A5050819710- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Streptococcal Infections and Treatments
- Relativity and Gravitational Theory
- Inflammasome and immune disorders
- Black Holes and Theoretical Physics
- Forensic and Genetic Research
- Viral Infections and Vectors
- Internet of Things and Social Network Interactions
- Real-time simulation and control systems
- Geophysics and Sensor Technology
- Spectroscopy and Laser Applications
- Scientific Research and Discoveries
- Seismic Waves and Analysis
- Radiation Detection and Scintillator Technologies
- Gene expression and cancer classification
The Kids Research Institute Australia
2025
Curtin University
2016-2024
International Centre for Radio Astronomy Research
2016-2024
Centre National de la Recherche Scientifique
2012-2017
Chalmers University of Technology
2014-2017
Shandong University
2017
Institut d'Astrophysique de Paris
2012-2016
European Southern Observatory
2012-2014
Astronomy and Space
2012-2014
Commonwealth Scientific and Industrial Research Organisation
2012-2014
The far-infrared fine-structure line [CII] at 1900.5\,GHz is known to be one of the brightest cooling lines in local galaxies, and therefore it has been suggested an efficient tracer for star-formation very high-redshift galaxies. However, recent results galaxies $z>6$ have yielded numerous non-detections star-forming except quasars submillimeter We report ALMA observations two lensed, $z = 6.029$ $z=6.703$. galaxy A383-5.1 (star formation rate [SFR] 3.2 M$_\odot$ yr$^{-1}$ magnification...
We present results from a survey of 70 radio galaxies (RGs) at redshifts 1<z<5.2 using the PACS and SPIRE on-board Herschel. Combined with existing mid-IR photometry Spitzer observations obtained LABOCA, SEDs in our sample are continuously covered across 3.6-870um. The total infrared luminosities these RGs such that they almost all either ultra-or hyper-luminous galaxies. fit set empirical templates which represent dust heated (1) by variety SB (2) AGN. find require to be both AGN SB, but...
We present a CO(1–0) survey for cold molecular gas in representative sample of 13 high-z radio galaxies (HzRGs) at 1.4 < z 2.8, using the Australia Telescope Compact Array. detect emission associated with five sources: MRC 0114-211, 0152-209, 0156-252, 1138-262 and 2048-272. The luminosities are range |$L^{\prime }_{\rm CO} \sim (5\hbox{--}9) \times 10^{10}$| K km s−1 pc2. For 0152-209 1138-262, part coincides galaxy, while is spread on scales tens kpc likely galaxy mergers. mass derived...
We present a detailed study of the infrared spectral energy distribution high-redshift radio galaxy MRC 1138-26 at z = 2.156, also known as Spiderweb Galaxy. By combining photometry from Spitzer, Herschel and LABOCA we fit rest-frame 5-300 um emission using two component, starburst active galactic nucleus (AGN), model. The total (8 - 1000 um) luminosity this is (1.97+/-0.28)x10^13 Lsun with (1.17+/-0.27) (0.79+/-0.09)x10^13 due to AGN components respectively. high derived accretion rate...
We present 0.̋5 resolution ALMA detections of the observed 246 GHz continuum, [CI] 3P2→3P1 fine structure line ([CI]2–1), CO(7–6), and H2O lines in z = 2.161 radio galaxy MRC1138-262, so-called Spiderweb galaxy. detect strong [CI]2–1 emission both at position core, a second component ~4 kpc away from it. The 1100 km s-1 broad this latter component, combined with its H2 mass 1.6 × 1010 M⊙, implies that must come compact region <60 pc, possibly containing active galactic nucleus (AGN). derived...
We compare the kinetic energy and momentum injection rates from intense star formation, bolometric AGN radiation, radio jets with observed in warm ionized gas 24 powerful galaxies at z~2. These are amongst our best candidates for being massive near end of their active formation period, when quasar activity, all co-exist. All have VLT/SINFONI imaging spectroscopy rest-frame optical line emission, showing emission-line regions large velocity offsets (up to 1500 km/s) widths (typically 800-1000...
