Search Publications
First insights into the ISM at z > 8 with JWST: possible physical implications of a high [O III] λ4363/[O III] λ5007
Carniani, Stefano; Übler, Hannah; D'Eugenio, Francesco +15 more
We present a detailed analysis of the rest-frame optical emission line ratios for three spectroscopically confirmed galaxies at z > 7.5. The galaxies were identified in the James Webb Space Telescope (JWST) Early Release Observations field SMACS J0723.3 - 7327. By quantitatively comparing Balmer and oxygen line ratios of these galaxies with var…
Spatially Resolved Properties of Galaxies at 5 < z < 9 in the SMACS 0723 JWST ERO Field
Fujimoto, Seiji; Heintz, Kasper E.; Suess, Katherine A. +10 more
We present the first spatially resolved measurements of galaxy properties in the JWST ERO SMACS 0723 field. We perform a comprehensive analysis of five 5 < z < 9 galaxies with spectroscopic redshifts from NIRSpec observations. We perform spatially resolved spectral energy distribution fitting with BAGPIPES, using six NIRCam imaging bands spa…
High-redshift Galaxy Candidates at z = 9-10 as Revealed by JWST Observations of WHL0137-08
Hutchison, Taylor A.; Larson, Rebecca L.; Mahler, Guillaume +25 more
We report the discovery of four galaxy candidates observed 450-600 Myr after the Big Bang with photometric redshifts between z ~ 8.3 and 10.2 measured using James Webb Space Telescope (JWST) NIRCam imaging of the galaxy cluster WHL0137-08 observed in eight filters spanning 0.8-5.0 µm, plus nine Hubble Space Telescope filters spanning 0.4-1.7…
Cosmic ray feedback in galaxies and galaxy clusters
Pfrommer, Christoph; Ruszkowski, Mateusz
Understanding the physical mechanisms that control galaxy formation is a fundamental challenge in contemporary astrophysics. Recent advances in the field of astrophysical feedback strongly suggest that cosmic rays (CRs) may be crucially important for our understanding of cosmological galaxy formation and evolution. The appealing features of CRs ar…
MINDS. The Detection of 13CO2 with JWST-MIRI Indicates Abundant CO2 in a Protoplanetary Disk
Henning, Thomas; Waters, L. B. F. M.; Östlin, Göran +43 more
We present JWST-MIRI Medium Resolution Spectrometer (MRS) spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey Guaranteed Time Observations program. Emission from 12CO2, 13CO2, H2O, HCN, C2H2, and OH is identifi…
Repeating tidal disruptions in GSN 069: Long-term evolution and constraints on quasi-periodic eruptions' models
Read, A. M.; Bianchi, S.; Miniutti, G. +4 more
Context. GSN 069 is the first galactic nucleus where quasi-periodic eruptions (QPEs) have been identified in December 2018. These are high-amplitude, soft X-ray bursts recurring every ∼9 h, lasting ∼1 h, and during which the X-ray count rate increases by up to two orders of magnitude with respect to an otherwise stable quiescent level. The X-ray s…
JWST UNCOVER: discovery of z > 9 galaxy candidates behind the lensing cluster Abell 2744
Labbé, Ivo; van Dokkum, Pieter; Bezanson, Rachel +19 more
We present the results of a search for high-redshift (z > 9) galaxy candidates in the JWST UNCOVER survey, using deep NIRCam and NIRISS imaging in seven bands over ~45 arcmin2 and ancillary Hubble Space Telescope (HST) observations. The NIRCam observations reach a 5σ limiting magnitude of ~29.2 AB. The identification of high-z candid…
StarHorse results for spectroscopic surveys and Gaia DR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young alpha-rich stars
Valentini, M.; Anders, F.; Chiappini, C. +16 more
The Gaia mission has provided an invaluable wealth of astrometric data for more than a billion stars in our Galaxy. The synergy between Gaia astrometry, photometry, and spectroscopic surveys gives us comprehensive information about the Milky Way. Using the Bayesian isochrone-fitting code StarHorse, we derive distances and extinctions for more than…
A Noninteracting Galactic Black Hole Candidate in a Binary System with a Main-sequence Star
Dalba, Paul A.; Geha, Marla; Chang, Philip +10 more
We describe the discovery of a solar neighborhood (d = 468 pc) binary system with a main-sequence sunlike star and a massive noninteracting black hole candidate. The spectral energy distribution of the visible star is described by a single stellar model. We derive stellar parameters from a high signal-to-noise Magellan/MIKE spectrum, classifying t…
Evolution of the Mass-Metallicity Relation from Redshift z ≈ 8 to the Local Universe
Koekemoer, Anton M.; Broadhurst, Tom; Filippenko, Alexei V. +17 more
A tight positive correlation between the stellar mass and the gas-phase metallicity of galaxies has been observed at low redshifts. The redshift evolution of this correlation can strongly constrain theories of galaxy evolution. The advent of JWST allows probing the mass-metallicity relation at redshifts far beyond what was previously accessible. H…