| 4C 61.23 | |
|---|---|
 SDSS image of 4C 61.23 | |
| Observation data (J2000.0epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 37m 21.35s[1] |
| Declination | +61° 20′ 01.15″[1] |
| Redshift | 0.111154[1] |
| Heliocentric radial velocity | 33,323km/s[1] |
| Distance | 1.493Gly |
| Apparent magnitude (V) | 13.07 |
| Characteristics | |
| Type | FR II Sy2[1] |
| Size | ~160,000 ly (49.1 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J11372130+6120007,LEDA 2616039, CoNFIG 103, ASK 155914.0,8C 1134+616,SDSS J113721.34+612001.4, TXS 1134+616, XRS J1137+6120[1] | |
4C 61.23 is aSeyfert type 2 galaxy with anactive galactic nucleus[2] located in the constellation ofUrsa Major. Theredshift of the galaxy is estimated to be (z) 0.111[1] and it was first discovered as anastrophysical X-ray source in 1998 byastronomers who classified it as radio-emitting.[3]
4C 61.23 is categorized as aFanaroff-Riley Type 2radio galaxy with aspheroidal galaxy host.[4] It has presence ofdoubly-ionized peakedemission lines in itsoptical spectrum with the peaks mainly redshifted by 214kilometers per seconds andblueshifted by 87 kilometers per seconds. In addition, the host galaxy displays no evidence oftidal interactions.[2] The centralsupermassive black hole is estimated to be 8.37 ± 0.4Mʘ.[5]
The radio structure of 4C 61.23 is considered as compact. When observed withVery Long Baseline Array (VLBA), it has a secondary component located twomilliarcseconds away from the primary component.[2] There are tworadio lobes present with hotspot features at the ends of each lobe that have an orientation along the northwest to southeast directions. Studies also suggested strong backflows are evident from the lobes which in turn, are deflated in directions opposite from one another.[6] A radio core is found at 400MHzfrequencies with a dimmed appearance.[7]
A study published in 2024 have suggested 4C 61.23 is anX-shaped radio galaxy with dual compact components present. When observed, one of them appears to show an elongated appearance suggesting this as a core-jet structure while the component on the south-east side is indicated to be a secondaryactive galactic core. The separation of the components is estimated to be around 4.6parsecs. Abinary supermassive black hole may well be present inside the center of the galaxy.[7]
