Vera Gluscevic
A5041566825- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Neutrino Physics Research
- Relativity and Gravitational Theory
- Black Holes and Theoretical Physics
- Medical Education and Admissions
- Atomic and Subatomic Physics Research
- Space Science and Extraterrestrial Life
- History and Developments in Astronomy
- Photocathodes and Microchannel Plates
- Superconducting and THz Device Technology
- Particle Detector Development and Performance
- CCD and CMOS Imaging Sensors
- Millimeter-Wave Propagation and Modeling
University of Southern California
2019-2025
Southern California University for Professional Studies
2024-2025
California Institute of Technology
2009-2024
Princeton University
2019-2022
UCLA Health
2022
University of Florida
2018-2020
Institute for Advanced Study
2013-2019
University of Hawaii System
2018
Johns Hopkins University
2018
Albert Einstein College of Medicine
2014-2017
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations the early 2020s. We describe scientific goals of experiment, motivate design, and forecast its performance. SO will measure temperature polarization anisotropy six frequency bands: 27, 39, 93, 145, 225 280 GHz. initial configuration have three small-aperture 0.5-m telescopes (SATs) one large-aperture 6-m telescope (LAT), with total 60,000 cryogenic...
We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from Atacama Cosmology Telescope, using data taken 2013-2016 at 98 150 GHz. The cover more than 17,000 deg$^2$, deepest 600 deg$^2$ with noise levels below 10 $\mu$K-arcmin. use power spectrum derived almost 6,000 these to constrain cosmology. ACT enable a measurement angular scale features in both divergence-like anisotropy, tracing velocity density last-scattering. From one...
We present the science case, reference design, and project plan for Stage-4 ground-based cosmic microwave background experiment CMB-S4.
This book lays out the scientific goals to be addressed by next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned consist of dedicated telescopes at South Pole, high Chilean Atacama plateau and possibly a northern hemisphere site, all equipped with new superconducting cameras. CMB-S4 will dramatically advance cosmological studies crossing critical thresholds in search for B-mode polarization signature primordial gravitational waves, determination number...
We present the temperature and polarization angular power spectra of CMB measured by Atacama Cosmology Telescope (ACT) from 5400 deg$^2$ 2013-2016 survey, which covers $>$15000 at 98 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related this, show numerous checks for systematic error done before unblinding. Using likelihood cosmological constrain secondary sources anisotropy foreground emission, derive "CMB-only" spectrum that extends...
We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the fundamental properties dark matter (DM). This analysis fully incorporates inhomogeneities in spatial distribution and detectability MW satellites marginalizes over uncertainties mapping between DM halos, system, disruption subhalos by disk. Our results are consistent with cold, collisionless paradigm yield strongest cosmological constraints date on particle models warm, interacting, fuzzy matter. At 95%...
Abstract CMB-S4—the next-generation ground-based cosmic microwave background (CMB) experiment—is set to significantly advance the sensitivity of CMB measurements and enhance our understanding origin evolution universe. Among science cases pursued with CMB-S4, quest for detecting primordial gravitational waves is a central driver experimental design. This work details development forecasting framework that includes power-spectrum-based semianalytic projection tool, targeted explicitly toward...
We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed CMB measurements made by the Atacama Cosmology Telescope (ACT) 2017 to 2021. In combination with BAO (from SDSS and 6dF), we obtain amplitude of matter fluctuations $\sigma_8 = 0.819 \pm 0.015$ at 1.8% precision, $S_8\equiv\sigma_8({\Omega_{\rm m}}/0.3)^{0.5}=0.840\pm0.028$ Hubble constant $H_0= (68.3 1.1)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$ 1.6% precision. A joint...
The early dark energy (EDE) scenario aims to increase the value of Hubble constant (${H}_{0}$) inferred from cosmic microwave background (CMB) data over that found in standard cosmological model ($\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$), via introduction a new form density Universe. EDE component briefly accelerates expansion just prior recombination, which reduces physical size sound horizon imprinted CMB. Previous work has nonzero is not preferred by Planck CMB power spectrum alone,...
We present new measurements of cosmic microwave background (CMB) lensing over $9400$ sq. deg. the sky. These are derived from Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB dataset, which consists five seasons ACT temperature and polarization observations. determine amplitude power spectrum at $2.3\%$ precision ($43\sigma$ significance) using a novel pipeline that minimizes sensitivity to foregrounds noise properties. To ensure our results robust, we analyze an extensive set null...
We investigate the hypothesis that Coulomb-type interactions between dark matter (DM) and baryons explain anomalously low 21 cm brightness-temperature minimum at redshift $z\ensuremath{\sim}17$ was recently measured by EDGES experiment. In particular, we reassess validity of scenario where a small fraction total DM is millicharged, focusing on newly derived constraints from Planck 2015 cosmic microwave background (CMB) data. Crucially, CMB power spectrum sensitive to DM--baryon scattering if...
