# 4C +72.26

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Radio galaxy in the constellation Draco

4C +72.26 4C +72.26 captured by Pan-STARRS Observation data (J2000.0 epoch) Constellation Draco Right ascension 19h 08m 23.90s Declination +72d 20m 04.90s Redshift 3.536000 Heliocentric radial velocity 1,060,066 km/s Distance 11.526 Gly (light travel time distance) Apparent magnitude (V) 0.436 Apparent magnitude (B) 0.577 Surface brightness 21.4 Characteristics Type HzRG Notable features Radio galaxy, interacting galaxy Other designations PGC 2821855, 6C 1909+72, NVSS J190823+722009, 8C J1908+722, WN B1909.1+7215, 2CXO J190823.2+722005, NAME TX J1908+7220

**4C +72.26** known as **NAME TX J1908+7220**, is a [radio galaxy](/source/Radio_galaxy) located in the constellation [Draco](/source/Draco_(constellation)). At the [redshift](/source/Redshift) of 3.53, the galaxy is located roughly 11.5 billion [light-years](/source/Light-year) from [Earth](/source/Earth).[1]

## Characteristics

4C +72.26 is one of the high redshift powerful radio galaxies.[2][3] An [interacting pair](/source/Interacting_galaxy) of two vigorous [starburst galaxies](/source/Starburst_galaxy) separated by ~1300 ± 200 km s−1 in [velocity](/source/Velocity),[4] 4C +72.26 is known to have tight locus following in the [K-band](/source/K-band_multi-object_spectrograph) [Hubble diagram](/source/Hubble's_law), suggesting it as a [luminous](/source/Luminous_efficacy) (~3*L**) galaxy with [stellar populations](/source/Stellar_population) forming rapidly at a very high redshift and such, evolved passively.[5]

4C +72.26 is a massive [galaxy](/source/Galaxy) lying inside the center of a [galaxy cluster](/source/Galaxy_cluster) where [galaxy formation](/source/Galaxy_formation_and_evolution) is regulated and through growth by heating the [intracluster medium](/source/Intracluster_medium). [Energy](/source/Energy) that is released from the continued [accretion](/source/Accretion_(astrophysics)) of material, is then fueled towards its central [supermassive black hole](/source/Supermassive_black_hole).[6][7]

The [molecular gas](/source/Atomic_and_molecular_astrophysics) is known to end up between two [colliding galaxies](/source/Colliding_galaxies)[8] which displays absorption line profiles like [P Cygni](/source/P_Cygni), while the [active galactic nucleus](/source/Active_galactic_nucleus) host shows Lyα emission that indicative of a galaxy-wide "[superwind](/source/Galactic_superwind)".[9][10] Moreover, the host is found to have a [luminous](/source/Luminous_efficacy) highly [ionized](/source/Ionization) outflow. Despite showing a strong massive starburst, the ultraviolet-mid-infrared [spectral energy distribution](/source/Spectral_energy_distribution) in 4C +72.26 is found to have a pre-existing [stellar population](/source/Stellar_population) that comprises ~1012 Msolar of [stellar mass](/source/Stellar_mass), with further ~2 per cent contributed by the current burst. This suggests that 4C +72.26 has assembled most of its final stellar mass.[4]

4C +72.26 is classfied as a broad [absorption-line](/source/Spectral_line) radio galaxy with strong mid-infrared continua observed through [spectrograph](/source/Spectrograph) observations from [Spitzer Telescope](/source/Spitzer_Space_Telescope),[11][12] according to research conducted by Dey in 1999,[13] similar to those of broad absorption-line quasars with C IV trough extending bluewards to ~7000 km s−1.[4]

With an upper [spectrum](/source/Spectrum) appearing similar to the [long-slit](/source/Long-slit_spectroscopy) spectrum that is presented,[14] the galaxy also have [wavelength](/source/Wavelength) coverage up to ~8400 Å. Besides the narrow [emission lines](/source/Spectral_line) of [Lyα](/source/Lyman-alpha) and [He II](/source/Helium-3), several deep broad absorption troughs are seen, with sharper [absorption](/source/Absorption_spectroscopy) features shortward of the predicted wavelengths that is O I1302 and C II1335 similar to [4C +41.17](/source/4C_%2B41.17)[15] and [NGC 1741](/source/NGC_1741), a star-forming galaxy.[16]

## References

1. **[^](#cite_ref-1)** ["Your NED Search Results"](https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=70844&objname=2&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1). *ned.ipac.caltech.edu*. Retrieved 2024-06-04.

