TXS 0033+252
| TXS 0033+252 | |
|---|---|
DESI Legacy DR9 image of TXS 0033+252 | |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 00h 36m 15.692s |
| Declination | +25° 33' 29.99" |
| Redshift | 0.62542 |
| Distance | 5.936 bly (1,820 mpc) |
| Characteristics | |
| Mass | 195.21 billion M☉ |
| Size | 48,700 ly (14,940 pc) |
| Other designations | |
| TXS 0033+252, NVSS J003616+253332, ILT J003621.03+253500.9 | |
TXS 0033+252 also known as NVSS J003616+253332, is a radio galaxy located in the constellation of Andromeda.[1] The galaxy is approximately 5.94 billion light years (1,820 megaparsecs) away and has an apparent Z magnitude of 19.4.[2][3] It was discovered in 1987 by the Green Bank Telescope in the 87GB survey of radio sources.[4] As of 2024, TXS 0033+252 is the largest known radio galaxy with an extent of 8 megaparsecs.[3]
Physical properties
The galaxy is a small, medium-mass galaxy that is not associated with any galaxy clusters, classifying it as a field galaxy.[1] It has a diameter of 48,700 light years (14.94 kiloparsecs) based on a distance of 5.94 billion light years (1,820 megaparsecs) and an angular diameter of 1.693 arcsecs. It also has an estimated stellar mass of 195 billion M☉.[3]
In 2024, it was discovered from the LOFAR Two-Metre Sky Survey (LoTSS) that TXS 0033+252 hosted a radio structure with an extent of 7.985 megaparsecs across or 26.04 million light years based on an angular diameter of 19 arcmin.[2][3] As of 2025, this is believed to be the largest radio structure of any radio galaxy, succeeding Porphyrion in size which is 7 megaparsecs across.[5]
See also
- List of largest radio galaxies, includes TXS 0033+252.
- Porphyrion, previous largest radio galaxy.
References
- ^ a b "SIMBAD Results for TXS 0033+252". SIMBAD. Retrieved 7 December 2025.
- ^ a b Mostert, Rafaël (2024). "Constraining the giant radio galaxy population with machine learning and Bayesian inference". Astronomy & Astrophysics. 691: A185. arXiv:2405.00232. Bibcode:2024A&A...691A.185M. doi:10.1051/0004-6361/202348897.
- ^ a b c d Hardcastle, Martin (2023). "The LOFAR Two-Metre Sky Survey". Astronomy & Astrophysics. 678: A151. arXiv:2309.00102. doi:10.1051/0004-6361/202347333.
- ^ Gregory, P. C. (1987). "The 87GB Catalog of Radio Sources Covering 0 degrees < delta < +75 degrees at 4.85 GHz". NASA Ads. 75: 1011. Bibcode:1991ApJS...75.1011G. doi:10.1086/191559. Retrieved 7 December 2025.
- ^ Oei, Martijn (2024). "Black hole jets on the scale of the cosmic web". Nature. 633 (8030): 537–541. arXiv:2411.08630. Bibcode:2024Natur.633..537O. doi:10.1038/s41586-024-07879-y. PMID 39294348.