3C 401

{{Short description|Radio galaxy in the constellation Draco}}

{{Infobox Galaxy

| name = 3C 401

| epoch = J2000

| type = G, FR II{{cite web|title=NED results for object 3C 401|url=http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=3C401&extend=no&hconst=73&omegam=0.27&omegav=0.73&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 |publisher=NASA/IPAC Extragalactic Database|access-date=29 March 2012}}

| ra = {{RA|19|40|25.1}}

| dec = {{DEC|+60|41|35}}

| dist_ly = {{convert|2.348|e9ly|Mpc|0|abbr=off|lk=on}}{{hub|0.73}}

| z = 0.201100

| appmag_v = 17.13

| constellation name = Draco

| notes =

| names = LEDA 2605547, 3C 401, 4C 60.29, 6C 193938+603431, 8C 1939+605

|image=File:3C 401.jpg|caption=3C 401 captured by SDSS}}

3C 401 is a powerful radio galaxy located in the constellation Draco. It is near the center of a rich cluster of galaxies and dominates the cluster. That is, it is the type-cD galaxy of its cluster. It has a double nucleus, indicating that it is merging with another galaxy.{{cite journal|last=Roche|first=Nathan|author2=Stephen A. Eales|title=Optical/ultraviolet morphology and alignment of low-redshift radio galaxies|journal=Monthly Notices of the Royal Astronomical Society|date=September 2000|volume=317|issue=1|pages=120–140|url=http://resolver.scholarsportal.info/resolve/00358711/v317i0001/120_omaaolrg|access-date=30 March 2012|bibcode = 2000MNRAS.317..120R |doi = 10.1046/j.1365-8711.2000.03684.x |doi-access=free}}

3C 401 is classified as a Fanaroff and Riley class II radio source (FR II), but has characteristics of both types of sources. FR II radio sources are brightest at the ends of their radio lobes while FR I sources are brightest toward their centers. 3C 401 has hot spots at the ends of its two extended radio lobes, but also has a bright one-sided jet like a FR I source.{{cite web|last=Leahy|first=J. P.|title=3CRR Atlas: 3C 401|url=http://www.jb.man.ac.uk/atlas/object/3C401.html|work=An Atlas of DRAGNs|publisher=Jodrell Bank Centre for Astrophysics|access-date=30 March 2012|author2=A. H. Bridle|author3=R. G. Strom|name-list-style=amp}} The spectra of this jet is also intermediate between the spectra of jets in the two types of sources.{{cite journal|last=Chiaberg|first=Marco|title=The Infrared-dominated Jet of 3C 401|journal=The Astrophysical Journal|date=August 10, 2005|volume=629|issue=1 |pages=100–107|doi=10.1086/431236|arxiv = astro-ph/0505034 |bibcode = 2005ApJ...629..100C |s2cid=39185781 |display-authors=etal}}