Emily Wisnioski
A5088790406- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Spectroscopy and Laser Applications
- Scientific Research and Discoveries
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Plant Water Relations and Carbon Dynamics
- Photocathodes and Microchannel Plates
- Planetary Science and Exploration
- Calibration and Measurement Techniques
- Advanced Measurement and Metrology Techniques
- Laser-Plasma Interactions and Diagnostics
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- CCD and CMOS Imaging Sensors
- Phase Equilibria and Thermodynamics
Australian National University
2018-2025
ARC Centre of Excellence for All-sky Astrophysics
2018-2025
ASTRO-3D
2018-2024
Australian Research Council
2020-2024
American Society for Radiation Oncology
2024
Max Planck Institute for Extraterrestrial Physics
2013-2020
Max Planck Society
2013-2018
Swinburne University of Technology
2009-2014
Astronomy and Space
2013
Australia Telescope National Facility
2013
We present measurements of the baryon acoustic peak at redshifts z = 0.44, 0.6 and 0.73 in galaxy correlation function final dataset WiggleZ Dark Energy Survey. combine our with lower-redshift from 6-degree Field Galaxy Survey Sloan Digital Sky Survey, producing a stacked survey which statistical significance detection is 4.9-sigma relative to zero-baryon model no peak. fit cosmological models this combined oscillation (BAO) comprising six distance-redshift data points, compare results...
We perform a joint determination of the distance-redshift relation and cosmic expansion rate at redshifts z = 0.44, 0.6 0.73 by combining measurements baryon acoustic peak Alcock-Paczynski distortion from galaxy clustering in WiggleZ Dark Energy Survey, using large ensemble mock catalogues to calculate covariance between measurements.We find that D A (z) (1205 ± 114, 1380 95, 1534 107) Mpc H(z) (82.6 7.8, 87.9 6.1, 97.3 7.0) km s -1 these three redshifts.Further our results with other...
We present the KMOS^3D survey, a new integral field survey of over 600 galaxies at 0.7<z<2.7 using KMOS Very Large Telescope (VLT). The utilizes synergies with multi-wavelength ground and space-based surveys to trace evolution spatially-resolved kinematics star formation from homogeneous sample 5 Gyrs cosmic history. Targets, drawn mass-selected parent 3D-HST cover formation-stellar mass ($M_*$) rest-frame $(U-V)-M_*$ planes uniformly. describe selection targets, observations, data...
The WiggleZ Dark Energy Survey is a survey of 240,000 emission line galaxies in the distant universe, measured with AAOmega spectrograph on 3.9-m Anglo-Australian Telescope (AAT). target are selected using ultraviolet photometry from GALEX satellite, flux limit NUV<22.8 mag. redshift range containing 90% 0.2<z<1.0. primary aim to precisely measure scale baryon acoustic oscillations (BAO) imprinted spatial distribution these at look-back times 4-8 Gyrs. Detailed forecasts indicate will BAO...
We present precise measurements of the growth rate cosmic structure for redshift range 0.1 < z 0.9, using redshift-space distortions in galaxy power spectrum WiggleZ Dark Energy Survey. Our results, which have a precision around 10 per cent four independent bins, are well fitted by flat Λ cold dark matter (ΛCDM) cosmological model with density parameter Ωm= 0.27. analysis hence indicates that this provides self-consistent description through large-scale perturbations and homogeneous...
We present significant improvements in cosmic distance measurements from the Wig-gleZ Dark Energy Survey, achieved by applying reconstruction of baryonic acoustic feature technique.We show using both data and simulations that technique can often be effective despite patchiness survey, edge effects shot-noise.We investigate three redshift bins range 0.2 < z 1, all find improvement after detection its usage as a standard ruler.We measure model independent measures D V r fid s /r 1716± 83 Mpc,...
