QSO B1150+812

QSO B1150+812
The quasar QSO B1150+812.
Observation data (J2000.0 epoch)
ConstellationCamelopardalis
Right ascension11h 5312.499m [1]
Declination+80° 58′ 29.154″[1]
Redshift1.247660[1]
Heliocentric radial velocity374,039 km/s[1]
Distance8.380 Gly
Apparent magnitude (V)19.40
Characteristics
TypeLPQ, FSRQ[1]
Other designations
8C 1150+812, S5 1150+81, 2MASS J11531268+8058293, VLSS J1153.2+8058, 6C B115021.1+811507, WMAP 078, 1150+812[1]

QSO B1150+812 is a quasar located in the constellation of Camelopardalis. It has a redshift of (z) 1.25[2] and it was first discovered in 1983 as an astronomical radio source by astronomers during the 5 GHz S5 survey.[3] This object also has a radio spectrum described as flat, making it a flat-spectrum radio source.[4][1]

Description

The source of QSO B1150+812 is found to be compact.[5] It has a core-jet structure described as one-sided, based on radio mapping taken by Very Long Baseline Array. The radio emission of the source is heavily concentrated within the region of the radio core measuring 0.3 milliarcseconds in extent, contributing most of the flux density at 15.4 GHz.[6][7] Earlier observations conducted in 1987, showed the source has two major components; mainly a northern unresolved component and a southern elongated component displaying a slight extension towards southeast. Evidence showed the gaps of the two components are separating by 0.12 milliarcseconds per year indicating superluminal expansion.[8]

The jet of QSO B1150+812 is described showing superluminal motion and orientating in a southwards direction from the core by 5 milliarcseconds.[9][10] A polarization map at 7.9 GHz frequencies, described the jet's electric vector position angle as roughly perpendicular but offset towards the western edge of the jet, hinting a longitudinal magnetic field.[11]

A rapid polarization swing at 180 degrees, was observed from the quasar by astronomers.[12][13][14] During the swing at between 20 and 25 hours, it was noted the flux density was minimum with a decreased flux densities of 60 mJy at a 1 hour time scale. Based from observation results, astronomers suggested the swing was caused by the occultation of two polarized components via interstellar clouds. This theory might be explained by refractive focusing.[12]

