New papers on Galaxies
98 new papers on galaxies in the last 7 days, within Space & cosmos. These are the 50 Pipette rates most worth reading, with the main result in the authors' own words.
The best of the week
Supernova origin of galactic turbulence revealed by superbubbles
These results demonstrate that clustered SN feedback is sufficient to sustain galactic-scale turbulence, which shapes disk structure and influences galaxy evolution.
Preprint with a published versionClaims a big stepKiDS J1447-0149: The first spatially resolved spectroscopy of a relic galaxy beyond the local universe. An old high-dispersion core embedded in a compact rotating stellar structure
We present the first spatially resolved spectroscopic study of J1447-0149, a massive relic at , observed with MUSE+AO.
PreprintClaims a big stepThe First Blind Survey of Intervening NaI Absorbers: Incidence and Cosmic Evolution with DESI
We present the first blind statistical survey of intervening NaI absorbers over the last ~Gyr using quasar spectra from the Dark Energy Spectroscopic Instrument Data Release~1.
PreprintClaims a big stepSearch for High-Ionization Nebular Emission (SHINE). I. A Systematically Selected [Ne V] Sample at z > 3 with JWST/NIRSpec PRISM
We conduct the first systematic Search for High-Ionization Nebular Emission (SHINE) using [Ne V] in JWST/NIRSpec PRISM spectroscopy at .
PreprintClaims a big stepPAHSPECS: JWST/MIRI Spectroscopy of PAHs at Cosmic Noon
We present the PAH Spectroscopic Survey (PAHSPECS) JWST program, the first MIRI/MRS survey of the 3.3, 6.2, 7.7, 8.6 and 11.3m PAH features in MS galaxies at z~1.
PreprintClaims a big stepA sub-100 pc view at z~5 of a Multiply-Imaged Massive Quiescent Galaxy
Together, these features show that VENUS-CLJ0152-QG1 abruptly ceased star formation in the absence of a compaction event or an obvious active galactic nucleus.
PreprintClaims a big stepThe quest for high-redshift radio galaxies II. Discovery of the most powerful known radio galaxy at z=4.946
This result makes this source the most powerful radio galaxy currently known.
PreprintClaims a big stepStochastic black hole growth tracks stellar mass in ultramassive galaxies
In this extreme mass regime, the galaxies tightly follow the relation with minimal scatter, successfully confirming theoretical predictions.
PreprintBold claims, read criticallyClaims a big stepMapping the Milky Way in Six Dimensions: A contiguous, homogenised, phase-space catalogue of Gaia DR3 tracers up to 250 kpc
We present a comprehensive, homogenised catalogue of stellar sources with full 6D phase-space information, spanning Galactocentric distances from the inner galaxy ( kpc) to the outer halo ( kpc).
PreprintEarly metal-enriched baryon cycling before the midpoint of cosmic reionization
Here we show that metal-enriched gas in multiple ionic phases was already present around galaxies before the midpoint of cosmic reionization.
Peer-reviewed journalDIISC-VII: Linking Radial Gas Motions to Anomalously Low Metallicity Star-forming Regions in the XUV Disk of NGC 3344
We present evidence connecting anomalously low-metallicity regions to radial gas inflows in the extended ultraviolet (XUV) disk of the galaxy NGC 3344.
Preprint with a published versionBold claims, read criticallyClaims a big stepALMA Chemical Evolution (ACE) survey: an overview -- extending dust and gas inference to low metallicities at cosmic noon
ACE provides the first comprehensive view of the interplay between molecular gas, dust, metals, and star formation in sub-solar metallicity galaxies at cosmic noon, enabling direct tests of models for baryon cycling, chemical enrichment, and dust evolution during the peak epoch of galaxy assembly.
PreprintEuclid: Quick Data Release (Q1) -- Optical hotspots in powerful radio galaxies
By combining Low-Frequency Array (LOFAR) observations with the Euclid Q1 data release in the Euclid Deep Field North, we identify 77 powerful radio galaxies with hotspots and show that a small but significant fraction of them, 7--15%, may have detected infrared and optical counterparts to their hotspots.
PreprintEuclid Quick Data Release (Q1): Disc breaks highlight the structural evolution of galaxies through time
Our study provides the first statistically robust measurement of the evolution of disc break types over 5 Gyr.
PreprintMorphology classification for galaxies in the Kilo Degree Survey using a label-efficient self-supervised learning framework
Our results show that self-supervised learning can substantially reduce the need for manual labels while maintaining high classification accuracy, making it a promising and scalable approach for automated galaxy morphology classification in the era of large-scale surveys.
Preprint with a published versionLow-power jet-ISM coupling and disk-plane perturbations in the edge-on Seyfert galaxy NGC 4388
We report the first observational evidence that even a low-power radio jet oriented nearly perpendicular to the galaxy disk can efficiently couple with the ISM, suggesting that jet-induced perturbations are an important AGN feedback channel regardless of jet orientation.
