Ashley J. Ross
A5058815173- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Astronomical Observations and Instrumentation
- Scientific Research and Discoveries
- Remote Sensing in Agriculture
- Black Holes and Theoretical Physics
- Gaussian Processes and Bayesian Inference
- Impact of Light on Environment and Health
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Solar and Space Plasma Dynamics
- Plant Water Relations and Carbon Dynamics
- Spectroscopy and Laser Applications
- Calibration and Measurement Techniques
State Library of Ohio
2024-2025
The Ohio State University at Lima
2023-2025
California Consortium of Addiction Programs and Professionals
2015-2025
The Ohio State University
2015-2024
University of Oxford
2019-2023
Campbell Collaboration
2021
Ohio University
2020
University of Portsmouth
2010-2018
Laboratoire AstroParticule et Cosmologie
2016
Institut d'Astrophysique de Paris
2016
We present cosmological results from the final galaxy clustering data set of Baryon Oscillation Spectroscopic Survey, part Sloan Digital Sky Survey III. Our combined sample comprises 1.2 million massive galaxies over an effective area 9329 deg^2 and volume 18.7 Gpc^3, divided into three partially overlapping redshift slices centred at redshifts 0.38, 0.51, 0.61. measure angular diameter distance DM Hubble parameter H baryon acoustic oscillation (BAO) method after applying reconstruction to...
We present a one per cent measurement of the cosmic distance scale from detections baryon acoustic oscillations (BAO) in clustering galaxies Baryon Oscillation Spectroscopic Survey, which is part Sloan Digital Sky Survey III. Our results come Data Release 11 (DR11) sample, containing nearly million and covering approximately 8500 square degrees redshift range 0.2 < |$z$| 0.7. also compare these with those publicly released DR9 DR10 samples. Assuming concordance Λ cold dark matter (ΛCDM)...
We create a sample of spectroscopically identified galaxies with $z < 0.2$ from the Sloan Digital Sky Survey (SDSS) Data Release 7, covering 6813 deg$^2$. Galaxies are chosen to highest mass haloes, an effective bias 1.5, allowing us construct 1000 mock galaxy catalogs (described in Paper II), which we use estimate statistical errors and test our methods. gravitational potential "reconstruct" linear density fluctuations, enhancing Baryon Acoustic Oscillation (BAO) signal measured correlation...
We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$\alpha$ forests completed Sloan Digital Sky Survey (SDSS) lineage experiments in large-scale structure. These experiments, composed data SDSS, SDSS-II, BOSS, eBOSS, offer independent baryon acoustic oscillation (BAO) angular-diameter distances Hubble relative to sound horizon, $r_d$, eight different samples six growth rate parameter, $f\sigma_8$, redshift-space distortions (RSD)....
We present measurements of galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part Sloan Digital Sky III (SDSS-III). These use Data Release 9 (DR9) CMASS sample, contains 264 283 massive galaxies covering 3275 square degrees with an effective redshift z = 0.57 and range 0.43 < 0.7. Assuming a concordance ΛCDM cosmological model, this sample covers volume 2.2 Gpc3, represents largest Universe ever surveyed at density, . measure angle-averaged correlation...
We derive constraints on cosmological parameters and tests of dark energy models from the combination baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) Type Ia supernova (SN) data. take advantage high-precision BAO galaxy clustering Ly-alpha forest (LyaF) in BOSS survey SDSS-III. data alone yield a high confidence detection energy, CMB angular scale they further imply nearly flat universe. Combining SN into an "inverse distance ladder" yields 1.7%...
The Baryon Oscillation Spectroscopic Survey (BOSS), part of the Sloan Digital Sky (SDSS) III project, has provided largest survey galaxy redshifts available to date, in terms both number measured by a single survey, and effective cosmological volume covered. Key analysing clustering these data provide measurements is understanding detailed properties this sample. Potential issues include variations target catalogue caused changes either targeting algorithm or used, pattern spectroscopic...
