| 3C 275.1 | |
|---|---|
| The quasar 3C 275.1. | |
| Observation data (J2000.0 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 43m 57.6490s |
| Declination | +16° 22′ 53.394″ |
| Redshift | 0.555225 |
| Heliocentric radial velocity | 166,452 km/s |
| Distance | 5.260 Gly |
| Apparent magnitude (V) | 19.00 |
| Apparent magnitude (B) | 19.23 |
| Characteristics | |
| Type | Opt. var. |
| Notable features | Large emission nebula surrounding a quasar |
| Other designations | |
| DA 330, PKS 1241+166, LEDA 2819359, QSO B1241+1639, 4C 16.34, NRAO 406, S3 1241+16 | |
3C 275.1 is a quasar located in the constellation of Coma Berenices with a redshift of (z) 0.555. [1] It was first discovered in 1986 by astronomers, and is situated in the center of a rich galaxy cluster. [2] Its host is classified as a giant elliptical galaxy, described as either a proto-cD or Type-cD galaxy with an emission nebula surrounding it. [3] [4] [5]
3C 275.1 is classified as a gamma-ray lobe-dominated quasar. [6] It has a radio structure consisting of an elongated core with a narrow jet heading in northwards direction based on a super-resolved radio imaging made by the Very Long Baseline Array (VLBA). [7] Radio mapping at 15 GHz with a 5-kilometer telescope shows 3C 275.1 to contain a double component showing one side as compact and the other being slightly extended. [8] A study also described the southern component of the quasar as distorted, indicating the quasar is strongly interacting with a companion galaxy. [9] [10]
Observations made in 1986 revealed the presence of a rotating gas cloud around 3C 275.1 with a diameter of more than 100 kiloparsecs (Kpc). Based on observations, it was found to be the largest known to surround a quasar and is likely remnants created by tidal interactions or material that is accumulated via cooling flows originating from the cluster. [11] A more detailed study published in 2024, showed the cloud to be a nebula, containing ionized gas tails that extends up to 170 kiloparsecs, typical of Jellyfish galaxies. [12] The nebula is described as having a conical shape with a bar-shaped extension that is located southwards from the nucleus [13] with an extended component having an X-ray emission of 7.6 x 1043 erg s−1. [14]
In the center of 3C 275.1, there is a supermassive black hole estimated to have a mass of about 200 million solar masses based on a black hole-spheroid mass ratio calculated for active galactic nuclei. [15] [12] The quasar itself is paired with the nearby galaxy NGC 4651, due to the radio emitter alignment at the rear of the latter's outer galactic disk. [16]