173 citations · 856 across the 40 of their papers we have counts for
41 papers
Non-Thermal Physics Drives Compact, Self-Regulated Galaxy Morphologies at Cosmic Dawn
Michelle S. Park, Sergio Martin-Alvarez, Risa H. Wechsler
James Webb Space Telescope (JWST) has discovered unexpectedly bright, rapidly growing galaxies in the early universe, which were not predicted by most previously existing galaxy fo…
The Azahar Project: Non-Thermal Physics Drives Star Formation Burstiness and the Evolution of the UV Luminosity Density at Cosmic Dawn
Sergio Martin-Alvarez, Risa H. Wechsler, Debora Sijacki
JWST observations, which have pushed the discovery and characterization of galaxies to cosmic dawn, have revealed significant deficiencies in state-of-the-art galaxy formation simu…
ReplicationBench: Can AI Agents Replicate Astrophysics Research Papers?
Christine Ye, Sihan Yuan, Suchetha Cooray +10
Frontier AI agents show increasing promise as scientific research assistants, and may eventually be useful for extended, open-ended research workflows. However, in order to use age…
MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon
Corentin Cadiou, Harley Katz, Martin P. Rey +22
We present three cosmological radiation-hydrodynamic zoom simulations of the progenitor of a Milky Way-mass galaxy from the MEGATRON suite. The simulations combine on-the-fly radia…
MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations
Harley Katz, Martin P. Rey, Corentin Cadiou +21
We present the MEGATRON suite of cosmological radiation hydrodynamics simulations following the formation of Milky Way-mass galaxies from the earliest cosmic epochs when Population…
The universality of the relation between magnetic fields and star formation in galaxies
Davide Belfiori, Sergio Martin-Alvarez, Enrique Lopez-Rodriguez +1
The interstellar medium (ISM) is permeated by magnetic fields that affect gas dynamics and star formation. These fields correlate with supernova (SN)-driven turbulence, but whether…
MEGATRON: how the first stars can create an iron metallicity plateau in the smallest dwarf galaxies
Martin P. Rey, Harley Katz, Corentin Cadiou +23
We study the stellar mass-iron metallicity relation of dwarf galaxies in the new high-resolution MEGATRON cosmological radiation-hydrodynamics simulations. These simulations model…
PRIMA Vista: far-infrared polarimetry to unveil small-scale magnetohydrodynamics in extragalactic observations
Diego Maglione, Sergio Martin-Alvarez, Enrique Lopez-Rodriguez +2
Magnetic fields are a fundamental part of the interstellar medium (ISM) and remain a challenge for building a comprehensive understanding of galactic properties. Their study requir…
The Emergence and Ionizing Feedback of Pop III.1 Stars as Progenitors for Supermassive Black Holes
Mahsa Sanati, Jonathan C. Tan, Julien Devriendt +9
Recent observations by JWST reveal an unexpectedly abundant population of rapidly growing supermassive black holes (SMBHs) in the early Universe, underscoring the need for improved…
Jellyfish Galaxies in Magnetic Fields: Insights from Numerical Simulations
Jaehyun Lee, Taysun Kimm, Jérémy Blaizot +5
Jellyfish galaxies provide direct evidence of ram pressure stripping in cluster environments. We investigate the role of magnetic fields in the formation of jellyfish galaxies with…
On the rapid growth of SMBHs in high-z galaxies: the aftermath of Population III.1 stars
Mahsa Sanati, Julien Devriendt, SergioMartin-Alvarez +2
The vast amount of energy released by active galactic nuclei (AGN) is increasingly recognized as a key driver of evolution not only in massive galaxies and clusters, but also in lo…
The Pandora project. II: how non-thermal physics drives bursty star formation and temperate mass-loaded outflows in dwarf galaxies
Sergio Martin-Alvarez, Debora Sijacki, Martin G. Haehnelt +11
Dwarf galaxies provide powerful laboratories for studying galaxy formation physics. Their early assembly, shallow gravitational potentials, and bursty, clustered star formation his…
