3 citations · 3 across the 6 of their papers we have counts for
7 papers
PSFSim: PhySics First Simulations for the Point Spread Function of the Roman Space Telescope
Nihar Dalal, Chris Hirata, Charuhas Shiveshwarkar +6
We present a new tool for generating simulated point spread functions (PSFs) in the Wide Field Instrument (WFI) of the Nancy Grace Roman Space Telescope. The simulation tool is phy…
Modeling the impact of filter-substrate refraction in the Roman point spread function
Federico Berlfein, Rachel Mandelbaum, Tianqing Zhang +4
For broadband imaging surveys, filter-substrate refraction causes light at different wavelengths to follow slightly different paths through the filter substrate before reaching the…
The kSZ optical depth degeneracy and future constraints on local primordial non-Gaussianity
Avery J. Tishue, Charuhas Shiveshwarkar, Gilbert Holder
Recent reconstructions of the large-scale cosmological velocity field with kinetic Sunyaev Zeldovich (kSZ) tomography have returned an amplitude that is low with respect to the hal…
Where does non-Universality in Assembly Bias come from?
Charuhas Shiveshwarkar, Marilena Loverde, Christopher M. Hirata +1
Constraints on local primordial non-Gaussianity (LPnG) obtained from galaxy power spectra are limited by the perfect degeneracy between the LPnG parameter and the bias…
Constraining general multi-field inflation using the SPHEREx all-sky survey
Charuhas Shiveshwarkar, Thejs Brinckmann, Marilena Loverde
We investigate how well the SPHEREx all-sky survey can constrain local primordial non-Gaussianity beyond the parameter using galaxy power spectra. We forecast joint…
Post-inflationary Contamination of Local Primordial Non-Gaussianity in Galaxy Power Spectra
Charuhas Shiveshwarkar, Thejs Brinckmann, Marilena Loverde +1
The scale-dependent bias of galaxy density contrasts is an important signal to be extracted in constraining local primordial non-Gaussianity () from obse…
Scale-dependent halo bias and the squeezed limit bispectrum in the presence of radiation
Charuhas Shiveshwarkar, Drew Jamieson, Marilena Loverde
We investigate the gravitational effect of large-scale radiation perturbations on small-scale structure formation. In addition to making the growth of matter perturbations scale de…