SDSS J1430+2303
| SDSS J1430+2303 | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 30m 16.04s |
| Declination | +23° 03′ 44.5″ |
| Redshift | 0.08105 |
| Distance | 339 Mpc (1.11 Gly) |
| Characteristics | |
| Type | Sy |
| Other designations | |
| PGC 214276, SDSS J143016.05+230344.4, 2MASS J14301603+2303445 | |
SDSS J1430+2303 (or SDSS J143016.05+230344.4) is a galaxy with an active galactic nucleus that has been claimed to be undergoing a periodic brightness variability that is speeding up. One explanation for the purported behavior is that it could be a supermassive black hole binary. Initial trajectory models suggested the pair could be merging either before the end of 2022 or, alternatively, no later than 2025.[1][2]
The original claim of periodic variations was made in January 2022 in an unrefereed preprint, posted to the ArXiv server, that has not yet been published in a refereed journal as of early 2023. The discovery team later published X-ray observations of the object, finding evidence of strong X-ray variability on timescales of a few days.[3] However, subsequent follow-up observations by two independent groups did not find evidence of continued periodic brightness variations, casting doubt on the binary black hole hypothesis.[4][5]
Galaxy
SDSS J1430+2303 is a Seyfert 1 galaxy, an elliptical galaxy with a mass of 150 billion solar masses.[2]
SDSS J1430+2303 is 1.05 × 1022 km from Earth (or 1.11 billion light years, 339 Mpc) with a redshift of 0.08105.[2]
It has an Hα line emission, blue-shifted by 2400 km/s, relative to other emission lines from the galaxy.[2]
An estimate of a supermassive black hole at its center is 40 million solar masses.[2]
References
- ^ Clery, Daniel (1 February 2022). "Crash of the titans: imminent merger of giant black holes predicted". www.science.org. 375 (6580).
- ^ a b c d e Jiang, Ning; Yang, Huan; Wang, Tinggui; Zhu, Jiazheng; Lyu, Zhenwei; Dou, Liming; Wang, Yibo; Wang, Jianguo; Pan, Zhen; Liu, Hui; Shu, Xinwen; Zheng, Zhenya (27 January 2022). "Tick-Tock: The Imminent Merger of a Supermassive Black Hole Binary". arXiv:2201.11633 [astro-ph.HE].
- ^ Dou, Liming; Jiang, Ning; Wang, Tinggui; Shu, Xinwen; Yang, Huan; Pan, Zhen; Zhu, Jiazheng; Tao, An; Zheng, Zhen-Ya; Yanli, Ai (9 September 2022). "X-ray view of a merging supermassive black hole binary candidate SDSS J1430+2303: Results from the first ~200 days of observations". Astronomy & Astrophysics. 665 (September 2022): 7. arXiv:2208.11968. Bibcode:2022A&A...665L...3D. doi:10.1051/0004-6361/202244450. S2CID 251800063. Retrieved 16 September 2022.
- ^ Dotti, Massimo; Bonetti, Matteo; Rigamonti, Fabio; Bortolas, Elisa; Fossati, Matteo; Decarli, Roberto; Covino, Stefano; Lupi, Alessandro; Franchini, Alessia; Sesana, Alberto; Calderone, Giorgio (January 2023). "Optical follow-up of the tick-tock massive black hole binary candidate". Monthly Notices of the Royal Astronomical Society. 518 (3): 4172–4179. arXiv:2205.06275. Bibcode:2023MNRAS.518.4172D. doi:10.1093/mnras/stac3344.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Masterson, Megan; Kara, Erin; Pasham, Dheeraj; D'Orazio, Daniel; Walton, Dominic; Fabian, Andrew; Lucchini, Matteo; Remillard, Ronald; Arzoumanian, Zaven; Burhkonov, Otabek; Choi, Hyeonho; Ehgamberdiev, Shurat; Ferrara, Elizabeth; Guolo, Muryel; Im, Myungshin; Kim, Yonggi; Mirzaqulov, Davron; Paek, Gregory; Sung, Hyun-Il; Yoon, Joh-Na (14 March 2023). "Unusual Hard X-Ray Flares Caught in NICER Monitoring of the Binary Supermassive Black Hole Candidate AT2019cuk/Tick Tock/SDSS J1430+2303". The Astrophysical Journal Letters. 945 (2): L34. Bibcode:2023ApJ...945L..34M. doi:10.3847/2041-8213/acbea9. hdl:2299/26129. S2CID 257220283.