1. **[^](#cite_ref-2)** Rocca-Volmerange, B.; Le Borgne, D.; De Breuck, C.; Fioc, M.; Moy, E. (2004-03-01). ["The radio galaxy K-z relation: The 1012 M⊙ mass limit. Masses of galaxies from the LK luminosity, up to z > 4"](https://ui.adsabs.harvard.edu/abs/2004A&A...415..931R). *Astronomy and Astrophysics*. **415**: 931–940. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0311490](https://arxiv.org/abs/astro-ph/0311490). [Bibcode](/source/Bibcode_(identifier)):[2004A&A...415..931R](https://ui.adsabs.harvard.edu/abs/2004A&A...415..931R). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20031717](https://doi.org/10.1051%2F0004-6361%3A20031717). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-3)** ["Distant Radio Galaxies and their Environments - G.K. Miley & C. De Breuck"](https://ned.ipac.caltech.edu/level5/Sept08/Miley/Miley9.html). *ned.ipac.caltech.edu*. Retrieved 2024-06-04.

1. ^ [***a***](#cite_ref-:0_4-0) [***b***](#cite_ref-:0_4-1) [***c***](#cite_ref-:0_4-2) Smith, D. J. B.; Simpson, C.; Swinbank, A. M.; Rawlings, S.; Jarvis, M. J. (2010). ["When galaxies collide: understanding the broad absorption-line radio galaxy 4C +72.26"](https://doi.org/10.1111%2Fj.1365-2966.2010.16279.x). *Monthly Notices of the Royal Astronomical Society*. **404** (3): 1089–1099. [arXiv](/source/ArXiv_(identifier)):[1001.2018](https://arxiv.org/abs/1001.2018). [Bibcode](/source/Bibcode_(identifier)):[2010MNRAS.404.1089S](https://ui.adsabs.harvard.edu/abs/2010MNRAS.404.1089S). [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2010.16279.x](https://doi.org/10.1111%2Fj.1365-2966.2010.16279.x).

1. **[^](#cite_ref-5)** Lilly, S. J.; Longair, M. S. (1982-06-01). ["Infrared studies of a sample of 3C radio galaxies"](https://doi.org/10.1093%2Fmnras%2F199.4.1053). *Monthly Notices of the Royal Astronomical Society*. **199** (4): 1053–1068. [Bibcode](/source/Bibcode_(identifier)):[1982MNRAS.199.1053L](https://ui.adsabs.harvard.edu/abs/1982MNRAS.199.1053L). [doi](/source/Doi_(identifier)):[10.1093/mnras/199.4.1053](https://doi.org/10.1093%2Fmnras%2F199.4.1053). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-6)** Nesvadba, N. P. H.; Lehnert, M. D.; Eisenhauer, F.; Gilbert, A.; Tecza, M.; Abuter, R. (2006-10-01). ["Extreme Gas Kinematics in the z=2.2 Powerful Radio Galaxy MRC 1138-262: Evidence for Efficient Active Galactic Nucleus Feedback in the Early Universe?"](https://ui.adsabs.harvard.edu/abs/2006ApJ...650..693N). *The Astrophysical Journal*. **650** (2): 693–705. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0606530](https://arxiv.org/abs/astro-ph/0606530). [Bibcode](/source/Bibcode_(identifier)):[2006ApJ...650..693N](https://ui.adsabs.harvard.edu/abs/2006ApJ...650..693N). [doi](/source/Doi_(identifier)):[10.1086/507266](https://doi.org/10.1086%2F507266). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-7)** Nesvadba, N. P. H.; Lehnert, M. D.; Breuck, C. De; Gilbert, A.; Breugel, W. van (2007-11-01). ["Compact radio sources and jet-driven AGN feedback in the early universe: constraints from integral-field spectroscopy"](https://www.aanda.org/articles/aa/abs/2007/43/aa8175-07/aa8175-07.html). *Astronomy & Astrophysics*. **475** (1): 145–153. [arXiv](/source/ArXiv_(identifier)):[0708.4150](https://arxiv.org/abs/0708.4150). [Bibcode](/source/Bibcode_(identifier)):[2007A&A...475..145N](https://ui.adsabs.harvard.edu/abs/2007A&A...475..145N). [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20078175](https://doi.org/10.1051%2F0004-6361%3A20078175). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-8)** Zhu, Ming; Gao, Yu; Seaquist, E. R.; Dunne, Loretta (2007-05-11). ["Gas and Dust in the Taffy Galaxies: UGC 12914/15"](https://iopscience.iop.org/article/10.1086/517996). *The Astronomical Journal*. **134** (1): 118–134. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0703200](https://arxiv.org/abs/astro-ph/0703200). [Bibcode](/source/Bibcode_(identifier)):[2007AJ....134..118Z](https://ui.adsabs.harvard.edu/abs/2007AJ....134..118Z). [doi](/source/Doi_(identifier)):[10.1086/517996](https://doi.org/10.1086%2F517996). [ISSN](/source/ISSN_(identifier)) [0004-6256](https://search.worldcat.org/issn/0004-6256).

