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On the formation of massive quiescent galaxies with diverse morphologies in the TNG50 simulation
Minjung Park, Sandro Tacchella, Erica J. Nelson +7
Observations have shown that the star-formation activity and the morphology of galaxies are closely related, but the underlying physical connection is not well understood. Using th…
H-alpha emission in local galaxies: star formation, time variability and the diffuse ionized gas
Sandro Tacchella, Aaron Smith, Rahul Kannan +6
The nebular recombination line H is widely used as a star-formation rate (SFR) indicator in the local and high-redshift Universe. We present a detailed H radiative transfer s…
Supermassive black holes in cosmological simulations II: the AGN population and predictions for upcoming X-ray missions
Melanie Habouzit, Rachel S. Somerville, Yuan Li +13
In large-scale hydrodynamical cosmological simulations, the fate of massive galaxies is mainly dictated by the modeling of feedback from active galactic nuclei (AGN). The amount of…
The physics of Lyman-alpha escape from disc-like galaxies
Aaron Smith, Rahul Kannan, Sandro Tacchella +8
Hydrogen emission lines can provide extensive information about star-forming galaxies in both the local and high-redshift Universe. We present a detailed Lyman continuum (LyC), Lym…
Early-type galaxy density profiles from IllustrisTNG: III. Effects on outer kinematic structure
Yunchong Wang, Shude Mao, Mark Vogelsberger +10
Early-type galaxies (ETGs) possess total density profiles close to isothermal, which can lead to non-Gaussian line-of-sight velocity dispersion (LOSVD) under anisotropic stellar or…
Inferring halo masses with Graph Neural Networks
Pablo Villanueva-Domingo, Francisco Villaescusa-Navarro, Daniel Anglés-Alcázar +7
Understanding the halo-galaxy connection is fundamental in order to improve our knowledge on the nature and properties of dark matter. In this work we build a model that infers the…
Galaxy Formation in the Santa Cruz semi-analytic model compared with IllustrisTNG -- I. Galaxy scaling relations, dispersions, and residuals at z=0
Austen Gabrielpillai, Rachel S. Somerville, Shy Genel +4
We present the first results from applying the Santa Cruz semi-analytic model (SAM) for galaxy formation on merger trees extracted from a dark matter only version of the IllustrisT…
Modeling the galaxy-halo connection with machine learning
Ana Maria Delgado, Digvijay Wadekar, Boryana Hadzhiyska +3
To extract information from the clustering of galaxies on non-linear scales, we need to model the connection between galaxies and halos accurately and in a flexible manner. Standar…
Mass of the dynamically hot inner stellar halo predicts the ancient accreted stellar mass
Ling Zhu, Annalisa Pillepich, Glenn van de Ven +6
Galactic dynamical structures are fossil records of the assembly histories of galaxies. By analyzing the cosmological hydrodynamical simulation TNG50, we find that a dynamical stru…
The evolution of the barred galaxy population in the TNG50 simulation
Yetli Rosas-Guevara, Silvia Bonoli, Massimo Dotti +8
We use the magnetic-hydrodynamical simulation TNG50 to study the evolution of barred massive disc galaxies. Massive spiral galaxies are already present as early as , and bar f…
Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
R. Kannan, E. Garaldi, A. Smith +4
We introduce the THESAN project, a suite of large volume (L = 95.5 cMpc) radiation-magnetohydrodynamic simulations that simultaneously model the large-scale statistical properties…
AGN and Star Formation at Cosmic Noon: Comparison of Data to Theoretical Models
Jonathan Florez, Shardha Jogee, Yuchen Guo +14
In theoretical models of galaxy evolution, AGN and star formation (SF) activity are closely linked and AGN feedback is routinely invoked to regulate galaxy growth. In order to cons…
Predictions for anisotropic X-ray signatures in the circumgalactic medium: imprints of supermassive black hole driven outflows
Nhut Truong, Annalisa Pillepich, Dylan Nelson +2
The circumgalactic medium (CGM) encodes signatures of the galaxy-formation process, including the interaction of galactic outflows driven by stellar and supermassive black hole (SM…
Finding universal relations in subhalo properties with artificial intelligence
Helen Shao, Francisco Villaescusa-Navarro, Shy Genel +7
We use a generic formalism designed to search for relations in high-dimensional spaces to determine if the total mass of a subhalo can be predicted from other internal properties s…
Quiescent Ultra-diffuse galaxies in the field originating from backsplash orbits
José A. Benavides, Laura V. Sales, Mario. G. Abadi +8
Ultra-diffuse galaxies (UDGs) are the lowest-surface brightness galaxies known, with typical stellar masses of dwarf galaxies but sizes similar to larger galaxies like the Milky Wa…
From large-scale environment to CGM angular momentum to star forming activities -- I: star-forming galaxies
Sen Wang, Dandan Xu, Shengdong Lu +5
The connection between halo gas acquisition through the circumgalactic medium (CGM) and galaxy star formation has long been studied. In this series of two papers, we put this inter…
From large-scale environment to CGM angular momentum to star forming activities -- II: quenched galaxies
Shengdong Lu, Dandan Xu, Sen Wang +7
The gas needed to sustain star formation in galaxies is supplied by the circumgalactic medium (CGM), which in turn is affected by accretion from large scales. In a series of two pa…
The impact of galactic feedback on the shapes of dark-matter haloes
Kun Ting Eddie Chua, Mark Vogelsberger, Annalisa Pillepich +1
We quantify the impact of galaxy formation on dark matter halo shapes using cosmological simulations at redshift . The haloes are drawn from the IllustrisTNG project, a suite…
Galaxy assembly bias and large-scale distribution: a comparison between IllustrisTNG and a semi-analytic model
Boryana Hadzhiyska, Sonya Liu, Rachel S. Somerville +4
In this work, we compare large scale structure observables for stellar mass selected samples at , as predicted by two galaxy models, the hydrodynamical simulation IllustrisTNG…
Quenched, bulge-dominated, but dynamically cold galaxies in IllustrisTNG and their real-world counterparts
Shengdong Lu, Dandan Xu, Sen Wang +5
Galaxy morphologies, kinematics, and stellar populations are thought to be linked to each other. However, both simulations and observations have pointed out mismatches therein. In…
Impact of gas spin and Lyman-Werner flux on black hole seed formation in cosmological simulations: implications for direct collapse
Aklant K. Bhowmick, Laura Blecha, Paul Torrey +5
Direct collapse black holes~(BH) are promising candidates for producing massive quasars, but their formation requires fine-tuned conditions. In this work, we use cosmo…
Anisotropic satellite galaxy quenching modulated by supermassive black hole activity
Ignacio Martín-Navarro, Annalisa Pillepich, Dylan Nelson +4
The evolution of satellite galaxies is shaped by their constant interaction with the circum galactic medium surrounding central galaxies, which in turn may be affected by gas and e…
X-ray bubbles in the circumgalactic medium of TNG50 Milky Way- and M31-like galaxies: signposts of supermassive black hole activity
Annalisa Pillepich, Dylan Nelson, Nhut Truong +5
The TNG50 cosmological simulation produces X-ray emitting bubbles, shells, and cavities in the circumgalactic gas above and below the stellar disks of Milky Way- and Andromeda-like…
Impact of gas based seeding on supermassive black hole populations at
Aklant K. Bhowmick, Laura Blecha, Paul Torrey +6
Deciphering the formation of supermassive black holes~(SMBHs) is a key science goal for upcoming observational facilities. In most theoretical channels proposed so far, the seed fo…