We report a detailed CO(1−0) survey of galaxy protocluster field at z = 2.16, based on 475 h observations with the Australia Telescope Compact Array. constructed large mosaic 13 individual pointings, covering an area 21 arcmin 2 and ±6500 km s −1 range in velocity. obtained robust sample 46 detections spanning 2.09 − 2.22, constituting largest molecular gas measurements protoclusters to date. The CO emitters show overdensity 2.12 2.21, suggesting super-protocluster or connected large-scale...
We examine the relative orientation of radio jets and dusty tori surrounding active galactic nucleus (AGN) in powerful galaxies at z > 1. The core dominance serves as an indicator, measuring ratio between anisotropic Doppler-beamed emission isotropic lobe emission. Assuming a fixed cylindrical geometry for hot, torus, we derive its inclination i by fitting optically-thick radiative transfer models to spectral energy distributions obtained with Spitzer Space Telescope. find highly significant...
We utilize a Bayesian approach to fit the observed mid-IR-to-submm/mm spectral energy distributions (SEDs) of 22 WISE-selected and submm-detected, hyperluminous hot dust-obscured galaxies. By adopting Torus+GB model, we decompose IR SEDs Hot DOGs into torus cold dust components. The main results are: 1) in our submm-detected sample are hyperluminous, with emission dominating output. However, is non-negligible, averagely contributing ~24% total luminosity. 2) Compared QSO starburst SED...
We report the results of a pilot study CO$(4-3)$ emission line three {\it WISE}-selected hyper-luminous, dust-obscured quasars (QSOs) with sensitive ALMA Band 3 observations. These obscured QSOs $L_{\rm bol}>10^{14}L_\odot$ are among most luminous objects in universe. All QSO hosts clearly detected both continuum and line. Based on detection, we derive molecular gas masses ($\sim 10^{10-11}$ M$_\odot$), suggesting that these gas-rich systems. find our sample follow similar $L'_{\rm CO}-...
Using MUSE on the ESO-VLT, we obtained a 4 hour exposure of z=3.12 radio galaxy MRC0316-257. We detect features down to ~10^-19 erg/s/cm^2/arcsec^2 with highest surface brightness regions reaching more than factor 100 higher. find Ly-alpha emission out ~250 kpc in projection from active galactic nucleus (AGN). The shows arc-like morphologies arising at 150-250 connected filamentary structures into circum-nuclear region. most distant arc is offset by 700 km/s relative HeII 1640 emission,...
<title>Abstract</title> Acute Rheumatic Fever (ARF) is a systemic inflammatory condition triggered by Group A Streptococcus infection, with timely diagnosis critical to prevent Heart Disease. ARF pathogenesis poorly understood and based on clinical criteria. Here, we compared cases well-defined controls from two Uganda cohorts. We identified 5-protein signature that discriminates patients clinically-similar conditions (receiver operating characteristic-area under the curve (ROC-AUC)=1.0,...
In the low-redshift Universe, most powerful radio sources are often associated with gas-rich galaxy mergers or interactions. We here present evidence for an advanced, (`wet') merger a at redshift of z~2. This galaxy, MRC 0152-209, is infrared-luminous high-redshift known in southern hemisphere. Using Australia Telescope Compact Array, we obtained high-resolution CO(1-0) data cold molecular gas, which complement HST/WFPC2 imaging and WHT long-slit spectroscopy. find that, while roughly M(H2)...
Using the new evolutionary code Pégase.3, we undertook an spectral synthesis of optical–IR–submm energy distribution two distant (z = 3.8) radio galaxies, 4C 41.17 and TN J2007−1316. These galaxies were selected from HeRGÉ (Herschel Radio Galaxies Evolution) Project in particular for their faint active galactic nucleus contribution because they show evidence a large stellar to bolometric luminosity. Pégase.3 coherently models reprocessing luminosity dust emission, allowing us build UV...
We present results of CO(1-0) spectroscopic observations 10 SDSS type 2 quasars (QSO2) at z~0.2-0.3 observed with the 30m IRAM radiotelescope and Australia Telescope Compact Array. report 5 new confirmed detections 1 tentative detection. They have L'(CO)~several x 1e9 K km s-1 pc^2, while upper limits for non are L'(CO)<~ several pc^2. This study increases total number QSO2 CO measurements z<~1 to 20, a 50% detection rate.
