Jeremy Goodman
YOU?
Author Swipe
View article: Accretion of Active Galactic Nucleus Stars Under the Influence of Disk Geometry
Accretion of Active Galactic Nucleus Stars Under the Influence of Disk Geometry Open
Massive stars can form within or be captured by active galactic nucleus disks, influencing both the thermal structure and metallicity of the disk environment. In a previous work, we investigated isotropic accretion onto massive stars from …
View article: Surprising Spin–Orbit Resonances of Rocky Planets
Surprising Spin–Orbit Resonances of Rocky Planets Open
Recent works suggest that, in multiplanetary systems, a close-in exoplanet can sometimes avoid becoming tidally locked to its host star if it is captured into a secular spin–orbit resonance with a companion planet. In such a resonance, the…
View article: Accretion of AGN Stars under Influence of Disk Geometry
Accretion of AGN Stars under Influence of Disk Geometry Open
Massive stars can form within or be captured by AGN disks, influencing both the thermal structure and metallicity of the disk environment. In a previous work, we investigated isotropic accretion onto massive stars from a gas-rich, high-ent…
View article: Observation of Nonaxisymmetric Standard Magnetorotational Instability Induced by a Free-Shear Layer
Observation of Nonaxisymmetric Standard Magnetorotational Instability Induced by a Free-Shear Layer Open
The standard magnetorotational instability (SMRI) with a magnetic field component parallel to the rotation axis is widely believed to be responsible for the fast accretion in astronomical disks. In conventional base flows with a Keplerian …
View article: Photoevaporation from Inner Protoplanetary Disks Confronted with Observations
Photoevaporation from Inner Protoplanetary Disks Confronted with Observations Open
The decades-long explorations on the dispersal of protoplanetary disks involve many debates about photoevaporation versus magnetized wind launching mechanisms. This work argues that the observed winds originating from the inner disk ( R ≲ …
View article: Observation of nonaxisymmetric standard magnetorotational instability induced by a free-shear layer
Observation of nonaxisymmetric standard magnetorotational instability induced by a free-shear layer Open
The standard magnetorotational instability (SMRI) is widely believed to be responsible for the observed accretion rates in astronomical disks. It is a linear instability triggered in the differentially rotating ionized disk flow by a magne…
View article: Radiation Hydrodynamic Simulations of Massive Stars in Gas-rich Environments: Accretion of AGN Stars Suppressed by Thermal Feedback
Radiation Hydrodynamic Simulations of Massive Stars in Gas-rich Environments: Accretion of AGN Stars Suppressed by Thermal Feedback Open
Massive stars may form in or be captured into active galactic nuclei (AGN) disks. Recent 1D studies employing stellar-evolution codes have demonstrated the potential for rapid growth of such stars through accretion up to a few hundred sola…
View article: Nonideal Magnetohydrodynamic Instabilities in Protoplanetary Disks: Vertical Modes and Reflection Asymmetry
Nonideal Magnetohydrodynamic Instabilities in Protoplanetary Disks: Vertical Modes and Reflection Asymmetry Open
Magnetized disk winds and wind-driven accretion are an essential and intensively studied dispersion mechanism of protoplanetary disks (PPDs). However, the stability of these mechanisms has yet to be adequately examined. This paper employs …
View article: Radiation Hydrodynamic Simulations of Massive Stars in Gas-rich Environments: Accretion of AGN Stars Suppressed By Thermal Feedback
Radiation Hydrodynamic Simulations of Massive Stars in Gas-rich Environments: Accretion of AGN Stars Suppressed By Thermal Feedback Open
Massive stars may form in or be captured into AGN disks. Recent 1D studies employing stellar-evolution codes have demonstrated the potential for rapid growth of such stars through accretion up to a few hundred $M_\odot$. We perform 3D radi…
View article: Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference
Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference Open
Protoplanetary disks (PPDs) are sites of vigorous hydrodynamic processes, such as accretion and outflows, and ultimately establish the conditions for the formation of planets. The properties of disk outflows are often inferred through the …