1. **[^](#cite_ref-9)** Steidel, C. C.; Adelberger, K. L.; Shapley, A. E.; Pettini, M.; Dickinson, M.; Giavalisco, M. (2000-03-20). "Lyman Alpha Imaging of a Proto-Cluster Region at =3.09". *The Astrophysical Journal*. **532** (1): 170–182. [arXiv](/source/ArXiv_(identifier)):[astro-ph/9910144](https://arxiv.org/abs/astro-ph/9910144). [doi](/source/Doi_(identifier)):[10.1086/308568](https://doi.org/10.1086%2F308568). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-10)** Taniguchi, Yoshiaki; Shioya, Yasuhiro (2000-03-01). ["Superwind Model of Extended Lyα Emitters at High Redshift"](https://ui.adsabs.harvard.edu/abs/2000ApJ...532L..13T). *The Astrophysical Journal*. **532** (1): L13–L16. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0001522](https://arxiv.org/abs/astro-ph/0001522). [Bibcode](/source/Bibcode_(identifier)):[2000ApJ...532L..13T](https://ui.adsabs.harvard.edu/abs/2000ApJ...532L..13T). [doi](/source/Doi_(identifier)):[10.1086/312557](https://doi.org/10.1086%2F312557). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X). [PMID](/source/PMID_(identifier)) [10702121](https://pubmed.ncbi.nlm.nih.gov/10702121).

1. **[^](#cite_ref-11)** Seymour, N.; Ogle, P.; De Breuck, C.; Fazio, G. G.; Galametz, A.; Haas, M.; Lacy, M.; Sajina, A.; Stern, D.; Willner, S. P.; Vernet, J. (2008-07-01). ["Mid-Infrared Spectra of High-Redshift (z > 2) Radio Galaxies"](https://ui.adsabs.harvard.edu/abs/2008ApJ...681L...1S). *The Astrophysical Journal*. **681** (1): L1. [arXiv](/source/ArXiv_(identifier)):[0805.2143](https://arxiv.org/abs/0805.2143). [Bibcode](/source/Bibcode_(identifier)):[2008ApJ...681L...1S](https://ui.adsabs.harvard.edu/abs/2008ApJ...681L...1S). [doi](/source/Doi_(identifier)):[10.1086/590081](https://doi.org/10.1086%2F590081). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-12)** De Breuck, Carlos; Seymour, Nick; Stern, Daniel; Willner, S. P.; Eisenhardt, P. R. M.; Fazio, G. G.; Galametz, Audrey; Lacy, Mark; Rettura, Alessandro; Rocca-Volmerange, Brigitte; Vernet, Joël (2010-11-15). ["THE *SPITZER* HIGH-REDSHIFT RADIO GALAXY SURVEY"](https://iopscience.iop.org/article/10.1088/0004-637X/725/1/36). *The Astrophysical Journal*. **725** (1): 36–62. [arXiv](/source/ArXiv_(identifier)):[1010.1385](https://arxiv.org/abs/1010.1385). [Bibcode](/source/Bibcode_(identifier)):[2010ApJ...725...36D](https://ui.adsabs.harvard.edu/abs/2010ApJ...725...36D). [doi](/source/Doi_(identifier)):[10.1088/0004-637x/725/1/36](https://doi.org/10.1088%2F0004-637x%2F725%2F1%2F36). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-13)** Röttgering, H. J. A.; Best, P. N.; Lehnert, M. D. (1999-01-01). [*The Most Distant Radio Galaxies*](https://ui.adsabs.harvard.edu/abs/1999mdrg.conf.....R). [Bibcode](/source/Bibcode_(identifier)):[1999mdrg.conf.....R](https://ui.adsabs.harvard.edu/abs/1999mdrg.conf.....R).