We analyze the anisotropic clustering of massive galaxies from Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic (BOSS) Data Release 9 (DR9) sample, which consists 264,283 in redshift range 0.43 < z 0.7 spanning 3,275 square degrees. Both peculiar velocities and errors assumed redshift-distance relation ("Alcock-Paczynski effect") generate correlations between amplitude orientation with respect to line-of-sight. Together sharp baryon acoustic oscillation (BAO) standard ruler, our...
We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using clustering quasars. consider a sample 147 000 quasars from extended Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z 2.2 and measure their spherically averaged both configuration Fourier space. Our observational data set 1400 simulated realizations allow us to detect preference for BAO that is greater than 2.8σ. determine distance = 1.52 3.8 per cent...
We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of extended Baryon Oscillation Spectroscopic (eBOSS). This comprises largest selection spectroscopically confirmed quasars to date. The full includes two sub-catalogs: a "superset" all SDSS-IV/eBOSS objects targeted as containing 1,440,615 observations and quasar-only 750,414 quasars, including 225,082 new appearing in an SDSS data release for first time, well known SDSS-I/II/III. automated...
We investigate the anisotropic clustering of Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) sample, which consists $1\,198\,006$ galaxies in redshift range $0.2 < z 0.75$ and a sky coverage $10\,252\,$deg$^2$. analyse this dataset Fourier space, using power spectrum multipoles to measure Redshift-Space Distortions (RSD) simultaneously with Alcock-Paczynski (AP) effect Acoustic (BAO) scale. include monopole, quadrupole hexadecapole our analysis compare measurements...
We analyse the anisotropic clustering of Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 (DR11) sample, which consists $690\,827$ galaxies in redshift range $0.43 < z 0.7$ and has a sky coverage $8\,498\,\text{deg}^2$. perform our analysis Fourier space using power spectrum estimator suggested by Yamamoto et al. (2006). measure multipole spectra self-consistent manner for first time sense that we provide proper way to treat survey window function integral constraint,...
We present a fast method of producing mock galaxy catalogues that can be used to compute covariance matrices large-scale clustering measurements and test the methods analysis. Our populates 2nd-order Lagrangian Perturbation Theory (2LPT) matter field, where we calibrate masses dark halos by detailed comparisons with N-body simulations. demonstrate is recovered at ~10 per cent accuracy. populate galaxies using Halo Occupation Distribution (HOD) prescription, which has been calibrated...
This work, together with its companion paper, Secco and Samuroff et al. (2021), presents the Dark Energy Survey Year 3 cosmic shear measurements cosmological constraints based on an analysis of over 100 million source galaxies. With data spanning 4143 deg$^2$ sky, divided into four redshift bins, we produce highest significance measurement to date, a signal-to-noise 40. We conduct blind in context $\Lambda$CDM model find 3% constraint clustering amplitude, $S_8\equiv \sigma_8 (\Omega_{\rm...
We reproduce the galaxy clustering catalogue from SDSS-III Baryon Oscillation Spectroscopic Survey Final Data Release (BOSS DR11&DR12) with high fidelity on all relevant scales in order to allow a robust analysis of baryon acoustic oscillations and redshift space distortions. have generated (6,000) 12,288 MultiDark PATCHY BOSS (DR11) DR12 light-cones corresponding an effective volume $\sim192,000\,[h^{-1}\,{\rm Gpc}]^3$ (the largest ever simulated volume), including cosmic evolution range...
We use the observed anisotropic clustering of galaxies in Baryon Oscillation Spectroscopic Survey Data Release 11 CMASS sample to measure linear growth rate structure, Hubble expansion and comoving distance scale. Our covers 8498 deg2 encloses an effective volume 6 Gpc3 at redshift |$\bar{z} = 0.57$|. find fσ8 0.441 ± 0.044, H 93.1 3.0 km s−1 Mpc−1 DA 1380 23 Mpc when fitting simultaneously. When we fix background one predicted by spatially flat Λ cold dark matter (ΛCDM) model agreement...
