Patricia Larsen
A5003232925- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Spatial and Panel Data Analysis
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Computer Graphics and Visualization Techniques
- Big Data Technologies and Applications
- Gaussian Processes and Bayesian Inference
- Streptococcal Infections and Treatments
- Occupational Therapy Practice and Research
- Data Mining Algorithms and Applications
- Superconducting and THz Device Technology
- Sports injuries and prevention
- Sports Performance and Training
- Library Science and Information Literacy
- Digital and Traditional Archives Management
- Solar and Space Plasma Dynamics
- Pulsars and Gravitational Waves Research
- Parallel Computing and Optimization Techniques
Argonne National Laboratory
2019-2024
Bispebjerg Hospital
2020
University of Copenhagen
2020
University of Cambridge
2014-2016
University of Auckland
2013-2014
Northwestern Memorial Hospital
1985
Northwestern University
1985
Royal North Shore Hospital
1982
Impolite planet ignores host's partner Many known exoplanets (planets outside our own solar system) are hosted by binary systems that contain two stars. These planets normally circle around both of their Using microlensing data taken with a worldwide network telescopes, Gould et al. found twice the mass Earth circles just one pair The same approach has potential to uncover other similar star and help illuminate some mysteries formation. Science , this issue p. 46
Abstract This paper introduces cosmoDC2, a large synthetic galaxy catalog designed to support precision dark energy science with the Large Synoptic Survey Telescope (LSST). CosmoDC2 is starting point for second data challenge (DC2) carried out by LSST Dark Energy Science Collaboration (LSST DESC). The based on trillion-particle, (4.225 Gpc) 3 box cosmological N -body simulation, Outer Rim run. It covers 440 deg 2 of sky area redshift z = and matches expected number densities from...
We perform a joint analysis of intrinsic alignments and cosmology using tomographic weak lensing, galaxy clustering galaxy-galaxy lensing measurements from Year 1 (Y1) the Dark Energy Survey. define early- late-type subsamples, which are found to pass series systematics tests, including for spurious photometric redshift error point spread function correlations. analyse these split data alongside fiducial mixed Y1 sample range alignment models. In Nonlinear Alignment Model (NLA) analysis,...
Abstract We describe the simulated sky survey underlying second data challenge (DC2) carried out in preparation for analysis of Vera C. Rubin Observatory Legacy Survey Space and Time (LSST) by LSST Dark Energy Science Collaboration (LSST DESC). Significant connections across multiple science domains will be a hallmark LSST; DC2 program represents unique modeling effort that stresses this interconnectivity way has not been attempted before. This encompasses full end-to-end approach: starting...
Delensing is an increasingly important technique to reverse the gravitational lensing of cosmic microwave background (CMB) and thus reveal primordial signals may obscure. We present a first demonstration delensing on Planck temperature maps using infrared (CIB). Reversing deflections in CMB linear combination 545 857GHz as tracer, we find that effects power spectrum are reduced manner consistent with theoretical expectations. In particular, characteristic sharpening acoustic peaks resulting...
We measure the cross-correlation between weak lensing of galaxy images and cosmic microwave background (CMB). The effects gravitational on different sources will be correlated if is caused by same mass fluctuations. use shape measurements from 139 deg$^{2}$ Dark Energy Survey (DES) Science Verification data overlapping CMB South Pole Telescope (SPT) Planck. DES source galaxies have a median redshift $z_{\rm med} {\sim} 0.7$, while kernel broad peaks at $z{\sim}2$. resulting maximally...
We present the analysis of gravitational microlensing event OGLE-2013-BLG-0102. The light curve is characterized by a strong short-term anomaly superposed on smoothly varying lensing with moderate magnification $A_{\rm max}\sim 1.5$. It found that was produced binary lens mass ratio between components $q = 0.13$ and caused passage source trajectory over caustic located away from barycenter binary. From effects due to finite size parallactic motion Earth, physical parameters system are...
Heavy controlled loads of tendon with prolonged time under tension remain the treatment choice in tendinopathy rehabilitation. The use low-load resistance exercise (LL, 20%-40% 1-RM) combination blood flow restriction (BFR) has been advocated as a clinically important rehabilitation tool for persons not tolerating high muscle-tendon loads. Similar or improved clinical outcomes have reported after LL-BFR compared to conventional following various types knee injury, and also load-matched,...
A measurement by microlensing of the planetary mass function planets with masses ranging from 5M_E to 10M_J and orbital radii 0.5 10 AU was reported recently. strategy for extending range down (1-3)M_E is proposed here. This entails monitoring peaks a few tens events moderately high magnifications 1-2m class telescopes. Planets Earth are found produce deviations ~ 5% light curves durations (0.7-3)hr in magnification 100 if projected separation planet lies annular region (0.85-1.2)r_E....
Correlations of galaxy ellipticities with large-scale structure, due to galactic tidal interactions, provide a potentially significant contaminant measurements cosmic shear. However, these intrinsic alignments are still poorly understood for galaxies at the redshifts typically used in shear analyses. For spiral galaxies, it is thought that torquing determining resulting zero correlation between ellipticity and gravitational potential linear theory. Here, we calculate leading-order correction...
We describe the first major public data release from cosmological simulations carried out with Argonne's HACC code. This initial covers a range of datasets large gravity-only simulations. The products include halo information for multiple redshifts, down-sampled particles, and lightcone outputs. provide two very LCDM as well beyond-LCDM spanning eleven w0-wa cosmologies. Our platform uses Petrel, research service, located at Argonne Leadership Computing Facility. Petrel offers fast transfer...
