Reddening and He I* $\lambda 10830$ Absorption Lines in Three Narrow-line Seyfert 1 Galaxies

Abstract

We report the detection of heavy reddening and the He I* $\lambda 10830$ absorption lines at the AGNs' redshift in three Narrow-line Seyfert 1 galaxies: SDSS J091848.61+211717.0, SDSS J111354.66+124439.0, and SDSS J122749.13+321458.9. They exhibit very red optical to near-infrared colors, narrow Balmer/Paschen broad emission lines and He I* $\lambda 10830$ absorption lines. The ultraviolet-optical-infrared nucleus continua are reddened by the SMC extinction law of $E(B-V)\sim 0.74$, 1.17, and 1.24 mag for three objects, which are highly consistent with the values obtained from the broad-line Balmer decrements, but larger than those of narrow emission lines. The reddening analysis suggests the extinction dust simultaneously obscure the accretion disk, the broad emission line region, and the hot dust from the inner edge of the torus. It is possible that the dust obscuring the AGN structures are the dusty torus itself. Furthermore, the Cloudy analysis of the He I* $\lambda 10830$ absorption lines propose the distance of the absorption materials to be the extend scale of the torus. That greatly increases probabilities of the obscure and absorption materials being the dusty torus.

21 pages, 7 figures, 2 tables, submitted to the ApJ

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• Feeding the Accretion Disk from the Dusty Torus in a Reddened Quasar
• Mrk 1239: a Type-2 Counterpart of Narrow-line Seyfert-1?
• Discovery of Metastable He I* $\lambda$10830 Mini-broad Absorption Lines and Very Narrow Paschen $\alpha$ Emission Lines in the ULIRG Quasar IRAS F11119+3257