Rainer Weinberger
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View article: MOGLI: model for multiphase gas using multifluid hydrodynamics
MOGLI: model for multiphase gas using multifluid hydrodynamics Open
Multiphase gas, with hot ($\sim 10^6$ K) and cold ($\sim 10^4$ K) gas, is ubiquitous in astrophysical media across a wide range of scales. However, simulating multiphase gas has been a long-standing challenge, due to large separation betwe…
View article: The Blue Jay Survey: Deep JWST Spectroscopy for a Representative Sample of Galaxies at Cosmic Noon
The Blue Jay Survey: Deep JWST Spectroscopy for a Representative Sample of Galaxies at Cosmic Noon Open
We present the Blue Jay survey, a Cycle-1 JWST program aimed at studying the stellar and gas content of galaxies at Cosmic Noon. The survey consists of deep spectroscopy for 153 targets observed over two pointings in the COSMOS field using…
View article: Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation
Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation Open
Modern high-resolution simulations of the interstellar medium (ISM) have shown that key factors in governing star formation are the competing influences of radiative dissipation, pressure support driven by stellar feedback, and gravity. Ho…
View article: Heavy seeds and the first black holes: Insights from the BRAHMA simulations
Heavy seeds and the first black holes: Insights from the BRAHMA simulations Open
From the luminous quasars at $z \sim 6$ to the recent $z \sim 9-11$ AGNs revealed by JWST, observations of the earliest black hole (BH) populations can provide unique constraints on BH formation and growth models. We use the BRAHMA simulat…
View article: Dynamics of Low-mass Black Hole Seeds in the <tt>BRAHMA</tt> Simulations Using Subgrid Dynamical Friction: Impact on Merger-driven Black Hole Growth in the High-redshift Universe
Dynamics of Low-mass Black Hole Seeds in the BRAHMA Simulations Using Subgrid Dynamical Friction: Impact on Merger-driven Black Hole Growth in the High-redshift Universe Open
We analyze the dynamics of low-mass black hole (BH) seeds in the high-redshift ( z ≳ 5) Universe using a suite of [4.5 Mpc] 3 and [9 Mpc] 3 BRAHMA cosmological hydrodynamic simulations. The simulations form seeds with mass M seed = 2.2 × 1…
View article: MISTRAL: a model for AGN winds from radiatively efficient accretion in cosmological simulations
MISTRAL: a model for AGN winds from radiatively efficient accretion in cosmological simulations Open
Feedback from active galactic nuclei (AGNs) is crucial for regulating galaxy evolution. Motivated by observations of broad absorption line winds from rapidly accreting supermassive black holes (SMBHs), we introduce the mistral AGN feedback…
View article: Magnetic dynamos in galaxy clusters: The crucial role of galaxy formation physics at high redshifts
Magnetic dynamos in galaxy clusters: The crucial role of galaxy formation physics at high redshifts Open
Observations of Faraday rotation and synchrotron emission in galaxy clusters imply large-scale magnetic fields with μG strengths possibly extending back to z = 4. Non-radiative cosmological simulations of galaxy clusters show a comparably …
View article: Accretion onto supermassive and intermediate-mass black holes in cosmological simulations
Accretion onto supermassive and intermediate-mass black holes in cosmological simulations Open
Accretion is the dominant contribution to the cosmic massive black hole (MBH) density in the Universe today. However, modelling accretion in cosmological simulations is challenging due to the dynamic range involved, as well as the theoreti…
View article: Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe
Dynamics of low-mass black hole seeds in the BRAHMA simulations using subgrid-dynamical friction: Impact on merger-driven black hole growth in the high redshift Universe Open
We analyze the dynamics of low-mass black hole (BH) seeds in the high-redshift ($z\gtrsim5$) Universe using a suite of $[4.5~\mathrm{Mpc}]^3$ and $[9~\mathrm{Mpc}]^3$ BRAHMA cosmological hydrodynamic simulations. The simulations form seeds…
View article: Probing neutral outflows in z ~ 2 galaxies using JWST observations of Ca II H and K absorption lines
Probing neutral outflows in z ~ 2 galaxies using JWST observations of Ca II H and K absorption lines Open
