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 | E/Sy |
Size | ~130,000 ly (diameter) |
Apparent size (V) | 0.41 x 0.24 |
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]
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]
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 | E/Sy |
Size | ~130,000 ly (diameter) |
Apparent size (V) | 0.41 x 0.24 |
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]
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]