Cosmological gravitational particle production in multifield inflation

Posted by klaurent Chicago, This Week: Astrophysics

Kavli Affiliate: Edward Kolb | Summary:We study cosmological gravitational particle production (CGPP) of dark matter in two-field inflationary backgrounds with both flat and curved field-space geometries. As a concrete realization of broader multifield mechanisms, we adopt a Starobinsky+quadratic potential and construct benchmark scenarios that interpolate between the flat field-space limit and the sidetracked attractor on […]


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Measuring Magnetic Fields Near and Far with the SKA via the Zeeman Effect

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Susan Clark | Summary:Zeeman splitting in spectral lines — both in emission and absorption — provides direct estimates of magnetic field strength and direction in magnetized gas in our own Milky Way and in external galaxies. We discuss the potential for using the Square Kilometre Array (SKA) to measure the Zeeman effect in […]


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Coupled atmospHere Interior modeL Intercomparison (CHILI). I. Evolutionary Modelling — Primordial Magma Oceans of Earth and Venus

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Laura Schaefer | Summary:Earth and Venus represent two evolutionary outcomes arising from initially molten ‘magma ocean’ periods, followed by lifetimes of chemical and geophysical divergence. Their physics is common to all rocky planets and is accessible to simulations that adopt coupled interior-atmosphere modelling approaches. Our understanding of planet histories and interpretation of current […]


Continue.. Coupled atmospHere Interior modeL Intercomparison (CHILI). I. Evolutionary Modelling — Primordial Magma Oceans of Earth and Venus

Kepler Image-Subtracted Light Curves and Variable Star Catalog of NGC 6819

Posted by klaurent MIT, This Week: Astrophysics

Kavli Affiliate: Andrew Vanderburg | Summary:Variable stars in open clusters are valuable probes of stellar evolution. They provide precise measurements of stellar properties, constrain cluster ages and distances, and trace the angular momentum evolution of stellar populations. To advance these studies, we applied image subtraction and systematic reduction techniques to the NGC 6819 Kepler superstamp […]


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Kepler Image-Subtracted Light Curves and Variable Star Catalog of NGC 6819

Posted by klaurent MIT, This Week: Astrophysics

Kavli Affiliate: Andrew Vanderburg | Summary:Variable stars in open clusters are valuable probes of stellar evolution. They provide precise measurements of stellar properties, constrain cluster ages and distances, and trace the angular momentum evolution of stellar populations. To advance these studies, we applied image subtraction and systematic reduction techniques to the NGC 6819 Kepler superstamp […]


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Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Posted by klaurent Chicago, This Week: Astrophysics

Kavli Affiliate: David W. Miller | Summary:High-throughput scientific facilities such as the Large Hadron Collider depend on real-time event filtering (textittriggering) under tight constraints on bandwidth, latency, and storage. In practice, trigger menus are largely static and hand-tuned and can become suboptimal as detector conditions, pileup, and background composition drift over time. We cast online […]


Continue.. Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Posted by klaurent Chicago, This Week: Astrophysics

Kavli Affiliate: David W. Miller | Summary:High-throughput scientific facilities such as the Large Hadron Collider depend on real-time event filtering (textittriggering) under tight constraints on bandwidth, latency, and storage. In practice, trigger menus are largely static and hand-tuned and can become suboptimal as detector conditions, pileup, and background composition drift over time. We cast online […]


Continue.. Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Posted by klaurent Chicago, This Week: Astrophysics

Kavli Affiliate: David W. Miller | Summary:High-throughput scientific facilities such as the Large Hadron Collider depend on real-time event filtering (textittriggering) under tight constraints on bandwidth, latency, and storage. In practice, trigger menus are largely static and hand-tuned and can become suboptimal as detector conditions, pileup, and background composition drift over time. We cast online […]


Continue.. Learning to Trigger: Reinforcement Learning at the Large Hadron Collider

Chiralization of Quiver Varieties

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Masahito Yamazaki | Summary:Given a quiver Q with gauge dimension $bf v$ and framing dimension $bf w$, one can define the extended quiver variety $widetildemathcal M(mathbf v,mathbf w)$, which is a smooth family of deformations of the Nakajima quiver variety $mathcal M(mathbf v,mathbf w)$. In this paper we discuss two vertex algebras which […]


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Discovery of an Exterior Third Planet Orbiting $β$ Pictoris

Posted by klaurent Stanford, This Week: Astrophysics

Kavli Affiliate: Bruce Macintosh | Summary:We report the discovery of $β$ Pictoris d ($β$ Pic d), a third giant planet in the $β$ Pictoris system, which now becomes only the second directly imaged system with more than two confirmed planets. $β$ Pic d was serendipitously detected in JWST/NIRSpec IFU observations. A second epoch of NIRSpec […]


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