Star formation in self-gravitating disks in active galactic nuclei. II. Episodic formation of broad line regions

  title={Star formation in self-gravitating disks in active galactic nuclei. II. Episodic formation of broad line regions},
  author={J.-M. Wang and Pu Du and Jack A. Baldwin and Junqiang Ge and C. Hu and Gary J. Ferland},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
(abridged) We study the consequence of star formation (SF) in an self-gravity dominated accretion disk in quasars. The warm skins of the SF disk are governed by the radiation from the inner part of the accretion disk to form Compton atmosphere (CAS). The CAS are undergoing four phases to form broad line regions. Phase I is the duration of pure accumulation supplied by the SF disk. During phase II clouds begin to form due to line cooling and sink to the SF disk. Phase III is a period of… 
Self-shadowing Effects of Slim Accretion Disks in Active Galactic Nuclei: The Diverse Appearance of the Broad-line Region
Supermassive black holes in active galactic nuclei (AGNs) undergo a wide range of accretion rates, which lead to diversity of appearance. We consider the effects of anisotropic radiation from
The origin of the Broad Line Region (BLR) in active galaxies remains unknown. It seems to be related to the underlying accretion disk but an efficient mechanism is required to rise the material from
Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei: Gravitational-wave Bursts and Electromagnetic Counterparts from Merging Stellar Black Hole Binaries
The recent advanced LIGO/Virgo detections of gravitational waves (GWs) from stellar binary black hole (BBH) mergers, in particular GW190521, which is potentially associated with a quasar, have
Tidally disrupted dusty clumps as the origin of broad emission lines in active galactic nuclei
Type 1 active galactic nuclei display broad emission lines, which are regarded as arising from photoionized gas moving in the gravitational potential of a supermassive black hole1,2. However, the
Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VIII. Structure of the Broad-line Region and Mass of the Central Black Hole in Mrk 142
This is the eighth in a series of papers reporting on a large reverberation mapping campaign to measure black hole (BH) mass in high accretion rate active galactic nuclei (AGNs). We employ the
Accretion in Active Galactic Nuclei
  • B. Czerny, M. Naddaf
  • Physics
    Proceedings of Accretion Processes in Cosmic Sources – II — PoS(APCS2018)
  • 2019
We review the current status of the understanding how the accretion onto the central black hole proceeds in Active Galaxies. Standard accretion disk is a key element in all relatively bright active
Interpretation of Departure from the Broad-line Region Scaling in Active Galactic Nuclei
Most results of the reverberation monitoring of active galaxies showed a universal scaling of the time delay of the Hbeta emission region with the monochromatic flux at 5100 A, with very small
The broad emission line region of quasars and gravitational lensing by early-type galaxies
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Outflows from active galactic nuclei: the BLR-NLR metallicity correlation
The metallicity of active galactic nuclei (AGNs), which can be measured by emission line ratios in their broad- and narrow-line regions (BLRs and NLRs), provides invaluable information about the


Radiation Pressure-supported Starburst Disks and Active Galactic Nucleus Fueling
We consider the structure of marginally Toomre-stable starburst disks under the assumption that radiation pressure on dust grains provides the dominant vertical support against gravity. This
Disk Winds and Disk Emission Lines
We show that a thin disk illuminated by a central source will produce single-peaked broad emission lines if there is a wind emerging from the disk. Line-driven winds in active galactic nuclei and in
We explore the properties of cold gravitoturbulent accretion disks?non-fragmenting disks hovering on the verge of gravitational instability (GI)?using a realistic prescription for the effective
Self-similar Solution of Optically Thick Advection-dominated Flows
The photons released by the viscosity process in a disk with accretion rate exceeding the Eddington critical value will be trapped and restored as entropy in the accreting gas rather than being
Is the Broad-Line Region Clumped or Smooth? Constraints from the Hα Profile in NGC 4395, the Least Luminous Seyfert 1 Galaxy
The origin and configuration of the gas that emits broad lines in Type I active galactic nuclei is not established yet. The lack of small-scale structure in the broad emission-line profiles is
Cold and Warm Gas Outflows in Radio AGN
Abstract The study of the conditions and the kinematics of the gas in the central region of AGN provides important information on the relevance of feedback effects connected to the nuclear activity.
Observational Constraints on the Internal Velocity Field of Quasar Emission-Line Clouds
This paper addresses the question, what does the spectrum of a typical quasar reveal about the velocity structure within its broad emission line region clouds? Turbulent (i.e., nonthermal) broadening
The Effect of Radiation Pressure on Emission-line Profiles and Black Hole Mass Determination in Active Galactic Nuclei
We present a new analysis of the motion of pressure-confined, broad-line region (BLR) clouds in active galactic nuclei (AGNs) taking into account the combined influence of gravity and radiation
We show that the mass of ionized gas in the broad-line regions (BLRs) of luminous quasars is at least several hundred M� , and probably of the order of 10 3 –10 4 M� . BLR mass estimates in several
A Systematic Analysis of Fe II Emission in Quasars: Evidence for Inflow to the Central Black Hole
Broad Fe II emission is a prominent feature of the optical and ultraviolet spectra of quasars. We report on a systematical investigation of optical Fe II emission in a large sample of 4037 z < 0.8