7C 1354+2552

7C 1354+2552
SDSS image of quasar 7C 1354+2552
Observation data (J2000.0 epoch)
ConstellationBoötes
Right ascension13h 57m 06.45s[1]
Declination+25° 37′ 28.95″[1]
Redshift2.032000[1]
Heliocentric radial velocity609,178 km/s[1]
Distance10.097 Gly
Apparent magnitude (V)18.93
Apparent magnitude (B)19.13
Characteristics
TypeQSO
Other designations
B2 1354+25, PKS 1354+258, NVSS J135706+253726, Cul 1354+258, PKS J1357+2537, TXS 1354+258[1]

7C 1354+2552 is a distant radio-loud quasar[2][3] located in the constellation of Boötes. It has a redshift of (z) 2.032[1] and it was first discovered by astronomers in 1967 who were conducting a continuum survey using a radio telescope from the Ohio State University, designated as OP 291.[4]

Description

7C 1354+2552 has a compact radio structure. It displays two radio jets perpendicular to each other, with the north to south jet having a length of 86 kiloparsecs while the jet on the east to west side has a measured length of 24 kiloparsecs.[5] There is an easternmost component located in one of those jets based on Very Large Array (VLA) observations.[6] The quasar also has two outer hotspots which in turn are orientated in the position angle of 17°.[7]

The host galaxy of 7C 1354+2552 is classified as disk galaxy with a star formation rate of 29 ± 3 Mʘ per year based on a hydrogen alpha emission line luminosity.[8][9] Further observations on the modelling of its rotating disk, found there is a blueshifted component located south-east and a redshifted component located north-west with full-width at half maximum measurements of 357.2 ± 2.0 km s−1 and 497.7 ± 6.5 km s−1 respectively.[8][10] There is also a nearby companion galaxy located south-east clearly detected in emission lines.[8]

7C 1354+2552 is surrounded by a Lyman-alpha emission nebula. It is asymmetric, with most of the radio emission found to originate both east and south of the quasar.[7] In addition, it displays an ionized outflow on spatial scales of 1 kiloparsec with detections of molecular gas emission towards the northeast.[5] A molecular gas inflow rate for 7C 1354+2552 was calculated as 200 Mʘ per year with velocity of 180 kilometers per seconds.[8] Two absorption lines of doubly ionized nitrogen and triply ionized silicon are identified in the quasar's spectra.[3] In 1999 VLA detected emission from the quasar, with its 4 GHz peak flux reaching 173.68 mJy.[11]

References

  1. ^ a b c d e f "NED search results for 7C 1354+2552". NASA/IPAC Extragalactic Database. Retrieved 2025-06-15.
  2. ^ Vayner, Andrey; Wright, Shelley A.; Murray, Norman; Armus, Lee; Boehle, Anna; Cosens, Maren; Larkin, James E.; Mieda, Etsuko; Walth, Gregory (2021-10-01). "A Spatially Resolved Survey of Distant Quasar Host Galaxies. I. Dynamics of Galactic Outflows". The Astrophysical Journal. 919 (2): 122. arXiv:2106.08337. Bibcode:2021ApJ...919..122V. doi:10.3847/1538-4357/ac0f56. ISSN 0004-637X.
  3. ^ a b Roche, Nathan; Humphrey, Andrew; Binette, Luc (2014-10-01). "Spectroscopy of 7 radio-loud QSOs at 2 < z < 6: giant Lyman α emission nebulae accreting on to host galaxies". Monthly Notices of the Royal Astronomical Society. 443 (4): 3795–3808. arXiv:1407.4046. doi:10.1093/mnras/stu1430. ISSN 0035-8711.
  4. ^ Scheer, D. J.; Kraus, J. D. (May 1967). "A High-Sensivity Survey of the North Galactic Polar Region at 1415 MHz". The Astronomical Journal. 72: 536–543. Bibcode:1967AJ.....72..536S. doi:10.1086/110263. ISSN 0004-6256.
  5. ^ a b Vayner, Andrey; Zakamska, Nadia; Wright, Shelley A.; Armus, Lee; Murray, Norman; Walth, Gregory (2021-12-01). "Multiphase Outflows in High-redshift Quasar Host Galaxies". The Astrophysical Journal. 923 (1): 59. arXiv:2110.00019. Bibcode:2021ApJ...923...59V. doi:10.3847/1538-4357/ac2b9e. ISSN 0004-637X.
  6. ^ Barthel, P. D.; Miley, G. K.; Schilizzi, R. T.; Lonsdale, C. J. (June 1988). "Observations of the large scale radio structure in high redshift quasars". Astronomy and Astrophysics Supplement Series. 73: 515–547. ISSN 0365-0138.
  7. ^ a b Heckman, Timothy M.; Lehnert, Matthew D.; van Breugel, Wil; Miley, George K. (March 1991). "Spatially Resolved Optical Images of High-Redshift Quasi-stellar Objects". The Astrophysical Journal. 370: 78. Bibcode:1991ApJ...370...78H. doi:10.1086/169794. ISSN 0004-637X.
  8. ^ a b c d Vayner, Andrey; Zakamska, Nadia L; Sabhlok, Sanchit; Wright, Shelley A; Armus, Lee; Murray, Norman; Walth, Gregory; Ishikawa, Yuzo (2023-02-11). "Cold mode gas accretion on two galaxy groups at z ∼ 2". Monthly Notices of the Royal Astronomical Society. 519 (1): 961–979. arXiv:2212.00152. doi:10.1093/mnras/stac3537. ISSN 0035-8711.
  9. ^ Vayner, Andrey; Wright, Shelley A.; Murray, Norman; Armus, Lee; Boehle, Anna; Cosens, Maren; Larkin, James E.; Mieda, Etsuko; Walth, Gregory (October 2021). "A Spatially Resolved Survey of Distant Quasar Host Galaxies. I. Dynamics of Galactic Outflows". The Astrophysical Journal. 919 (2): 122. arXiv:2106.08337. Bibcode:2021ApJ...919..122V. doi:10.3847/1538-4357/ac0f56. ISSN 0004-637X.
  10. ^ Vayner, Andrey; Wright, Shelley A.; Murray, Norman; Armus, Lee; Boehle, Anna; Cosens, Maren; Larkin, James E.; Mieda, Etsuko; Walth, Gregory (2021-03-01). "A Spatially Resolved Survey of Distant Quasar Host Galaxies. II. Photoionization and Kinematics of the ISM". The Astrophysical Journal. 910 (1): 44. arXiv:2101.08291. Bibcode:2021ApJ...910...44V. doi:10.3847/1538-4357/abddc1. ISSN 0004-637X.
  11. ^ Wadadekar, Yogesh; Kembhavi, Ajit (1999-06-25), "A Study of Quasar Radio Emission from the VLA FIRST Survey", The Astronomical Journal, 118 (4): 1435–1443, arXiv:astro-ph/9906408, Bibcode:1999AJ....118.1435W, doi:10.1086/301046, arXiv:astro-ph/9906408
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