References

  1. ^ a b c d e f g "Results for QSO B1150+812 (QSO 1150+812)". NASA/IPAC Extragalactic Database. Retrieved 2025-05-04.
  2. ^ Pérez-Torres, M. A.; Marcaide, J. M.; Guirado, J. C.; Ros, E.; Shapiro, I. I.; Ratner, M. I.; Sardón, E. (August 2000). "Towards global phase-delay VLBI astrometry: observations of QSO 1150+812 and BL 1803+784". Astronomy and Astrophysics. 360: 161–170. arXiv:astro-ph/0005551. Bibcode:2000A&A...360..161P. ISSN 0004-6361.
  3. ^ Geldzahler, B. J.; Kuhr, H. (August 1983). "31.4 GHz flux density measurements of a complete sample of sources from the 5 GHz S5 survey". The Astronomical Journal. 88: 1126–1132. Bibcode:1983AJ.....88.1126G. doi:10.1086/113401. ISSN 0004-6256.
  4. ^ Eckart, A.; Witzel, A.; Biermann, P.; Johnston, K. J.; Simon, R.; Schalinski, C.; Kuhr, H. (November 1986). "Investigation of a complete sample of flat spectrum radio sources from the S5 Survey. I. Analysis". Astronomy and Astrophysics. 168: 17–24. Bibcode:1986A&A...168...17E. ISSN 0004-6361.
  5. ^ Kassiola, Aggeliki; Kovner, Israel; Blandford, Roger D. (November 1991). "Bounds on Intergalactic Compact Objects from Observations of Compact Radio Sources". The Astrophysical Journal. 381: 6. Bibcode:1991ApJ...381....6K. doi:10.1086/170624. ISSN 0004-637X.
  6. ^ Dodson, R.; Fomalont, E. B.; Wiik, K.; Horiuchi, S.; Hirabayashi, H.; Edwards, P. G.; Murata, Y.; Asaki, Y.; Moellenbrock, G. A.; Scott, W. K.; Taylor, A. R.; Gurvits, L. I.; Paragi, Z.; Frey, S.; Shen, Z.-Q. (April 2008). "The VSOP 5 GHz Active Galactic Nucleus Survey. V. Imaging Results for the Remaining 140 Sources". The Astrophysical Journal Supplement Series. 175 (2): 314–355. arXiv:0710.5707. Bibcode:2008ApJS..175..314D. doi:10.1086/525025. ISSN 0067-0049.
  7. ^ Pérez-Torres, M. A.; Marcaide, J. M.; Guirado, J. C.; Ros, E. (2004-12-01). "Absolute kinematics of radio source components in the complete S5 polar cap sample - II. First and second epoch maps at 15 GHz" (PDF). Astronomy & Astrophysics. 428 (3): 847–866. arXiv:astro-ph/0408581. Bibcode:2004A&A...428..847P. doi:10.1051/0004-6361:20040423. ISSN 0004-6361.
  8. ^ Eckart, A.; Witzel, A.; Biermann, P.; Johnston, K. J.; Simon, R.; Schalinski, C.; Kuhr, H. (January 1987). "Investigation of a complete sample of flat spectrum radio sources from the S5 survey. II. Results". Astronomy and Astrophysics Supplement Series. 67: 121–146. Bibcode:1987A&AS...67..121E. ISSN 0365-0138.
  9. ^ Cruz-Gonzalez, Irene; Carrillo, Rene (October 1991). "Jet models and observed jets in a sample of superluminal active galactic nuclei". Revista Mexicana de Astronomía y Astrofísica. 22: 217. Bibcode:1991RMxAA..22..217C. ISSN 0185-1101.
  10. ^ Ros, E.; Marcaide, J. M.; Guirado, J. C.; Pérez-Torres, M. A. (2001-09-01). "Absolute kinematics of radio source components in the complete S5 polar cap sample - I. First and second epoch maps at 8.4 GHz" (PDF). Astronomy & Astrophysics. 376 (3): 1090–1105. arXiv:astro-ph/0107155. Bibcode:2001A&A...376.1090R. doi:10.1051/0004-6361:20010987. ISSN 0004-6361.
  11. ^ Gabuzda, D. C.; Reichstein, A. R.; O'Neill, E. L. (2014-10-11). "Are spine–sheath polarization structures in the jets of active galactic nuclei associated with helical magnetic fields?". Monthly Notices of the Royal Astronomical Society. 444 (1): 172–184. arXiv:1410.6653. doi:10.1093/mnras/stu1381. ISSN 0035-8711.
  12. ^ a b Qian, Shan-Jie; Krichbaum, T. P; Zhang, Xi-Zhen; Fuhrmann, L; Cimò, G; Kraus, A; Beckert, T; Britzen, S; Witzel, A; Zensus, J. A (February 2006). "Refractive Focusing by Interstellar Clouds and the Rapid Polarization Angle Swing in QSO 1150+812". Chinese Journal of Astronomy and Astrophysics. 6 (1): 1–14. Bibcode:2006ChJAA...6....1Q. doi:10.1088/1009-9271/6/1/001. ISSN 1009-9271.
  13. ^ Qian, Shan-Jie; Krichbaum, T. P; Gao, Long; Zhang, Xi-Zhen; Witzel, A; Zensus, J. A (April 2007). "Refractive Focusing of Interstellar Clouds and Intraday Polarization Angle Swings". Chinese Journal of Astronomy and Astrophysics. 7 (2): 215–223. Bibcode:2007ChJAA...7..215Q. doi:10.1088/1009-9271/7/2/05. ISSN 1009-9271.
  14. ^ Qian, Shan-Jie; Zhang, Xi-Zhen (February 2004). "An Intrinsic Model for the Polarization Position Angle Swing Observed in QSO 1150+812". Chinese Journal of Astronomy and Astrophysics. 4 (1): 37–50. Bibcode:2004ChJAA...4...37Q. doi:10.1088/1009-9271/4/1/37. ISSN 1009-9271.
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