The impact of cosmic ray feedback during the epoch of reionisation
Marion Farcy, Joakim Rosdahl, Yohan Dubois +5
Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role of cosmic ray (CR) feedback in galaxy evolution and reionisation, by examining it…
Constraints on Primordial Magnetic Fields from the Lyman-α forest
Mak Pavičević, Vid Iršič, Matteo Viel +5
We present the first constraints on primordial magnetic fields from the Lyman- forest using full cosmological hydrodynamic simulations. At the scales and redshifts probed by the…
Extended red wings and the visibility of reionization-epoch Lyman- emitters
Yuxuan Yuan, Sergio Martin-Alvarez, Martin G. Haehnelt +4
The visibility of the Lyman- (Ly) emission from reionization-epoch galaxies depends sensitively on the extent of the intrinsic \lya emission redwards of 1215.67~Å. The promin…
Increased Burstiness at High Redshift in Multi-Physics Models Combining Supernova Feedback, Radiative Transfer and Cosmic Rays
Tibor Dome, Sergio Martin-Alvarez, Sandro Tacchella +2
We study star formation variability, or burstiness, as a method to constrain and compare different galaxy formation models at high redshift using the Azahar simulation suite. The m…
The fallibility of equipartition magnetic field strengths from synchrotron emission using synthetically observed galaxies
Tara Dacunha, Sergio Martin-Alvarez, Susan E. Clark +1
Understanding the role that magnetic fields play on the stage of galaxy formation requires accurate methods for inferring the properties of extragalactic magnetic fields. Radio syn…
Stirring the cosmic pot: how black hole feedback shapes the matter power spectrum in the Fable simulations
Sergio Martin-Alvarez, Vid Iršič, Sophie Koudmani +3
Understanding the impact of baryonic physics on cosmic structure formation is crucial for accurate cosmological predictions, especially as we usher in the era of large galaxy surve…
Dwarf galaxies as a probe of a primordially magnetized Universe
Mahsa Sanati, Sergio Martin-Alvarez, Jennifer Schober +3
The true nature of primordial magnetic fields (PMFs) and their role in the formation of galaxies still remains elusive. To shed light on these unknowns, we investigate their impact…
Ly emission as a sensitive probe of feedback-regulated LyC escape from dwarf galaxies
Yuxuan Yuan, Sergio Martin-Alvarez, Martin G. Haehnelt +2
Ly emission is an exceptionally informative tracer of the life cycle of evolving galaxies and the escape of ionising photons. However, theoretical studies of Ly emission are…
Extragalactic Magnetism with SOFIA (SALSA Legacy Program). VII. A Tomographic View of Far-infrared and Radio Polarimetric Observations through MHD Simulations of Galaxies
Sergio Martin-Alvarez, Enrique Lopez-Rodriguez, Tara Dacunha +17
The structure of magnetic fields in galaxies remains poorly constrained, despite the importance of magnetism in the evolution of galaxies. Radio synchrotron and far-infrared (FIR)…
The impact of cosmic rays on the interstellar medium and galactic outflows of Milky Way analogues
Francisco Rodríguez Montero, Sergio Martin-Alvarez, Adrianne Slyz +3
During the last decade, cosmological simulations have managed to reproduce realistic and morphologically diverse galaxies, spanning the Hubble sequence. Central to this success was…
Deciphering Lyman- Emission Deep into the Epoch of Reionisation
Callum Witten, Nicolas Laporte, Sergio Martin-Alvarez +18
During the epoch of reionisation the first galaxies were enshrouded in pristine neutral gas, with one of the brightest emission lines in star-forming galaxies, Lyman- (Ly), e…
Extragalactic magnetism with SOFIA (SALSA Legacy Program) -- V: First results on the magnetic field orientation of galaxies
Alejandro S. Borlaff, Enrique Lopez-Rodriguez, Rainer Beck +13
We present the analysis of the magnetic field (-field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations. We use the first…