo, T.; Tadhunter, C. N.; Aiudi, R.; Jones, P.; Villar-Martin, M. (December 1999). "The radio structures of southern 2-Jy radio sources: New ATCA and VLA radio images". Astronomy and Astrophysics Supplement Series. 140 (3): 355–372. arXiv:astro-ph/9910150. Bibcode:1999A&AS..140..355M. doi:10.1051/aas:1999427. ISSN 0365-0138.
  7. ^ Trussoni, E.; Feretti, L.; Massaglia, S.; Parma, P. (2001-02-01). "BeppoSAX observation of Hercules A and MRC 0625-536". Astronomy & Astrophysics. 366 (3): 788–795. arXiv:astro-ph/0011455. Bibcode:2001A&A...366..788T. doi:10.1051/0004-6361:20000334. ISSN 0004-6361.
  8. ^ a b Inskip, K. J.; Tadhunter, C. N.; Morganti, R.; Holt, J.; Ramos Almeida, C.; Dicken, D. (2010-07-15). "A near-IR study of the host galaxies of 2 Jy radio sources at 0.03 ≲z≲ 0.5 - I. The data★". Monthly Notices of the Royal Astronomical Society. 407 (3): 1739–1766. arXiv:1005.2195. doi:10.1111/j.1365-2966.2010.17002.x. ISSN 0035-8711.
  9. ^ Ramos Almeida, C.; Tadhunter, C. N.; Inskip, K. J.; Morganti, R.; Holt, J.; Dicken, D. (October 2010). "The optical morphologies of the 2 Jy sample of radio galaxies: evidence for galaxy interactions". Monthly Notices of the Royal Astronomical Society: no. arXiv:1008.2683. doi:10.1111/j.1365-2966.2010.17542.x. ISSN 0035-8711.
  10. ^ Tritton, K. P.; Whitworth, D. P. D. (1973-12-01). "Identifications of Southern Parkes Radio sources" (PDF). Monthly Notices of the Royal Astronomical Society. 165 (3): 253–257. doi:10.1093/mnras/165.3.253. ISSN 0035-8711.
  11. ^ Gliozzi, M.; Brinkmann, W.; Laurent-Muehleisen, S. A.; Takalo, L. O.; Sillanpää, A. (December 1999). "ROSAT HRI observations of radio-loud AGN". Astronomy and Astrophysics. 352: 437–442. arXiv:astro-ph/9911055. Bibcode:1999A&A...352..437G. ISSN 0004-6361.
  12. ^ Bettoni, D.; Falomo, R.; Fasano, G.; Govoni, F. (2003-03-01). "The black hole mass of low redshift radiogalaxies" (PDF). Astronomy & Astrophysics. 399 (3): 869–878. arXiv:astro-ph/0212162. Bibcode:2003A&A...399..869B. doi:10.1051/0004-6361:20021869. ISSN 0004-6361.
  13. ^ a b Morganti, R.; Oosterloo, T.; Tadhunter, C. N.; Aiudi, R.; Jones, P.; Villar-Martin, M. (December 1999). "The radio structures of southern 2-Jy radio sources: New ATCA and VLA radio images". Astronomy and Astrophysics Supplement Series. 140 (3): 355–372. arXiv:astro-ph/9910150. Bibcode:1999A&AS..140..355M. doi:10.1051/aas:1999427. ISSN 0365-0138.
  14. ^ Otani, C.; Brinkmann, W.; Boehringer, H.; Reid, A.; Siebert, J. (November 1998). "ASCA/ROSAT observations of the radio source MRC 0625-536". Astronomy and Astrophysics. 339: 693–700. Bibcode:1998A&A...339..693O. ISSN 0004-6361.
  15. ^ Mingo, B.; Hardcastle, M. J.; Ineson, J.; Mahatma, V.; Croston, J. H.; Dicken, D.; Evans, D. A.; Morganti, R.; Tadhunter, C. (2017-05-29). "An X-ray survey of the 2 Jy sample – II. X-ray emission from extended structures". Monthly Notices of the Royal Astronomical Society. 470 (3): 2762–2779. arXiv:1705.09578. doi:10.1093/mnras/stx1307. ISSN 0035-8711.
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