Browsing Research publications by Author "Lovell, Christopher C."

Now showing items 1-6 of 6

    • The BPT Diagram in Cosmological Galaxy Formation Simulations: Understanding the Physics Driving Offsets at High Redshift 

      Garg, Prerak; Narayanan, Desika; Byler, Nell; Sanders, Ryan L.; Shapley, Alice E.; Strom, Allison L.; Davé, Romeel; Hirschmann, Michaela; Lovell, Christopher C.; Otter, Justin; Popping, Gergö; Privon, George C. (2022-02-15)
      The Baldwin, Philips, & Terlevich diagram of [O iii]/Hβ versus [N ii]/Hα (hereafter N2-BPT) has long been used as a tool for classifying galaxies based on the dominant source of ionizing radiation. Recent observations have ...

    • Chaotic and Clumpy Galaxy Formation in an Extremely Massive Reionization-era Halo 

      Spilker, Justin S.; Hayward, Christopher C.; Marrone, Daniel P.; Aravena, Manuel; Béthermin, Matthieu; Burgoyne, James; Chapman, Scott C.; Greve, Thomas R.; Gururajan, Gayathri; Hezaveh, Yashar D.; Hill, Ryley; Litke, Katrina C.; Lovell, Christopher C.; Malkan, Matthew A.; Murphy, Eric J.; Narayanan, Desika; Phadke, Kedar A.; Reuter, Cassie; Stark, Antony A.; Sulzenauer, Nikolaus; Vieira, Joaquin D.; Vizgan, David; Weiß, Axel (2022-04-08)
      Abstract: The SPT 0311–58 system at z = 6.900 is an extremely massive structure within the reionization epoch and offers a chance to understand the formation of galaxies at an extreme peak in the primordial density field. ...

    • The JWST Hubble Sequence: The Rest-frame Optical Evolution of Galaxy Structure at 1.5 < z < 6.5 

      Ferreira, Leonardo; Conselice, Christopher J.; Sazonova, Elizaveta; Ferrari, Fabricio; Caruana, Joseph; Tohill, Clár-Bríd; Lucatelli, Geferson; Adams, Nathan; Irodotou, Dimitrios; Marshall, Madeline A.; Roper, Will J.; Lovell, Christopher C.; Verma, Aprajita; Austin, Duncan; Trussler, James; Wilkins, Stephen M. (2023-10-01)
      We present results on the morphological and structural evolution of a total of 3956 galaxies observed with JWST at 1.5 < z < 6.5 in the JWST CEERS observations that overlap with the CANDELS EGS field. This is the biggest ...

    • Reproducing sub-millimetre galaxy number counts with cosmological hydrodynamic simulations 

      Lovell, Christopher C.; Geach, James E.; Davé, Romeel; Narayanan, Desika; Li, Qi (2021-01-04)
      Matching the number counts of high-$z$ sub-millimetre-selected galaxies (SMGs) has been a long standing problem for galaxy formation models. In this paper, we use 3D dust radiative transfer to model the sub-mm emission ...

    • Robust Field-level Likelihood-free Inference with Galaxies 

      de Santi, Natalí S. M.; Shao, Helen; Villaescusa-Navarro, Francisco; Abramo, L. Raul; Teyssier, Romain; Villanueva-Domingo, Pablo; Ni, Yueying; Anglés-Alcázar, Daniel; Genel, Shy; Hernández-Martínez, Elena; Steinwandel, Ulrich P.; Lovell, Christopher C.; Dolag, Klaus; Castro, Tiago; Vogelsberger, Mark (2023-07-18)
      We train graph neural networks to perform field-level likelihood-free inference using galaxy catalogs from state-of-the-art hydrodynamic simulations of the CAMELS project. Our models are rotational, translational, and ...

    • A Universal Equation to Predict Ω m from Halo and Galaxy Catalogs 

      Shao, Helen; de Santi, Natalí S. M.; Villaescusa-Navarro, Francisco; Teyssier, Romain; Ni, Yueying; Anglés-Alcázar, Daniel; Genel, Shy; Steinwandel, Ulrich P.; Hernández-Martínez, Elena; Dolag, Klaus; Lovell, Christopher C.; Garrison, Lehman H.; Visbal, Eli; Kulkarni, Mihir; Hernquist, Lars; Castro, Tiago; Vogelsberger, Mark (2023-10-18)
      We discover analytic equations that can infer the value of Ωm from the positions and velocity moduli of halo and galaxy catalogs. The equations are derived by combining a tailored graph neural network (GNN) architecture ...