2018MNRAS.477.1356Y

In this paper, we explore the physics of the accretion and jet in narrow-line Seyfert 1 (NLS1) galaxy. Specifically, we compile a sample composed of 16 nearby NLS1 with L_bol/L_Edd >= 0.1. We investigate the mutual correlation between their radio luminosity L_R, X-ray luminosity L_X, optical luminosity L₅₁₀₀, and black hole mass M_BH. By adopting partial correlation analysis, we find (1) a positive correlation between L_X and M_BH and (2) a weak positive correlation between L_R and L₅₁₀₀. However, we don't find significant correlations between L_R and L_X or between L_X and L₅₁₀₀ after considering the effect of the black hole mass, which leads to a finding that L_X/L_Edd is independent of L₅₁₀₀/L_Edd. Interestingly, the findings that L_X is correlated with M_BH and L_X/L_Edd is not correlated with L₅₁₀₀/L_Edd support that the X-ray emission is saturated with increasing {dot}M for L_bol/L_Edd >= 0.1 in NLS1, which may be understood in the framework of slim disc scenario. Finally, we suggest that a larger NLS1 sample with high-quality radio and X-ray data is needed to further confirm this result in the future.