Columbia University

The dark matter wake of a galactic bar revealed by multichannel Singular Spectral Analysis

Jason A. S. Hunt, Michael S. Petersen, Martin D. Weinberg +7

The Milky Way is known to contain a stellar bar, as are a significant fraction of disc galaxies across the universe. Our understanding of bar evolution, both theoretically and thro…

Transferring Data from a Voronoi Mesh to an Adaptive Cartesian Grid in Pursuit of Self-consistent Top-down Star Formation

Sean C. Lewis, Brooke Polak, Mordecai-Mark Mac Low +5

Unstructured Voronoi mesh simulations offer many advantages for simulating self-gravitating gas dynamics on galactic scales. Adaptive mesh refinement (AMR) can be a powerful tool f…

Flexible Simulation Based Inference for Galaxy Photometric Fitting with Synthesizer

Thomas Harvey, Christopher C. Lovell, Sophie Newman +13

We introduce Synference, a new, flexible Python framework for galaxy SED fitting using simulation-based inference (SBI). Synference leverages the Synthesizer package for flexible f…

EDGE-INFERNO: How chemical enrichment assumptions impact the individual stars of a simulated ultra-faint dwarf galaxy

Eric P. Andersson, Martin P. Rey, Robert M. Yates +6

The chemical abundances of stars in galaxies are a fossil record of the star formation and stellar evolution processes that regulate galaxy formation, including the stellar initial…

RIGEL: Feedback-regulated cloud-scale star formation efficiency in a simulated dwarf galaxy merger

Yunwei Deng, Hui Li, Federico Marinacci +5

Major mergers of galaxies are likely to trigger bursty star formation activities. The accumulation of dense gas and the boost of star formation efficiency (SFE) are considered to b…

CHILES X: Molecular and atomic gas at intermediate redshift

Kelley M. Hess, John Hibbard, Jennifer Donovan Meyer +10

We present ALMA CO observations of 14 HI-detected galaxies from the CHILES survey found in a cosmic over-density at z~0.12. This is the largest collection of spatially resolved CO…

astro-ph.GA2025★ 3 cited

The JWST Emission Line Survey (JELS): The sizes and merger fraction of star-forming galaxies during the Epoch of Reionization

H. M. O. Stephenson, J. P. Stott, C. A. Pirie +18

We used observations from the JWST Emission Line Survey (JELS) to measure the half-light radii ( $r_{e}$ ) of 23 H $α$ -emitting star-forming (SF) galaxies at $z = 6.1$ in the PRIMER/COS…

astro-ph.GA2025★ 5 cited

Probing the Star Formation Main Sequence down to 10 $^{7} M_{⊙}$ at $1 < z < 9$

Rosa M. Mérida, Marcin Sawicki, Kartheik G. Iyer +12

The Main Sequence of Star-Forming Galaxies (SFGMS or MS) is a fundamental scaling relation that provides a global framework for studying galaxy formation and evolution, as well as…

A Comparison of Full Spectral Fitting Codes for Measuring the Stellar Initial Mass Function and Other Stellar Population Properties in Elliptical Galaxies

Ilaria Lonoce, Anja Feldmeier-Krause, Alexandra Masegian +1

We present a comparative test of four widely used full spectral fitting codes, with the aim of answering the question: how robust is the retrieval of the stellar initial mass funct…

X-ray Halos of Early-Type Galaxies with AGN Feedback and Accretion from a Circumgalactic Medium: models and observations

Silvia Pellegrini, Luca Ciotti, Zhaoming Gan +2

The knowledge of the X-ray properties of the hot gas halos of early-type galaxies has significantly advanced in the past years, for large and homogeneously investigated samples. We…

astro-ph.GA2025★ 6 cited

Mapping the Distant and Metal-Poor Milky Way with SDSS-V

Vedant Chandra, Phillip A. Cargile, Alexander P. Ji +28

The fifth-generation Sloan Digital Sky Survey (SDSS-V) is conducting the first all-sky low-resolution spectroscopic survey of the Milky Way's stellar halo. We describe the stellar…

Centrally concentrated star formation in young clusters

Adilkhan Assilkhan, Mordecai-Mark Mac Low, Brooke Polak +6

The study of star cluster evolution necessitates modeling how their density profiles develop from their natal gas distribution. Observational evidence indicates that many star clus…

astro-ph.GA2025★ 29 cited

Simulating High-Velocity Clouds in the Observational Plane: An Initial Study with the Smith Cloud

Lori E. Porter, Matthew Abruzzo, Greg L. Bryan +3

High-velocity clouds (HVCs) may fuel future star formation in the Milky Way, but they must first survive their passage through the hot halo. While recent work has improved our unde…

astro-ph.GA2025★ 4 cited

Introducing the Descriptive Parametric Model: Gaseous Profiles for Galaxies, Groups, and Clusters

Benjamin D. Oppenheimer, G. Mark Voit, Yannick M. Bahé +14

We develop and present the Descriptive Parametric Model (DPM), a tool for generating profiles of gaseous halos (pressure, electron density, and metallicity) as functions of radius,…

Density modulated star formation efficiency: implications for the observed abundance of ultra-violet luminous galaxies at z>10

Rachel S. Somerville, L. Y. Aaron Yung, Lachlan Lancaster +3

The number density of UV luminous galaxies discovered by the James Webb Space Telescope at ultra high redshift ( $z ≳ 10$ ) is higher, and declines much more slowly with increa…

astro-ph.GA2025★ 12 cited

Simultaneously Modelling Dusty Star Forming Galaxies and Massive Quiescents: A Calibration Framework for Galaxy Formation Models

Pablo Araya-Araya, Rachel K. Cochrane, Christopher C. Hayward +4

Galaxy formation models, particularly semi-analytic models (SAMs), rely on differential equations with free parameters to describe the physical mechanisms governing galaxy formatio…

Shaping the Milky Way: The interplay of mergers and cosmic filaments

Arpit Arora, Nicolás Garavito-Camargo, Robyn E. Sanderson +12

The large-scale morphology of Milky Way (MW)-mass dark matter (DM) halos is shaped by two key processes: filamentary accretion from the cosmic web and interactions with massive sat…

astro-ph.GA2025★ 13 cited

ΛCDM is still not broken: empirical constraints on the star formation efficiency at z ~ 12-30

L. Y. Aaron Yung, Rachel S. Somerville, Kartheik G. Iyer

The James Webb Space Telescope continues to push back the redshift frontier to ever earlier cosmic epochs, with recent announcements of galaxy candidates at redshifts of $15 \lesss…

astro-ph.GA2025★ 17 cited

Core collapse in resonant self-interacting dark matter across two decades in halo mass

Vinh Tran, Xuejian Shen, Daniel Gilman +5

Core collapse, a process associated with self-interacting dark matter (SIDM) models, can increase the central density of halos by orders of magnitude with observable consequences f…

Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel'dovich effect from DESI Y1 x ACT

Bernardita Ried Guachalla, Emmanuel Schaan, Boryana Hadzhiyska +58

The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-…

The Optical and Infrared Are Connected

Christian K. Jespersen, Peter Melchior, David N. Spergel +3

Galaxies are often modelled as composites of separable components with distinct spectral signatures, implying that different wavelength ranges are only weakly correlated. They are…

astro-ph.GA2025★ 3 cited

Applying a star formation model calibrated on high-resolution interstellar medium simulations to cosmological simulations of galaxy formation

Jan D. Burger, Volker Springel, Eve C. Ostriker +11

Modern high-resolution simulations of the interstellar medium (ISM) have shown that key factors in governing star formation are the competing influences of radiative dissipation, p…