Using deep JWST/NIRSpec spectra from the Blue Jay survey, we perform the first systematic investigation of neutral gas content in massive galaxies at Cosmic Noon based on the Ca II H, K absorption lines. We analyze a sample of 9 galaxies a…
View article: You Shall Not Pass! The Propagation of Low-/Moderate-powered Jets Through a Turbulent Interstellar Medium
You Shall Not Pass! The Propagation of Low-/Moderate-powered Jets Through a Turbulent Interstellar Medium Open
Feedback from black-hole-powered jets has been invoked in many cosmological simulations to regulate star formation and quench galaxies. Despite this, observational evidence of how jets might be able to affect their hosts remains scarce, es…
View article: Signatures of black hole seeding in the local Universe: predictions from the <tt>BRAHMA</tt> cosmological simulations
Signatures of black hole seeding in the local Universe: predictions from the BRAHMA cosmological simulations Open
The origin of the ‘seeds’ of supermassive black holes (BHs) continues to be a puzzle, as it is currently unclear if the imprints of early seed formation could survive to today. We examine the signatures of seeding in the local Universe usi…
View article: Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation
Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation Open
Modern high-resolution simulations of the interstellar medium (ISM) have shown that key factors in governing star formation are the competing influences of radiative dissipation, pressure support driven by stellar feedback, and the relentl…
View article: Accretion onto supermassive and intermediate mass black holes in cosmological simulations
Accretion onto supermassive and intermediate mass black holes in cosmological simulations Open
Accretion is the dominant contribution to the cosmic massive black hole density in the Universe today. Yet, modelling it in cosmological simulations is challenging due to the dynamic range involved, as well as the theoretical uncertainties…
View article: You Shall Not Pass! The propagation of low/moderate powered jets through a turbulent interstellar medium
You Shall Not Pass! The propagation of low/moderate powered jets through a turbulent interstellar medium Open
Feedback from black hole-powered jets has been invoked in many cosmological simulations to regulate star formation and quench galaxies. Despite this, observational evidence of how jets might be able to affect their hosts remains scarce, es…
View article: MOGLI: Model for Multiphase Gas using Multifluid hydrodynamics
MOGLI: Model for Multiphase Gas using Multifluid hydrodynamics Open
Multiphase gas, with hot ($\sim10^6$K) and cold ($\sim10^4$K) gas, is ubiquitous in astrophysical media across a wide range of scales. However, simulating multiphase gas has been a long-standing challenge, due to the large separation betwe…
View article: Jet Interaction with Galaxy Cluster Mergers
Jet Interaction with Galaxy Cluster Mergers Open
Active galactic nucleus (AGN) bubbles in cool-core galaxy clusters are believed to facilitate the transport of cosmic-ray electrons (CRe) throughout the cluster. Recent radio observations reveal the complex morphologies of cluster diffuse …
View article: Signatures of black hole seeding in the local Universe: Predictions from the BRAHMA cosmological simulations
Signatures of black hole seeding in the local Universe: Predictions from the BRAHMA cosmological simulations Open
The first "seeds" of supermassive black holes (BHs) continue to be an outstanding puzzle, and it is currently unclear whether the imprints of early seed formation survive today. Here we examine the signatures of seeding in the local Univer…
View article: Widespread Rapid Quenching at Cosmic Noon Revealed by JWST Deep Spectroscopy
Widespread Rapid Quenching at Cosmic Noon Revealed by JWST Deep Spectroscopy Open
Massive quiescent galaxies in the young Universe are expected to be quenched rapidly, but it is unclear whether they all experience starbursts before quenching and what physical mechanism drives rapid quenching. We study 14 massive quiesce…
View article: Magnetic dynamos in galaxy clusters: the crucial role of galaxy formation physics at high redshifts
Magnetic dynamos in galaxy clusters: the crucial role of galaxy formation physics at high redshifts Open
Observations of Faraday rotation and synchrotron emission in galaxy clusters imply large-scale magnetic fields with $μ\mathrm{G}$ strengths possibly extending back to $z=4$. Non-radiative cosmological simulations of galaxy clusters show a …
