Ultraviolet and Optical Emission-line Outflows in the Heavily Obscured Quasar SDSS J000610.67+121501.2: At the Scale of the Dusty Torus and Beyond

Abstract

Broad emission-line outflows of active galactic nuclei (AGNs) have been proposed for many years but are very difficult to quantitatively study because of the coexistence of the gravitationally-bound and outflow emission. We present detailed analysis of a heavily reddened quasar, SDSS J000610.67+121501.2, whose normal ultraviolet (UV) broad emission lines (BELs) are heavily suppressed by the Dusty Torus as a natural "Coronagraph", thus the blueshifted BELs (BBELs) can be reliably measured. The physical properties of the emission-line outflows are derived as follows: ionization parameter $U\sim 10^{-0.5}$, column density $N_{\mathrm{H}}\sim 10^{22.0}$ cm${}^{-2}$, covering fraction of $\sim 0.1$ and upper limit density of $n_{\mathrm{H}}\sim 10^{5.8}$ cm${}^{-3}$. The outflow gases are located at least 41 pc away from the central engine, which suggests that they have expanded to the scale of the dust torus or beyond. Besides, Lya shows a narrow symmetric component, to our surprise, which is undetected in any other lines. After inspecting the narrow emission-line region and the starforming region as the origin of the Lya narrow line, we propose the end-result of outflows, diffusing gases in the larger region, acts as the screen of Lya photons. Future high spatial resolution spectrometry and/or spectropolarimetric observation are needed to make a final clarification.

26 pages, 7 figures, submited to the ApJ

References in corpus (13)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity
• Broad-line Balmer Decrements in Blue Active Galactic Nuclei
• On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
• Extremely Red Quasars in BOSS
• Luminous K-band Selected Quasars from UKIDSS
• A Balmer-line Broad Absorption Line Quasar
• A Comprehensive Study of Broad Absorption Line Quasars: I. Prevalence of HeI* Absorption Line Multiplets in Low-Ionization Objects
• Outflow and hot dust emission in broad absorption line quasars
• Strong Variability of Overlapping Iron Broad Absorption Lines in Five Radio-selected Quasars
• Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18$+$551328.9
• Seven broad absorption line quasars with excess broad band absorption near 2250 Å
• Polarization of Quasars: Resonant Line Scattering in the Broad Absorption Line Region

Cited by in corpus (7)

• Ionized gas outflows in infrared-bright dust-obscured galaxies selected with WISE and SDSS
• Probing the Inner Circumgalactic Medium and Quasar Illumination around the Reddest `Extremely Red Quasar' (ERQ)
• Feeding the Accretion Disk from the Dusty Torus in a Reddened Quasar
• Reddening and He I* $\lambda 10830$ Absorption Lines in Three Narrow-line Seyfert 1 Galaxies
• SDSS J153636.22+044127.0 and its analogues: shocked outflows, not active binary black holes
• A Broad Absorption Line Outflow Associated with the Broad Emission Line Region in the Quasar SDSS J075133.35+134548.3
• Broad Emission and Absorption Line Outflows in the Quasar SDSS J163345.22+512748.4