Reverberation mapping of the gamma-ray loud narrow-line Seyfert 1 galaxy 1H 0323+342

Journal Article · Mon Jun 20 00:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/824/2/149· OSTI ID:22868965

Wang, Fang; Bai, Jin-Ming; Wang, Chuan-Jun; Yi, Wei-Min; Wang, Jian-Guo; Zhang, Ju-Jia; Xin, Yu-Xin; Lun, Bao-Li; Chang, Liang; Fan, Yu-Feng ^[1]; Du, Pu; Hu, Chen ^[2]

---

1. Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan (China)
2. Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049 (China)

Recently, 1H 0323+342 has attracted a lot of attention as one of several narrow-line Seyfert 1 galaxies detected in the γ-ray band. To understand their central energy engines and jet phenomena, the black hole mass is important. We made use of the Lijiang 2.4 m Telescope to monitor 1H 0323+342 for more than two months. This galaxy is one of the candidates for a monitoring project of super-Eddington accreting massive black holes. The reverberation mapping shows that Hβ emission has a delayed response of 14.8{sub −2.7}{sup +3.9} days with respect to the SDSS g′ light curve in the rest frame. The optical Fe ii variations were detected after subtracting host contaminations, and a reverberation with a delay of 15.2{sub −4.1}{sup +7.4} days was found in the rest frame. By assuming the viral factor f {sub BLR} = 6.17 for the broad-line region (BLR) velocity characterized by FWHM because of the face-on orientation, we find that the black hole mass derived from Hβ is M{sub ∙}=3.4{sub −0.6}{sup +0.9}×10{sup 7}M{sub ⊙}, and the accretion rate is M-dot =1.11{sub −0.47}{sup +0.69}, where M-dot = M-dot {sub ∙}c{sup 2}/L{sub Edd}, M-dot {sub ∙} is the mass accretion rate, L {sub Edd} is the Eddington luminosity, and c is the speed of light. This black hole is one order less massive than that given by the Magorrian relation from the bulge mass. We test the relation between accretion rates and radio-loudnesses in all mapped radio-loud active galactic nuclei, and find that 1H 0323+342 falls within this group.

• OSTI ID: 22868965
• Journal Information: Astrophysical Journal, Vol. 824, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BLACK HOLES
DIAGRAMS
EMISSION
GALAXIES
GALAXY NUCLEI
GAMMA RADIATION
LUMINOSITY
MASS
TELESCOPES
VELOCITY