View article: On the Origin of the Ancient, Large-scale Cold Front in the Perseus Cluster of Galaxies
On the Origin of the Ancient, Large-scale Cold Front in the Perseus Cluster of Galaxies Open
The intracluster medium of the Perseus Cluster exhibits spiral-shaped X-ray surface brightness discontinuities known as “cold fronts,” which simulations indicate are caused by the sloshing motion of the gas after the passage of a subcluste…
View article: Growth of high-redshift supermassive black holes from heavy seeds in the <tt>BRAHMA</tt> cosmological simulations: implications of overmassive black holes
Growth of high-redshift supermassive black holes from heavy seeds in the BRAHMA cosmological simulations: implications of overmassive black holes Open
JWST has revealed a large population of accreting black holes (BHs) in the early Universe. Recent work has shown that even after accounting for possible systematic biases, the high-z$M_*{\!-\!}M_{\rm \rm bh}$ relation can be above the loca…
View article: Jet interaction with galaxy cluster mergers
Jet interaction with galaxy cluster mergers Open
AGN bubbles in cool-core galaxy clusters are believed to facilitate the transport of cosmic ray electrons (CRe) throughout the cluster. Recent radio observations are revealing complex morphologies of cluster diffuse emission, potentially l…
View article: Growth of high redshift supermassive black holes from heavy seeds in the BRAHMA cosmological simulations: Implications of overmassive black holes
Growth of high redshift supermassive black holes from heavy seeds in the BRAHMA cosmological simulations: Implications of overmassive black holes Open
JWST has recently revealed a large population of accreting black holes (BHs) in the early Universe. Even after accounting for possible systematic biases, the high-z $M_*-M_{\rm \rm bh}$ relation derived from these objects by Pacucci et al.…
View article: AGN Feedback in Quiescent Galaxies at Cosmic Noon Traced by Ionized Gas Emission
AGN Feedback in Quiescent Galaxies at Cosmic Noon Traced by Ionized Gas Emission Open
We analyze ionized gas emission lines in deep rest-frame optical spectra of 16 quiescent galaxies at redshift $1.7
View article: Introducing the <tt>BRAHMA</tt> simulation suite: signatures of low-mass black hole seeding models in cosmological simulations
Introducing the BRAHMA simulation suite: signatures of low-mass black hole seeding models in cosmological simulations Open
While the first “seeds” of supermassive black holes (BH) can range from $\sim 10^2-10^6 \rm ~{\rm M}_{\odot }$, the lowest mass seeds ($\lesssim 10^3~\rm {\rm M}_{\odot }$) are inaccessible to most cosmological simulations due to resolutio…
View article: Widespread rapid quenching at cosmic noon revealed by JWST deep spectroscopy
Widespread rapid quenching at cosmic noon revealed by JWST deep spectroscopy Open
Massive quiescent galaxies in the young universe are expected to be quenched rapidly, but it is unclear whether they all experience starbursts before quenching and what physical mechanism drives rapid quenching. We study 14 massive quiesce…
View article: Star formation shut down by multiphase gas outflow in a galaxy at a redshift of 2.45
Star formation shut down by multiphase gas outflow in a galaxy at a redshift of 2.45 Open
Large-scale outflows driven by supermassive black holes are thought to have a fundamental role in suppressing star formation in massive galaxies. However, direct observational evidence for this hypothesis is still lacking, particularly in …
View article: Representing low-mass black hole seeds in cosmological simulations: A new sub-grid stochastic seed model
Representing low-mass black hole seeds in cosmological simulations: A new sub-grid stochastic seed model Open
The physical origin of the seeds of supermassive black holes (SMBHs), with postulated initial masses ranging from ∼105 M⊙ to as low as ∼102 M⊙, is currently unknown. Most existing cosmological hydrodynamic simulations adopt very simple, ad…
View article: Introducing the BRAHMA simulation suite: Signatures of low mass black hole seeding models in cosmological simulations
Introducing the BRAHMA simulation suite: Signatures of low mass black hole seeding models in cosmological simulations Open
The first "seeds" of supermassive black holes (BH) can range from $\sim10^2-10^6~M_{\odot}$. However, the lowest mass seeds ($\lesssim10^3 M_{\odot}$) are inaccessible to most cosmological simulations due to resolution limitations. We pres…