PreprintBold claims, read criticallyALMA Chemical Evolution (ACE) survey: dust-to-gas ratios in sub-solar metallicity galaxies at cosmic noon
We find that increases with metallicity, with a log-space slope of , indicating that metal-poor galaxies have systematically lower than their more metal-rich counterparts.
PreprintOn the Detectability and Measurement of Galactic Bars as a Function of Redshift
We propose a standardized workflow that prioritizes mock-derived adaptive criteria and ellipse fitting, providing quantitative correction factors and empirical relations that enable future studies to recover intrinsic bar statistics from raw observations.
PreprintCERIDWEN: Fast and Flexible GPU-Accelerated Stellar Population Inference
We present CERIDWEN, a GPU-native SED fitting framework written in JAX, with an end-to-end differentiable forward model spanning stellar populations, nebular emission, dust attenuation and emission, and projection into the observer frame.
PreprintCode availableGalaxy-SMBH co-evolution in 2,435 DESI disk galaxies and merger-free BH growth in bulgeless disks
We analyse black hole scaling relations for disk-dominated galaxies, and present evidence for secularly driven galaxy-black hole co-evolution.
PreprintFountain pattern of baryon cycle revealed in galaxy ecosystems
Applied to a cosmological hydrodynamic simulation, this approach unveils strikingly regular patterns in gas properties across the full spatial extent of galaxy ecosystems, in close agreement with those inferred from observations.
PreprintThe Galactic Phosphorus Survey. I. Chemical Evolution across the Galactic Disk from 750 FGK Stars
We determine the relationship between [P/Fe] and [Fe/H] over a range of metallicities across the Galactic disk and assess its variation between different stellar populations using the largest uniformly analyzed sample to date, comprising 750 FGK stars with high-resolution near-infrared spectra.
PreprintUbiquitous nuclear disks and bars embedded in massive galaxies in the cosmic morning
This indicates that the central regions are predominantly nuclear disks and bars rather than bulges.
PreprintQuiescent Galaxies at from CAPERS spectroscopy and their Number densities
The resulting number densities exceed the predictions of most current galaxy-formation simulations at , with the largest discrepancy at .
PreprintThe JWST Ultramassive Galaxy Sample -- II. Supermassive Black Hole Masses for 8 Extreme Early-Type Galaxies via Jeans Anisotropic Modelling of High-Resolution Integral-Field NIRSpec Stellar Kinematics
We present central supermassive black hole (BH) mass measurements for the JWST Ultramassive Galaxy Sample, comprising 8 galaxies selected from a complete sample of the most massive early-type galaxies in the nearby Universe ().
PreprintObservational Evidence of an Internal Shock Collision in the Relativistic Jet of the Nearby Radio Galaxy 3C 111
These results provide direct evidence for an internal shock in an active galactic nucleus jet and support a hybrid picture in which internal and standing shocks coexist in relativistic jets and may play different roles in their variability.
PreprintBayesian Galaxy Asymmetry
We propose a novel Bayesian approach to calculate the probability of an underlying squared differences asymmetry in a noisy detection.
Preprint with a published versionIntrinsic Tidal Shear at the Largest Scales: Galaxy Multiplet Alignment in DESI DR2
Multiplet alignment offers direct access to the tidal shear field in all galaxy samples, even where individual galaxy alignment cannot, and extends IA detection to the largest scales yet probed.
PreprintLATED: Ly-anchored photometric selection of candidate metal-free and extremely metal-poor star formation from the end of reionisation to cosmic noon
We present LATED (Lyman-Alpha Tomography of Extremely Metal-poor Domains), which selects metal-free and extremely metal-poor candidates from a Ly-emitter parent sample using strong-line diagnostics.
PreprintSown at Cosmic Dawn: Searching for Pop III Signatures in JWST JADES He II Selected Line Emitters
We find no evidence for any pristine Pop III galaxies.
PreprintLATED: JWST integral field spectroscopy of a galaxy caught in chemical infancy at behind Abell 2744
LATED-1 is therefore a dwarf galaxy caught in the earliest state of chemical enrichment, and a compelling target for testing whether Pop III star formation can persist to .
PreprintBold claims, read criticallySpatial segregation as the origin of anisotropic satellite quenching in haloes and beyond
Here we use the SIMBA, TNG100, EAGLE, and feedback-free SIMBA cosmological simulations at to show that this satellite anisotropy primarily originates from spatial segregation between quenched and unquenched populations.
PreprintBold claims, read criticallyGone with the wind? Potential gas inflow in the broad-line region of a QSO at traced by time-varying Balmer absorption
The reshifted centroid velocities of both absorbers imply an inflow, where the inferred mass inflow rate is comparable to the single-epoch mass accretion rate of this QSO.
PreprintBreaking the Blend: A multi-tracer kinematic decomposition method for IFS data applied to disentangling the AGN outflow and circumnuclear ring in NGC 5728 with JWST
We present a new framework for decomposing IFS data into distinct components on a spaxel-by-spaxel basis using a multi-tracer, stacked kinematics approach.
