3C 190

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3C 190
Observation data (J2000.0 epoch)
ConstellationCancer
Right ascension08h 01m 33.55s[1]
Declination+14° 14′ 43.03″[1]
Redshift1.195649
Heliocentric radial velocity358,447 km/s
Distance8.655 Gly
Apparent magnitude (V)20.26
Apparent magnitude (B)21.07
Characteristics
TypeRL1[1]
Size~154,000 ly (47.2 kpc) (estimated)[1]
Other designations
4C +14.25, DA 242, G4Jy 0679, LEDA 2817584, NRAO 0278, OI +198, NVSS J080133+141442, SDSS J080133.55+141442.8, TXS 0758+143[1]

3C 190 is a quasar located in the northern constellation of Cancer. The object has a redshift of (z) 1.195[1] and it was first discovered in 1959 as an astronomical radio source by astronomers.[2] It was then identified with its counterpart in 1971.[3] The radio spectrum of the object is found to be compact and steep, making it a compact steep spectrum quasar (CSS).[4][5][6]

Description

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The radio source of 3C 190 is found to be very compact. When imaged with Very Long Baseline Interferometry (VLBI), it has three components displaying a steep spectrum and a bright compact radio core. But low-surface brightness radio emission is found undetected.[7] Radio imaging made by both MERLIN and European VLBI Network showed there is a jet connecting to at least two components. This jet is suggestive to have an one-sided structure. Further imaging also showed the jet emerges straight from the nucleus region in the west, then bends southwards by around 45°. Hotspot features and a radio bridge of emission is present.[8] A faint extension feature is seen polarized.[5]

The host galaxy of 3C 190 is an elliptical galaxy based on imaging. When observed, it is shown to have a low-surface brightness envelope surrounding it. Further evidence also pointed out the host galaxy is currently undergoing several galaxy mergers given there is an extension in a form of a tidal tail and a secondary tidal feature. This indicates it might become a type-cD galaxy in the future. Luminous knot features have been detected in the host galaxy according to imaging made by Hubble Space Telescope.[9] The star formation rate of the quasar is estimated to be 4.7+0.2-0.1 x 102 Mʘ yr-1.[10]

In December 2002, astronomers detected traces of H I absorption made of neutral hydrogen elements in 3C 190. Upon detection, the absorption features are mainly blueshifted by around 250 kilometers per seconds. This indicates the presence of multiple components with the peak's absorption being 647.728 MHz.[11]

References

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  1. ^ a b c d e f "NED Search Results for 3C 190". By Name | NASA/IPAC Extragalactic Database. Retrieved 15 November 2025.
  2. ^ Edge, D. O.; Shakeshaft, J. R.; McAdam, W. B.; Baldwin, J. E.; Archer, S. (1959). "A survey of radio sources at a frequency of 159 Mc/s". Memoirs of the Royal Astronomical Society. 68: 37–60. Bibcode:1959MmRAS..68...37E.
  3. ^ Wlerick, G.; Lelievre, G.; Veron, P. (March 1971). "Identification and Photometry of Radiosources of the Revised 3C Catalogue. I." Astronomy and Astrophysics. 11: 142. Bibcode:1971A&A....11..142W. ISSN 0004-6361.
  4. ^ Hirst, Paul; Jackson, Neal; Rawlings, Steve (December 2003). "Near-infrared spectroscopy of powerful compact steep-spectrum radio sources". Monthly Notices of the Royal Astronomical Society. 346 (3): 1009–1020. arXiv:astro-ph/0309055. Bibcode:2003MNRAS.346.1009H. doi:10.1111/j.1365-2966.2003.07155.x. ISSN 0035-8711.
  5. ^ a b Akujor, C. E.; Garrington, S. T. (September 1995). "Compact steep-spectrum sources - polarisation observations at 1.6, 4.9, 8.4 and 15 GHz". Astronomy and Astrophysics Supplement Series. 112: 235. ISSN 0365-0138.
  6. ^ Katz-Stone, D. M.; Rudnick, L. (10 April 1997). "A Spectral Analysis of Two Compact Steep-Spectrum Sources". The Astrophysical Journal. 479 (1): 258–267. Bibcode:1997ApJ...479..258K. doi:10.1086/303882. ISSN 0004-637X.
  7. ^ Nan, Rendong; Schilizzi, R. T.; Fanti, C.; Fanti, R. (December 1991). "VLBI observations of 24 3CR CSS radio sources at 50 cm". Astronomy and Astrophysics. 252: 513–527. Bibcode:1991A&A...252..513N. ISSN 0004-6361.
  8. ^ Spencer, R. E.; Schilizzi, R. T.; Fanti, C.; Fanti, R.; Parma, P.; van Breugel, W. J. M.; Venturi, T.; Muxlow, T. W. B.; Rendong, Nan (May 1991). "High-resolution observations of eight 3CR compact steep-spectrum radio sources". Monthly Notices of the Royal Astronomical Society. 250: 225–240. doi:10.1093/mnras/250.1.225. ISSN 0035-8711.
  9. ^ Stockton, Alan; Ridgway, Susan E. (June 2001). "The Host Galaxy and Environment of the z=1.195 Quasar 3C 190". The Astrophysical Journal. 554 (2): 1012–1020. arXiv:astro-ph/0102293. Bibcode:2001ApJ...554.1012S. doi:10.1086/321415. ISSN 0004-637X.
  10. ^ Podigachoski, P.; Barthel, P. D.; Haas, M.; Leipski, C.; Wilkes, B.; Kuraszkiewicz, J.; Westhues, C.; Willner, S. P.; Ashby, M. L. N.; Chini, R.; Clements, D. L.; Fazio, G. G.; Labiano, A.; Lawrence, C.; Meisenheimer, K. (1 March 2015). "Star formation in z > 1 3CR host galaxies as seen by Herschel" (PDF). Astronomy & Astrophysics. 575: A80. arXiv:1501.01434. Bibcode:2015A&A...575A..80P. doi:10.1051/0004-6361/201425137. ISSN 0004-6361.
  11. ^ Ishwara-Chandra, C. H.; Anantharamaiah, K. R.; Dwarakanath, K. S. (December 2002). "GMRT detection of HI absorption in the high-redshift red quasar 3C 190". Bulletin of the Astronomical Society of India. 30: 747–748. Bibcode:2002BASI...30..747I. ISSN 0304-9523.
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