{{Short description|Radio galaxy in the constellation Draco}} {{Infobox galaxy|name=[[Fourth Cambridge Survey|4C]] 73.08|caption=[[Hubble Space Telescope|HST]] image of 4C 73.08. Also in the image are galaxies; LEDA 2754266 & LEDA 2754392|epoch=[[J2000]]|constellation name=[[Draco (constellation)|Draco]]|ra={{RA|09|49|45.94}}<ref name="ned" />|dec={{DEC|+73|14|23.00}}<ref name="ned" />|z=0.047280<ref name="ned" />|image=File:Galactic fireflies (8178676984).jpg|h_radial_v=14,174 ± 878 [[kilometer per second|km/s]]<ref name="ned" />|dist_ly={{convert|211.44 ± 2355|Mpc|Mly|abbr=on|lk=on|order=flip}}<ref name="ned" />|mag_j=12.95<ref name="ned" />|type=FR II NLRG<ref name="ned" />|size=~{{convert|52.0|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{r|ned}}|names=[[2MASX]] J09494596+7314232, [[Principal Galaxies Catalogue|PGC]] 28261, VII Zw 292, [[Eighth Cambridge Survey|8C]] 0944+734, PBC J0950.0+7315, IVS B0945+734<ref name="ned" />}}
'''4C 73.08''' is a [[Fanaroff–Riley classification|Fanaroff-Riley]] Class Type II [[radio galaxy]]<ref name=":0">{{Cite web |last=information@eso.org |title=Galactic fireflies |url=https://www.esahubble.org/images/potw1246a/ |access-date=2026-03-29 |website=www.esahubble.org |language=en}}</ref> located in the constellation of [[Draco (constellation)|Draco]]. The [[redshift]] of the galaxy is (z) 0.047<ref name="ned">{{Cite web |title=NED Search results for 4C 73.08 |url=https://ned.ipac.caltech.edu/byname?objname=4C+73.08&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2026-03-29 |website=NASA/IPAC Extragalactic Database}}</ref> and it was first discovered by U. Stute in 1981.<ref>{{Cite journal |last=Stute |first=U. |date=1981 |title=Die große Radiogalaxie 4C73.08 |url=https://articles.adsabs.harvard.edu/full/1981MitAG..52..150S |journal=Mitteilungen der Astronomischen Gesellschaft Hamburg |language=en |volume=52 |pages=150 |bibcode=1981MitAG..52..150S |issn=0374-1958}}</ref> This object has also been said to be classified as a giant radio galaxy. It is also the [[brightest cluster galaxy]] of a small [[galaxy group]].<ref name=":1">{{Cite journal |last1=Klein |first1=U. |last2=Mack |first2=K. H. |last3=Strom |first3=R. |last4=Wielebinski |first4=R. |last5=Achatz |first5=U. |date=March 1994 |title=A high-frequency radio continuum investigation of giant radio galaxies. I. Observations of six objects at 2.8 CM wavelength. |url=https://articles.adsabs.harvard.edu/pdf/1994A%26A...283..729K |journal=Astronomy and Astrophysics |language=en |volume=283 |pages=729–744 |bibcode=1994A&A...283..729K |issn=0004-6361}}</ref><ref>{{Cite journal |last1=Chen |first1=R. |last2=Peng |first2=B. |last3=Strom |first3=R. G. |last4=Wei |first4=J. |date=June 2012 |title=Group of galaxies around the giant radio galaxy 4C 73.08 |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=422 |issue=4 |pages=3004–3009 |doi=10.1111/j.1365-2966.2012.20781.x |doi-access=free |bibcode=2012MNRAS.422.3004C |issn=0035-8711}}</ref>
== Description == 4C 73.08 is hosted by an [[elliptical galaxy]].<ref name=":0" /> When observed, the radio source of the galaxy is found compact, with known protrusion features extending outwards from both of the [[Radio galaxy|radio lobes]]. The lobes are also connected together by bridges of [[Radio wave|radio emission]]. There are also strong detections of radio [[Polarization (waves)|polarization]] located at both north and south protrusion extensions of the lobes.<ref name=":1" /> The total [[Linear extension|linear extent]] of the source is estimated to be 1.7 [[Parsec|megaparsecs]].