Kavli Affiliate: Huawei Zhang | Summary:It has long been predicted that the Milky Way (MW) will eventually merge with Andromeda (M31), a view reinforced by textitHST measurements indicating a small M31 transverse velocity. However, using updated textitGaia-based proper motions (PMs) and including the dynamical influence of the Large Magellanic Cloud (LMC) and M33, Sawala et […]
Kavli Affiliate: Jeffrey Neaton | Summary:We construct a many-body model Hamiltonian to capture how phonons renormalize exciton binding as a function of temperature. By using the GW approximation and density functional perturbation theory, we are able to parameterize this Hamiltonian completely from first principles. To capture static quasiparticle properties non-perturbatively, we evolve this Hamiltonian in […]
Kavli Affiliate: Dimitri Mawet| Summary:Achieving the Habitable Worlds Observatory (HWO) goal of 10^-10 contrast at a separation of 3 $λ$/D across a 20% bandwidth requires coronagraph focal plane masks with both broadband high contrast performance and high planet throughput. Scalar vortex coronagraphs (SVCs) offer a promising alternative to polarization-sensitive vector vortex designs but face chromatic […]
Kavli Affiliate: Pau Amaro Seoane | Summary:The coalescence of degenerate helium cores during red giant collisions – a process we term erythrohenosis – introduces a novel class of transient astrophysical sources of high-energy neutrinos. Using stellar models generated with MESA and SPH simulations of the final inspiral phase, we develop a semi-analytical model to estimate […]
Kavli Affiliate: Nickolay Gnedin | Summary:The largest existing simulations of cosmic reionization model radiative transfer with moment methods that require a closure relation. The two most commonly used closure relations are M1 and OTVET; both close the moment hierarchy at the first moment. We explore the properties of a higher, second-order closure. We show that […]
Kavli Affiliate: Nickolay Gnedin | Summary:The largest existing simulations of cosmic reionization model radiative transfer with moment methods that require a closure relation. The two most commonly used closure relations are M1 and OTVET; both close the moment hierarchy at the first moment. We explore the properties of a higher, second-order closure. We show that […]
Kavli Affiliate: George Ricker | Summary:The Quick-Look Pipeline (QLP; Huang et al. 2020, Kunimoto et al. 2021 and references therein) generates light curves for up to 2 million stars every 27.4 days observed by TESS as part of its planet search. As machine learning methods enable deeper searches and scientific priorities shift toward fainter stars, […]
Kavli Affiliate: Sarah Woolley | Authors: Logan S James, Benjamin Hoffman, Jen-Yu Liu, Marius Miron, Milad Alizadeh, Emmanuel Fernandez, Matthieu Geist, Diane Kim, Aza Raskin, Jon T Sakata, Emmanuel Chemla, Olivier Pietquin and Sarah C Woolley | Summary: Vocal interactions are fundamental for social functioning across animals, including humans. The diverse rules underlying these exchanges […]
Kavli Affiliate: James Bock | Summary:SPHEREx is a NASA mission designed to perform an all-sky spectroscopic survey in the 0.75 – 5 $μ$m wavelength range. Its primary science objectives are to investigate: (1) inflationary cosmology, (2) the history of galaxy formation, and (3) the abundance of molecular ices – critical for prebiotic chemistry – found […]
Kavli Affiliate: Frank Wise | Summary:Raman scattering underlies a broad range of spectroscopic and light-generation techniques, yet its conventional description, based on the Raman gain spectrum, accurately describes only long-pulse, steady-state dynamics. We present a time-domain theoretical approach that provides a unified and physically-transparent description of Raman interactions across all temporal regimes. It enables direct […]