Search Publications
The Three-phase Evolution of the Milky Way
Conroy, Charlie; Hernquist, Lars; Li, Jiadong +6 more
We illustrate the formation and evolution of the Milky Way over cosmic time, utilizing a sample of 10 million red giant stars with full chemodynamical information, including metallicities and α-abundances from low-resolution Gaia XP spectra. The evolution of angular momentum as a function of metallicity—a rough proxy for stellar age, particularly …
A nebular origin for the persistent radio emission of fast radio bursts
Tripodi, Roberta; Savaglio, Sandra; Zhang, Bing +12 more
Fast radio bursts (FRBs) are millisecond-duration, bright (approximately Jy) extragalactic bursts, whose production mechanism is still unclear1. Recently, two repeating FRBs were found to have a physically associated persistent radio source of non-thermal origin2,3. These two FRBs have unusually large Faraday rotation measure…
Hubble tension or distance ladder crisis?
Perivolaropoulos, Leandros
We present an up-to-date compilation of published Hubble constant (
Triage of the Gaia DR3 astrometric orbits. II. A census of white dwarfs
Mazeh, T.; Shahaf, S.; Toonen, S. +4 more
The third data release of Gaia was the first to include orbital solutions assuming non-single stars. Here, we apply the astrometric triage technique of Shahaf et al. to identify binary star systems with companions that are not single main-sequence stars. Gaia's synthetic photometry of these binaries is used to distinguish between systems likely to…
GJ 367b Is a Dark, Hot, Airless Sub-Earth
Knutson, Heather A.; Hu, Renyu; Dai, Fei +6 more
We present the mid-infrared (5–12 µm) phase curve of GJ 367b observed by the Mid-Infrared Instrument on the James Webb Space Telescope (JWST). GJ 367b is a hot (T eq = 1370 K), extremely dense (10.2 ± 1.3 g cm‑3) sub-Earth orbiting an M dwarf on a 0.32 day orbit. We measure an eclipse depth of 79 ± 4 ppm, a nightside pl…
PDRs4All. II. JWST's NIR and MIR imaging view of the Orion Nebula
Hartigan, Patrick; Zhang, Yong; Gordon, Karl D. +139 more
Context. The James Webb Space Telescope (JWST) has captured the most detailed and sharpest infrared (IR) images ever taken of the inner region of the Orion Nebula, the nearest massive star formation region, and a prototypical highly irradiated dense photo-dissociation region (PDR).
Aims: We investigate the fundamental interaction of far-ultra…
Unveiling the hidden Universe with JWST: the contribution of dust-obscured galaxies to the stellar mass function at z 3 - 8
Xiao, M.; Brammer, G.; Toft, S. +17 more
With the advent of JWST, we can probe the rest-frame optical emission of galaxies at $z\gt 3$ with high sensitivity and spatial resolution, making it possible to accurately characterize red, optically faint galaxies and thus move towards a more complete census of the galaxy population at high redshifts. To this end, we present a sample of 148 mass…
The Mantis Network. IV. A titanium cold trap on the ultra-hot Jupiter WASP-121 b
Allart, R.; Morris, B. M.; Heng, Kevin +10 more
Context. Using emission lines from metals, we investigate the three-dimensional distribution of temperature and chemistry in ultra-hot Jupiters.
Aims: Existing observations of WASP-121 b have suggested an underabundance of titanium and titanium oxide in its terminator region. In this study, we aim to determine whether this depletion is global…
A warm Neptune's methane reveals core mass and vigorous atmospheric mixing
Sing, David K.; Maiolino, Roberto; Valenti, Jeff A. +18 more
Observations of transiting gas giant exoplanets have revealed a pervasive depletion of methane1-4, which has only recently been identified atmospherically5,6. The depletion is thought to be maintained by disequilibrium processes such as photochemistry or mixing from a hotter interior7-9. However, the interiors are …
Galaxies Going Bananas: Inferring the 3D Geometry of High-redshift Galaxies with JWST-CEERS
Papovich, Casey; Yang, Guang; Finkelstein, Steven L. +53 more
The 3D geometries of high-redshift galaxies remain poorly understood. We build a differentiable Bayesian model and use Hamiltonian Monte Carlo to efficiently and robustly infer the 3D shapes of star-forming galaxies in James Webb Space Telescope Cosmic Evolution Early Release Science observations with $\mathrm{log}{M}_{* }/{M}_{\odot }=9.0\mbox{--…