Abell 2390
Galaxy cluster in the constellation Pegasus
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Abell 2390 is a massive galaxy cluster located in the constellation Pegasus.[4] It is classified as an X-ray and rich galaxy clusters measured cooling rate of 200–300 M☉yr−1.[5] The galaxy cluster contains a cD galaxy called Abell 2390 BCG (short for brightest cluster galaxy), associated with a complex radio source, B2151+141.[6][7]
| Abell 2390 | |
|---|---|
 | |
| Observation data (Epoch J2000) | |
| Constellation | Pegasus |
| Right ascension | 21h 53m 34.6s[1] |
| Declination | +17° 40′ 11″[1] |
| Brightest member | LEDA 140982 |
| Richness class | 1[2] |
| Redshift | 0.22800 [1] |
| Distance | 919 Mpc (2,997 Mly) h−1 0.705 [1] |
| ICM temperature | 8.89 keV[3] |
| Binding mass | 10.74×1014[3] M☉ |
| X-ray flux | (9.60 ± 23.4%)×10−12 erg s−1 cm−2 (0.1–2.4 keV) [1] |
A study has been conducted on the galaxy members of Abell 2390 and finds each of them have different morphology classifications.[8] Further evidence also points out only a few galaxies show star formations, indicating starbursts play no major role in propelling the galaxy cluster's evolution.[9]
Based on weak gravitational distortion of galaxies lying in the background, dark matter distribution is detected in Abell 2390.[10] Its X-ray distribution in the cluster is elliptical and distorted by its sub-structure on a large scale according to an X-ray ROSAT/HRI observation.[11]
Brightest Cluster Galaxy
The brightest cluster galaxy of Abell 2390 is the supergiant elliptical galaxy, LEDA 140982. It is a Fanaroff-Riley class II radio galaxy hosting a luminous powerful radio source with extended optical emission lines. According to studies published in 2006, the source of LEDA 140982 is found peculiar with a misaligned, compact twin radio jet structure created by the host galaxy's apparent structure. Based on evidence, it might be caused by the precession of its central supermassive black hole.[7] Another study shows the galaxy also contains molecular gas, with some located in a one-sided plume from the galaxy's center.[6]