The Dragonfly Galaxy (MRC 0152-209), at redshift z ~ 2, is one of the most vigorously star-forming radio galaxies in Universe. What triggered its activity? We present ALMA Cycle 2 observations cold molecular CO(6−5) gas and dust, which reveal that this likely a gas-rich triple merger. It consists close double nucleus (separation ~4 kpc) weak CO-emitter ~10 kpc distance, all have counterparts HST/NICMOS imagery. hyper-luminous starburst powerful radio-AGN were precoalescent stage traces dense...
ABSTRACT We present the selection of high-redshift (z ≳ 5.7) radio-loud (RL) quasi-stellar object (QSO) candidates from combination radio Rapid ASKAP Continuum Survey (RACS; at 888 MHz) and optical/near-infrared Dark Energy (DES). In particular, we selected six brighter than $S_{\rm 888\, MHz}\gt 1$ mJy beam−1 mag(zDES) &lt; 21.3 using dropout technique (in i-band). From this sample, were able to confirm high-z nature ∼ 6.1) two sources, which are now among highest redshift RL QSOs...
ABSTRACT This paper presents the results of 475h interferometric observations with Australia Telescope Compact Array towards Spiderweb protocluster at z=2.16. We search for large, extended molecular gas reservoirs among 46 previously detected CO(1−0) emitters, employing a customised method we developed. Based on CO emission images and position–velocity diagrams, as well ranking sources using binary weighting six different criteria, have identified 14 robust 7 tentative candidates that...
We present 0.3" (band 6) and 1.5" 3) ALMA observations of the (sub)millimeter dust continuum emission for 25 radio galaxies at 1<z<5.2. Our survey reaches a rms flux density ~50$\mu$Jy in band 6 ~20$\mu$Jy 3. This is an order magnitude deeper than single-dish 850 $\mu$m observations, fluxes where synchrotron thermal are expected to be same magnitude. Combining our sensitive with data from ATCA, VLA, IR photometry Herschel Spitzer, we have disentangled emission. determine star-formation rates...
We present a pilot study of the z=2.923 radio galaxy MRC0943-242, where we for first time combine information from ALMA and MUSE data cubes. Even with modest integration times, disentangle an AGN starburst dominated set components. These reveal highly complex morphology, as AGN, starburst, molecular gas components show up widely separated sources in dust continuum, optical continuum CO line emission observations. CO(1-0) CO(8-7) suggest that there is reservoir offset both located ~90kpc AGN....
The recent detection of the quasi-stellar object (QSO) VIKING J231818.3$-$311346 (hereafter VIK J2318$-$3113) at redshift $z=6.44$ in Rapid ASKAP Continuum Survey (RACS) uncovered its radio-loud nature, making it one most distant known to date this class. By using data from several radio surveys Galaxy and Mass Assembly 23$^\mathrm{h}$ field dedicated follow-up, we were able constrain spectrum J2318$-$3113 observed range $\sim$0.1--10 GHz. At high frequencies (0.888--5.5 GHz frame) QSO...
The Dragonfly Galaxy (MRC0152-209), at redshift z~2, is one of the most vigorously star-forming radio galaxies in Universe. What triggered its activity? We present ALMA Cycle 2 observations cold molecular CO(6-5) gas and dust, which reveal that this likely a gas-rich triple merger. It consists close double nucleus (separation ~4 kpc) weak CO-emitter ~10 kpc distance, all have counterparts HST/NICMOS imagery. hyper-luminous starburst powerful radio-AGN were precoalescent stage traces dense...
We measure the sizes of redshift ∼2 star-forming galaxies by stacking data from Atacama Large Millimeter/submillimeter Array (ALMA). use a uv-stacking algorithm in combination with model fitting uv-domain and show that this allows for robust measures marginally resolved sources. The analysis is primarily based on 344 GHz ALMA continuum observations centred 88 submillimetre LABOCA ECDFS Submillimeter Survey (ALESS). study several samples at z ≈ 2 M* 5 × 1010 M⊙, selected using near-infrared...
We present a study of the complete ultraviolet to submillimetre spectral energy distributions (SEDs) twelve 3CR radio galaxy hosts in redshift range $1.0 < z 2.5$, which were all detected far-infrared by Herschel Space Observatory. The employs new spectro-chemical evolutionary code P\'EGASE.3, combination with recently published clumpy AGN torus models. uncover properties massive host stellar populations, luminosities, and recent starbursts, had earlier been inferred these objects from their...