4C +72.26

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4C +72.26
4C +72.26 captured by Pan-STARRS
Observation data (J2000.0 epoch)
ConstellationDraco
Right ascension19h 08m 23.90s
Declination+72d 20m 04.90s
Redshift3.536000
Heliocentric radial velocity1,060,066 km/s
Distance11.526 Gly (light travel time distance)
Apparent magnitude (V)0.436
Apparent magnitude (B)0.577
Surface brightness21.4
Characteristics
TypeHzRG
Notable featuresRadio 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 located in the constellation Draco. At the redshift of 3.53, the galaxy is located roughly 11.5 billion light-years from Earth.[1]

Characteristics[edit]

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

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

The molecular gas is known to end up between two colliding galaxies[8] which displays absorption line profiles like P Cygni, while the active galactic nucleus host shows Lyα emission that indicative of a galaxy-wide ‘superwind’.[9][10] Moreover, the host is found to have a luminous highly ionized outflow. Despite showing a strong massive starburst, the ultraviolet-mid-infrared spectral energy distribution in 4C +72.26 is found to have a pre-existing stellar population that comprises ~1012 Msolar of 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 radio galaxy with strong mid-infrared continua observed through spectrograph observations from Spitzer 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 appearing similar to the long-slit spectrum that is presented,[14] the galaxy also have wavelength coverage up to ∼8400 Å. Besides the narrow emission lines of Lyα and He II, several deep broad absorption troughs are seen, with sharper absorption features shortward of the predicted wavelengths that is O I1302 and C II1335 similar to 4C +41.17[15] and NGC 1741, a star-forming galaxy.[16]

References[edit]

  1. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-06-04.
  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". Astronomy and Astrophysics. 415: 931–940. doi:10.1051/0004-6361:20031717. ISSN 0004-6361.
  3. ^ "Distant Radio Galaxies and their Environments - G.K. Miley & C. De Breuck". ned.ipac.caltech.edu. Retrieved 2024-06-04.
  4. ^ a b c Smith, D. J. B.; Simpson, C.; Swinbank, A. M.; Rawlings, S.; Jarvis, M. J. "When galaxies collide: understanding the broad absorption-line radio galaxy 4C +72.26". academic.oup.com. Retrieved 2024-06-04.
  5. ^ Lilly, S. J.; Longair, M. S. (1982-06-01). "Infrared studies of a sample of 3C radio galaxies". Monthly Notices of the Royal Astronomical Society. 199: 1053–1068. doi:10.1093/mnras/199.4.1053. ISSN 0035-8711.
  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?". The Astrophysical Journal. 650: 693–705. doi:10.1086/507266. ISSN 0004-637X.
  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". Astronomy & Astrophysics. 475 (1): 145–153. doi:10.1051/0004-6361:20078175. ISSN 0004-6361.
  8. ^ Zhu, Ming; Gao, Yu; Seaquist, E. R.; Dunne, Loretta (2007-05-11). "Gas and Dust in the Taffy Galaxies: UGC 12914/15". The Astronomical Journal. 134 (1): 118–134. doi:10.1086/517996. ISSN 0004-6256.
  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. doi:10.1086/308568. ISSN 0004-637X. {{cite journal}}: Missing pipe in: |title= (help)
  10. ^ Taniguchi, Yoshiaki; Shioya, Yasuhiro (2000-03-01). "Superwind Model of Extended Lyα Emitters at High Redshift". The Astrophysical Journal. 532: L13–L16. doi:10.1086/312557. ISSN 0004-637X.
  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". The Astrophysical Journal. 681: L1. doi:10.1086/590081. ISSN 0004-637X.
  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). "THESPITZERHIGH-REDSHIFT RADIO GALAXY SURVEY". The Astrophysical Journal. 725 (1): 36–62. doi:10.1088/0004-637x/725/1/36. ISSN 0004-637X.
  13. ^ Röttgering, H. J. A.; Best, P. N.; Lehnert, M. D. (1999-01-01). The Most Distant Radio Galaxies.
  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". The Astronomical Journal. 121 (3): 1241. doi:10.1086/319392. ISSN 1538-3881.
  15. ^ Dey, Arjun; van Breugel, Wil; Vacca, William D.; Antonucci, Robert (1997-12). "Triggered Star Formation in a Massive Galaxy atz= 3.8: 4C 41.17". The Astrophysical Journal. 490 (2): 698–709. doi:10.1086/304911. ISSN 0004-637X. {{cite journal}}: Check date values in: |date= (help)
  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". The Astrophysical Journal. 461: L87. doi:10.1086/310005. ISSN 0004-637X.
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