Kavli Affiliate: Bruce Macintosh | Summary:Observations of debris disks provide a valuable window to investigate the formation and evolution of planetary systems. We present high-contrast JWST/NIRCam observations of CPD-72 2713, a 24 Myr-old star that belongs to the $β$ Pic moving group. We obtained the first scattered-light images of the disk in both F210M and […]
Kavli Affiliate: Luis Ho | Summary:How galaxies stop forming stars is a complex and central problem in astrophysics. Numerous physical mechanisms have been proposed, yet a simple, unified framework connecting these mechanisms remains lacking. Here, we derive a step-function quenching response from the fundamental principle of gas mass conservation, governed by the competition between gas-supply […]
Kavli Affiliate: Feng Long| Summary: China’s next-generation large telescopes, such as the Expandable Aperture Segmented Telescope (EAST) and the Large Optical/Infrared Telescope (LOT), are being planned as flagship facilities for high-angular-resolution astronomy, including the direct imaging and characterization of exoplanetary systems (e.g., exoplanets, circumstellar disks). However, their segmented, centrally obscured apertures present significant challenges for […]
Kavli Affiliate: Linhua Jiang | Summary:The role of the large-scale environment in regulating AGN activity remains an open question. We investigate the Mpc-scale environments of 70 AGNs at $z=1.1$-$1.5$ using a highly complete sample of 3,419 Pa$α$ emitters with accurate spectroscopic redshifts from JWST slitless spectroscopic survey. This dataset allows us to robustly trace the […]
Kavli Affiliate: Linhua Jiang | Summary:Molecular hydrogen (H$_2$) is the fundamental component of the molecular gas reservoir that fuels star formation and black hole growth. While prominent hot H$_2$ emission ($gtrsim 1000$ K) has been explored in nearby galaxies, its excitation mechanisms at higher redshifts remain poorly constrained. We present a systematic study of hot […]
Kavli Affiliate: Linhua Jiang | Summary:We combine wide-area COSMOS-3D observations with deeper GOODS-N data from JWST/NIRCam F444W wide-field slitless spectroscopy to trace cosmic star formation over $zsim0$–9. The observations cover approximately $0.33~mathrmdeg^2$ in COSMOS and $60.9~mathrmarcmin^2$ in GOODS-N, with typical $3σ$ integrated line-flux limits of $3.2times10^-18$ and $1.04times10^-18~mathrmerg,s^-1,cm^-2$, respectively. The common $3.9$–$5.0,μ$m wavelength window probes […]
Kavli Affiliate: Salvatore Vitale | Summary:While the spin vectors of binary black holes offer insight into the astrophysical formation channels of these systems, individual spins are less precisely measured through gravitational-wave observations than the effective inspiral spin $χ_mathrmeff$ and the effective precession spin $χ_mathrmp$. Reducing to effective parameters discards information in the data, but how […]
Kavli Affiliate: Scott A. Hughes | Summary:Extreme mass ratio inspirals (EMRIs) are expected to be a major source of gravitational waves (GWs) for the future it Laser Interferometer Space Antenna (it LISA). An EMRI occurs when a compact object, driven by the emission of gravitational radiation, slowly inspirals into a massive black hole (MBH). The […]
Kavli Affiliate: Mark Vogelsberger | Summary:Merging galaxy clusters provide an ideal laboratory for testing the self-interacting nature of dark matter. In this paper, we present a pilot study of magnetohydrodynamical cosmological zoom-in simulations of two cluster mergers selected from TNG-Cluster, with $M_rm 200c sim 9times10^14~M_odot$ and $M_rm 200csim 2times10^14~M_odot$. The simulations are performed with both […]
Kavli Affiliate: Alexander Ji | Summary:In galaxies, stellar populations represent a superposition of both in situ and accreted components, tracing internal chemical evolution as well as the histories of merged satellites. We investigate how assembly history shapes the chemical properties of present-day stellar populations in low-mass dwarf galaxies. We analyze a suite of EDGE-INFERNO star-by-star […]