# Biography

I am a Graduate Fellow in the Department of Astronomy at The Ohio State University working with Professor David Weinberg on a variety of topics related to cosmology and the galaxy-halo connection. Currently my primary research interest is in using galaxy clusters as cosmological probes. My collaborators and I have shown that a combination of cluster weak lensing, cluster-galaxy cross-correlations, and galaxy auto-correlations can produce tight constraints on cosmological parameters (particularly the amplitude of matter fluctuations $\sigma_8$). We have also developed the capacity to very accurately emulate the signal of these observables and compute their observable covariances with the aim of applying these methods to data.

I am also interested in halo and galaxy assembly bias. I have worked on researching the origin of halo assembly bias, and found that a variety of halo properties are tightly correlated with proximity to a massive neighbour halo. This ‘‘neighbour bias’’ accounts for the nearly all of the halo assembly bias signal in many cases. I am also currently working on constraining the level of galaxy assembly bias in SDSS using novel combinations of galaxy observables and the ELUCID constrained simulation.

### Interests

• Large Scale Structure
• Halo and Galaxy Assembly Bias
• Modified Gravity

### Education

• B.S. in Physics, 2015

Lehigh University

• B.S. in Mathematics, 2015

Lehigh University

# Publications

### Cosmology with galaxy-galaxy lensing on non-perturbative scales: emulation method and application to BOSS LOWZ

We describe our non-linear emulation (I.e. interpolation) framework that combines the halo occupation distribution (HOD) galaxy bias …

### Cosmology with stacked cluster weak lensing and cluster-galaxy cross-correlations

Cluster weak lensing is a sensitive probe of cosmology, particularly the amplitude of matter clustering $\sigma_8$ and matter density …

### Covariance matrices for galaxy cluster weak lensing: from virial regime to uncorrelated large-scale structure

Next-generation optical imaging surveys will revolutionize the observations of weak gravitational lensing by galaxy clusters and …

### Emulating galaxy clustering and galaxy-galaxy lensing into the deeply non-linear regime: methodology, information, and forecasts

The combination of galaxy-galaxy lensing (GGL) with galaxy clustering is one of the most promising routes to determining the amplitude …

### Spatial clustering of dark matter haloes: secondary bias, neighbour bias, and the influence of massive neighbours on halo properties

We explore the phenomenon commonly known as halo assembly bias, whereby dark matter haloes of the same mass are found to be more or …