A 1.75 kpc/h Separation Dual AGN at z=0.36 in the COSMOS Field (2009)
Comerford, Julia M., Griffith, Roger L., Gerke, Brian F., Cooper, Michael C., Newman, Jeffrey A., Davis, Marc, ...
We present strong evidence for dual active galactic nuclei (AGN) in the z=0.36 galaxy COSMOS J100043.15+020637.2. COSMOS Hubble Space Telescope (HST) imaging of the galaxy shows a tidal tail,...
Inspiralling Supermassive Black Holes: A New Signpost for Galaxy Mergers (2008)
Comerford, Julia M., Gerke, Brian F., Newman, Jeffrey A., Davis, Marc, Yan, Renbin, Cooper, Michael C., ...
Because structure in the Universe is built up through galaxy mergers and nearly all galaxies host a central supermassive black hole (SMBH), some galaxies should possess two SMBHs near their centers...
Comparisons between isothermal and NFW mass profiles for strong-lensing galaxy clusters (2008)
Shu, Chenggang, Zhou, Binglu, Bartelmann, Matthias, Comerford, Julia M., Mellier, Yannick
While both isothermal and NFW-based mass models for galaxy clusters are widely adopted in strong-lensing studies, they cannot easily be distinguished based solely on observed positions of arcs and...
The Observed Concentration-Mass Relation for Galaxy Clusters (2007)
Comerford, Julia M., Natarajan, Priyamvada
The properties of clusters of galaxies offer key insights into the assembly process of structure in the universe. Numerical simulations of cosmic structure formation in a hierarchical, dark matter...
Mass Distributions of HST Galaxy Clusters from Gravitational Arcs (2005)
Comerford, Julia M., Meneghetti, Massimo, Bartelmann, Matthias, Schirmer, Mischa
Although N-body simulations of cosmic structure formation suggest that dark matter halos have density profiles shallower than isothermal at small radii and steeper at large radii, whether observed...
Constraining the Redshift z=6 Quasar Luminosity Function Using Gravitational Lensing (2002)
Comerford, Julia M., Haiman, Zoltan, Schaye, Joop
Recent discoveries by the Sloan Digital Sky Survey (SDSS) of four bright redshift z=6 quasars could constrain the mechanism by which the supermassive black holes powering these sources are assembled....
Antibias in Clusters: The Dependence of M/L on Cluster Temperature (2001)
Bahcall, Neta A., Comerford, Julia M.
We show that the observed mass-to-light ratio of galaxy clusters increases with cluster temperature as expected from cosmological simulations. Contrary to previous observational suggestions, we find...