Kavli Affiliate: Lijing Shao | Summary:Neutron stars (NSs) are excellent laboratories for testing gravity theories as they are strongly self-gravitating bodies and have rich observational phenomena. However, strong-field gravity effects in NS could be degenerate with their equation of state (EOS) which is largely unknown. Fortunately, there exist the so-called universal relations among the NS […]

Kavli Affiliate: Luis Ho | Summary:The early growth of high-redshift quasars and their host galaxies raises critical questions about their cosmic evolution. We exploit the angular resolution and sensitivity of NIRCam to investigate the host galaxies of 31 quasars at $4lesssim zlesssim7$ drawn from multiple JWST surveys. Using a new multi-band forward-modeling code (textscGalfitS) that […]

Kavli Affiliate: Luis Ho | Summary:James Webb Space Telescope (JWST) has revealed a new class of high-redshift, very red, compact broad-line sources, termed as "little red dots" (LRDs). The physical mechanism driving these properties remains elusive. We construct spectral energy distributions (SEDs) with spectroscopic redshift for 28 LRDs and find they exhibit V-shaped SEDs with […]

Kavli Affiliate: Jing Wang | First 5 Authors: Joel Jang, Seonghyeon Ye, Zongyu Lin, Jiannan Xiang, Johan Bjorck | Summary: We introduce DreamGen, a simple yet highly effective 4-stage pipeline for training robot policies that generalize across behaviors and environments through neural trajectories – synthetic robot data generated from video world models. DreamGen leverages state-of-the-art […]

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, Jing Wang, , , | Summary: Let $G$ be a finite abelian group of order $n$, and for each $ain G$ and integer $1le hle n$ let $mathcalF_a(h)$ denote the family of all $h$-element subsets of $G$ whose sum is $a$. A problem posed by […]