A5048303198- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Plant Water Relations and Carbon Dynamics
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Astronomical Observations and Instrumentation
Durham University
2017-2023
International Centre for Radio Astronomy Research
2019-2023
The University of Western Australia
2019-2023
ARC Centre of Excellence for All-sky Astrophysics
2022
ASTRO-3D
2022
University of Oxford
2016-2020
The KMOS Redshift One Spectroscopic Survey (KROSS) is an ESO-guaranteed time survey of 795 typical star-forming galaxies in the redshift range z = 0.8–1.0 with instrument on Very Large Telescope. In this paper, we present resolved kinematics and star formation rates for 584 ∼ 1 galaxies. This constitutes largest near-infrared Integral Field Unit at to date. We demonstrate success our selection criteria 90 per cent targets found be H α emitters, which 81 are spatially resolved. fraction KROSS...
We analyse the velocity dispersion properties of 472 z ∼ 0.9 star-forming galaxies observed as part KMOS Redshift One Spectroscopic Survey (KROSS). The majority this sample is rotationally dominated (83 ± 5 per cent with vC/σ0 > 1) but also dynamically hot and highly turbulent. After correcting for beam smearing effects, median intrinsic final σ0 = 43.2 0.8 km s−1 a rotational to ratio 2.6 0.1. To explore relationship between dispersion, stellar mass, star formation rate, redshift, we...
We present dynamical measurements for 586 H-alpha detected star-forming galaxies from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey (KROSS). The sample represents typical at this redshift (z=0.6-1.0), with a median star formation rate of ~7 Msol/yr and stellar mass range log[M/Msol]~9-11. find that rotation velocity-stellar relationship (the inverse Tully-Fisher relationship) our rotationally-dominated sources (v/sigma>1) has consistent slope normalisation as...
We analyse maps of the spatially resolved nebular emission ≈1500 star-forming galaxies at z ≈ 0.6–2.2 from deep K-band Multi-Object Spectrograph and MUSE observations to measure average shape their rotation curves. use these test claims for declining curves large radii in 1–2 that have been interpreted as evidence an absence dark matter. show curves, extent which they decline beyond peak velocities, depends upon normalization prescription used construct curve. Normalizing size by galaxy...
As part of our KMOS AGN Survey at High-redshift (KASHz), we present spatially-resolved VLT/KMOS and VLT/SINFONI spectroscopic data ALMA 870$μ$m continuum imaging eight $z$=1.4--2.6 moderate ($L_{\rm 2-10 \rm kev}$ = $10^{42} - 10^{45}$ ergs s$^{-1}$). We map [OIII], H$α$ rest-frame FIR emission to search for any spatial anti-correlation between ionised outflows (traced by the [OIII] line) star formation (SF; traced FIR), that has previously been claimed some high-z used as evidence negative...
We present the stellar mass ($M_{*}$), and K-corrected $K$-band absolute magnitude ($M_{K}$) Tully-Fisher relations (TFRs) for sub-samples of 584 galaxies spatially resolved in H$\alpha$ emission by KMOS Redshift One Spectroscopic Survey (KROSS). model velocity field each KROSS extract a rotation velocity, $V_{80}$ at radius equal to major axis an ellipse containing 80% total integrated flux. The large sample size allowed us select 210 with well measured speeds. from this further 56 that are...
We construct Tully-Fisher relations (TFRs), from large samples of galaxies with spatially-resolved H$\alpha$ emission maps the K-band Multi-Object Spectrograph (KMOS) Redshift One Spectroscopic Survey (KROSS) at $z\approx1$. compare these to data Sydney-Australian-Astronomical-Observatory Multi-object Integral-Field (SAMI) Galaxy $z\approx0$. stringently match quality latter former, and apply identical analysis methods sub-sample selection criteria both conduct a direct comparison absolute...
We present an analysis of the gas outflow energetics from KMOS observations ∼ 529 main-sequence star-forming galaxies at z 1 using broad, underlying H α and forbidden lines [N ii] [S ii]. Based on stacked spectra for a sample with median star-formation rates stellar masses SFR = 7 M⊙ yr−1 M⋆ (1.0 ± 0.1) × 1010 M⊙, respectively, we derive typical mass rate |$\dot{M}_{\rm wind}$| 1–4 loading / 0.2–0.4. By comparing kinetic energy in wind released by supernovae, estimate coupling efficiency...
