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The lifetimes and properties of Little Red Dots in the AMBRA simulation
Patrick LaChance, Yihao Zhou, Aklant Kumar Bhowmick +6
We identify and analyze the little red dots (LRDs) in the AMBRA cosmological hydrodynamic simulation, by producing mock observations of the galaxies and active galactic nuclei (AGN…
Theoretical emission lines and metallicity calibrations of H II regions in ASTRID simulation
Yao Yao, Kathryn Grasha, Stuart Wyithe +5
We present a theoretical framework to derive redshift-dependent metallicity calibrations for galaxies at =2-7. The ionization parameter () and gas pressure () in our appro…
Cosmic Pairs: A DESI Census of Dual and Offset AGN as Precursors to Massive Black Hole Binaries
Ekaterine Dadiani, Antonella Palmese, Yihao Zhou +52
We present a systematic census of dual and offset active galactic nuclei (AGN) using spectroscopic data from the first data release (DR1) of the Dark Energy Spectroscopic Instrumen…
Supermassive Black Hole Assembly from Heavy Seeds with Dynamical Friction in the BRAHMA Simulations: Implications for JWST, LISA, and the Local Universe
Aklant K. Bhowmick, Laura Blecha, Paul Torrey +8
The JWST discoveries of supermassive black holes (BHs) at may provide key insights into their seeding origins. Using new BRAHMA cosmological sim…
The Galaxy Luminosity Functions in ASTRID: Predictions for LSST
Fatemeh Hafezianzadeh, Tianqing Zhang, Paul Rogozenski +6
We present validated and forward-modelled galaxy luminosity functions and photometric predictions for the Vera C. Rubin Observatory Legacy Survey of Space and Time using the ASTRID…
Matter Clustering in Astrid: Reduced Baryonic Suppression from Realistic Black Hole Dynamics
Yanhui Yang, Simeon Bird, Yihao Zhou +4
Baryonic feedback from active galactic nuclei (AGN) is often invoked as a major source of suppression in the matter power spectrum, with implications for precision cosmology and th…
The ASTRID Simulation at z=0: From Massive Black Holes to Large-scale Structure
Yihao Zhou, Tiziana Di Matteo, Simeon Bird +7
We present the results for the cosmological simulation ASTRID. Hosting 0.33 trillion particles in a box of per side, ASTRID is one o…
Quantifying biases in stellar masses of JWST high-z quasar host galaxies caused by quasar subtraction
Sabrina Berger, Madeline A. Marshall, J. Stuart B. Wyithe +4
JWST has enabled dozens of high- quasar host galaxy detections. Many of these observations imply galaxies with black holes that are overmassive compared to their low- counter…
Active Galactic Nuclei and Host Galaxies in COSMOS-Web. II. First Look at the Kpc-scale Dual and Offset AGN Population
Junyao Li, Ming-Yang Zhuang, Yue Shen +3
Kpc-scale dual and offset Active Galactic Nuclei (AGNs) are signposts of accreting supermassive black holes (SMBHs) triggered during late-stage galaxy mergers, offering crucial ins…
Astrometric Jitter as a Detection Diagnostic for Recoiling and Slingshot Supermassive Black Hole Candidates
Anavi Uppal, Charlotte Ward, Suvi Gezari +4
Supermassive black holes (SMBHs) can be ejected from their galactic centers due to gravitational wave recoil or the slingshot mechanism following a galaxy merger. If an ejected SMB…
The evolution of galaxy morphology from redshift z=6 to 3: Mock JWST observations of galaxies in the ASTRID simulation
Patrick LaChance, Rupert Croft, Yueying Ni +3
We present mock JWST observations for more than 250,000 different galaxies from the Astrid simulation with . The mock observations are made using the BPASS stellar…
Simulated host galaxy analogs of high-z quasars observed with JWST
Sabrina Berger, Madeline A. Marshall, J. Stuart B. Wyithe +3
The hosts of two low-luminosity high-z quasars, J2255+0251 and J2236+0032, were recently detected using JWST's NIRCam instrument. These represent the first high-z quasar host galax…