PreprintBold claims, read criticallyALMA Chemical Evolution (ACE) survey: the dust content of subsolar metallicity galaxies at cosmic noon
The resulting dust masses average , and they are three to nine times larger than those of z=0 galaxies at a matched metallicity and stellar mass.
PreprintThe JWST Ultramassive Galaxy Sample -- I. Overview, Photometry, and Stellar Kinematics: Selecting Optimal Template Subsets via Non-Negative Matrix Factorization
In this first paper, we present the foundational data products: detailed photometric models and spatially resolved nuclear stellar kinematics.
PreprintThe JWST and ALMA view of local dwarf Pox 186: Evidence of stripped binaries driving a hard radiation field and little cold molecular gas resulting in high star-formation efficiency
This analysis strongly suggests that star formation rather than active galactic nuclei drives the hard radiation field observed in Pox 186, and cautions against relying solely on the UV diagnostics to establish the nature of high-z galaxies.
PreprintThe ALMA View of High-Redshift Galaxy Formation
The main findings are as follows: Cool gas consistently scales with star-formation in a wide range of galaxy environments, similar to local relations, suggesting fundamental processes of star-formation stay relatively constant over 13 billion years of cosmic time.
Preprint with a published versionCode availableTracing Interstellar Gas in Quiescent Galaxies Using Na I D and Ca II H&K Absorption
We find that the Ca II reservoirs are up to ~ 6 times larger in area, twice as radially extended, and have ~ 1.7 - 1.8x broader line widths than Na I D. Furthermore, Na I D shows a direct dependence on dust reservoir size, but the correlation vanishes for Ca II.
PreprintALMA Chemical Evolution (ACE) Survey: Molecular gas properties of low-mass, low-metallicity galaxies at cosmic noon
We find that the ACE galaxies extend established molecular-gas scaling relations to an order of magnitude lower stellar masses than previously explored at cosmic noon.
PreprintGalaxy And Mass Assembly (GAMA): The Most Isolated GAMA Galaxies
Given the lack of significant interactions for the isolated sample, this implies that the evolution of present-day star-forming galaxies in all environments (at least outside rich clusters) has been, and remains, dominated by internal processes.
PreprintA Sample of 459 Galaxy Groups Identified from the FAST All Sky HI Survey DR2
A group-finding algorithm with a density contrast criterion and a minimum membership of five yields a catalog of 459 galaxy groups containing 3015 HI sources.
PreprintCECILIA: Using Flexible Photoionization Models to Accurately Measure Abundances without Auroral Lines
We show that Cue can be used to accurately measure O/H while remaining agnostic to the ionizing spectrum and that accurate recovery of O/H can be achieved with relatively bright oxygen and sulfur lines, demonstrating that Cue could be used to measure metallicity in large samples that lack the depth necessary for direct measurements of O/H.
PreprintRadio Quasars in the Cosmic Dawn: A Spectroscopic Sample from the DESI Survey
We present the largest statistical spectroscopic sample of radio quasars at 4.7<z<6.7 to date.
PreprintStar Formation and Nebular Attenuation from Pa, Br, and Br in Massive Dust-obscured Galaxies at Cosmic Noon using JWST
SFRs measured from using common conversions are systematically higher than the SFRs derived from attenuation-corrected nebular line measurements by a factor of .
PreprintBalmer Absorption Series and Broad Metal Lines in Two Luminous Little Red Dots
We find two systematic trends along the Balmer series: the absorption centroids become more redshifted toward higher-order transitions, while the absorbed equivalent widths decline only weakly with increasing order, far less than expected from the atomic optical-depth ratios for a single attenuating screen.
PreprintMass Distribution of M31 from its Rotation Curve up to 167 kpc
Overall, our analysis provides a comprehensive measurement of M31's mass distribution under the assumption of dynamical equilibrium, while also quantifying the systematic uncertainties associated with halo velocity anisotropy and the choice of dark matter density profile.
PreprintPEGASUS (Pfs Emission-line GAlaxy SUrvey with Subaru): I. Three-dimensional large-scale structures at probed with emission-line galaxies
We survey groups, filamentary large-scale structures, and voids at , , and based on the three-dimensional distribution of [O {\footnotesize II}] emission-line galaxies with stellar masses at each redshift.
PreprintHierarchical Dynamics within Molecular Clouds: Type 4 Scaling Relations of Molecular Clouds in the Second Galactic Quadrant
Together, these results are more consistent with a gravity-regulated hierarchical dynamical picture than with a purely turbulence-supported scenario.
PreprintDiscovery of an isolated RELHIC Candidate: J1351+0039
We report the discovery of J1351+0039, a new isolated dark galaxy candidate identified through a blind HI survey with the Five-hundred-meter Aperture Spherical radio Telescope (FAST), combined with deep optical imaging from the DESI Legacy Survey.
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