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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…
A SPectroscopic Survey of Biased Halos in the Reionization Era (ASPIRE): JWST Reveals a Filamentary Structure around a z = 6.61 Quasar
Hennawi, Joseph F.; Shen, Yue; Strauss, Michael A. +56 more
We present the first results from the JWST program A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE). This program represents an imaging and spectroscopic survey of 25 reionization-era quasars and their environments by utilizing the unprecedented capabilities of NIRCam Wide Field Slitless Spectroscopy (WFSS) mode. ASPIRE will…
Carbonaceous dust grains seen in the first billion years of cosmic time
Chevallard, Jacopo; Carniani, Stefano; D'Eugenio, Francesco +39 more
Large dust reservoirs (up to approximately 108 M⊙) have been detected1-3 in galaxies out to redshift z ≃ 8, when the age of the Universe was only about 600 Myr. Generating substantial amounts of dust within such a short timescale has proven challenging for theories of dust formation4,5 and has prompted t…
JWST Identification of Extremely Low C/N Galaxies with [N/O] ≳ 0.5 at z 6-10 Evidencing the Early CNO-cycle Enrichment and a Connection with Globular Cluster Formation
Ono, Yoshiaki; Ouchi, Masami; Harikane, Yuichi +9 more
We present chemical abundance ratios of 70 star-forming galaxies at z ~ 4-10 observed by the JWST/NIRSpec Early Release Observations, GLASS, and CEERS programs. Among the 70 galaxies, we have pinpointed two galaxies, CEERS_01019 at z = 8.68 and GLASS_150008 at z = 6.23, with extremely low C/N ([C/N] ≲ -1), evidenced with C III]λλ1907,1909, N III]λ…