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CID-346

CID-346
SDSS image of CID-346
Observation data (J2000.0 epoch)
ConstellationSextans
Right ascension09h 59m 43.42s[1]
Declination+02° 07′ 07.15″[1]
Redshift2.2227000[1]
Heliocentric radial velocity667638 ± 20 km/s[1]
Distance10.372 Gly
magnitude (J)19.32[1]
Characteristics
TypeCandidate QSO[1]
Size~129,000 ly (39.7 kpc) (estimated)[1]
Other designations
C-COSMOS 00346, SDSS J095943.41+020707.4, COSMOS:[ECV2009] 00346[1]

CID-346 is a quasar located in the constellation of Sextans. The redshift of the object is (z) 2.22[1] and it was first discovered in a sample of X-ray active galactic nuclei (AGN) studied by the SINFONI Survey for Unveiling the Physics and Effect of Radiative feedback (SUPER) program in 2018. It is also classified as a broad-line AGN.[2]

Description

CID-346 is found to have a radio structure. When observed through radio imaging, it contains traces of radio emission with hints of an elongated structure located in the southeast direction from the emission region. An image of the source made with Very Large Array (VLA) at 1.4 GHz frequencies detected presence of knot features that extends up to 107 kiloparsecs towards southeast direction. The radio emission is described as extended, suggesting the source as restarted.[3] The total amount of star formation for this quasar is estimated at 362 ± 49 M☉ per year.[2][4]

A molecular halo has been found surrounding CID-346 reaching out to 200 kiloparsecs. When observed, it is found to have a central peak feature offset from the position of its active galactic nucleus and other secondary peak features that are located north, northeast and southeast from the nucleus.[5] There are also detections of hot molecular gas depicted as hot, that reaches a distance of around 16 kiloparsecs. Evidence also found most of the gas (60%) are situated within the active galactic nucleus with the rest of the gas are mainly located within in extended regions. There are also two satellite galaxies located within the position of the quasar.[6]

References

  1. ^ a b c d e f g h i "NED Search results for CID-346". NASA/IPAC Extragalactic Database. Retrieved 2026-03-21.
  2. ^ a b Circosta, C.; Mainieri, V.; Padovani, P.; Lanzuisi, G.; Salvato, M.; Harrison, C. M.; Kakkad, D.; Puglisi, A.; Vietri, G.; Zamorani, G.; Cicone, C.; Husemann, B.; Vignali, C.; Balmaverde, B.; Bischetti, M. (November 2018). "SUPER. I. Toward an unbiased study of ionized outflows in z ∼ 2 active galactic nuclei: survey overview and sample characterization". Astronomy and Astrophysics. 620: A82. doi:10.1051/0004-6361/201833520. ISSN 0004-6361.
  3. ^ Ilha, Gabriele S.; Harrison, C. M.; Mainieri, V.; Njeri, Ann; Bertola, E.; Bischetti, M.; Circosta, C.; Cicone, C.; Cresci, G. (2025-11-14), Connecting outflows with radio emission in active galactic nuclei at cosmic noon, arXiv, doi:10.48550/arXiv.2510.14152, arXiv:2510.14152, retrieved 2026-03-21
  4. ^ Circosta, C.; Mainieri, V.; Lamperti, I.; Padovani, P.; Bischetti, M.; Harrison, C. M.; Kakkad, D.; Zanella, A.; Vietri, G.; Lanzuisi, G.; Salvato, M.; Brusa, M.; Carniani, S.; Cicone, C.; Cresci, G. (February 2021). "SUPER. IV. CO(J = 3-2) properties of active galactic nucleus hosts at cosmic noon revealed by ALMA". Astronomy and Astrophysics. 646: A96. doi:10.1051/0004-6361/202039270. ISSN 0004-6361.
  5. ^ Cicone, C.; Mainieri, V.; Circosta, C.; Kakkad, D.; Vietri, G.; Perna, M.; Bischetti, M.; Carniani, S.; Cresci, G. (2021-09-24), SUPER. VI. A giant molecular halo around a z~2 quasar, arXiv, doi:10.48550/arXiv.2109.02269, arXiv:2109.02269, retrieved 2026-03-21
  6. ^ Kakkad, D.; Mainieri, V.; Tanaka, Takumi S.; Silverman, John D.; Law, D.; Riffel, Rogemar A.; Circosta, C.; Bertola, E.; Bianchin, M. (2025-07-07), JWST MIRI/MRS observations of hot molecular gas in an AGN host galaxy at Cosmic Noon, arXiv, doi:10.48550/arXiv.2507.05354, arXiv:2507.05354, retrieved 2026-03-21

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