View article: Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference
Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference Open
Protoplanetary disks are the sites of vigorous hydrodynamic processes, such as accretion and outflows, and ultimately establish the conditions for the formation of planets. The properties of disk outflows are often inferred through analysi…
View article: Photoevaporation from Inner Protoplanetary Disks Confronted with Observations
Photoevaporation from Inner Protoplanetary Disks Confronted with Observations Open
The decades-long explorations on the dispersal of protoplanetary disks involve many debates about photoevaporation versus magnetized wind launching mechanisms. This letter argues that the observed winds originating from the inner disk ($R\…
View article: Line Profiles of Forbidden Emission Lines and What They Can Tell Us About Protoplanetary Disk Winds
Line Profiles of Forbidden Emission Lines and What They Can Tell Us About Protoplanetary Disk Winds Open
Emission in forbidden lines of oxygen, neon, and other species are commonly used to trace winds from protoplanetary disks. Using Cloudy, we calculate such emission for parametrized wind models of the magnetothermal type, following Bai et a…
View article: Line profiles of forbidden emission lines and what they can tell us about protoplanetary disk winds
Line profiles of forbidden emission lines and what they can tell us about protoplanetary disk winds Open
Emission in forbidden lines of oxygen, neon, and other species are commonly used to trace winds from protoplanetary disks. Using Cloudy, we calculate such emission for parametrized wind models of the magnetothermal type, following Bai et a…
View article: Non-ideal Magnetohydrodynamic Instabilities in Protoplanetary Disks: Vertical Modes and Reflection Asymmetry
Non-ideal Magnetohydrodynamic Instabilities in Protoplanetary Disks: Vertical Modes and Reflection Asymmetry Open
Magnetized disk winds and wind-driven accretion are an essential and intensively studied dispersion mechanism of protoplanetary disks. However, the stability of these mechanisms has yet to be adequately examined. This paper employs semi-an…
View article: Europa's Coupled Ice-Ocean System: Temporal Evolution of a Pure Ice Shell
Europa's Coupled Ice-Ocean System: Temporal Evolution of a Pure Ice Shell Open
Europa's icy surface likely overlies an ocean, but the ice thickness is not known. Here we model the temporal growth of a Europan shell of pure ice subject to varying ice-ocean heat fluxes, ice rheologies, and internal heating rates. Both …
View article: Magnetorotational instability in a swirling partially ionized gas
Magnetorotational instability in a swirling partially ionized gas Open
The magnetorotational instability (MRI) has been proposed as the method of angular momentum transport that enables accretion in astrophysical discs. However, for weakly ionized discs, such as protoplanetary discs, it remains unclear whethe…
View article: Magnetorotational Instability in a Swirling Partially Ionized Gas
Magnetorotational Instability in a Swirling Partially Ionized Gas Open
The magnetorotational instability (MRI) has been proposed as the method of angular momentum transport that enables accretion in astrophysical discs. However, for weakly-ionized discs, such as protoplanetary discs, it remains unclear whethe…
View article: 3D Radiation Hydrodynamic Simulations of Gravitational Instability in AGN Accretion Disks: Effects of Radiation Pressure
3D Radiation Hydrodynamic Simulations of Gravitational Instability in AGN Accretion Disks: Effects of Radiation Pressure Open
We perform 3D radiation hydrodynamic local shearing-box simulations to study the outcome of gravitational instability (GI) in optically thick active galactic nuclei (AGNs) accretion disks. GI develops when the Toomre parameter Q T ≲ 1, and…
View article: 3D Radiation Hydrodynamic Simulations of Gravitational Instability in AGN Accretion Disks: Effects of Radiation Pressure
3D Radiation Hydrodynamic Simulations of Gravitational Instability in AGN Accretion Disks: Effects of Radiation Pressure Open
