Astronomy:4C 49.22

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4C 49.22
The quasar 4C 49.22
Observation data (J2000.0 epoch)
ConstellationUrsa Major
Right ascension 11h 53m 24.46s[1]
Declination+49° 31′ 08.83″[1]
Redshift0.333640[1]
Helio radial velocity100023 km/s[1]
Distance3.848 Gly
Apparent magnitude (V)17.66
Apparent magnitude (B)17.94
Characteristics
TypeFSRQ[1]
Size~470,000 ly (144 kpc) (estimated)[1]
Other designations
SBS 1150+497, 21P 164, 2MASX J11532449+4931090, LEDA 2821081, CoNFIG 114, LB 02136, LHE 310, NVSS J115324+493109, OM +484, RBS 1046, RX J1153.4+4931[1]

4C 49.22 is a radio-loud quasar[2] located in the constellation of Ursa Major. The redshift of the object is (z) 0.333[1] and it was first discovered as an astronomical radio source in 1967 by astronomers.[3] The radio spectrum of the object is considered flat, making this a flat spectrum radio quasar.[4][5]

Description

4C 49.22 is categorized as a blazar, mainly due to its variability on the electromagnetic spectrum, with one gamma ray displayed on 15 May 2011 after being in a long period of low gamma-ray activity state when observed by the Large Area Telescope (LAT).[6][5] Its host is an extremely large luminous elliptical galaxy[7] with an off-centered nucleus and a slight elongation towards the north-east. A faint tidal arm is curved, suggesting an interaction with a small companion 10 arcseconds away from it.[8] The central supermassive black hole of the quasar is estimated to be 3.3 x 108 Mʘ.[5]

The radio structure of 4C 49.22 is compact. When observed by the Very Long Baseline Array (VLA), the source is found to be a triple with a halo structure located in north to south direction. There is a bright radio core present with an estimated flux density of 338 mJy at 5 GHz frequencies and a flat spectrum between frequencies of 1.6 and 15 GHz.[9][10]

