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Introducing Decorated HODs: modeling assembly bias in the galaxy-halo connection
Andrew P. Hearin, Andrew R. Zentner, Frank C. van den Bosch +2
The connection between galaxies and dark matter halos is often inferred from data using probabilistic models, such as the Halo Occupation Distribution (HOD). Conventional HOD formu…
The Scale-Dependence of Halo Assembly Bias
Tomomi Sunayama, Andrew P. Hearin, Nikhil Padmanabhan +1
The two-point clustering of dark matter halos is influenced by halo properties besides mass, a phenomenon referred to as halo assembly bias. Using the depth of the gravitational po…
Connecting massive galaxies to dark matter halos in BOSS - I. Is galaxy color a stochastic process in high-mass halos?
Shun Saito, Alexie Leauthaud, Andrew P. Hearin +9
We use subhalo abundance matching (SHAM) to model the stellar mass function (SMF) and clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) "CMASS" sample at .…
Assessing Colour-dependent Occupation Statistics Inferred from Galaxy Group Catalogues
Duncan Campbell, Frank C van den Bosch, Andrew Hearin +5
We investigate the ability of current implementations of galaxy group finders to recover colour-dependent halo occupation statistics. To test the fidelity of group catalogue inferr…
On the Physical Origin of Galactic Conformity
Andrew P. Hearin, Peter S. Behroozi, Frank C. van den Bosch
Correlations between the star formation rates (SFRs) of nearby galaxies (so-called galactic conformity) have been observed for projected separations up to 4 Mpc, an effect not pred…
Using Galaxy Pairs to Probe Star Formation During Major Halo Mergers
Peter S. Behroozi, Guangtun Zhu, Henry C. Ferguson +8
Currently-proposed galaxy quenching mechanisms predict very different behaviours during major halo mergers, ranging from significant quenching enhancement (e.g., clump-induced grav…
Assembly Bias & Redshift-Space Distortions: Impact on cluster dynamics tests of general relativity
Andrew P. Hearin
The redshift-space distortion (RSD) of galaxies surrounding massive clusters is emerging as a promising testbed for theories of modified gravity. Conventional applications of this…