<ref>{{Cite journal |last1=Saripalli |first1=L. |last2=Patnaik |first2=A. R. |last3=Porcas |first3=R. W. |last4=Graham |first4=D. A. |date=December 1997 |title=Nuclear radio emission in megaparsec-size radio galaxies |url=https://articles.adsabs.harvard.edu/pdf/1997A%26A...328...78S |journal=Astronomy and Astrophysics |language=en |volume=328 |pages=78–82 |bibcode=1997A&A...328...78S |issn=0004-6361}}</ref> A compact radio core is clearly detected based on radio imaging.<ref>{{Cite journal |last1=Evans |first1=Daniel A. |last2=Hardcastle |first2=Martin J. |last3=Lee |first3=Julia C. |last4=Kraft |first4=Ralph P. |last5=Worrall |first5=Diana M. |last6=Birkinshaw |first6=Mark |last7=Croston |first7=Judith H. |date=2008-08-04 |title=XMM-Newton Observations of the Nuclei of the Radio Galaxies 3C 305, DA 240, and 4C 73.08 |journal=The Astrophysical Journal |volume=688 |issue=2 |page=844 |doi=10.1086/592266 |arxiv=0808.0455v1 |bibcode=2008ApJ...688..844E |language=en}}</ref>
New radio observations in 2013 would find 4C 73.08 has a double-lobed structure that is found to contain several components. The hotspot located in the southern component is the brightest known feature while the hotspot in the northern lobe is fainter and also located centrally. Wing-like features are also exhibited by both lobes with ridgelines running in [[perpendicular]] [[Direction finding|direction]] towards the position of the [[Semi-major and semi-minor axes|major axis]] and curving away from the nucleus's direction. The radio core contains a flat [[radio spectrum]].<ref name=":2">{{Cite journal |last1=Strom |first1=R. G. |last2=Chen |first2=R. |last3=Yang |first3=J. |last4=Peng |first4=B. |date=2013-02-04 |title=Structure and environment of the giant radio galaxy 4C 73.08 |url=https://academic.oup.com/mnras/article/430/3/2090/980917#25981421 |journal=Monthly Notices of the Royal Astronomical Society |volume=430 |issue=3 |pages=2090–2096 |doi=10.1093/mnras/stt033 |doi-access=free |issn=1365-2966}}</ref>
A [[Astrophysical jet|radio jet]] initially thought as one-sided, is shown to have a symmetrical appearance.<ref name=":2" /> The lobes of the source are surrounded by radio emission on [[Parsec|megaparsec]] scales.<ref>{{Cite journal |last1=Bruni |first1=G |last2=Panessa |first2=F |last3=Bassani |first3=L |last4=Dallacasa |first4=D |last5=Venturi |first5=T |last6=Saripalli |first6=L |last7=Brienza |first7=M |last8=Hernández-García |first8=L |last9=Chiaraluce |first9=E |last10=Ursini |first10=F |last11=Bazzano |first11=A |last12=Malizia |first12=A |last13=Ubertini |first13=P |date=2020-03-19 |title=Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity |url=https://academic.oup.com/mnras/article/494/1/902/5809979 |journal=Monthly Notices of the Royal Astronomical Society |volume=494 |issue=1 |pages=902–914 |doi=10.1093/mnras/staa735 |doi-access=free |issn=0035-8711|arxiv=2003.09183 }}</ref> Studies also found 4C 73.08 is classified as a narrow-line radio galaxy.<ref>{{Cite journal |last1=Ramírez |first1=E. A. |last2=Tadhunter |first2=C. N. |last3=Dicken |first3=D. |last4=Rose |first4=M. |last5=Axon |first5=D. |last6=Sparks |first6=W. |last7=Packham |first7=C. |date=2014-02-07 |title=Hubble Space Telescope and Spitzer point-source detection and optical extinction in powerful narrow-line radio galaxies |url=https://academic.oup.com/mnras/article/439/2/1270/1004253 |journal=Monthly Notices of the Royal Astronomical Society |volume=439 |issue=2 |pages=1270–1285 |doi=10.1093/mnras/stt2444 |doi-access=free |issn=0035-8711|arxiv=1401.1223 }}</ref>
== References == <references />
== External links == {{WikiSky}}
{{Draco (constellation)}} [[Category:Radio galaxies]] [[Category:Draco (constellation)]] [[Category:Active galaxies]] [[Category:Elliptical galaxies]] [[Category:4C objects|73.08]] [[Category:Principal Galaxies Catalogue objects|028261]] [[Category:Astronomical objects discovered in 1981]]