We present the first cosmological constraint on dark matter scattering with protons in early Universe for entire range of masses between 1 keV and TeV. This is derived from Planck measurements cosmic microwave background (CMB) temperature polarization anisotropy, CMB lensing anisotropy. It improves upon previous constraints by many orders magnitude, where limits are available, closes gap coverage low-mass candidates. focus two canonical interaction scenarios: spin-independent spin-dependent...
We perform an improved cosmic microwave background (CMB) analysis to search for dark matter--proton scattering with a momentum-transfer cross section of the form ${\ensuremath{\sigma}}_{0}{v}^{n}$ $n=\ensuremath{-}2$ and $n=\ensuremath{-}4$. In particular, we present new robust prescription incorporating relative bulk velocity between matter baryon fluids into standard linear Boltzmann calculation. Using iterative procedure, self-consistently include effects velocities in cosmology which...
Chiral gravity and cosmological birefringence both provide physical mechanisms to produce parity-violating $TB$ $EB$ correlations in the cosmic microwave background (CMB) temperature/polarization. Here, we study how well these two can be distinguished if nonzero $TB/EB$ are found. To do so, evaluate correlation matrix, including new $TB\mathrm{\text{\ensuremath{-}}}EB$ covariances. We find that effects of on CMB highly orthogonal, thus fairly case a high-signal-to-noise detection...
The Probe of Inflation and Cosmic Origins (PICO) is a proposed probe-scale space mission consisting an imaging polarimeter operating in frequency bands between 20 800 GHz. We describe the science achievable by PICO, which has sensitivity equivalent to more than 3300 Planck missions, technical implementation, schedule cost.
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert Chile that promises to provide breakthrough discoveries fundamental physics, cosmology, and astrophysics. Supported by Foundation, Heising-Simons with contributions from collaborating institutions, SO will see first light 2021 start five year survey 2022. has 287 collaborators 12 countries 53 including 85 students 90 postdocs. its currently funded form...
Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction individual components sky, rather than measurements at power spectrum level alone. To date, nearly all component separation CMB has been performed exclusively using satellite data. In this paper, we implement a method based on internal linear combination (ILC) approach which have designed to optimally account for anisotropic noise (in 2D Fourier domain) often found ground-based experiments....
While astrophysical and cosmological probes provide a remarkably precise consistent picture of the quantity general properties dark matter, its fundamental nature remains one most significant open questions in physics. Obtaining more comprehensive understanding matter within next decade will require overcoming number theoretical challenges: groundwork for these strides is being laid now, yet much to be done. Chief among upcoming challenges establishing foundation needed harness full...
We present a measurement of the cross-correlation between MagLim galaxies selected from Dark Energy Survey (DES) first three years observations (Y3) and cosmic microwave background (CMB) lensing Atacama Cosmology Telescope (ACT) Data Release 4 (DR4), reconstructed over $\sim 436$ sq.deg. sky. Our galaxy sample, which covers 4143$ sq.deg., is divided into six redshift bins spanning range $0.20<z<1.05$. adopt blinding procedure until passing all consistency systematics tests. After imposing...
We explore a self-interacting neutrino cosmology in which neutrinos experience delayed onset of free-streaming. use the effective field theory large-scale structure (LSS) to model matter distribution on mildly nonlinear scales within for first time. perform combined likelihood analysis BOSS full-shape galaxy clustering, weak lensing, and Lyman-$\ensuremath{\alpha}$ forest measurements, together with cosmic microwave background (CMB) data from Planck. find that full dataset strongly favors...
Abstract The abundance of faint dwarf galaxies is determined by the underlying population low-mass dark matter (DM) halos and efficiency galaxy formation in these systems. Here, we quantify potential DM constraints from future satellite surveys. We generate populations using a suite Milky Way (MW)–mass cosmological zoom-in simulations an empirical galaxy–halo connection model, assess sensitivity to signals when marginalizing over uncertainties. find that survey all satellites around one...
We obtain the first cosmological constraints on interactions between dark matter and protons within formalism of nonrelativistic effective field theory developed for direct detection. For each interaction operator in theory, parametrized by different powers relative velocity incoming particles, we use Planck 2015 cosmic microwave background (CMB) temperature, polarization, lensing anisotropy to set upper limits scattering cross section all masses above 15 keV. find that associated with a...
The search for weakly-interacting massive particle (WIMP) dark matter is multi-pronged. Ultimately, the WIMP-dark-matter picture will only be confirmed if different classes of experiments see consistent signals and infer same WIMP properties. In this work, we review ideas, methods, status direct-detection searches. We focus in particular on extracting physics (WIMP interactions phase-space distribution) from data early discovery days when multiple order dozens to hundreds events. To...