Article · Wikipedia archive · Last revised Jul 18, 2026

3C 236

3C 236 is the name used for this Fanaroff and Riley Class II radio galaxy. It is among the largest known radio galaxies; the radio structure has a total linear size in excess of 4.5 Mpc. The galaxy features a "double-double" radio morphology consisting of the giant relic 4.5 Mpc source and an inner 2 kpc compact steep spectrum radio source. A recent starburst episode near the nucleus may be related to the event resulting in re-ignition of radio activity.

Last revised
Jul 18, 2026
Read time
≈ 1 min
Length
304 w
Citations
15
Source
Wikipedia ↗
3C 236 North
3C 236, imaged by the Hubble Space Telescope, 10.8 arcseconds (") view
(NASA/STScI/WikiSky)
Observation data (J2000 epoch)
ConstellationLeo Minor
Right ascension10h 06m 01.7s1
Declination+34° 54′ 10″1
Redshift0.099358±0.0000201
Heliocentric radial velocity29,786.783215±5.995850 km/s1
Galactocentric velocity29,763±6 km/s1
Distance442.9 ± 31.0 Mpc (1,445 ± 101.1 Mly)h−1
0.6774
(Comoving)1
409.6 ± 0.09198 Mpc (1.33584 ± 0.0003 Gly)h−1
0.6774
(Light-travel)1
Apparent magnitude (V)16.357 (g)1
Apparent magnitude (B)15.972
Characteristics
TypeWLRG;LERG1
Size394,290 ly × 268,130 ly
(120.89 kpc × 82.21 kpc)
(diameter; 2MASS K-band total isophote)1
245,300 ly × 218,300 ly
(75.20 kpc × 66.93 kpc)
(diameter; SDSS D25.0 B-band isophote)a
Apparent size (V)0′.46 × 0′.381
Other designations
PGC 29329,1 LEDA 29329, 7C 1003+3508, 4C 35.22

3C 236 is the name used for this Fanaroff and Riley Class II (FR II) radio galaxy. It is among the largest known radio galaxies; the radio structure has a total linear size in excess of 4.5 Mpc (15 million light years). The galaxy features a "double-double" radio morphology consisting of the giant relic 4.5 Mpc source and an inner 2 kpc compact steep spectrum radio source. A recent starburst episode near the nucleus may be related to the event resulting in re-ignition of radio activity.3

Notes

Notes

  1. The quoted diameters in this infobox were based on NED's provided scale "Virgo + GA + Shapley" of 2.147 kpc/arcsec multiplied with given angular diameters.
References

References

  1. "NASA/IPAC Extragalactic Database". Results for 3C 236. Retrieved 2008-07-19.
  2. "SIMBAD query result".
  3. Tremblay, Grant R.; O'Dea, Christopher P.; Baum, Stefi A.; Koekemoer, Anton M.; Sparks, William B.; de Bruyn, Ger; Schoenmakers, Arno P. (April 2010), "Episodic Star Formation Coupled to Reignition of Radio Activity in 3C 236", The Astrophysical Journal, 715 (1): 172–185, arXiv:1004.0388, Bibcode:2010ApJ...715..172T, doi:10.1088/0004-637X/715/1/172, S2CID 119111278
  • Nature 250, 625 - 630 (23 August 1974)
  • Nature 257, 99 - 103 (11 September 1975)
External links