This work and its companion paper, Amon et al. (2021), present cosmic shear measurements cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain lensing amplitude parameter $S_8\equiv\sigma_8\sqrt{\Omega_\textrm{m}/0.3}$ at 3% level $\Lambda$CDM: $S_8=0.759^{+0.025}_{-0.023}$ (68% CL). Our constraint is 2% when using angular scale cuts that are optimized for $\Lambda$CDM analysis: $S_8=0.772^{+0.018}_{-0.017}$ With alone, we...
ABSTRACT We measure the anisotropic clustering of quasar sample from Data Release 16 (DR16) Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic (eBOSS). A 343 708 spectroscopically confirmed quasars between redshift 0.8 &lt; z 2.2 are used as tracers underlying dark matter field. In comparison with DR14 sample, final doubles number objects well survey area. this paper, we present analysis in configuration space by measuring two-point correlation function and decomposing...
We present the cosmological analysis of configuration-space anisotropic clustering in completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic (eBOSS) DR16 galaxy sample. This sample consists luminous red galaxies (LRGs) spanning redshift range $0.6 < z 1$, at an effective $z_{\rm eff}=0.698$. It combines 174 816 eBOSS LRGs and 202 642 BOSS CMASS galaxies. extract model baryon acoustic oscillations (BAO) redshift-space distortions (RSD) features from...
We analyse the density field of galaxies observed by Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic (BOSS) included in SDSS Data Release Nine (DR9). DR9 includes spectroscopic redshifts for over 400 000 spread a footprint 3275 deg2. identify, characterize and mitigate impact sources systematic uncertainty on large-scale clustering measurements, both angular moments redshift-space correlation function, ξℓ(s), spherically averaged power spectrum, P(k), order to ensure...
We combine Dark Energy Survey Year 1 clustering and weak lensing data with Baryon Acoustic Oscillations (BAO) Big Bang Nucleosynthesis (BBN) experiments to constrain the Hubble constant. Assuming a flat $\Lambda$CDM model minimal neutrino mass ($\sum m_\nu = 0.06$ eV) we find $H_0=67.2^{+1.2}_{-1.0}$ km/s/Mpc (68% CL). This result is completely independent of constant measurements based on distance ladder, Cosmic Microwave Background (CMB) anisotropies (both temperature polarization), strong...
We present baryon acoustic oscillation (BAO) scale measurements determined from the clustering of 1.2 million massive galaxies with redshifts 0.2 < z 0.75 distributed over 9300 deg2, as quantified by their redshift–space correlation function. In order to facilitate these measurements, we define, describe, and motivate selection function for in final data release (DR12) SDSS III Baryon Oscillation Spectroscopic Survey (BOSS). This includes observational footprint, masks image quality Galactic...
We analyse the clustering of Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Data Release 16 luminous red galaxy sample (DR16 eBOSS LRG) in combination with high redshift tail III 12 (DR12 BOSS CMASS). measure space distortions (RSD) and also extract longitudinal transverse baryonic acoustic oscillation (BAO) scale from anisotropic power spectrum signal inferred 377,458 galaxies between redshifts 0.6 1.0, effective $z_{\rm eff}=0.698$ comoving volume $2.72\,{\rm...
We measure Redshift-Space Distortions (RSD) in the two-point correlation function of a sample $63,163$ spectroscopically identified galaxies with $z < 0.2$, an epoch where there are currently only limited measurements, from Sloan Digital Sky Survey (SDSS) Data Release 7 Main Galaxy Sample. Our sample, which we denote MGS, covers 6,813 deg$^2$ effective redshift $z_{eff}=0.15$ and is described our companion paper (Paper I), concentrates on BAO measurements. In order to validate fitting...