We introduce picasso , a model designed to predict thermodynamic properties of the intracluster medium based on halos in gravity-only simulations. The predictions result from combination an analytical gas model, mapping gravitational potential, and machine learning parameters for individual their scalar properties, such as mass concentration. Once trained, can be applied make arbitrary potential distributions, allowing its use with flexible inputs N−body particle distributions or radial...
The Last Journey is a large-volume, gravity-only, cosmological N-body simulation evolving more than 1.24 trillion particles in periodic box with side-length of 5.025Gpc. It was implemented using the HACC and analysis framework on BG/Q system, Mira. parameters are chosen to be consistent results from Planck satellite. A range tools have been run situ enable diverse set science projects, at same time, keep resulting data amount manageable. Analysis outputs generated starting redshift z~10...
Large simulation efforts are required to provide synthetic galaxy catalogs for ongoing and upcoming cosmology surveys. These extragalactic being used many diverse purposes covering a wide range of scientific topics. In order be useful, they must offer realistically complex information about the galaxies contain. Hence, it is critical implement rigorous validation procedure that ensures simulated properties faithfully capture observations delivers an assessment level realism attained by...
We report the discovery of MOA-2013-BLG-220Lb, which has a super-Jupiter mass ratio $q=3.01\pm 0.02\times 10^{-3}$ relative to its host. The proper motion, $\mu=12.5\pm 1\, {\rm mas}\,{\rm yr}^{-1}$, is one highest for microlensing planets yet discovered, implying that it will be possible separately resolve host within $\sim 7$ years. Two separate lines evidence imply planet and are in Galactic disk. could have been detected characterized purely with follow-up data, important implications...
A challenging requirement posed by next-generation observations is a firm theoretical grasp of the impact baryons on structure formation. Cosmological hydrodynamic simulations modeling gas physics are vital in this regard. high degree flexibility exists space making it important to explore range methods order gauge accuracy simulation predictions. We present results from first cosmological using Conservative Reproducing Kernel Smoothed Particle Hydrodynamics (CRK-SPH). employ two...
Abstract In this paper we introduce the Farpoint simulation, latest member of Hardware/Hybrid Accelerated Cosmology Code (HACC) gravity-only simulation family. The domain covers a volume (1000 h −1 Mpc) 3 and evolves close to two trillion particles, corresponding mass resolution m p ∼ 4.6 × 10 7 M ⊙ . These specifications enable comprehensive investigations galaxy–halo connection, capturing halos down small masses. Further, large resolves scales typical modern surveys with good statistical...
ABSTRACT We examine the cosmological constraining power from two cross-correlation probes between galaxy and cosmic microwave background (CMB) surveys: of lens density with CMB lensing convergence 〈δgκCMB〉, source weak shear 〈γκCMB〉. These provide an independent cross-check other large-scale structure constraints are insensitive to galaxy-only or CMB-only systematic effects. In addition, when combined probes, cross-correlations can break degeneracies in nuisance parameters, improving both...
Abstract This paper introduces Subhalo Mass-loss Analysis using Core Catalogs (SMACC). SMACC adds a mass model to substructure merger trees based on halo “core tracking.” Our approach avoids the need for running expensive subhalo finding algorithms and instead uses mass-loss modeling assign masses cores. We present details of methodology demonstrate its excellent performance in describing evolution. Validation is carried out cosmological simulations at significantly different resolutions....
In preparation for cosmological analyses of the Vera C. Rubin Observatory Legacy Survey Space and Time (LSST), LSST Dark Energy Science Collaboration (LSST DESC) has created a 300 deg$^2$ simulated survey as part an effort called Data Challenge 2 (DC2). The DC2 sky survey, in six optical bands with observations following reference observing cadence, was processed Pipelines (19.0.0). this Note, we describe public data release resulting object catalogs coadded images five years along...
Synthetic datasets generated from large-volume gravity-only simulations are an important tool in the calibration of cosmological analyses. Their creation often requires accurate inference baryonic observables dark matter field. We explore effectiveness a baryon pasting algorithm providing precise estimations three-dimensional gas thermodynamic properties based on simulations. use Borg Cube, pair originating identical initial conditions, with one run evolved as simulation, and other...
Halo core tracking is a novel concept designed to efficiently follow halo substructure in large simulations. We have recently developed this gravity-only simulations investigate the galaxy-halo connection context of empirical and semi-analytic models. Here, we incorporate information from hydrodynamics simulations, with an emphasis on establishing between cores galaxies. compare across gravity-only, adiabatic hydrodynamics, subgrid same initial phases. demonstrate that are stable entities...
We introduce picasso, a model designed to predict thermodynamic properties of the intracluster medium based on halos in gravity-only simulations. The predictions result from combination an analytical gas model, mapping gravitational potential, and machine learning parameters for individual their scalar properties, such as mass concentration. Once trained, can be applied make arbitrary potential distributions, allowing its use with flexible inputs N-body particle distributions or radial...
We investigate the impact of spatial survey non-uniformity on galaxy redshift distributions for forthcoming data releases Rubin Observatory Legacy Survey Space and Time (LSST). Specifically, we construct a mock photometry dataset degraded by OpSim observing conditions, estimate photometric redshifts sample using template-fitting photo-$z$ estimator, BPZ, machine learning method, FlexZBoost. select Gold sample, defined as $i<25.3$ 10 year LSST data, with an adjusted magnitude cut each divide...