The one-sided radio jet of the quasar is extensively studied. When observed by Very Long Baseline Interferometry (VLBI), the jet is found be slightly extended for about three milliarcseconds. There is also a knot feature present in the jet at around 1.39 ± 0.1 milliarcsecond from the core region. On the southwest side its intensity is increasing brightly until the knot position, where it fades away.[11] This jet is also described as having a knotty appearance, with the knot features having a jet power between 2.0 x 1045 to 1.4 x 1048 erg s-1.[4] There is also a high amount of polarization present in the jet as well as variations along the rotation measure of the jet, increasing from 15 rad m-2 at the core position until 25 rad m-2 at a knot feature.[10] This jet has been also been studied in X-rays, where a hotspot feature is located in its southern lobe and further separated into two components.[12]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NED Search results for 4C 49.22". https://ned.ipac.caltech.edu/byname?objname=4C+49.22&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1. 
  2. ↑ Sambruna, Rita M.; Gliozzi, Mario; Tavecchio, F.; Maraschi, L.; Foschini, Luigi (2006-11-20). "The Jet-Disk Connection in AGNs:ChandraandXMM-NewtonObservations of Three Powerful Radio-Loud Quasars" (in en). The Astrophysical Journal 652 (1): 146–156. doi:10.1086/507420. ISSN 0004-637X. Bibcode: 2006ApJ...652..146S. https://ui.adsabs.harvard.edu/abs/2006ApJ...652..146S/abstract. 
  3. ↑ Wills, D. (1967). "Optical identifications of selected 4C radio sources" (in en). Monthly Notices of the Royal Astronomical Society 135: 339. doi:10.1093/mnras/135.4.339. ISSN 0035-8711. Bibcode: 1967MNRAS.135..339W. https://ui.adsabs.harvard.edu/abs/1967MNRAS.135..339W/abstract. 
  4. ↑ 4.0 4.1 Zhang, Jin; Zhang, Hai-Ming; Yao, Su; Guo, Sheng-Chu; Lu, Rui-Jing; Liang, En-Wei (October 2018). "Jet Radiation Properties of 4C +49.22: from the Core to Large-scale Knots" (in en). The Astrophysical Journal 865 (2): 100. doi:10.3847/1538-4357/aadd0b. ISSN 0004-637X. Bibcode: 2018ApJ...865..100Z. 
  5. ↑ 5.0 5.1 5.2 Cutini, S.; Ciprini, S.; Orienti, M.; Tramacere, A.; D'Ammando, F.; Verrecchia, F.; Polenta,  G.; Carrasco, L. et al. (2014-11-07). "Radio–gamma-ray connection and spectral evolution in 4C +49.22 (S4 1150+49): the Fermi, Swift and Planck view". Monthly Notices of the Royal Astronomical Society 445 (4): 4316–4334. doi:10.1093/mnras/stu2011. ISSN 1365-2966. 
  6. ↑ Cutini, Sara; Ciprini, Stefano; Larsson, Stefan; Orienti, Monica; D'Ammando, Filippo; Collaboration, Fermi-LAT (December 2012). "Multi-wavelength observations of blazar 4C + 49.22 during flaring state" (in en). High Energy Gamma-Ray Astronomy: 5th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conference Proceedings 1505: 530–533. doi:10.1063/1.4772314. ISSN 0094-243X. Bibcode: 2012AIPC.1505..530C. https://ui.adsabs.harvard.edu/abs/2012AIPC.1505..530C/abstract. 
  7. ↑ Floyd, David J. E.; Kukula, Marek J.; Dunlop, James S.; McLure, Ross J.; Miller, Lance; Percival, Will J.; Baum, Stefi A.; O'Dea, Christopher P. (November 2004). "The host galaxies of luminous quasars" (in en). Monthly Notices of the Royal Astronomical Society 355 (1): 196–220. doi:10.1111/j.1365-2966.2004.08315.x. ISSN 0035-8711. Bibcode: 2004MNRAS.355..196F. 
  8. ↑ Hutchings, J. B.; Johnson, I.; Pyke, R. (April 1988). "Optical images of quasars and radio galaxies" (in en). The Astrophysical Journal Supplement Series 66: 361. doi:10.1086/191261. ISSN 0067-0049. Bibcode: 1988ApJS...66..361H. https://articles.adsabs.harvard.edu/pdf/1988ApJS...66..361H. 
  9. ↑ Cheng, X.-P.; An, T.; Frey, S.; Hong, X.-Y.; He, X.; Kellermann, K. I.; Lister, M. L.; Lao, B.-Q. et al. (2020-04-01). "Compact Bright Radio-loud AGNs. III. A Large VLBA Survey at 43 GHz". The Astrophysical Journal Supplement Series 247 (2): 57. doi:10.3847/1538-4365/ab791f. ISSN 0067-0049. Bibcode: 2020ApJS..247...57C. 
  10. ↑ 10.0 10.1 Akujor, C. E.; Garrington, S. T. (1991-06-01). "MERLIN and VLA observations of the quasar 1150 + 497". Monthly Notices of the Royal Astronomical Society 250 (3): 644–649. doi:10.1093/mnras/250.3.644. ISSN 0035-8711. https://articles.adsabs.harvard.edu/pdf/1991MNRAS.250..644A. 
  11. ↑ Linfield, R. (December 1983). "VLBI observations of the QSO 4C49.22" (in en). The Astrophysical Journal 275: 461. doi:10.1086/161546. ISSN 0004-637X. Bibcode: 1983ApJ...275..461L. https://articles.adsabs.harvard.edu/pdf/1983ApJ...275..461L. 
  12. ↑ Sambruna, Rita M.; Gambill, Jessica K.; Maraschi, L.; Tavecchio, F.; Cerutti, R.; Cheung, C. C.; Urry, C. Megan; Chartas, G. (2004-06-20). "A Survey of Extended Radio Jets withChandraand theHubble Space Telescope". The Astrophysical Journal 608 (2): 698–720. doi:10.1086/383124. ISSN 0004-637X. Bibcode: 2004ApJ...608..698S. https://iopscience.iop.org/article/10.1086/383124/fulltext/. 



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