Astronomy:PKS 0637−752

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PKS 0637−752
File:PKS 0637-752- NASA Unveils First Images From Chandra X-Ray Observatory (1999-0064 - 0064 xray).tiff
Chandra X-ray Observatory image of PKS 0637−752
Observation data (J2000.0 epoch)
ConstellationMensa
Right ascension 06h 35m 46.5s
Declination−75° 16′ 16.8″
Redshift0.653000
Helio radial velocity195,765 km/s
Distance6.0 Gly
Apparent magnitude (V)0.34
Apparent magnitude (B)0.26
Characteristics
TypeFRSQ, Blazar
Notable featuresX-ray jet
Other designations
IRAS F06374−7513, PGC 2824867, MRC 0637−752, 2E 1720, OCARS 0637−752

PKS 0637−752 is a quasar located six billion light years in the constellation of Mensa.[1] It is noted for having a bright and largest astrophysical jet at redshift of z = 0.651.[2][3] Discovered by Einstein Observatory in 1980 through X-rays,[4] PKS 0637−752 was the first celestial object to be observed by Chandra X-ray Observatory upon its commissioning in July 23, 1999.[5]

Characteristics

PKS 0637−752 contains an active galactic nucleus. It is classified a blazar, a type of an active galaxy with a relativistic jet pointing towards Earth's direction.[6][7] Like other quasars, PKS 0637−752 is considered luminous, powering up 10 trillion times the sun, with a supermassive black hole in its center.[8][9]

X-ray jet

PKS 0637−752 contains a high γ-ray flux[10] X-ray jet[11][12] studied by Hubble Space Telescope[13] and Spitzer.[14] The jet extends ≥100 kiloparsecs wide and has a luminosity of ~1044.6 ergs−1. It produces X-ray emission through inverse Compton scattering from the cosmic microwave background.[15]

Further observations from Hubble also found three small knots occurring concurrently with the X-ray emission and peak radio.[2] According to observations made by Australia Telescope Compact Array, these knots are shown to be quasi-periodic with a separation gap of ~1.1 arcsecs. Using two class models, astronomers calculated the jet power of PKS 0637−752 to be Q ~ 1046 erg/s and the jet engine modulation to be 2 x 103 yr < \tau < 3x 105 yr. Such evidence, proves the jet structure in the quasar might result from an unstable accretion disk, causing limit cycle behavior.[16]

