A5055475826- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- CCD and CMOS Imaging Sensors
- Genomics and Phylogenetic Studies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Gene expression and cancer classification
- Vitamin D Research Studies
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Microbial Community Ecology and Physiology
- Gene Regulatory Network Analysis
- Rare-earth and actinide compounds
- Indigenous Studies and Ecology
- Diet and metabolism studies
- Solid-state spectroscopy and crystallography
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Analytical Chemistry and Chromatography
The University of Melbourne
2015-2025
Melbourne Genomics Health Alliance
2022
ARC Centre of Excellence for All-sky Astrophysics
2013-2018
The University of Sydney
2016
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012
CEA Paris-Saclay
2012
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2010-2011
Istituto Nazionale di Fisica Nucleare
2010-2011
Trieste Astronomical Observatory
2010-2011
National Institute for Astrophysics
2009
We investigate the relationship between stellar and gas specific angular momentum $j$, mass $M_{*}$ optical morphology for a sample of 488 galaxies extracted from SAMI Galaxy Survey. find that measured within one effective radius, monotonically increases with that, $M_{*}>$10$^{9.5}$ M$_{\odot}$, scatter in this relation strongly correlates (i.e., visual classification S\'ersic index). These findings confirm massive all types lie on plane relating mass, light distribution, suggest...
We present the ∼800 star formation rate maps for Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected dust attenuation via Balmer decrement, that are included in SAMI Public Data Release 1. mask out spaxels contaminated by non-stellar using [O iii]/H β, [N ii]/H α, [S and i]/H line ratios. Using these we examine global resolved star-forming main sequences of galaxies as a function morphology, environmental density, stellar mass....
We have entered a new era where integral-field spectroscopic surveys of galaxies are sufficiently large to adequately sample large-scale structure over cosmologically significant volume. This was the primary design goal SAMI Galaxy Survey. Here, in Data Release 3 (DR3), we release data for full 3068 unique observed. includes cluster 888 first time. For each galaxy, there two spectral cubes covering blue (370-570nm) and red (630-740nm) optical wavelength ranges at resolving power R=1808 4304...
We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral spectrograph (SAMI) Galaxy Survey to understand link between properties extraplanar gas and their host galaxies. The kinematics gas, including velocity asymmetries increased dispersion, are used differentiate hosting large-scale galactic winds from those dominated by extended diffuse ionized gas. find rather that spectrum gas-dominated wind...
We present the first major release of data from SAMI Galaxy Survey. This focuses on emission-line physics galaxies. Data Release One includes for 772 galaxies, about 20% full survey. Galaxies included have redshift range 0.004 < z 0.092, a large mass (7.6 log(Mstellar/M$_\odot$) 11.6), and star-formation rates 10^-4 to 10^1\ M$_\odot$/yr. For each galaxy, we include two spectral cubes set spatially resolved 2D maps: single- multi-component fits (with dust extinction corrections strong...
We investigate the properties of Damped Lyman-alpha systems (DLAs) using high-resolution and large box-size cosmological hydrodynamical simulations a LambdaCDM model. The numerical code used is modification GADGET-2 with self consistent implementation metal enrichment mechanism (Tornatore et al. 2007). explore convergence some relevant physical quantities we vary parameters describing galactic winds; initial stellar mass function; linear dark matter power spectrum pattern IGM (Intergalactic...
We present 3D resonant radiative transfer simulations of the spatial and spectral diffusion Lya radiation from a central source in host galaxies high column density absorption systems at z ~ 3. The are based on suite cosmological galaxy formation that reproduce wide range observed properties damped systems. emission is predicted to be spatially extended up several arcsec, width broadened hundred (in some case more than thousand) km/s. distribution dynamical state gas simulated complex,...
We explore new observationally constrained subresolution models of galactic outflows and investigate their impact on the circumgalactic medium (CGM) in redshift range z = 2–4. perform cosmological hydrodynamic simulations, including star formation, chemical enrichment four cases supernovae-driven outflows: no wind (NW), an energy-driven constant velocity (CW), a radially varying (RVWa) where outflow has positive correlation with galactocentric distance (r) RVW additional dependence halo mass...
We investigate the properties of triply ionized carbon (C iv) in intergalactic medium (IGM) using a set high resolution and large box size cosmological hydrodynamic simulations Lambda cold dark matter (ΛCDM) model. rely on modification publicly available TreeSPH code gadget-2 that self-consistently follows metal enrichment mechanism by means detailed chemical evolution focus several numerical implementations galactic feedback: winds energy-driven momentum-driven prescriptions,...
In this work, we investigate the abundance and distribution of metals in intergalactic medium (IGM) at 〈z〉 ≃ 2.8 through analysis an ultra-high signal-to-noise ratio UVES spectrum quasar HE0940-1050. C iv forest, our deep is sensitive 3σ to lines with column density down log NCIV 11.4 60 per cent considered redshift range ≃11.1. sample, all H i NHI ≥ 14.8 show associated absorption. 14.0 ≤ < 14.8, 43 has At 14.0, detection rates drop <10 cent, possibly due sensitivity limits not actual...
Cosmological N-body hydrodynamic computations following atomic and molecular chemistry (e$^-$, H, H$^+$, H$^-$, He, He$^+$, He$^{++}$, D, D$^+$, H$_2$, H$_2^+$, HD, HeH$^+$), gas cooling, star formation production of heavy elements (C, N, O, Ne, Mg, Si, S, Ca, Fe, etc.) from stars covering a range mass metallicity are used to explore the origin several chemical abundance patterns study both metal content during simulated galaxy assembly. The resulting trends show remarkable similarity...
