Narrow line Seyfert 1 galaxies: where are the broad line regions?

• Published in: Science China. Physics, mechanics & astronomy Vol. 53; no. 12; pp. 2307 - 2311
• Main Authors: Mao, WeiMing, Hu, Chen, Wang, JianMin, Bian, WeiHao, Zhang, Shu, Zhao, Gang
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.12.2010; Springer Nature B.V
• Subjects: Astronomy; Classical and Continuum Physics; Observations and Techniques; Physics; Physics and Astronomy; Research Paper; Reverberation; Seyfert galaxies; Sky surveys (astronomy); Toruses; black hole physics; galaxies: evolution; quasars: general
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-010-4158-z

A sample consisting of 211 narrow line Seyfert 1 galaxies (NLS1s) with high quality spectra from the Sloan Digital Sky Survey (SDSS) is selected to explore where broad line regions are in these objects. We find that the H β profile can be fitted well by three (narrow, intermediate and broad) Gaussia...