A5071969760- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Spatial and Panel Data Analysis
- X-ray Spectroscopy and Fluorescence Analysis
- Seismic Waves and Analysis
- Organic Electronics and Photovoltaics
- Semiconductor Quantum Structures and Devices
- CCD and CMOS Imaging Sensors
- Astrophysical Phenomena and Observations
- Organic Light-Emitting Diodes Research
- Advanced Power Generation Technologies
- Seismic Imaging and Inversion Techniques
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- Astrophysics and Star Formation Studies
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Luminescence and Fluorescent Materials
- Coal and Coke Industries Research
University of California, Santa Cruz
2017-2024
Argonne National Laboratory
2024
Lafayette College
2016
Easton Hospital
2016
California Institute of Technology
2016
Abstract We present an analysis of the host-galaxy environment Swope Supernova Survey 2017a (SSS17a), discovery electromagnetic counterpart to a gravitational-wave source, GW170817. SSS17a occurred 1.9 kpc (in projection; 10.″2) from nucleus NGC 4993, S0 galaxy at distance 40 Mpc. Hubble Space Telescope ( HST ) pre-trigger image Magellan optical spectroscopy 4993 and location SSS17a, broadband UV-through-IR photometry 4993. The spectrum spectral-energy distribution indicate that has stellar...
We present a novel simulation-based cosmological analysis of galaxy-galaxy lensing and galaxy redshift-space clustering. Compared to methods based on perturbation theory, our approach allows us probe much wider range scales, $0.4 \, h^{-1} \mathrm{Mpc}$ $63 \mathrm{Mpc}$, including highly non-linear marginalises over astrophysical effects such as assembly bias. apply this framework data from the Baryon Oscillation Spectroscopic Survey LOWZ sample cross-correlated with state-of-the-art...
The recent completion of Advanced LIGO suggests that gravitational waves may soon be directly observed. Past searches for gravitational-wave transients have been impacted by transient noise artifacts, known as glitches, introduced into data due to instrumental and environmental effects. In this work, we explore how waveform complexity, instead signal-to-noise ratio, can used rank event candidates distinguish short duration astrophysical signals from glitches. We test framework using a new...
The splashback radius ($R_{\rm sp}$) of dark matter halos has recently been detected using weak gravitational lensing and cross-correlations with galaxies. However, different methods have used to measure $R_{\rm sp}$ assess the significance its detection. In this paper, we use simulations study precision accuracy which can detect 3D density, subhalo, profiles. We how well various tracers recover by comparing it value measured directly from particle dynamics. show that estimates density...
Using the weak gravitational lensing data from Hyper Suprime-Cam Subaru Strategic Program (HSC survey), we study potential of different stellar mass estimates in tracing halo mass. We consider galaxies with $\log {M_{\star}/M_{\odot}}>11.5$ at 0.2 < z 0.5 carefully measured light profiles and clusters redMaPPer CAMIRA richness-based algorithms. devise a method (the "TopN" test) to evaluate scatter mass-observable relation for tracers inter-compare proxies four number density bins using...
We perform a consistent comparison of the mass and profiles massive ($M_\star > 10^{11.4}M_{\odot}$) central galaxies at z~0.4 from deep Hyper Suprime-Cam (HSC) observations Illustris, TNG100, Ponos simulations. Weak lensing measurements HSC enable fixed halo provide constraints on strength impact feedback different scales. compare stellar function (SMF) Stellar-to-Halo Mass Relation (SHMR) various radii show that radius which is performed important. In general, Illustris TNG100 display...
ABSTRACT The joint analysis of different cosmological probes, such as galaxy clustering and weak lensing, can potentially yield invaluable insights into the nature primordial Universe, dark energy, matter. However, development high-fidelity theoretical models is a necessary stepping stone. Here, we present public high-resolution lensing maps on light-cone, generated using N-body simulation suite abacussummit, accompanying mock catalogues, tuned to Early Data Release small-scale measurements...
The joint analysis of different cosmological probes, such as galaxy clustering and weak lensing, can potentially yield invaluable insights into the nature primordial Universe, dark energy matter. However, development high-fidelity theoretical models that cover a wide range scales redshifts is necessary stepping-stone. Here, we present public high-resolution lensing maps on light cone, generated using $N$-body simulation suite AbacusSummit in Born approximation, accompanying mock catalogues,...