1. **[^](#cite_ref-14)** Breuck, Carlos De; Breugel, Wil van; Röttgering, Huub; Stern, Daniel; Miley, George; Vries, Wim de; Stanford, S. A.; Kurk, Jaron; Overzier, Roderik (2001-03-01). ["Spectroscopy of Ultra-steep-Spectrum RadioSources"](https://iopscience.iop.org/article/10.1086/319392/meta). *The Astronomical Journal*. **121** (3): 1241. [arXiv](/source/ArXiv_(identifier)):[astro-ph/0012065](https://arxiv.org/abs/astro-ph/0012065). [Bibcode](/source/Bibcode_(identifier)):[2001AJ....121.1241D](https://ui.adsabs.harvard.edu/abs/2001AJ....121.1241D). [doi](/source/Doi_(identifier)):[10.1086/319392](https://doi.org/10.1086%2F319392). [ISSN](/source/ISSN_(identifier)) [1538-3881](https://search.worldcat.org/issn/1538-3881).

1. **[^](#cite_ref-15)** Dey, Arjun; van Breugel, Wil; Vacca, William D.; Antonucci, Robert (December 1997). ["Triggered Star Formation in a Massive Galaxy at*z*= 3.8: 4C 41.17"](https://iopscience.iop.org/article/10.1086/304911). *The Astrophysical Journal*. **490** (2): 698–709. [arXiv](/source/ArXiv_(identifier)):[astro-ph/9707166](https://arxiv.org/abs/astro-ph/9707166). [Bibcode](/source/Bibcode_(identifier)):[1997ApJ...490..698D](https://ui.adsabs.harvard.edu/abs/1997ApJ...490..698D). [doi](/source/Doi_(identifier)):[10.1086/304911](https://doi.org/10.1086%2F304911). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

1. **[^](#cite_ref-16)** Conti, Peter S.; Leitherer, Claus; Vacca, William D. (1996-04-01). ["Hubble Space Telescope Ultraviolet Spectroscopy of NGC 1741: A Nearby Template for Distant Energetic Starbursts"](https://ui.adsabs.harvard.edu/abs/1996ApJ...461L..87C). *The Astrophysical Journal*. **461**: L87. [arXiv](/source/ArXiv_(identifier)):[astro-ph/9602084](https://arxiv.org/abs/astro-ph/9602084). [Bibcode](/source/Bibcode_(identifier)):[1996ApJ...461L..87C](https://ui.adsabs.harvard.edu/abs/1996ApJ...461L..87C). [doi](/source/Doi_(identifier)):[10.1086/310005](https://doi.org/10.1086%2F310005). [ISSN](/source/ISSN_(identifier)) [0004-637X](https://search.worldcat.org/issn/0004-637X).

v t e Constellation of Draco List of stars in Draco Draco in Chinese astronomy Stars Bayer α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε (Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν (Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ1 (Dziban) ψ2 ω Flamsteed 4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68 Variable TW YY AG BY CL CM CX DO EK HP V581 HR 3751 4126 4934 5811 6237 6518 6618 (Alruba) 6817 7137 7783 HD 109246 (Funi) 101364 128717 147379 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 SDSS J1240+6710 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632 WISE 1841+7000 Exoplanets HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b Star clusters LAMOST 1 Nebulae Cat's Eye Nebula NGC 6742 Galaxies NGC 3147 3197 3735 4121 4125 4221 4236 4319 4331 4332 4363 4441 4513 4545 4589 5678 5777 5866 5866B 5879 5905 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789 Other 1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 4C 73.08 8C 1241+735 Abell 2218 BCG Bean galaxy Beaver galaxy BZQ J1727+5510 Draco Dwarf Draco II GB 1508+5714 Goldfish galaxy H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 IRAS 18580+6527 J120011.1+680924.8 KKR 25 Markarian 817 Markarian 876 Original TRG PGC 39058 Porphyrion QSO B1823+568 RGZ J172749.5+534647 S5 1803+784 S5 2007+777 SDSS J1715+6008 Tadpole Galaxy UGC 9391 UGC 9405 UGC 11241 UGC 11411 WISEA J145223.62+611707.5 WN B1851+5707 Galaxy clusters Abell 2218 CL1358+62 Draco Supercluster NGC 5866 Group Astronomical events SN 2003jb SN 2005B SN 2016aps Swift J1644+57 Category

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Adapted from the Wikipedia article [4C +72.26](https://en.wikipedia.org/wiki/4C_%2B72.26) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/4C_%2B72.26?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.