AGN Outflow Shocks on Bonnor-Ebert Spheres

Abstract

Feedback from Active Galactic Nuclei (AGN) and subsequent jet cocoons and outflow bubbles can have a significant impact on star formation in the host galaxy. To investigate feedback physics on small scales, we perform hydrodynamic simulations of realistically fast AGN winds striking Bonnor-Ebert (BE) spheres and examine gravitational collapse and ablation. We test AGN wind velocities ranging from 300--3,000 km s${}^{-1}$ and wind densities ranging from 0.5--10 $m_{\mathrm{p}}{\mathrm{cm}}^{-3}$. We include heating and cooling of low- and high-temperature gas, self-gravity, and spatially correlated perturbations in the shock, with a maximum resolution of 0.01 pc. We find that the ram pressure is the most important factor that determines the fate of the cloud. High ram pressure winds increase fragmentation and decrease the star formation rate, but also cause star formation to occur on a much shorter time scale and with increased velocities of the newly formed stars. We find a threshold ram pressure of $\sim 2\times 10^{-8}$ dyne cm${}^{-2}$ above which stars are not formed because the resulting clumps have internal velocities large enough to prevent collapse. Our results indicate that simultaneous positive and negative feedback will be possible in a single galaxy as AGN wind parameters will vary with location within a galaxy.

References in corpus (42)

• Modeling feedback from stars and black holes in galaxy mergers
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• A unified model for AGN feedback in cosmological simulations of structure formation
• The Herschel ATLAS
• Molecular Cloud Evolution II. From cloud formation to the early stages of star formation in decaying conditions
• An Origin of Supersonic Motions in Interstellar Clouds
• Simulating the formation of molecular clouds. I. Slow formation by gravitational collapse from static initial conditions
• Driving Outflows with Relativistic Jets and the Dependence of AGN Feedback Efficiency on ISM Inhomogeneity
• The History of the Baryon Budget: Cosmic Logistics in a Hierarchical Universe
• Jet-induced star formation in gas-rich galaxies
• Blowin' in the wind: both `negative' and `positive' feedback in an obscured high-z Quasar
• Relativistic Jet Feedback in Evolving Galaxies
• Observations of Feedback from Radio-Quiet Quasars: I. Extents and Morphologies of Ionized Gas Nebulae
• Properties of Galaxy Groups in the SDSS: II.- AGN Feedback and Star Formation Truncation
• Starburst-Driven Galactic Winds: Filament Formation and Emission Processes
• The MAGNUM survey: Positive feedback in the nuclear region of NGC 5643 suggested by MUSE
• Jet-regulated cooling catastrophe
• Galaxy-wide outflows: cold gas and star formation at high speeds
• Evolution of clouds in radio galaxy cocoons
• AGN outflows trigger starbursts in gas-rich galaxies
• Towards a more realistic sink particle algorithm for the RAMSES code
• Fast outflows and star formation quenching in quasar host galaxies
• Ultra Fast Outflows: Galaxy-Scale Active Galactic Nucleus Feedback
• On the Hydrodynamic Interaction of Shock Waves with Interstellar Clouds. II. The Effect of Smooth Cloud Boundaries on Cloud Destruction and Cloud Turbulence
• The Milky Way's Fermi Bubbles: Echoes of the Last Quasar Outburst?
• AGN feedback works both ways
• ALMA observations of cold molecular gas filaments trailing rising radio bubbles in PKS0745-191
• Very Light Magnetized Jets on Large Scales - I. Evolution and Magnetic Fields
• External pressure-triggering of star formation in a disc galaxy: a template for positive feedback
• Asymmetries in Extragalactic Double Radio Sources: Clues from 3D Simulations of Jet - Disc Interaction
• Galaxy-scale AGN Feedback - Theory
• Self-Convergence of Radiatively Cooling Clumps
• Star formation in high-redshift quasars: excess [O II] emission in the radio-loud population
• Herschel-ATLAS: Far-infrared properties of radio-loud and radio-quiet quasars
• Cloud formation in colliding flows: influence of the choice of cooling function
• The Turbulent Destruction of Clouds - II. Mach Number Dependence, Mass-loss Rates, and Tail Formation
• Stellar Signatures of AGN Jet Triggered Star Formation
• Jet interactions with a giant molecular cloud in the Galactic centre and ejection of hypervelocity stars
• On the role of ambient environments in the collapse of Bonnor-Ebert spheres
• Collapse and fragmentation of molecular clouds under pressure
• Constraining stellar assembly and AGN feedback at the peak epoch of star formation
• Positive and negative feedback by AGN jets in high-redshift galaxies

Cited by in corpus (7)

• On the dynamics and survival of fractal clouds in galactic winds
• Gas, dust, and star formation in the positive AGN feedback candidate 4C 41.17 at z=3.8
• Shock-multicloud interactions in galactic outflows -- I. Cloud layers with log-normal density distributions
• Feedback by AGN Jets and Wide-Angle Winds on a Galactic Scale
• Extreme Gaseous Outflows in Radio-Loud Narrow-Line Seyfert 1 Galaxies
• Classifying the full SDSS-IV MaNGA Survey using optical diagnostic diagrams: presentation of AGN catalogs in flexible apertures
• On the interaction of a Bonnor-Ebert sphere with a stellar wind