ABSTRACT Galaxy–galaxy lensing (GGL) and clustering measurements from the Dark Energy Spectroscopic Instrument Year 1 (DESI Y1) data set promise to yield unprecedented combined-probe tests of cosmology galaxy–halo connection. In such analyses, it is essential identify characterize all relevant statistical systematic errors. We forecast covariances DESI Y1 GGL + bias due redshift evolution in lens samples. Focusing on projected correlations, we compute a Gaussian analytical covariance, using...
ABSTRACT We propose that observations of supermassive galaxies contain cosmological statistical constraining power similar to conventional cluster cosmology, and we provide promising indications the associated systematic errors are comparably easier control. consider a fiducial spectroscopic stellar mass complete sample drawn from Dark Energy Spectroscopic Instrument (DESI) forecast how constraints on Ωm–σ8 this will compare with those number counts clusters based richness λ. At fixed...
ABSTRACT We present an investigation into a hitherto unexplored systematic that affects the accuracy of galaxy cluster mass estimates with weak gravitational lensing. Specifically, we study covariance between lensing signal, ΔΣ, and ‘true’ number count, Ngal, as measured within spherical volume is void projection effects. By quantifying impact this on calibration, work reveals significant source uncertainty. Using MDPL2 simulation galaxies traced by SAGE semi-analytic model, measure...
The Dark Energy Spectroscopic Instrument (DESI) survey will measure spectroscopic redshifts for millions of galaxies across roughly $14,000 \, \mathrm{deg}^2$ the sky. Cross-correlating targets in DESI with complementary imaging surveys allows us to and analyze shear distortions caused by gravitational lensing unprecedented detail. In this work, we a series mock catalogs ray-traced increasing sophistication estimate systematic effects on galaxy-galaxy estimators such as tangential...
Here we show evidence of the change in final composition ratio donor : acceptor blended films as a function crystallization.
Secondary halo properties beyond mass, such as the mass accretion rate (MAR), concentration, and half scale, are essential in understanding formation of large-scale structure dark matter halos. In this paper, we study impact secondary on galaxy-galaxy lensing observable, $\Delta\Sigma$. We build an emulator trained N-body simulations to model $\Delta\Sigma$ quantify different parameters profile. focus MAR show that a 3$\sigma$ detection variations at fixed could be achieved with Hyper...
Using the weak gravitational lensing data from Hyper Suprime-Cam Subaru Strategic Program (HSC survey), we study potential of different stellar mass estimates in tracing halo mass. We consider galaxies with $\log {M_{\star}/M_{\odot}}>11.5$ at 0.2 < z 0.5 carefully measured light profiles and clusters redMaPPer CAMIRA richness-based algorithms. devise a method (the "TopN" test) to evaluate scatter mass-observable relation for tracers inter-compare proxies four number density bins using...
We present a novel simulation-based cosmological analysis of galaxy-galaxy lensing and galaxy redshift-space clustering. Compared to methods based on perturbation theory, our approach allows us probe much wider range scales, $0.4 \, h^{-1} \mathrm{Mpc}$ $63 \mathrm{Mpc}$, including highly non-linear marginalises over astrophysical effects such as assembly bias. apply this framework data from the Baryon Oscillation Spectroscopic Survey LOWZ sample cross-correlated with state-of-the-art...
We propose that observations of super-massive galaxies contain cosmological constraining power similar to conventional cluster cosmology, and we provide promising indications the associated systematic errors are comparably easier control. consider a fiducial spectroscopic stellar mass complete sample drawn from Dark Energy Spectroscopic Survey (DESI) forecast how constraints on Omega_m-sigma_8 this will compare with those number counts clusters based richness. At fixed density, find massive...
ABSTRACT Combining different observational probes, such as galaxy clustering and weak lensing, is a promising technique for unveiling the physics of Universe with upcoming dark energy experiments. The redshift sample from Dark Energy Spectroscopic Instrument (DESI) will have significant overlap major ongoing imaging surveys specifically designed lensing measurements: Kilo-Degree Survey (KiDS), (DES), Hyper Suprime-Cam (HSC) survey. In this work, we analyse simulated catalogues to establish...
We report evidence of galaxy assembly bias - the correlation between properties and biased secondary halo at fixed mass (M$_H$) in stellar-to-halo relation (SHMR) for red central galaxies from Sloan Digital Sky Survey. In M$_H = 10^{11.5}-10^{13.5} h^{-1}$ M$_{\odot}$ range, stellar (M$_*$) is correlated with number density within $10 Mpc ($\delta_{10}$), a common proxy formation time. This signal also present when M$_H$, M$_*$, $\delta_{10}$ are substituted group luminosity, metrics...