‘Impossibly big’ black hole not as big as previously calculated

The video discusses the black hole LB1, initially claimed to be 70 times the mass of the sun by a team led by Chinese astronomer Liu Jing Fung. This claim was challenged by two independent studies, which argued that the original team misinterpreted spectral data. The new studies suggest that LB1 is more likely a sun-sized black hole, after accounting for emissions from its companion star. The analysis involved using China's LAMOST telescope to detect H alpha line emissions and applying the Doppler effect to infer mass.

What did the new studies claim about the initial team's interpretation of the data?

According to the new studies, what is the more likely size of LB1 after factoring in the star?