Latest Research
Cosmological constraints from density-split clustering in the BOSS CMASS galaxy sample
We present a clustering analysis of the BOSS DR12 CMASS galaxy sample, combining measurements of the galaxy two-point correlation function and density-split clustering down to a scale of $1\, h^{-1}{\rm Mpc}$.
Cosmology and Nongalactic Astrophysics
The Hyper Suprime-Cam extended Point Spread Functions and applications to measuring the intra-halo light
Our results show that not removing the PSF light can overestimate the IHL SB by $\sim$ 1. 7 mag arcsec$^{-2}$ and the $\mathrm{f_{IHL}}$ by $\sim$ 30%.
Astrophysics of Galaxies
Improvement of digest2 NEO Classification Code -- utilizing the Astrometry Data Exchange Standard
We describe enhancements to the digest2 software, a short-arc orbit classifier for heliocentric orbits.
Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics
Atmospheric loss in giant impacts depends on pre-impact surface conditions
Here we use a suite of 1D hydrodynamic simulations and impedance match calculations to quantify the effect that pre-impact surface conditions (such as atmospheric pressure and presence of an ocean) have on the efficiency of atmospheric and ocean loss from proto-planets during giant impacts.
Earth and Planetary Astrophysics Geophysics
SUNBIRD: A simulation-based model for full-shape density-split clustering
We present a simulation-based model that is able to capture the cosmological dependence of the full shape of the density-split clustering (DSC) statistics down to intra-halo scales.
Cosmology and Nongalactic Astrophysics
Statistical Bias in the Hubble Constant and Mass Power Law Slope for Mock Strong Lenses
Assuming a source at redshift 2. 0 and an EPL+XS lens at redshift 0. 3, we find that the bias can be reduced, but not eliminated, if we limit the sample to systems with annulus lengths $\Delta r_{1, 2} \gtrsim 0. 3$ arcsec.
Cosmology and Nongalactic Astrophysics
Optimal constraints on Primordial non-Gaussianity with the eBOSS DR16 quasars in Fourier space
If the quasars have a lower response to local PNG, our optimal constraint becomes $-23<f_{\rm NL}<21$ at $68\%$, with an improvement of $30\%$ over standard analyses.
Cosmology and Nongalactic Astrophysics
[CII] Spectral Mapping of the Galactic Wind and Starbursting Disk of M82 with SOFIA
We compare the [CII] line profiles to observations of CO and HI and find that likely the majority ($>55$%) of the [CII] emission in the outflow is associated with the neutral atomic medium.
Astrophysics of Galaxies
Non-ideal magnetohydrodynamics on a moving mesh II: Hall effect
The core of our algorithm is based on an estimation of the magnetic field gradients by a least-square reconstruction on the unstructured mesh, which we also used in the companion paper for Ohmic and ambipolar diffusion.
Instrumentation and Methods for Astrophysics
Sensitivity Analysis of Simulation-Based Inference for Galaxy Clustering
modichirag/contrastive_cosmology
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To guide our steps in this, we perform a sensitivity analysis of SBI for galaxy clustering on various components of the cosmological simulations: gravity model, halo-finder and the galaxy-halo distribution models (halo-occupation distribution, HOD).
Cosmology and Nongalactic Astrophysics