References

  1. ↑ "NED Search Results for PKS 0637-752". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=61614&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 
  2. ↑ 2.0 2.1 Schwartz, D. A.; Marshall, H. L.; Lovell, J. E. J.; Piner, B. G.; Tingay, S. J.; Birkinshaw, M.; Chartas, G.; Elvis, M. et al. (2000-09-10). "[ITAL]Chandra[/ITAL] Discovery of a 100 kiloparsec X-Ray Jet in PKS 0637−752". The Astrophysical Journal 540 (2): L69–L72. doi:10.1086/312875. ISSN 0004-637X. 
  3. ↑ Lovell, J. E. J.; Tingay, S. J.; Piner, B. G.; Jauncey, D. L.; Preston, R. A.; Murphy, D. W.; McCulloch, P. M.; Costa, M. E. et al. (2000). "VSOP and ATCA Observations of PKS 0637-752". Astrophysical Phenomena Revealed by Space Vlbi: 215. Bibcode: 2000aprs.conf..215L. https://adsabs.harvard.edu/full/2000aprs.conf..215L. Retrieved 2024-09-04. 
  4. ↑ Elvis, M.; Fabbiano, G. (1984-05-01). "X-ray and UV observations of two radio-bright quasars.". The Astrophysical Journal 280: 91–97. doi:10.1086/161970. ISSN 0004-637X. Bibcode: 1984ApJ...280...91E. https://ui.adsabs.harvard.edu/abs/1984ApJ...280...91E. 
  5. ↑ Chartas, G.; Worrall, D. M.; Birkinshaw, M.; Cresitello-Dittmar, M.; Cui, W.; Ghosh, K. K.; Harris, D. E.; Hooper, E. J. et al. (2000-10-20). "TheChandra X-Ray ObservatoryResolves the X-Ray Morphology and Spectra of a Jet in PKS 0637−752". The Astrophysical Journal 542 (2): 655–666. doi:10.1086/317049. ISSN 0004-637X. Bibcode: 2000ApJ...542..655C. 
  6. ↑ Podjed, Stephanie A.; Hickox, Ryan C.; Isler, Jedidah C.; Böttcher, Markus; Schutte, Hester M. (2024-06-01). "Optical Spectropolarimetric Variability Properties in Blazars PKS 0637–75 and PKS 1510–089". The Astrophysical Journal 968 (2): 130. doi:10.3847/1538-4357/ad4111. ISSN 0004-637X. Bibcode: 2024ApJ...968..130P. 
  7. ↑ Ghisellini, G.; Tavecchio, F.; Foschini, L.; Ghirlanda, G.; Maraschi, L.; Celotti, A. (2009-11-26). "General physical properties of bright Fermi blazars". Monthly Notices of the Royal Astronomical Society 402 (1): 497–518. doi:10.1111/j.1365-2966.2009.15898.x. ISSN 0035-8711. 
  8. ↑ "Chandra Press Room :: Fact Sheet: PKS 0637-752". https://chandra.si.edu/press/pksfact.html. 
  9. ↑ "Distant Quasar Ejects 2 Million Light-Year Long Jet of Cosmic Material". October 23, 2012. https://scitechdaily.com/distant-quasar-ejects-2-million-light-year-long-jet-of-cosmic-material/. 
  10. ↑ Lucchini, M.; Tavecchio, F.; Ghisellini, G. (2016-12-22). "Revisiting the EC/CMB model for extragalactic large scale jets". Monthly Notices of the Royal Astronomical Society. doi:10.1093/mnras/stw3316. ISSN 0035-8711. 
  11. ↑ Bhattacharyya, Wrijupan; Gupta, Nayantara (2016-02-01). "Proton Synchrotron Radiation from Extended Jets of PKS 0637-752 and 3C 273". The Astrophysical Journal 817 (2): 121. doi:10.3847/0004-637X/817/2/121. ISSN 0004-637X. Bibcode: 2016ApJ...817..121B. 
  12. ↑ Edwards, Philip G.; Piner, B. Glenn; Tingay, Steven J.; Lovell, James E. J.; Kataoka, Jun; Ojha, Roopesh; Murata, Yasuhiro (2006-04-01). "The Parsec-Scale Jet of PKS 0637-752". Publications of the Astronomical Society of Japan 58: 233–241. doi:10.1093/pasj/58.2.233. ISSN 0004-6264. Bibcode: 2006PASJ...58..233E. https://ui.adsabs.harvard.edu/abs/2006PASJ...58..233E/abstract. 
  13. ↑ Mehta, Kushal T.; Georganopoulos, Markos; Perlman, Eric S.; Padgett, Charles A.; Chartas, George (2009-01-01). "HST observations of the quasar PKS 0637-752: equipartition electron-proton jet from the most complete spectral coverage to date". The Astrophysical Journal 690 (2): 1706–1714. doi:10.1088/0004-637X/690/2/1706. ISSN 0004-637X. 
  14. ↑ Uchiyama, Yasunobu; Urry, C. Megan; Van Duyne, Jeffrey; Cheung, C. C.; Sambruna, Rita M.; Takahashi, Tadayuki; Tavecchio, Fabrizio; Maraschi, Laura (2005-09-14). "Spitzer IRAC Imaging of the Relativistic Jet from Superluminal Quasar PKS 0637-752". The Astrophysical Journal 631 (2): L113–L116. doi:10.1086/497426. ISSN 0004-637X. Bibcode: 2005ApJ...631L.113U. 
  15. ↑ Tavecchio, Fabrizio; Maraschi, Laura; Sambruna, Rita M.; Urry, C. Megan (2000-11-20). "The X-Ray Jet of PKS 0637−752: Inverse Compton Radiation from the Cosmic Microwave Background?". The Astrophysical Journal 544 (1): L23–L26. doi:10.1086/317292. ISSN 0004-637X. Bibcode: 2000ApJ...544L..23T. 
  16. ↑ Kusunose, Masaaki; Takahara, Fumio (2017-01-16). "A Photo-Hadronic Model of the Large-Scale Jet of PKS 0637-752". The Astrophysical Journal 835 (1): 20. doi:10.3847/1538-4357/835/1/20. ISSN 0004-637X. Bibcode: 2017ApJ...835...20K. 



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