This paper presents cosmological results from the final data release of WiggleZ Dark Energy Survey. We perform full analyses different models using power spectra measured at $z=0.22$, 0.41, 0.60, and 0.78, combined with other sets. The limiting factor in this analysis is theoretical modeling galaxy spectrum, including nonlinearities, bias, redshift-space distortions. In we assess several methods for testing them against Gigaparsec simulations (GiggleZ). fit a base set six parameters,...
In this paper we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M*/Msun) >= 10.9) z~1-3 star-forming galaxies (Forster Schreiber et al.), by increasing sample size a factor six (to 44 above log(M*/Msun) from combination SINS/zC-SINF, LUCI, GNIRS, and KMOS^3D spectroscopic surveys. We find fairly sharp onset incidence broad emission (FWHM Ha, [NII], [SII] lines ~ 450-5300 km/s), with large [NII]/Ha ratios, 10.9, about two thirds mass range exhibiting...
We present a census of ionized gas outflows in 599 normal galaxies at redshift 0.6<z<2.7, mostly based on integral field spectroscopy Ha, [NII], and [SII] line emission. The sample fairly homogeneously covers the main sequence star-forming with masses 9.0<log(M*/Msun)<11.7, probes into regimes quiescent starburst outliers. About 1/3 exhibits high-velocity component indicative outflows, roughly equally split winds driven by star formation (SF) active galactic nuclei (AGN). incidence SF-driven...
We measure the imprint of baryon acoustic oscillations (BAOs) in galaxy clustering pattern at highest redshift achieved to date, z= 0.6, using distribution N= 132 509 emission-line galaxies WiggleZ Dark Energy Survey. quantify BAOs three statistics: correlation function, power spectrum and band-filtered estimator introduced by Xu et al. The results are mutually consistent, corresponding a 4.0 per cent measurement cosmic distance–redshift relation 0.6 [in terms parameter 'A(z)' Eisenstein...
We have made the largest-volume measurement to date of transition large-scale homogeneity in distribution galaxies. use WiggleZ survey, a spectroscopic survey over 200,000 blue galaxies cosmic volume ~1 (Gpc/h)^3. A new method defining 'homogeneity scale' is presented, which more robust than methods previously used literature, and can be easily compared between different surveys. Due large depth (up z=1) we are able make first range epochs. The mean number N(<r) spheres comoving radius r...
Astronomical observations suggest that today's Universe is dominated by a dark energy of unknown physical origin. One the most notable results obtained from many models should cause expansion to accelerate: but rate as function time has proved very difficult measure directly. We present new determination cosmic history combining distant supernovae with geometrical analysis large-scale galaxy clustering within WiggleZ Dark Energy Survey, using Alcock–Paczynski test distortion standard...
Correlations between the intrinsic shapes of galaxy pairs, and galaxies large-scale density field, may be induced by tidal fields. These correlations, which have been detected at low redshifts (z<0.35) for bright red in Sloan Digital Sky Survey (SDSS), upper limits exist blue z~0.1, provide a window into formation evolution, are also an important contaminant current future weak lensing surveys. Measurements these alignments intermediate (z~0.6) that more relevant cosmic shear observations...
As part of the SINS/zC-SINF surveys high-z galaxy kinematics, we derive radial distributions Hα surface brightness, stellar mass density, and dynamical at ∼2 kpc resolution in 19 z ∼ 2 star-forming disks with deep SINFONI adaptive optics spectroscopy ESO Very Large Telescope. From these data infer distribution Toomre Q-parameter for main-sequence galaxies (SFGs), covering almost two decades (109.6–1011.5 M☉). In more than half our SFGs, cannot be fit by a centrally peaked distribution, such...
We present the $0.6
(abridged) DYNAMO is a multi-wavelength, spatially-resolved survey of local ($z \sim 0.1$) star-forming galaxies designed to study evolution through comparison with samples at z~2. Half the sample has integrated H-alpha luminosities >$10^{42}$ erg/s, typical lower limit for resolved spectroscopy The covers range in stellar mass ($10^9$-$10^{11}$ Msun) and star-formation rate (0.2-100 Msun/yr). In this first paper series, we present integral-field emission 67 galaxies. We infer gas fractions...
