Trio of interacting galaxies in the constellation Cancer
SDSS J0849+1114 (SDSS J084905.51+111447.2 ) is a late-stage galaxy merger forming from a trio of galaxies located in the constellation of Cancer . At the redshift of 0.077, they are located 1.06 billion light-years from Earth .[ 1] [ 2] First discovered as a triple active galactic nucleus (AGN) candidate in a Sloan Digital Sky Survey study published in 2011,[ 3] they received significant attention when astronomers discovered it harbors three supermassive black holes in its center.[ 4]
Characteristics
SDSS J0849+1114 is made up of three closely spaced interacting spiral galaxies , all showing signs of distortion. It has tidal tail features indicative of a late-stage merger .[ 2] [ 5] The nuclei in SDSS J0849+1114 are considered active and the galaxies classified as type 2 Seyferts according to long-slit spectroscopy observations from Apache Point Observatory .[ 6] [ 7] A study also mentions out of the triple AGN candidates studied, SDSS J0849+1114 is also the first known triple Seyfert nucleus.[ 8] In addition, they are classified as luminous infrared galaxies with luminosity of 8-1000 μm.[ 2]
According to a study published in 2022, the primary nucleus of SDSS J0849+1114 is more powerful compared to the secondary and tertiary nuclei. Further evidence also points out it has a double-sided jet with its orientation changing by 20 degrees , explaining the angular momentum of the black hole might be changed by a merger-enhanced accretion . The secondary nucleus shows absence of radio emission at all frequencies while the tertiary nucleus also has a two-sided jet but shown enlarging a radio lobe . Based on the internal energy of the lobe, it is estimated 5.0 × 1055 erg .[ 9] Furthermore, the three nuclei showed extended disc and budge components which the two showed signs of tidal stripping by the main nucleus.[ 8]
Supermassive black holes
The three supermassive black holes in SDSS J0849+1114 are found colliding together with a separation gap of only between 10,000 and 30,000 light-years.[ 10] All of them are surrounded by dusty structures and each of the black holes have a mass of ~1011.3 M ☉ , 106.4 M ☉ and 106.7 M ☉ respectively. According to Chandra and NuSTAR observations, one of the black holes showed large quantities of interstellar matter surrounding its torus .[ 4] It is estimated that the black holes from the merging galaxies will form a gravitationally bound triple black hole system within a few billion years.[ 8]
References
^ "Your NED Search Results" . ned.ipac.caltech.edu . Archived from the original on 2024-09-17. Retrieved 2024-09-17 .
^ a b c Pfeifle, Ryan W.; Satyapal, Shobita; Manzano-King, Christina; Cann, Jenna; Sexton, Remington O.; Rothberg, Barry; Canalizo, Gabriela; Ricci, Claudio; Blecha, Laura; Ellison, Sara L.; Gliozzi, Mario; Secrest, Nathan J.; Constantin, Anca; Harvey, Jenna B. (October 1, 2019). "A Triple AGN in a Mid-infrared Selected Late-stage Galaxy Merger" . The Astrophysical Journal . 883 (2): 167. arXiv :1908.01732 . Bibcode :2019ApJ...883..167P . doi :10.3847/1538-4357/ab3a9b . ISSN 0004-637X .
^ Liu, Xin; Shen, Yue; Strauss, Michael A.; Hao, Lei (2011-08-01). "Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. I. The Frequency on ~5-100 kpc Scales" . The Astrophysical Journal . 737 (2): 101. arXiv :1104.0950 . Bibcode :2011ApJ...737..101L . doi :10.1088/0004-637X/737/2/101 . ISSN 0004-637X . Archived from the original on 2023-11-15. Retrieved 2024-09-17 .
^ a b "Chandra :: Photo Album :: SDSS J0849+1114 :: September 25, 2019" . chandra.harvard.edu . Retrieved 2024-09-17 .
^ Pfeifle, Ryan W.; Satyapal, Shobita; Secrest, Nathan J.; Gliozzi, Mario; Ricci, Claudio; Ellison, Sara L.; Rothberg, Barry; Cann, Jenna; Blecha, Laura; Williams, James K.; Constantin, Anca (2019-04-20). "Buried Black Hole Growth in IR-selected Mergers: New Results from Chandra" . The Astrophysical Journal . 875 (2): 117. arXiv :1904.10955 . Bibcode :2019ApJ...875..117P . doi :10.3847/1538-4357/ab07bc . ISSN 0004-637X .
^ Gabányi, K. É; Frey, S.; Satyapal, S.; Constantin, A.; Pfeifle, R. W. (2019-10-01). "Very long baseline interferometry observation of the triple AGN candidate J0849+1114" . Astronomy & Astrophysics . 630 : L5. arXiv :1909.03259 . Bibcode :2019A&A...630L...5G . doi :10.1051/0004-6361/201936519 . ISSN 0004-6361 . Archived from the original on 2024-09-17. Retrieved 2024-09-17 .
^ Foord, Adi; Gültekin, Kayhan; Runnoe, Jessie C.; Koss, Michael J. (2021-02-01). "AGN Triality of Triple Mergers: Multiwavelength Classifications" . The Astrophysical Journal . 907 (2): 72. arXiv :2012.00769 . Bibcode :2021ApJ...907...72F . doi :10.3847/1538-4357/abce5e . ISSN 0004-637X .
^ a b c Liu, Xin; Hou, Meicun; Li, Zhiyuan; Nyland, Kristina; Guo, Hengxiao; Kong, Minzhi; Shen, Yue; Wrobel, Joan M.; Peng, Sijia (2019-12-10). "A Trio of Massive Black Holes Caught in the Act of Merging*" . The Astrophysical Journal . 887 (1): 90. arXiv :1907.10639 . Bibcode :2019ApJ...887...90L . doi :10.3847/1538-4357/ab54c3 . ISSN 0004-637X .
^ Peng, Sijia; Li, Zhiyuan; Liu, Xin; Nyland, Kristina; Wrobel, Joan M.; Hou, Meicun (July 27, 2022). "Very Large Array Multiband Radio Imaging of the Triple AGN Candidate SDSS J0849+1114" . The Astrophysical Journal . 934 (1): 89. arXiv :2206.14705 . Bibcode :2022ApJ...934...89P . doi :10.3847/1538-4357/ac7c18 . ISSN 0004-637X .
^ Mike Wall (2019-09-26). "Rare Discovery! 3 Monster Black Holes Are About to Collide" . Space.com . Archived from the original on 2024-09-17. Retrieved 2024-09-17 .
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