At low densities the standard ionisation history of intergalactic medium (IGM) predicts a decreasing temperature IGM with density once hydrogen (and helium) reionisation is complete. Heating high-redshift, low-density above expected from photo-heating difficult, and previous claims high/rising temperatures in regions Universe based on probability function (PDF) opacity Lyman-$α$ forest data at $2
Abstract Background/Objective Vitamin D deficiency (serum 25-hydroxyvitamin [25(OH)D] concentration < 50 nmol/L) is prevalent among Aboriginal and Torres Strait Islander peoples in Australia. Alternative to sun exposure (the primary source of vitamin D), can also be obtained from food (e.g. fish, eggs, meat) supplements. However, the intake this population group unknown. We aimed provide first quantification using nationally representative data peoples. Methods used consumption collected...
Low vitamin D status (circulating 25-hydroxyvitamin [25(OH)D] concentration < 50 nmol/L) affects nearly one in four Australian adults (1) . The primary source of is sun exposure; however, a safe level exposure for optimal production has not been established. As supplement use uneven, increasing food the logical option improving at population level. dietary supply low since few foods are naturally rich D. While there no Australia-specific estimated average requirement (EAR) D, Institute...
With the food system estimated to be responsible for approximately one-third of greenhouse gas emissions (1) there is an urgent need transition healthy and more environmentally sustainable diets. Plant-based ‘milks’ are associated with lower than dairy milks (2) many Australian consumers making substitution (3) . The 2013 Dietary Guidelines advise that plant-based fortified at least 100 mg calcium per ml (e.g., soy, rice or other cereal) can replace milk in diet (4) This study aimed assess...
Abstract Purpose Most plant-based milk-like (PBML) drinks sold in Australia are not fortified with riboflavin, vitamin B12 or iodine. Reduced dairy intake is often recommended for planetary health and the 2013 Australian Dietary Guidelines advise that PBML a suitable replacement cows’ milk if calcium fortified. We investigated likely population-wide impacts on B12, iodine protein usual intakes of drinks. Methods used computer simulation modelling data from 2011–12 National Nutrition Physical...
We present a measurement of the Lyman alpha flux probability distribution function (PDF) measured from set eight high resolution quasar spectra with emission redshifts at 3.3 < z 3.8. carefully study effect metal absorption lines on shape PDF. Metals have larger impact PDF measurements lower redshift, where there are fewer lines. This may be explained by an increase in number which blended toward higher but also due to presence metals intergalactic medium increasing lookback time. provide...
We investigate the evolution of galaxy star formation rate function (SFRF) and cosmic density (CSFRD) z ∼ 1–4 galaxies, using cosmological smoothed particle hydrodynamic (SPH) simulations a compilation ultraviolet (UV), infrared (IR) Hα observations. These tracers represent different populations galaxies with IR light being probe objects high rates dust contents, while UV observations provide census low where mild obscuration occurs. compare above SFRFs results SPH run code P-GADGET3(XXL)....
We study the role of feedback from supernovae and black holes in evolution star formation rate function (SFRF) z~4-7 galaxies. use a new set cosmological hydrodynamic simulations, ANGUS (AustraliaN GADGET-3 early Universe Simulations), run with modified improved version parallel TreePM-smoothed particle hydrodynamics code called P-GADGET3(XXL), that includes self-consistent implementation stellar metal enrichment. In our simulations both Supernova (SN) driven galactic winds Active Galactic...
Abstract The relation between the star-formation Rate and stellar mass ( M ⋆ ) of galaxies represents a fundamental constraint on galaxy formation, has been studied extensively both in observations cosmological hydrodynamic simulations. However, observed amplitude rate—stellar not successfully reproduced simulations, indicating either that halo accretion history baryonic physics are poorly understood/modelled or contain biases. In this paper, we examine evolution SFR − z ~ 1–4 display...
We investigate the evolution of star formation rate-stellar mass relation (SFR-M*) and Galaxy Stellar Mass Function (GSMF) z ~ 4-7 galaxies, using cosmological simulations run with smoothed particle hydrodynamics code P-GADGET3(XXL). explore effects different feedback prescriptions (supernova driven galactic winds AGN feedback), initial stellar functions metal cooling. show that our fiducial model, strong energy-driven early feedback, is able to reproduce observed function obtained from...
Abstract The world's most complex climate models are currently running a range of experiments as part the Sixth Coupled Model Intercomparison Project (CMIP6). Added to output from Fifth (CMIP5), total data volume will be in order 20PB. Here, we present dataset annual, monthly, global, hemispheric and land/ocean means derived selection key interest analysts reduced complexity modellers. is validating, calibrating developing against behaviour more physically complete models. In addition its...
We present a theoretical study of intergalactic metal absorption lines imprinted in the spectra distant quasars during and after Epoch Reionization (EoR). use high resolution hydrodynamical simulations at redshift ($4 <z<8$), assuming uniform UV background Haardt--Madau 12, post-processing with CLOUDY photoionization models Voigt profile fitting to accurately calculate column densities ions CII, CIV, SiII, SiIV OI medium (IGM). In addition, we generate mock observations neutral Hydrogen (HI)...
Abstract Recent advances in bioinformatics and high-throughput sequencing have enabled the large-scale recovery of genomes from metagenomes. This has potential to bring important insights as researchers can bypass cultivation analyze sourced directly environmental samples. There are, however, technical challenges associated with this process, most notably complexity computational workflows required process metagenomic data, which include dozens software tools, each their own set customizable...