Complex sentence: This may be probably the cause of its diffuse, large core, but it contradicts modern galactic evolutionary theories since a huge cD galaxy like A2261-BCG would be expected to have a supermassive black hole.
Split into simpler sentences: This may be probably the cause of its diffuse and large core, but it contradicts modern galactic evolutionary theories. A huge cD galaxy like A2261-BCG would be expected to have a supermassive black hole.