We perform 3D radiation hydrodynamic local shearing box simulations to study the outcome of gravitational instability (GI) in optically thick Active Galactic Nuclei (AGN) accretion disks. GI develops when the Toomre parameter QT \leq 1, an…
View article: Tidally Distorted Barytropes and Their Roche Limits, with Application to WASP-12b
Tidally Distorted Barytropes and Their Roche Limits, with Application to WASP-12b Open
The hot Jupiter WASP-12b has been found to be on a decaying 1.09 day orbit. The mean density of the planet inferred from transit and radial-velocity data is near its Roche limit; just how near depends on the planet’s uncertain internal str…
View article: Charting Galactic Accelerations with Stellar Streams and Machine Learning
Charting Galactic Accelerations with Stellar Streams and Machine Learning Open
We present a data-driven method for reconstructing the galactic acceleration field from phase-space (position and velocity) measurements of stellar streams. Our approach is based on a flexible and differentiable fit to the stream in phase-…
View article: Observation of Axisymmetric Standard Magnetorotational Instability in the Laboratory
Observation of Axisymmetric Standard Magnetorotational Instability in the Laboratory Open
We report the first direct evidence for the axisymmetric standard magnetorotational instability (SMRI) from a combined experimental and numerical study of a magnetized liquid-metal shear flow in a Taylor-Couette cell with independently rot…
View article: Identification of a non-axisymmetric mode in laboratory experiments searching for standard magnetorotational instability
Identification of a non-axisymmetric mode in laboratory experiments searching for standard magnetorotational instability Open
View article: Charting Galactic Accelerations with Stellar Streams and Machine Learning
Charting Galactic Accelerations with Stellar Streams and Machine Learning Open
We present a data-driven method for reconstructing the galactic acceleration field from phase-space measurements of stellar streams. Our approach is based on a flexible and differentiable fit to the stream in phase-space, enabling a direct…
View article: Identification of a non-axisymmetric mode in laboratory experiments searching for standard magnetorotational instability
Identification of a non-axisymmetric mode in laboratory experiments searching for standard magnetorotational instability Open
This dataset provides the source data of figures in the main text of the paper "Identification of a non-axisymmetric mode in laboratory experiments searching for standard magnetorotational instability" accepted by Nature Communications.
View article: Source data for "Observation of Axisymmetric Standard Magnetorotational Instability in the Laboratory"
Source data for "Observation of Axisymmetric Standard Magnetorotational Instability in the Laboratory" Open
Source data for the article "Observation of Axisymmetric Standard Magnetorotational Instability in the Laboratory" published in Physical Review Letters.
View article: Tidally distorted barytropes and their Roche limits, with application to WASP-12b
Tidally distorted barytropes and their Roche limits, with application to WASP-12b Open
The hot Jupiter WASP-12b has been found to be on a decaying 1.09-day orbit. The mean density of the planet inferred from transit and radial-velocity data is near its Roche limit; just how near depends on the planet's uncertain internal str…
View article: Kepler’s Goat Herd: An exact solution to Kepler’s equation for elliptical orbits
Kepler’s Goat Herd: An exact solution to Kepler’s equation for elliptical orbits Open
A fundamental relation in celestial mechanics is Kepler’s equation, linking an orbit’s mean anomaly to its eccentric anomaly and eccentricity. Being transcendental, the equation cannot be directly solved for eccentric anomaly by convention…
View article: The Role of Far-ultraviolet Pumping in Exciting the [O i] Lines in Protostellar Disks and Winds
The Role of Far-ultraviolet Pumping in Exciting the [O i] Lines in Protostellar Disks and Winds Open
We use Cloudy to re-examine excitation of [O i ] 6300 Å and [O i ] 5577 Å in the X-ray driven photoevaporative wind models of Owen and collaborators, and in more recent magnetothermal models by Wang et al. We find that, at the measured acc…