SDSS J1715+6008
| SDSS J1715+6008 | |
|---|---|
The Seyfert 2 galaxy SDSS J1715+6008. | |
| Observation data (J2000.0 epoch) | |
| Constellation | Draco |
| Right ascension | 17h 15m 44.02s[1] |
| Declination | +60° 08′ 35.50″[1] |
| Redshift | 0.156857[1] |
| Heliocentric radial velocity | 47,025 km/s ± 4[1] |
| Distance | 2.022 Gly |
| Apparent magnitude (V) | 18.66 |
| Apparent magnitude (B) | 19.51 |
| Characteristics | |
| Type | QSO2[1] |
| Size | ~137,600 ly (42.20 kpc) (estimated)[1] |
| Other designations | |
| 1715+6011, 5MUSES 305, NVSS J171543+600833, LEDA 3137164, 2MASS J17154401+6008352, SDSS J171544.02+600835.4, QFeedS J1715+6008[1] | |
SDSS J1715+6008 is an active Seyfert type 2 galaxy[2] located in the constellation of Draco. The redshift of the galaxy is (z) 0.156[1] and it was first discovered as an astronomical radio source from the Faint Images of the Radio Sky at Twenty-Centimeters survey by astronomers in 1997.[3] This galaxy is also known to host two active galactic nuclei (AGN) based on evidence of two X-ray sources, with a separation of 1.9 kiloparsecs from each other.[4][5][6]
Description
SDSS J1715+6008 is classified as both a radio-quiet (RQ) quasar and a doubly ionized oxygen (O II) emitter.[7][8] Its host appears to have an undisturbed appearance based on Sloan Digital Sky Survey imaging, without any prominent companions or tidal features. This is somewhat unusual despite the presence of two binary black holes, although there are signs of weakly disturbed features located within its central regions.[4][8] The black holes are estimated to have formed around 0.5 to 1 billion years ago and each has an estimated total mass of 7.2 × 1010 Mʘ.[8][9] The total [O II] luminosity of the black holes is approximately 3.6 × 1042 erg s−1.[9]
A study published in 2015 found interstellar gas in the form of a rotating disk which extends outwards by many kiloparsecs. The stellar line features are however in opposite directions, indicating bi-conical outflows.[8] In its optical spectrum SDSS J1715+6008 displays several emission lines, with one of the peaks described as blueshifted, with its [O ii] peaks mainly separated by around 350 kilometers per seconds.[4]
The radio structure of SDSS J1715+6008 is complex. Radio imaging made with the Very Large Array (VLA) has found there is a bright source in the center with extended radio emission. At 11.5 GHz frequencies the source is described as extended, with secondary peaks of emission located southwest from the nucleus, a resolved radio core and two flat spectrum regions. There is also a radio jet on one side. There is also evidence the ionized outflows are mainly driven by its own jet.[10]
References
- ^ a b c d e f g h "NED Search results for SDSS J1715+6008". NASA/IPAC Extragalactic Database. Retrieved 2025-12-20.
- ^ Smith, K. L.; Shields, G. A.; Salviander, S.; Stevens, A. C.; Rosario, D. J. (2012-05-25). "Double-Peaked Narrow-Line Active Galactic Nuclei. Ii. The Case of Equal Peaks". The Astrophysical Journal. 752 (1): 63. Bibcode:2012ApJ...752...63S. doi:10.1088/0004-637x/752/1/63. hdl:2152/35084. ISSN 0004-637X.
- ^ White, Richard L.; Becker, Robert H.; Helfand, David J.; Gregg, Michael D. (February 1997). "A Catalog of 1.4 GHz Radio Sources from the FIRST Survey". The Astrophysical Journal. 475 (2): 479–493. Bibcode:1997ApJ...475..479W. doi:10.1086/303564. ISSN 0004-637X.
- ^ a b c Comerford, Julia M.; Pooley, David; Gerke, Brian F.; Madejski, Greg M. (2011-07-22). "CHANDRA OBSERVATIONS OF A 1.9 kpc SEPARATION DOUBLE X-RAY SOURCE IN A CANDIDATE DUAL ACTIVE GALACTIC NUCLEUS GALAXY AT z = 0.16". The Astrophysical Journal. 737 (1): L19. arXiv:1106.0746. Bibcode:2011ApJ...737L..19C. doi:10.1088/2041-8205/737/1/l19. ISSN 2041-8205.
- ^ Rubinur, K; Das, M; Kharb, P (2019-02-04). "Searching for dual AGN in galaxies with double-peaked emission line spectra using radio observations". Monthly Notices of the Royal Astronomical Society. 484 (4): 4933–4950. arXiv:1902.00689. doi:10.1093/mnras/stz334. ISSN 0035-8711.
- ^ Satyapal, Shobita; Secrest, Nathan J.; Ricci, Claudio; Ellison, Sara L.; Rothberg, Barry; Blecha, Laura; Constantin, Anca; Gliozzi, Mario; McNulty, Paul; Ferguson, Jason (2017-10-20). "Buried AGNs in Advanced Mergers: Mid-infrared Color Selection as a Dual AGN Candidate Finder". The Astrophysical Journal. 848 (2): 126. arXiv:1707.03921. Bibcode:2017ApJ...848..126S. doi:10.3847/1538-4357/aa88ca. ISSN 0004-637X.
- ^ Jarvis, M E; Harrison, C M; Mainieri, V; Alexander, D M; Arrigoni Battaia, F; Calistro Rivera, G; Circosta, C; Costa, T; De Breuck, C; Edge, A C; Girdhar, A; Kakkad, D; Kharb, P; Lansbury, G B; Molyneux, S J (2021-03-05). "The quasar feedback survey: discovering hidden Radio-AGN and their connection to the host galaxy ionized gas". Monthly Notices of the Royal Astronomical Society. 503 (2): 1780–1797. arXiv:2103.00014. doi:10.1093/mnras/stab549. ISSN 0035-8711.
- ^ a b c d Villforth, Carolin; Hamann, Fred (2015-02-05). "THE HOST GALAXIES AND NARROW-LINE REGIONS OF FOUR DOUBLE-PEAKED [OIII] AGNs". The Astronomical Journal. 149 (3): 92. arXiv:1501.00325. Bibcode:2015AJ....149...92V. doi:10.1088/0004-6256/149/3/92. ISSN 1538-3881.
- ^ a b Wang, X.-W.; Zhou, H.-Y. (2012-09-11). "Dual Active Galactic Nuclei: Deprojecting the Binary Cores". The Astrophysical Journal. 757 (2): 124. Bibcode:2012ApJ...757..124W. doi:10.1088/0004-637x/757/2/124. ISSN 0004-637X.
- ^ Müller-Sánchez, F.; Comerford, J. M.; Nevin, R.; Barrows, R. S.; Cooper, M. C.; Greene, J. E. (2015-11-04). "THE ORIGIN OF DOUBLE-PEAKED NARROW LINES IN ACTIVE GALACTIC NUCLEI. I. VERY LARGE ARRAY DETECTIONS OF DUAL AGNs AND AGN OUTFLOWS". The Astrophysical Journal. 813 (2): 103. arXiv:1509.04291. Bibcode:2015ApJ...813..103M. doi:10.1088/0004-637x/813/2/103. ISSN 1538-4357.
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