Search Publications
The Milky Way bar pattern speed using Hercules and Gaia DR3
Aguerri, J. Alfonso L.; D'Onghia, Elena; Lucchini, Scott
The distribution of moving groups in the solar neighbourhood has been used to constrain dynamical properties of the Milky Way for decades. The kinematic bimodality between the main mode (Hyades, Pleiades, Coma Berenices, and Sirius) and Hercules can be explained by two different bar models - via the outer Lindblad resonance of a bar with a high pa…
The Multilayer Nature of Molecular Gas toward the Cygnus Region
Fang, Min; Chen, Zhiwei; Zhang, Shiyu +12 more
We study the physical properties and 3D distribution of molecular clouds (MCs) toward the Cygnus region using the MWISP CO survey and Gaia DR3 data. Based on Gaussian decomposition and clustering for 13CO lines, over 70% of the fluxes are recovered. With the identification result of 13CO structures, two models are designed to…
Linking Mg II and [O II] spatial distribution to ionizing photon escape in confirmed LyC leakers and non-leakers
Blaizot, Jérémy; Verhamme, Anne; Scarlata, Claudia +29 more
The geometry of the neutral gas in and around galaxies is a key regulator of the escape of ionizing photons. We present the first statistical study aimed at linking the neutral and ionized gas distributions to the Lyman continuum (LyC) escape fraction (fescLyC) in a sample of 22 confirmed LyC leakers and non-leakers at z ≈ 0.…
A Young Super Star Cluster Powering a Nebula of Retained Massive Star Ejecta
Pascale, Massimo; Dai, Liang
We suggest that "Godzilla" of the lensed Sunburst galaxy (z = 2.37) is a young super star cluster powering a nebula of gravitationally trapped stellar ejecta. Employing Hubble Space Telescope photometry and spectroscopy from the Very Large Telescope (VLT) MUSE and VLT/X-Shooter, we infer the physical and chemical properties of the cluster and nebu…
Using JWST Transits and Occultations to Determine ∼1% Stellar Radii and Temperatures of Low-mass Stars
Kirk, James; Eastman, Jason D.; Mahajan, Alexandra S.
Using JWST observations of a primary transit and two secondary eclipses for GJ 1214b, we determine an eccentricity that is more precise than a decade of HARPS data, which enables us to measure the stellar density to 2.62%. Coupled with a prior on the stellar mass from a dynamically calibrated K S–M * relation, we determine R …
High dust content of a quiescent galaxy at z 2 revealed by deep ALMA observation
Übler, Hannah; Steidel, Charles C.; Price, Sedona H. +9 more
We report the detection of cold dust in an apparently quiescent massive galaxy (log (M⋆/M⊙) ≈ 11) at z ~ 2 (G4). The source is identified as a serendipitous 2 mm continuum source in a deep ALMA observation within the field of Q2343-BX610, a z = 2.21 massive star-forming disc galaxy. Available multiband photometry of G4 sugges…
Updated Catalog of Kepler Planet Candidates: Focus on Accuracy and Orbital Periods
Lissauer, Jack J.; Rowe, Jason F.; Jontof-Hutter, Daniel +5 more
We present a new catalog of Kepler planet candidates that prioritizes accuracy of planetary dispositions and properties over uniformity. This catalog contains 4376 transiting planet candidates, including 1791 residing within 709 multiplanet systems, and provides the best parameters available for a large sample of Kepler planet candidates. We also …
Constraints on the dense matter equation of state from young and cold isolated neutron stars
Rea, N.; Marino, A.; Pons, J. A. +3 more
Neutron stars are the dense and highly magnetic relics of supernova explosions of massive stars. The quest to constrain the equation of state (EOS) of ultradense matter and thereby probe the behaviour of matter inside neutron stars is one of the core goals of modern physics and astrophysics. A promising method involves investigating the long-term …
Dark energy survey year 3 results: miscentring calibration and X-ray-richness scaling relations in redMaPPer clusters
Bacon, D.; Smith, M.; Davis, T. M. +77 more
We use Dark Energy Survey Year 3 (DES Y3) clusters with archival XMM-Newton and Chandra X-ray data to assess the centring performance of the redMaPPer cluster finder and to measure key richness observable scaling relations. We find that 10-20 per cent of redMaPPer clusters are miscentred, both when comparing to the X-ray peak position and to the v…
Modeling and Subtracting Diffuse Cluster Light in JWST Images: A Relation between the Spatial Distribution of Globular Clusters, Dwarf Galaxies, and Intracluster Light in the Lensing Cluster SMACS 0723
Willott, Chris J.; Harshan, Anishya; Martis, Nicholas S. +11 more
We present a methodology for modeling and removing light from cluster galaxies and intracluster light (ICL) from James Webb Space Telescope images of gravitational lensing clusters. We apply our method to Webb's First Deep Field the SMACS 0723 Early Release Observations and use the ICL-subtracted images to select a sample of globular clusters (GCs…