Astrophysics · Physics & Astronomy
Astrophysics of Galaxies
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1,212 papers, from 6 September 2026 to 5 November 2026: 1,212 arXiv preprints.
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Newest papers, page 27
Galactic warps constrain equivalence-principle violation in the dark sector
Current measurements of the expansion of the Universe allow for the presence of evolving dark energy, distinct from a cosmological constant, with an equation of state that seems to violate the null…Clumpy Outflows from Super-Eddington Accreting Black Holes. II. Conditions for Clump Formation
Active galactic nuclei (AGNs) commonly exhibit ultra-fast outflows (UFOs) with velocities of $0.03$--$0.3~c$.The Impact of an AGN on PAH Spectral Features in Galaxy Evolution Simulations: Continuum Dilution and Excitation of PAHs
Galaxies hosting an active galactic nucleus (AGN) show diminished power and non-standard spectral feature ratios from polycyclic aromatic hydrocarbons (PAHs) compared with normal star-forming…The Star Formation Histories of Different Components of M31's Halo from Photometric Estimates of Fe and $α$ Abundances
We present the chemical-abundance distributions and star-formation histories of the M31 halo components using photometric Fe and $α$ abundance estimates derived from the PAndAS broad-band $g$ and…Supermassive Black Hole Winds in X-rays -- SUBWAYS. VI. Interplay between the soft X-ray excess and ultra-fast outflows
We present a broadband, multiwavelength study of the interplay between the soft X-ray excess (SE), ultra-fast outflows (UFOs), and warm absorbers (WAs) in 21 active galactic nuclei (AGN; 0.1 <= z <=…Dust in Galaxies at $z=10-15$: Attenuation and Re-emission Predictions from the FirstLight Simulations
Dust masses and grain properties in $z>10$ galaxies remain poorly constrained, as JWST UV attenuation and ALMA dust re-emission are rarely modelled consistently.Gaia in Technicolor. I. A Simple Variability-Encoded Color-Magnitude Diagram
The Hertzsprung-Russell diagram is one of the most important tools in stellar astrophysics.Analytic and numerical study of dark matter halos in the Horndeski theory
The models of modified gravity that can explain the late-time accelerated expansion of the Universe must pass the local tests of gravity, introducing a screening mechanism so that any additional…$\texttt{GASTRO-BH}$: Effects of a Central Black Hole in GSE-like Dwarf-galaxy Mergers Around Milky Way-like Hosts
Recent evidence points to an intermediate-mass black hole (IMBH) in the most massive globular cluster of the Milky Way, $ω$ Centauri.$N$-body simulations of the open cluster M67 -- I: global cluster properties
The most recent Gaia data releases have seen the construction of many open cluster catalogues containing thousands of open clusters.How bright can a galaxy be? Extreme value predictions for high-redshift survey observables
Assessing the significance of extreme galaxy candidates has typically relied on redshifts and stellar / halo masses inferred through inverse modelling, which carries substantial systematic…Gamma-ray calorimetry of Seyfert winds
Two stacking analyses with the Fermi Large Area Telescope (LAT) detected GeV emission from radio-quiet Seyferts, one selected by an X-ray ultra-fast outflow (UFO) and one hard-X-ray-bright, with…Seeing Through the RFI Mask: DT-FISTA Inpainting of Pulsar Dynamic Spectra via Fourier Sparsity
Radio frequency interference (RFI) frequently contaminates radio observations, and excising affected samples leaves masked regions in sampled images.Extended J-band spectroscopy of red supergiants: parameter identifiability and metallicity robustness
Red supergiants (RSGs) provide a near-infrared metallicity diagnostic complementary to optical hot-supergiant spectroscopy, but their low-resolution extragalactic use requires tests of parameter…A new submillimeter Class I methanol maser at 345.903 GHz near the massive protostar S255IR NIRS3
We present results of further investigation of radio emission from the remarkable molecular core S255IR-SMA1 harboring a \(\sim\) 20 Msun young stellar object NIRS3 which exhibited a disk-mediated…Relations between optical spectral parameters and the (far-)infrared continuum in Type~1 active galactic nuclei
This study combines multi-wavelength continuum data with optical spectral properties for a far-infrared (FIR)-selected sample of Type 1 active galactic nuclei (AGNs) from AKARI data.The coordinated radio and infrared survey for high-mass star formation - VI. Higher-resolution follow-up of point-like northern ultra-compact H II regions
The CORNISH survey provided the most complete sample of ultra-compact H II (UCHII) regions in the northern Galactic plane to date, but at its 1.5 arcsec resolution the most compact, and plausibly…The GAGE survey. I. Deep multi-band stellar variability characterization and automated classification toward Baade's window
Long-term photometric surveys of the Galactic bulge are vital for characterizing its stellar populations and structure, providing a foundation for next-generation facilities.Milky Way Near Twins (MWNeTs). II. Applications of a Hierarchical Framework to NGC 3521, NGC 2903, UGC 11487, and CGCG 047-026
Galaxies resembling the Milky Way in present-day global properties may have followed different evolutionary histories.Inferring the delay time distribution of type Ia supernovae with CAALAM I: SED modelling choices and their effect on the delay time distribution
A delay time distribution (DTD) quantifies the lag between progenitor formation and the subsequent explosive event.