125 citations · 357 across the 14 of their papers we have counts for
14 papers
Molecular Gas Heating, Star Formation Rate Relations, and AGN Feedback in Infrared-luminous Galaxy Mergers
Duncan Farrah, Andreas Efstathiou, Jose Afonso +13
We examine the origin of molecular gas heating in a sample of 42 infrared-luminous galaxies at by combining two sets of archival data. First, integrated CO line luminositie…
The assembly of supermassive black holes at in early-type galaxies from scaling relations
Duncan Farrah, Athena Engholm, Evanthia Hatziminaoglou +14
The assembly of supermassive black hole (SMBH) mass () and stellar mass () in galaxies can be studied via the redshift evolution of the rela…
DESI Dark Energy Time Evolution is Recovered by Cosmologically Coupled Black Holes
Kevin S. Croker, Gregory Tarlé, Steve P. Ahlen +4
Recent baryon acoustic oscillation (BAO) measurements by the Dark Energy Spectroscopic Instrument (DESI) provide evidence that dark energy (DE) evolves with time, as parameterized…
Observational evidence for cosmological coupling of black holes and its implications for an astrophysical source of dark energy
Duncan Farrah, Kevin S. Croker, Gregory Tarlé +16
Observations have found black holes spanning ten orders of magnitude in mass across most of cosmic history. The Kerr black hole solution is however provisional as its behavior at i…
A Preferential Growth Channel for Supermassive Black Holes in Elliptical Galaxies at z<2
Duncan Farrah, Sara Petty, Kevin Croker +12
The assembly of stellar and supermassive black hole (SMBH) mass in elliptical galaxies since can help to diagnose the origins of locally-observed correlations between SMBH…
Stellar and black hole assembly in z<0.3 infrared-luminous mergers: intermittent starbursts vs. super-Eddington accretion
Duncan Farrah, Andreas Efstathiou, Jose Afonso +20
We study stellar and black hole mass assembly in a sample of 42 infrared-luminous galaxy mergers at z<0.3 by combining results from radiative transfer modelling with archival measu…
Well-defined equations of motion without constraint of external sources
Kevin S. Croker, Joel L. Weiner, Duncan Farrah
We present a new approach to constrained classical fields that enables the action formalism to dictate how external sources must enter the resulting equations of motion. If symmetr…
Cosmologically coupled compact objects: a single parameter model for LIGO--Virgo mass and redshift distributions
Kevin S. Croker, Michael J. Zevin, Duncan Farrah +2
We demonstrate a single-parameter route for reproducing higher mass objects as observed in the LIGO--Virgo mass distribution, using only the isolated binary stellar evolution chann…
Implications of Symmetry and Pressure in Friedmann Cosmology. I. Formalism
Kevin S. Croker, Joel L. Weiner
We show that derivation of Friedmann's equations from the Einstein-Hilbert action, paying attention to the requirements of isotropy and homogeneity during the variation, leads to a…
Implications of Symmetry and Pressure in Friedmann Cosmology. II. Stellar Remnant Black Hole Mass Function
Kevin Croker, Kurtis Nishimura, Duncan Farrah
We consider some observational consequences of replacing all black holes (BHs) with a class of non-singular solutions that mimic BHs but with Dark Energy (DE) interiors; GEneric Ob…
Cosmological tests of the gravastar hypothesis
K. A. S. Croker
Gravitational vacuum stars (gravastars) have become a viable theoretical alternative to the black hole (BH) end-stage of stellar evolution. These objects gravitate in vacuum like B…
A Smolin-like branching multiverse from multiscalar-tensor theory
K. A. S. Croker
We implement a Smolin-like branching multiverse through a directed, acyclic graph of metrics. Our gravitational and matter actions are indistinguishable from decoupled stat…
ngravs: Distinct gravitational interactions in GADGET-2
K. A. S. Croker
We discuss an extension of the massively parallel cosmological simulation code GADGET-2, which now enables investigation of multiple and distinct gravitational force laws, provided…
Maximum likelihood fits to a cored halo enclosing finite mass
K. A. S. Croker
The hybrid Ricci scalar formed from a Robertson-Walker derived Ricci tensor and a distinct flat space metric becomes a dark, pseudo-isothermal density under asymptot…