Abell 2390

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_ʘyr⁻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(s)	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]

Abell 2390 BCG

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]

See also

• Abell catalogue
• List of Abell clusters
• X-ray astronomy