z~2 dual AGN host galaxies are disky: stellar kinematics in the ASTRID Simulation
Ekaterine Dadiani, Tiziana Di Matteo, Nianyi Chen +6
We study dual AGN host galaxy morphologies at using the ASTRID simulation, selecting black hole (BH) pairs with small separation (), high mass ($M_{\text{BH,12…
MAGICS I. The First Few Orbits Encode the Fate of Seed Massive Black Hole Pairs
Nianyi Chen, Diptajyoti Mukherjee, Tiziana Di Matteo +3
The elusive massive black hole (MBH) seeds stand to be revealed by the Laser Space Antenna Interferometer through mergers. As an aftermath of galaxy mergers, MBH coalescence is a v…
Fly-by galaxy encounters with multiple black holes produce star-forming linear wakes
Nianyi Chen, Patrick LaChance, Yueying Ni +4
We look for simulated star-forming linear wakes such as the one recently discovered by van Dokkum et al. (2023) in the cosmological hydrodynamical simulation ASTRID. Amongst the ru…
Over-massive Central Black Holes in the Cosmological Simulations ASTRID and Illustris TNG50
Emma Jane Weller, Fabio Pacucci, Priyamvada Natarajan +1
Recent dynamical measurements indicate the presence of a central SMBH with mass in the dwarf galaxy Leo I, placing the system times abov…
Direct formation of massive black holes via dynamical collapse in metal-enriched merging galaxies at : fully cosmological simulations
Lucio Mayer, Pedro R. Capelo, Lorenz Zwick +1
We present the results of the first fully cosmological hydrodynamical simulations studying the merger-driven model for massive black hole (BH) seed formation via direct collapse. U…
Triple and Quadruple Black Holes in the ASTRID Simulation at
Calvin Hoffman, Nianyi Chen, Tiziana Di Matteo +4
We use the ASTRID cosmological hydrodynamic simulation to investigate the properties and evolution of triple and quadruple Massive Black Hole (MBH) systems at . Only a han…
High-redshift supermassive black hole mergers in simulations with dynamical friction modelling
Colin DeGraf, Nianyi Chen, Yueying Ni +4
In the near future, projects like LISA and Pulsar Timing Arrays are expected to detect gravitational waves from mergers between supermassive black holes, and it is crucial to preci…
Orbital and Radiative Properties of Wandering Intermediate-Mass Black Holes in the ASTRID Simulation
Emma Jane Weller, Fabio Pacucci, Yueying Ni +4
Intermediate-Mass Black Holes (IMBHs) of are commonly found at the center of dwarf galaxies. Simulations and observations convincingly show that a sizable po…
Statistics of Galactic-Scale Quasar Pairs at Cosmic Noon
Yue Shen, Hsiang-Chih Hwang, Masamune Oguri +8
The statistics of galactic-scale quasar pairs can elucidate our understanding of the dynamical evolution of supermassive black hole (SMBH) pairs, the duty cycles of quasar activity…
Properties and Evolution of Dual and Offset AGN in the ASTRID Simulation at
Nianyi Chen, Tiziana Di Matteo, Yueying Ni +7
We examine the dual (both BHs active) and offset (one BH active) AGN population (comprising 2000 pairs at ) at in the AS…
The BlueTides Mock Image Catalogue: Simulated observations of high-redshift galaxies and predictions for JWST imaging surveys
Madeline A. Marshall, Katelyn Watts, Stephen Wilkins +7
We present a mock image catalogue of ~100,000 MUV=-22.5 to -19.6 mag galaxies at z=7-12 from the BlueTides cosmological simulation. We create mock images of each galaxy with the Ja…
Probing the quasars in a universe with IllustrisTNG physics: Impact of gas-based black hole seeding models
Aklant Kumar Bhowmick, Laura Blecha, Yueying Ni +6
We explore implications of a range of black hole (BH) seeding prescriptions on the formation of the brightest quasars in cosmological hydrodynamic simulations. The unde…