3C 236

{{Short description|Galaxy in the constellation Leo Minor}}

{{Infobox Galaxy

| name = 3C 236 North

| image = 3C236 Hubble.jpg

| image_size = 250

| caption = 3C 236, imaged by the Hubble Space Telescope, 10.8 arcseconds (") view
(NASA/STScI/WikiSky)

| epoch = J2000

| constellation name = Leo Minor

| ra = {{RA|10|06|01.7}}

| dec = {{DEC|+34|54|10}}

| z = {{val|0.099358|0.000020}}

| h_radial_v = {{val|29786.783215|5.995850|ul=km/s|fmt=commas}}

| gal_v = {{val|29763|6|ul=km/s|fmt=commas}}

| dist_ly = {{convert|442.9|+/-|31.0|Mpc|Mly|sigfig=4|abbr=on|lk=on}}{{hub|0.6774}}
{{small|(Comoving)}}

{{convert|1.33584|+/-|0.0003|Gly|Mpc|sigfig=4|abbr=on|lk=on|order=flip}}{{hub|0.6774}}
{{small|(Light-travel)}}

| appmag_b = 15.97{{cite web | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=3C%20236&Name=3C%20236&Radius=submit%3Dsubmit | title=SIMBAD query result }}

| appmag_v = 16.357 (g)

| type = WLRG;LERG{{cite web | title=NASA/IPAC Extragalactic Database | work=Results for 3C 236 | url=https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=PGC+29329&extend=no&hconst=67.74&omegam=0.3089&omegav=0.6911&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES | access-date=2008-07-19}}

| mass =

| size = {{cvt|120.89|x|82.21|kpc|ly|sigfig=5|abbr=on|lk=on|disp=x|
(|)|order=flip}}
{{small|(diameter; 2MASS K-band total isophote)}}

{{cvt|75.20|x|66.93|kpc|ly|sigfig=4|abbr=on|lk=on|disp=x|
(|)|order=flip}}
{{small|(diameter; SDSS D_25.0 B-band isophote)}}{{efn|name=Size|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.}}

| size_v = 0{{prime}}.46 × 0{{prime}}.38

| notes =

| names = PGC 29329, 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.{{citation

| url = http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1004.0388

| title = Episodic Star Formation Coupled to Reignition of Radio Activity in 3C 236

| author = Tremblay, Grant R.

| author2 = O'Dea, Christopher P.

| author3 = Baum, Stefi A.

| author4 = Koekemoer, Anton M.

| author5 = Sparks, William B.

| author6 = de Bruyn, Ger

| author7 = Schoenmakers, Arno P.

| date = April 2010

| journal = The Astrophysical Journal

| volume = 715

| issue = 1

| pages = 172–185

| doi = 10.1088/0004-637X/715/1/172

|bibcode = 2010ApJ...715..172T |arxiv = 1004.0388 | s2cid = 119111278

}}