31 citations · 177 across the 22 of their papers we have counts for
23 papers
FLARE MCMC: Fidelity-based Layer-Adaptive REcursive proposals for MCMC
Harini Venkatesan, Christian Shelton, Ming-Feng Ho +2
Markov chain Monte Carlo (MCMC) requires only the ability to evaluate the likelihood, making it a common technique for inference in complex models. However, it can have a slow mixi…
DESI DR2 Results IV: Alcock-Paczyński Measurements from the Lyman Alpha Forest and Cosmological Constraints
DESI Collaboration, A. G. Adame, J. Aguilar +152
We present Alcock-Paczyński (AP) measurements from the full shape of Lyman- (Ly) forest correlation functions measured from the second data release (DR2) of the Dark Energy S…
Small-scale Lyman alpha forest cosmology with PRIYA: Constraints from XQ100 and KODIAQ-SQUAD one-dimensional flux power spectra
Ming-Feng Ho, Mahdi Qezlou, Simeon Bird +4
We present a new cosmological analysis of the small-scale Lyman alpha forest 1D flux power spectrum (P1D) using high-resolution quasar spectra from XQ100 and KODIAQ-SQUAD, interpre…
Design and optimization of neural networks for multifidelity cosmological emulation
Yanhui Yang, Simeon Bird, Ming-Feng Ho +1
Accurate and efficient simulation-based emulators are essential for interpreting cosmological survey data down to nonlinear scales. Multifidelity emulation techniques reduce simula…
Ten-dimensional neural network emulator for the nonlinear matter power spectrum
Yanhui Yang, Simeon Bird, Ming-Feng Ho +1
We present GokuNEmu, a ten-dimensional neural network emulator for the nonlinear matter power spectrum, designed to support next-generation cosmological analyses. Built on the Goku…
Hints of an Anomalous Lens Population towards the Galactic Bulge
Scott E. Perkins, Peter McGill, William A. Dawson +4
The dark and dynamic parts of the Galaxy, including the bulk shape and movement of the Galactic Bulge and characteristics of dark compact object populations, such as a hypothetical…
Ten-parameter simulation suite for cosmological emulation beyond CDM
Yanhui Yang, Simeon Bird, Ming-Feng Ho
We present Goku, a suite of cosmological -body simulations, and the corresponding 10-dimensional emulator, GokuEmu, for the nonlinear matter power spectrum. The simulations span…
On Finding Black Holes in Photometric Microlensing Surveys
Zofia Kaczmarek, Peter McGill, Scott E. Perkins +5
There are expected to be millions of isolated black holes in the Galaxy resulting from the death of massive stars. Measuring the abundance and properties of this remnant population…
Investigating the mixing between two black hole populations in LIGO-Virgo-KAGRA GWTC-3
Ming-Feng Ho, Scott Ellis Perkins, Simeon Bird +4
We introduce a population model to analyze the mixing between hypothesised power-law and Gaussian bump black hole populations in the latest gravitational wave cat…
Astrometric Microlensing by Primordial Black Holes with The Roman Space Telescope
James Fardeen, Peter McGill, Scott E. Perkins +5
Primordial Black Holes (PBHs) could explain some fraction of dark matter and shed light on many areas of early-universe physics. Despite over half a century of research interest, a…
Disentangling the Black Hole Mass Spectrum with Photometric Microlensing Surveys
Scott Ellis Perkins, Peter McGill, William Dawson +8
From the formation mechanisms of stars and compact objects to nuclear physics, modern astronomy frequently leverages surveys to understand populations of objects to answer fundamen…
Forecast Cosmological Constraints with the 1D Wavelet Scattering Transform and the Lyman- forest
Hurum Maksora Tohfa, Simeon Bird, Ming-Feng Ho +2
We make forecasts for the constraining power of the 1D Wavelet Scattering Transform (WST) when used with a Lyman- forest cosmology survey. Using mock simulations and a Fisher ma…
Cosmological Constraints from the eBOSS Lyman- Forest using the PRIYA Simulations
M. A. Fernandez, Simeon Bird, Ming-Feng Ho
We present new cosmological parameter constraints from the eBOSS Lyman- forest survey. We use a new theoretical model and likelihood based on the PRIYA simulation suite. PRIYA i…
PRIYA: A New Suite of Lyman-alpha Forest Simulations for Cosmology
Simeon Bird, Martin Fernandez, Ming-Feng Ho +6
We present the PRIYA suite of cosmological simulations, based on the code and hydrodynamic model of the ASTRID simulation, and designed for cosmological analyses of the Lyman- f…
MF-Box: Multi-fidelity and multi-scale emulation for the matter power spectrum
Ming-Feng Ho, Simeon Bird, Martin A. Fernandez +1
We introduce MF-Box, an extended version of MFEmulator, designed as a fast surrogate for power spectra, trained using N-body simulation suites from various box sizes and particle l…
Machine Learning Uncovers the Universe's Hidden Gems: A Comprehensive Catalogue of CIV Absorption Lines in SDSS DR12
Reza Monadi, Ming-Feng Ho, Kathy L. Cooksey +1
We assemble the largest CIV absorption line catalogue to date, leveraging machine learning, specifically Gaussian processes, to remove the need for visual inspection for detecting…
A Multi-Fidelity Emulator for the Lyman- Forest Flux Power Spectrum
M. A. Fernandez, Ming-Feng Ho, Simeon Bird
In this work we extend our recently developed multi-fidelity emulation technique to the simulated Lyman- forest flux power spectrum. Multi-fidelity emulation allows interpolatio…
Multi-Fidelity Emulation for the Matter Power Spectrum using Gaussian Processes
Ming-Feng Ho, Simeon Bird, Christian R. Shelton
We present methods for emulating the matter power spectrum by combining information from cosmological -body simulations at different resolutions. An emulator allows estimation o…
Damped Lyman-alpha Absorbers from Sloan Digital Sky Survey DR16Q with Gaussian processes
Ming-Feng Ho, Simeon Bird, Roman Garnett
We present a new catalogue of Damped Lyman- absorbers from SDSS DR16Q, as well as new estimates of their statistical properties. Our estimates are computed with the Gaussian pro…
Automated Measurement of Quasar Redshift with a Gaussian Process
Leah Fauber, Ming-Feng Ho, Simeon Bird +3
We develop an automated technique to measure quasar redshifts in the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey (SDSS). Our technique is an exte…
Detecting Multiple DLAs per Spectrum in SDSS DR12 with Gaussian Processes
Ming-Feng Ho, Simeon Bird, Roman Garnett
We present a revised version of our automated technique using Gaussian processes (GPs) to detect Damped Lyman- absorbers (DLAs) along quasar (QSO) sightlines. The main improveme…
Large-scale acoustic peak shift in the Planck CMB data
Ming-Feng Ho, Lung-Yih Chiang
Cosmic microwave background (CMB) temperature anisotropies encode the history of the universe, which manifest itself in the angular power spectrum. We test the angular power spectr…
AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array
Kai-Yang Lin, Hiroaki Nishioka, Fu-Cheng Wang +35
The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is a co-planar interferometer array operating at a wavelength of 3mm to measure the Sunyaev-Zeldovich effect (SZ…