100 citations · 528 across the 57 of their papers we have counts for
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BlackHoleWeather -- Spin-coupled chaotic cold accretion across the meso scale: Variability and kinematics
Olmo Piana, Massimo Gaspari, Vieri Cammelli +10
Supermassive black hole (SMBH) spin records the vector history of accretion. In chaotic cold accretion (CCA), this history is set by clouds and filaments whose torques can add cohe…
BlackHoleWeather -- Chaotic cold accretion across the meso-scale: Morphology and thermodynamics
Filippo Barbani, Massimo Gaspari, Vieri Cammelli +12
Supermassive black holes (SMBHs) self-regulate galaxies, groups, and clusters, yet the pathway transporting gas from halo scales to sub-pc radii remains debated. In hot stratified…
BlackHoleWeather -- Chaotic cold accretion across the meso-scale: Variability and kinematics
Filippo Barbani, Massimo Gaspari, Olmo Piana +12
Accretion onto supermassive black holes (SMBHs) in realistic halos is time-variable, governed by turbulence, cooling, and multiphase condensation. In chaotic cold accretion (CCA),…
BlackHoleWeather -- Jet-regulated chaotic cold accretion across the meso scale: Morphology and thermodynamics
Vieri Cammelli, Massimo Gaspari, Olmo Piana +11
How mechanical AGN feedback couples to multiphase condensation across scales remains a problem in galaxy groups and clusters. It is unclear how jets reshape the chaotic cold accret…
BlackHoleWeather -- Spin-coupled chaotic cold accretion across the meso-scale: Morphology and thermodynamics
Olmo Piana, Massimo Gaspari, Filippo Barbani +10
Supermassive black hole (SMBH) spin is a key but poorly constrained ingredient of the feeding-feedback loop. Chaotic cold accretion (CCA) of cold gas clouds delivers rapidly varyin…
Numerical Modeling of Galactic Superwinds with Time-evolving Stellar Feedback
A. Danehkar, M. S. Oey, W. J. Gray
Mass-loss and radiation feedback from evolving massive stars produce galactic-scale superwinds, sometimes surrounded by pressure-driven bubbles. Using the time-dependent stellar po…
Nebular C IV 1550 Imaging of the Metal-Poor Starburst Mrk 71: Direct Evidence of Catastrophic Cooling
M. S. Oey, Amit N. Sawant, Ashkbiz Danehkar +10
We use the Hubble Space Telescope ACS camera to obtain the first spatially resolved, nebular imaging in the light of C IV 1548,1551 by using the F150LP and F165LP filters. These ob…
Hydrodynamic Simulations and Time-dependent Photoionization Modeling of Starburst-driven Superwinds
A. Danehkar, M. S. Oey, W. J. Gray
Thermal energies deposited by OB stellar clusters in starburst galaxies lead to the formation of galactic superwinds. Multi-wavelength observations of starburst-driven superwinds p…
Catastrophic Cooling in Superwinds. III. Non-equilibrium Photoionization
A. Danehkar, M. S. Oey, W. J. Gray
Observations of some starburst-driven galactic superwinds suggest that strong radiative cooling could play a key role in the nature of feedback and the formation of stars and molec…
Non-equilibrium Photoionization and Hydrodynamic Simulations of Starburst-driven Outflows
A. Danehkar, M. S. Oey, W. J. Gray
Starburst-driven galactic outflows in star-forming galaxies have been observed to contain complex thermal structures and emission line features that are difficult to explain by adi…
Catastrophic Cooling in Superwinds. II. Exploring the Parameter Space
Ashkbiz Danehkar, M. S. Oey, William J. Gray
Superwinds and superbubbles driven by mechanical feedback from super star clusters (SSCs) are common features in many star-forming galaxies. While the adiabatic fluid model can wel…
A Search for H I Lyman Counterparts to Ultra-Fast X-ray Outflows
G. A. Kriss, J. C. Lee, A. Danehkar
Prompted by the H I Ly absorption associated with the X-ray ultra-fast outflow at -17,300 in the quasar PG~1211+143, we have searched archival UV spectra at the…
Orientation of Galactic Bulge Planetary Nebulae toward the Galactic Center
A. Danehkar, Q. A. Parker
We have used the Wide Field Spectrograph on the Australian National University 2.3-m telescope to perform the integral field spectroscopy for a sample of the Galactic planetary neb…
Photoionization modeling of the Galactic planetary nebulae Abell 39 and NGC 7027
Ashkbiz Danehkar, David J. Frew, Quentin A. Parker +1
We estimate distances to the spherical planetary nebula Abell 39 and the bipolar planetary nebula NGC 7027 by interpolating from a wide grid of photoionization models using the 3-D…