BALQSO Spectra Explained by Shock Disruption of Galactic Clouds

Abstract

Blue-shifted Broad Absorption Lines (BALs) detected in quasar's spectra are indicative of AGN outflows. We show, using 2D hydrodynamical simulations, that disruption of interstellar clouds by a fast AGN wind can lead to formation of cold, dense high speed blobs that give rise to broad absorption features in the transmission spectrum of the AGN continuum source. For a wind velocity of $0.1c$ and sufficiently high cloud density ($n_c$ < $10^4$ cm${}^{-3}$, depending on size), absorption troughs with velocities up to about $3000$ km s${}^{-1}$ can be produced. For slower winds and/or lower cloud density the anticipated velocity of the absorbing clouds should be smaller.

arXiv comment10 pages, 8 figures

References in corpus (26)

• PLUTO: a Numerical Code for Computational Astrophysics
• Dynamics of line-driven disk winds in Active Galactic Nuclei
• A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Third Data Release
• The Frequency and Radio Properties of Broad Absorption Line Quasars
• Momentum Driving: which physical processes dominate AGN feedback?
• Quasar Outflow Contribution to AGN Feedback: Observations of QSO SDSS J0838+2955
• The Quasar Outflow Contribution to AGN Feedback: VLT Measurements of SDSS J0318-0600
• Dynamics of Dusty Radiation Pressure Driven Shells and Clouds: Fast Outflows from Galaxies, Star Clusters, Massive Stars, and AGN
• Quasar Outflows and AGN Feedback in the Far UV: HST/COS Observations of QSO HE0238-1904
• Major contributor to AGN feedback: VLT X-shooter observations of SIV BAL QSO outflows
• 2MASS Reveals a Large Intrinsic Fraction of BALQSOs
• HST STIS Observations of PG 0946+301: the Highest Quality UV Spectrum of a BALQSO
• A Physical Model of FeLoBALs: Implications for Quasar Feedback
• What Determines the Depth of BALs? Keck HIRES Observations of BALQSO 1603+300
• Ion-by-ion Cooling efficiencies
• Evidence that 50% of BALQSO Outflows Are Situated at Least 100 pc from the Central Source
• Energy- and momentum-conserving AGN feedback outflows
• Distance to Multiple Kinematic Components of Quasar Outflows: VLT Observations of QSO 2359-1241 and SDSS J0318-0600
• VLT/X-Shooter Survey of BAL Quasars: Large Distance Scale and AGN Feedback
• A Mini-BAL Outflow at 900 pc from the Central Source: VLT/X-shooter Observations
• A New Test of Copper and Zinc Abundances in Late-Type Stars Using Ultraviolet Cu II and Zn II Lines
• Outflow in Overlooked Luminous Quasar: Subaru Observations of AKARI J1757+5907
• Distance, Energy, and Variability of Quasar Outflows: Two HST/COS epochs of LBQS 1206+1052
• Magnetically Advected Winds
• Numerical simulations of AGN wind feedback on black hole accretion: probing down to scales within the sphere of influence
• Numerical study of active galactic nucleus feedback in an elliptical galaxy with {\it MACER}

Cited by in corpus (5)

• Stratified disc wind models for the AGN broad-line region: ultraviolet, optical and X-ray properties
• The fraction and kinematics of broad absorption line quasars across cosmic time
• Evidence that Emission and Absorption Outflows in Quasars Are Related
• On The Fine Tuning and Physical Origin of Line-Locked Absorption Systems in Active Galaxies
• A New Member of the Fast and Furious Family: A Relativistic and Time-Variable UV Outflow in a Luminous Quasar