出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：NLS1s and low-ionization BAL (LoBAL) QSOs appear to share observational properties such as weak [O III] and strong Fe II emission line. We have observed Hb - [O III] region of 23 iron LoBALs and LoBALs at intermediate redshift (1.4 < z < 2.6). Most of our sample are weak [O III] emitters, however, there is a large variety of the strength of optical Fe II.
