Astrophysics of Galaxies Papers of the Week

This study presents a novel hybrid framework that integrates Physics-Informed Neural Networks (PINNs) with boosting methods to enhance the accuracy and robustness of solutions for Lane-Emden type differential equations.

Here, we forecast the number counts of galaxies emitting [OII], H\b{eta}, [OIII], H{\alpha} and Pa\b{eta} lines in the Euclid Wide Survey (EWS) and Deep Survey (EDS).

We aim to present a systematic analysis of the spectropolarimetric properties of a sample of 39 active galactic nuclei (AGNs) and Sagittarius A* observed with the Atacama Large Millimeter/submillimeter Array during five VLBI campaigns between 2017 and 2023.

Abstract We present the largest statistical spectroscopic sample of radio quasars at 4.7 ≤ z ≤ 6.7 to date.

We investigate the nuclear regions of eight nearby representative LLAGN, the ReveaLLAGN sample: M87, M104, M94, M81, NGC1052, NGC4258, NGC5128 and NGC4395.

In this work, we construct a two-dimensional potential energy surface (PES) for the $\mathrm{HC}_5\mathrm{NH}^+$--He system at the CCSD(T)-F12B/cc-pVTZ-F12 level of theory.

We develop a cross-modal machine-learning framework that combines matched NIRCam imaging and NIRSpec/PRISM spectroscopy to transfer spectroscopic information into imaging-based representations, enabling LRD identification from JWST/NIRCam imaging alone.

An astronomical search based on these spectroscopic parameters yielded no detection, suggesting a possible ``missing triphenylene'' anomaly: despite its exceptional thermodynamic stability, this fully benzenoid PAH may be relatively depleted in TMC-1. To rationalize this behavior, we introduce a ring-node graphic representation that classifies PAH skeletons by topology; within this framework, triphenylene, whose compactness is otherwise ambiguous, is classified as non-compact.

We report the discovery of the Seyfert galaxy J234728.73+242745.7 as a recurrent intermediate-type CLAGN with extreme optical/UV variability.

Around supermassive black holes, however, orbiting stars and compact objects act as a perturbation that drains energy from the cloud, potentially preventing its formation altogether. In this work, we quantify under what conditions this happens, focusing on bound-free state transitions.

We use deep JWST/NIRSpec spectroscopy from the DIVER program to measure Ly$\alpha$ in 12 compact broad-line emitters (CBEs) at $z=4.2$--5.5 in GOODS-N.

We propose science cases exploiting \textsc{SHARP}, a multi-mode near-infrared spectrograph for Extremely Large Telescopes and future space facilities.

We use archival HST/WFC3 F275W imaging to study 70 barred galaxies and 95 unbarred control galaxies matched in stellar mass, optical color, redshift, and F275W background noise.

Our objective is to investigate the substructure in three dimensions and the bulk motion of the halo up to distances well exceeding the limit of the Gaia parallaxes.

Differences in the measured tip of the anchor galaxy NGC 4258 add a coherent shift in the distance scale. The challenge shows how different choices within a common framework can produce substantially different values of $H_0$, and provides an open basis for tracing these differences and for making datasets and tools more transparent and accessible.

With the JWST Cycle 3 program OASIS (GO 5997), we searched for such galaxies deliberately, using deep 28-hour NIRSpec/PRISM spectroscopy across the full burst cycle at z>4. We identify three mini-quenched galaxies with log(M*/Msun) = 8.3-8.9 and no detectable Balmer emission, at least 1.2-1.7 dex below the star-forming main sequence (SFMS), five lulling galaxies with weak Balmer emission above the quenching threshold, and 17 nearly-main-sequence galaxies just below the SFMS.

Models of bursty star formation in low-mass (10^8-10^9.5 Msun) galaxies at z>4 differ most in the suppressed phases: what drives the decline, how fast star formation falls, and how long it stays low. OASIS Paper I showed that such quiet galaxies are common and old; here we measure how they got there and how their ionized gas responds.

We employ JWST/NIRSpec MSA PRISM spectroscopy together with NIRCam imaging to investigate the impact of star-formation variability on galaxy sizes for a representative sample of 51 galaxies at $z\geq4$.

We present a systematic study of the faint outer light profiles of star-forming galaxies using deep JWST/NIRCam imaging from the CEERS, JADES, and PRIMER surveys.