Search Publications
The Faint Satellite System of NGC 253: Insights into Low-density Environments and No Satellite Plane
Caldwell, Nelson; Strader, Jay; Seth, Anil C. +12 more
We have conducted a systematic search around the Milky Way (MW) analog NGC 253 (D = 3.5 Mpc), as a part of the Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS)—a Magellan+Megacam survey to identify dwarfs and other substructures in resolved stellar light around MW-mass galaxies outside of the Local Group. In total, NGC 253 has five sate…
The Occurrence of Small, Short-period Planets Younger than 200 Myr with TESS
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +10 more
Within the first few hundreds of millions of years, many physical processes sculpt the eventual properties of young planets. NASA's Transiting Exoplanet Survey Satellite (TESS) mission has surveyed young stellar associations across the entire sky for transiting planets, providing glimpses into the various stages of planetary evolution. Using our o…
The Mira Distance to M101 and a 4% Measurement of H 0
Casertano, Stefano; Riess, Adam G.; Zakamska, Nadia L. +8 more
The giant spiral galaxy M101 is host to the nearest recent Type Ia supernova (SN 2011fe) and thus has been extensively monitored in the near-infrared to study the late-time light curve of the SN. Leveraging this existing baseline of observations, we derive the first Mira-based distance to M101 by discovering and classifying a sample of 211 Miras w…
A recently formed ocean inside Saturn's moon Mimas
Lainey, V.; Noyelles, B.; Rambaux, N. +4 more
Moons potentially harbouring a global ocean are tending to become relatively common objects in the Solar System1. The presence of these long-lived global oceans is generally betrayed by surface modification owing to internal dynamics2. Hence, Mimas would be the most unlikely place to look for the presence of a global ocean
JWST observations of 13CO2 ice. Tracing the chemical environment and thermal history of ices in protostellar envelopes
Manoj, P.; Narang, Mayank; Bourke, Tyler L. +38 more
The structure and composition of simple ices can be severely modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical tracers that can be used to diagnose the history and environment of the ice. The 15.2 µm bending mode of 12CO2 in particular has proven to…
The Red Supergiant Progenitor of Type II Supernova 2024ggi
Wang, Xiaofeng; Zhang, Jujia; Mo, Jun +8 more
We present a detailed analysis of the progenitor and its local environment for the recently discovered Type II supernova (SN) 2024ggi at a distance of about 6.7 Mpc, by utilizing the pre-explosion images from the Hubble Space Telescope and Spitzer Space Telescope. The progenitor is identified as a red bright variable star, with absolute F814W-band…
The High-Redshift Gas-Phase Mass–Metallicity Relation in FIRE-2
Faucher-Giguère, Claude-André; Hayward, Christopher C.; Feldmann, Robert +2 more
The unprecedented infrared spectroscopic capabilities of JWST have provided high-quality interstellar medium metallicity measurements and enabled characterization of the gas-phase mass–metallicity relation (MZR) for galaxies at z ≳ 5 for the first time. We analyze the gas-phase MZR and its evolution in a high-redshift suite of FIRE-2 cosmological …
Parameter Estimation for Open Clusters using an Artificial Neural Network with a QuadTree-based Feature Extractor
Cantat-Gaudin, Tristan; Spina, Lorenzo; Carraro, Giovanni +7 more
With the unprecedented increase in the number of known star clusters, quick and modern tools are needed for their analysis. In this work, we develop an artificial neural network (ANN) trained on synthetic clusters to estimate the age, metallicity, extinction, and distance of Gaia open clusters. We implement a novel technique to extract features fr…
The COSMOS-Web ring: In-depth characterization of an Einstein ring lensing system at z ∼ 2
Sanders, D. B.; Ilbert, O.; Kartaltepe, J. S. +35 more
Aims: We provide an in-depth analysis of the COSMOS-Web ring, an Einstein ring at z ≈ 2 that we serendipitously discovered during the data reduction of the COSMOS-Web survey and that could be the most distant lens discovered to date.
Methods: We extracted the visible and near-infrared photometry of the source and the lens from more than …
Morphology of Galaxies in JWST Fields: Initial Distribution and Evolution of Galaxy Morphology
Hwang, Ho Seong; Lee, Jeong Hwan; Park, Changbom +1 more
A recent study from the Horizon Run 5 (HR5) cosmological simulation has predicted that galaxies with