ABSTRACT We present measurements of the [N ii ]/H α ratio as a probe gas-phase oxygen abundance for sample 419 star-forming galaxies at z = 0.6–2.7 from KMOS 3D near-IR multi-integral field unit (IFU) survey. The mass–metallicity relation (MZR) is determined consistently with same selection, metallicity tracer, and methodology over wide redshift range probed by find good agreement long-slit surveys in literature, except low-mass slope <?CDATA $z\sim 2.3$?> , where this less biased than...
We report the detection of ubiquitous powerful nuclear outflows in massive (> 10^11 Msun) z~2 star-forming galaxies (SFGs), which are plausibly driven by an Active Galactic Nucleus (AGN). The sample consists eight most SFGs from our SINS/zC-SINF survey galaxy kinematics with imaging spectrometer SINFONI, six have sensitive high-resolution adaptive optics (AO) assisted observations. All objects disks hosting a significant stellar bulge. spectra their central regions exhibit broad component...
We present the correlations between stellar mass, star formation rate (SFR) and [NII]/Ha flux ratio as indicator of gas-phase metallicity for a sample 222 galaxies at 0.8 < z 2.6 log(M*/Msun)=9.0-11.5 from LUCI, SINS/zC-SINF KMOS3D surveys. This provides unique analysis mass-metallicity relation (MZR) over an extended redshift range using consistent data techniques strong-line indicator. find constant slope low-mass end can fully describe its evolution through characteristic turnover mass...
ABSTRACT We analyze the angular momenta of massive star-forming galaxies (SFGs) at peak cosmic star formation epoch ( z ∼ 0.8–2.6). Our sample ∼360 log( M * / ⊙ ) 9.3–11.8 SFGs is mainly based on KMOS 3D and SINS/zC-SINF surveys H α kinematics, collectively provides a representative subset population. The inferred halo scale momentum distribution broadly consistent with that theoretically predicted for their dark matter halos, in terms mean spin parameter <?CDATA $\langle \lambda \rangle $?>...
We investigate the stellar mass and baryonic Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z~2.3 z~0.9 as part KMOS^3D integral field spectroscopy survey. Our spatially resolved data allow reliable modelling individual galaxies, including effect pressure support on inferred gravitational potential. At fixed circular velocity, we find higher masses similar compared to z~0.9. Together with decreasing gas-to-stellar ratios redshift, this implies that...
Abstract We investigate the relationship between star formation activity and outflow properties on kiloparsec scales in a sample of 28 star-forming galaxies at z ∼ 2–2.6, using adaptive optics assisted integral field observations from SINFONI Very Large Telescope. The narrow broad components H α emission are used to simultaneously determine local rate surface density ( <?CDATA ${{\rm{\Sigma }}}_{\mathrm{SFR}}$?> ), velocity ${v}_{\mathrm{out}}$?> mass ${\dot{M}}_{\mathrm{out}}$?> ,...
Abstract We present 0.″2 resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations at 870 μ m in a stellar mass–selected sample of 85 massive ( <?CDATA ${M}_{\star }\gt {10}^{11}\,{M}_{\odot }$?> ) star-forming galaxies (SFGs) $z=1.9\mbox{--}2.6$?> the CANDELS/3D-Hubble Space Telescope fields UDS and GOODS-S. measure effective radius rest-frame far-infrared (FIR) emission for 62 SFGs. They are distributed over wide ranges FIR size from...
We report one of the most accurate measurements three-dimensional large-scale galaxy power spectrum achieved to date, using 56,159 redshifts bright emission-line galaxies at effective redshift z=0.6 from WiggleZ Dark Energy Survey Anglo-Australian Telescope. describe in detail how we construct survey selection function allowing for varying target completeness and completeness. measure total with an accuracy approximately 5% wavenumber bands dk=0.01 h/Mpc. A model including non-linear...