Fractional Dynamics in Galactic Nuclei: Non-Local Transport, Transient Phenomena and the Nullification of the Schwarzschild Barrier

Posted by klaurent Peking

Kavli Affiliate: Pau Amaro Seoane| First 5 Authors: Pau Amaro Seoane, Pau Amaro Seoane, , , | Summary:We demonstrate the necessity of fractional calculus for modeling anomalous diffusion in stellar dynamics, specifically Resonant Relaxation (RR) near a supermassive black hole (SMBH). Standard transport theories rely on the local Fokker-Planck (FP) equation, a formalism restricted to […]


Continue.. Fractional Dynamics in Galactic Nuclei: Non-Local Transport, Transient Phenomena and the Nullification of the Schwarzschild Barrier

The SEEDZ Simulations: Methodology and First Results on Massive Black Hole Seeding and Early Galaxy Growth

Posted by klaurent Cambridge

Kavli Affiliate: Martin Haehnelt | Summary:Here we introduce the SEEDZ simulations, a suite of cosmological hydrodynamic simulations exploring the formation and growth of the first massive black holes in the Universe. SEEDZ includes models for Population III star formation, supernovae explosions and the resulting formation of light seed black holes, metal enrichment and subsequent Population […]


Continue.. The SEEDZ Simulations: Methodology and First Results on Massive Black Hole Seeding and Early Galaxy Growth

The SEEDZ Simulations: Methodology and First Results on Massive Black Hole Seeding and Early Galaxy Growth

Posted by klaurent Cambridge

Kavli Affiliate: Martin Haehnelt | Summary:Here we introduce the SEEDZ simulations, a suite of cosmological hydrodynamic simulations exploring the formation and growth of the first massive black holes in the Universe. SEEDZ includes models for Population III star formation, supernovae explosions and the resulting formation of light seed black holes, metal enrichment and subsequent Population […]


Continue.. The SEEDZ Simulations: Methodology and First Results on Massive Black Hole Seeding and Early Galaxy Growth

Cosmological Limits on Strong Dark Forces

Posted by klaurent Stanford

Kavli Affiliate: Peter Graham | Summary:We showcase cosmology’s ability to constrain long-range forces between dark matter particles. Specifically, we consider a fermionic dark matter interacting via a Yukawa-coupled light scalar, focusing on regimes where the dark forces are stronger than gravitational and yet unconstrained. We show that the dark sector dynamics, both at the background […]


Continue.. Cosmological Limits on Strong Dark Forces

Cosmological Limits on Strong Dark Forces

Posted by klaurent Stanford

Kavli Affiliate: Peter Graham | Summary:We showcase cosmology’s ability to constrain long-range forces between dark matter particles. Specifically, we consider a fermionic dark matter interacting via a Yukawa-coupled light scalar, focusing on regimes where the dark forces are stronger than gravitational and yet unconstrained. We show that the dark sector dynamics, both at the background […]


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Think inside the box: cosmic variance and large-scale conformity of high-redshift massive galaxies in the FLAMINGO simulations

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino| First 5 Authors: Seunghwan Lim, Seunghwan Lim, , , | Summary:We use the highest-resolution FLAMINGO hydrodynamical simulation to quantify cosmic variance and large-scale coherence in the evolution of massive galaxies at high redshift. FLAMINGO combines a $(1,mathrmcGpc)^3$ volume with baryonic resolution sufficient to identify $gtrsim,10^3$ independent JWST-like survey volumes of $(100,mathrmcMpc)^3$, […]


Continue.. Think inside the box: cosmic variance and large-scale conformity of high-redshift massive galaxies in the FLAMINGO simulations

Adsorption of volatiles on dust grains in protoplanetary disks

Posted by klaurent Peking

Kavli Affiliate: Feng Long| Summary: The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab-initio density functional theory with r$^2$SCAN+rVV10 van der Waals functionals, we calculate adsorption energies of H$_2$, H$_2$O, and CO on carbonaceous (graphene, […]


Continue.. Adsorption of volatiles on dust grains in protoplanetary disks

Adsorption of volatiles on dust grains in protoplanetary disks

Posted by klaurent Peking

Kavli Affiliate: Lile Wang |Summary:The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab-initio density functional theory with r$^2$SCAN+rVV10 van der Waals functionals, we calculate adsorption energies of H$_2$, H$_2$O, and CO on carbonaceous (graphene, amorphous […]


Continue.. Adsorption of volatiles on dust grains in protoplanetary disks

Adsorption of volatiles on dust grains in protoplanetary disks

Posted by klaurent Peking

Kavli Affiliate: Lile Wang |Summary:The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab-initio density functional theory with r$^2$SCAN+rVV10 van der Waals functionals, we calculate adsorption energies of H$_2$, H$_2$O, and CO on carbonaceous (graphene, amorphous […]


Continue.. Adsorption of volatiles on dust grains in protoplanetary disks

TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center

Posted by klaurent Caltech

Kavli Affiliate: James Bock | Summary:We present the processing of an observation of Sagittarius A (Sgr A) with the Tomographic Ionized-carbon Mapping Experiment (TIME), part of the 2021-2022 commissioning run to verify TIME’s hyperspectral imaging capabilities for future line-intensity mapping. Using an observation of Jupiter to calibrate detector gains and pointing offsets, we process the […]


Continue.. TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center