SDSS J143030.22-001115.1： A Misclassified Narrow-line Seyfert 1 Galaxy with Flat X-ray Spectrum

• Published in: Chinese journal of astronomy and astrophysics Vol. 6; no. 3; pp. 281 - 286
• Main Authors: Bian, Wei-Hao, Cui, Quan-Ling, Chao, Li-Hua
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2006; Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049%Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097; Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097
• Subjects: X射线光谱; 发射线; 银河系; galaxies: active - galaxies: emission lines - galaxies: nuclei - galaxies:Seyfert- galaxies:individual: J143030.22-001115.1
• ISSN: 1009-9271
• DOI: 10.1088/1009-9271/6/3/02

We used multi-component profiles to model the HE and [O Ⅲ]λλ4959,5007 lines of SDSS J143030.22-001115.1, a narrow-line Seyfert 1 galaxy （NLS1） in a sample of 150 NLS1 candidates selected from the Sloan Digital Sky Survey （SDSS）, Early Data Release （EDR）. After subtracting the HE contribution from narrow line regions （NLRs）, we found that its full width half maximum （FWHM） of broad H/3 line is nearly 2900km s^-1, significantly larger than the customarily adopted criterion of 2000 km s^-1. With its weak Fe II multiples, we believe that SDSS J143030.22-001115.1 should not be classified as a genuine NLS1. When we calculate the virial black hole masses of NLSls, we should use the Hβ linewidth after subtracting the NLR component.