Quasar in the constellation Mensa
PKS 0637-752 is a quasar located six billion light years in the constellation of Mensa .[ 1] astrophysical jet at redshift of z = 0.651.[ 2] [ 3] Einstein Observatory in 1980 through X-rays,[ 4] 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] sun , with a supermassive black hole in its center.[ 8] [ 9]
X-ray jet
PKS 0637-752 contains a high γ-ray flux[ 10] [ 11] [ 12] Hubble Space Telescope [ 13] Spitzer .[ 14] 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] 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
^ "NED Search Results for PKS 0637-752" . ned.ipac.caltech.edu . Retrieved 2024-09-04 .^ a b Schwartz, D. A.; Marshall, H. L.; Lovell, J. E. J.; Piner, B. G.; Tingay, S. J.; Birkinshaw, M.; Chartas, G.; Elvis, M.; Feigelson, E. D.; Ghosh, K. K.; Harris, D. E.; Hirabayashi, H.; Hooper, E. J.; Jauncey, D. L.; Lanzetta, K. M. (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 . ^ 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.; Nicolson, G.; Hirabayashi, H.; Reynolds, J. E.; Tzioumis, A. K.; Jones, D. L.; Lister, M. L.; Meier, D. L.; Birkinshaw, M.; Chartas, G.; Feigleson, E. D.; Garmire, G. P.; Ghosh, K. K.; Marshall, H. L.; Mathur, S.; Sambruna, R. M.; Schwartz, D. A.; Tucker, W. H.; Wilkes, B.; Worrall, D. M. (2000). "VSOP and ATCA Observations of PKS 0637-752" . Astrophysical Phenomena Revealed by Space Vlbi : 215. Bibcode :2000aprs.conf..215L . Retrieved 2024-09-04 . ^ Elvis, M.; Fabbiano, G. (1984-05-01). "X-ray and UV observations of two radio-bright quasars" . The Astrophysical Journal . 280 : 91– 97. Bibcode :1984ApJ...280...91E . doi :10.1086/161970 . ISSN 0004-637X . ^ Chartas, G.; Worrall, D. M.; Birkinshaw, M.; Cresitello-Dittmar, M.; Cui, W.; Ghosh, K. K.; Harris, D. E.; Hooper, E. J.; Jauncey, D. L.; Kim, D.-W.; Lovell, J.; Mathur, S.; Schwartz, D. A.; Tingay, S. J.; Virani, S. N. (2000-10-20). "TheChandra X-Ray Observatory Resolves 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 . ^ 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. arXiv :2406.17687 doi :10.3847/1538-4357/ad4111 ISSN 0004-637X . ^ 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. arXiv :0909.0932 doi :10.1111/j.1365-2966.2009.15898.x ISSN 0035-8711 . ^ "Chandra Press Room :: Fact Sheet: PKS 0637-752" . chandra.si.edu . Retrieved 2024-09-04 .^ "Distant Quasar Ejects 2 Million Light-Year Long Jet of Cosmic Material" . SciTechDaily . October 23, 2012.^ 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 : stw3316. arXiv :1610.01580 doi :10.1093/mnras/stw3316 ISSN 0035-8711 . ^ 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. arXiv :1511.00258 Bibcode :2016ApJ...817..121B . doi :10.3847/0004-637X/817/2/121 ISSN 0004-637X . ^ 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. Bibcode :2006PASJ...58..233E . doi :10.1093/pasj/58.2.233 . ISSN 0004-6264 . ^ 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. arXiv :0809.1608 doi :10.1088/0004-637X/690/2/1706 . ISSN 0004-637X . ^ 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 . ^ 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 . arXiv :astro-ph/0007441 doi :10.1086/317292 . ISSN 0004-637X . ^ 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. arXiv :1611.08046 doi :10.3847/1538-4357/835/1/20 ISSN 0004-637X .