We present first results from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey, an ongoing large kinematical survey of a thousand, z ∼ 1 star-forming galaxies, with VLT KMOS. Out targeted galaxies (∼500 so far), we detect and spatially resolve Hα emission in ∼90 77 per cent sample, respectively. Based on integrated flux measurements resolved maps, derive median star formation rate (SFR) ∼7.0 M⊙ yr−1 physical size 〈|$r^{\prime }_{\rm 1/2}$|〉 = 5.1 kpc. combine...
We present the stellar mass (M_*) and Wide-Field Infrared Survey Explorer (WISE) absolute Band 1 magnitude (M_W1) Tully-Fisher relations (TFRs) of subsets galaxies from CO Legacy Database for Galex Arecibo SDSS (COLD GASS). examine benefits drawbacks several commonly used fitting functions in context measuring CO(1-0) line widths (and thus rotation velocities), favouring Gaussian Double Peak function. find M_W1 M_* TFR, a carefully selected sub-sample, to be = (-7.1 +/- 0.6) [log(W_50/sin i)...
We present an analysis of the chemical abundance properties $\approx$650 star-forming galaxies at $z \approx0.6-1.8$. Using integral-field observations from $K$-band Multi-Object Spectrograph (KMOS), we quantify [NII]/H$\alpha$ emission-line ratio, a proxy for gas-phase Oxygen within interstellar medium. define stellar mass-metallicity relation \approx0.6-1.0$ and \approx1.2-1.8$ analyse correlation between scatter in fundamental galaxy (e.g. H$\alpha$ star-formation rate, specific rotation...
We present first results from the KMOS Ultra-deep Rotation Velocity Survey (KURVS), aimed at studying outer rotation curves shape and dark matter content of 22 star-forming galaxies $z\sim1.5$. These represent `typical' discs $z \sim 1.5$, being located within main sequence stellar mass-size relation with masses $9.5\leqslant$log$(M_{\star}/\mathrm{M_{\odot}})\leqslant11.5$. extract individual out to 4 times effective radius, on average, or $\sim 10-15$ kpc. Most are flat rising between...
We present adaptive optics assisted integral field spectroscopy of 34 star-forming galaxies at $z$ = 0.8-3.3 selected from the HiZELS narrow-band survey. measure kinematics ionised interstellar medium on $\sim$1 kpc scales, and show that are turbulent, with a median ratio rotational to dispersion support $v$/$\sigma$=0.82$\pm$0.13. combine dynamics high-resolution rest-frame optical imaging extract emission line rotation curves. high-redshift follow similar power-law trend in specific...
ABSTRACT We present the KMOS Galaxy Evolution Survey (KGES), a K-band Multi-Object Spectrograph (KMOS) study of H α and [N ii] emission from 288 K-band-selected galaxies at 1.2 ≲ z 1.8, with stellar masses in range $\log _{10}(M_{*}/\rm {M}_{\odot })\approx 9$ – 11.5. In this paper, we describe survey design, sample, discuss key properties KGES galaxies. combine appropriately matched samples lower redshifts Redshift One Spectroscopic (KROSS) SAMI Survey. Accounting for effects sample...
We present an analysis of the gas dynamics star-forming galaxies at z~1.5 using data from KMOS Galaxy Evolution Survey (KGES). quantify morphology $HST$ CANDELS imaging parametrically and non-parametrically. combine H$\alpha$ with high-resolution to derive relation between stellar mass (M$_{*}$) specific angular momentum (j$_{*}$). show that high-redshift follow a power-law trend in similar local late-type form j$_*$$\propto$M$_*^{0.53 \pm 0.10}$. The highest are mostly disc-like, although...
We present stellar specific angular momentum $j_*$ measurements of two $z\sim 1.5$ galaxies in the KGES sample and 12 DYNAMO 0.1$ analogues high-redshift galaxies. combine natural seeing integral field spectroscopic data to trace line emission out high multiples effective radius $r_e$, with adaptive optics assisted Keck/OSIRIS observations rapid rise rotation curve inner regions. Our spaxel-wise integration method gives results that are on average within measurement uncertainty traditional...
ABSTRACT We present the KMOS-CLASH (K-CLASH) survey, a K-band Multi-Object Spectrograph (KMOS) of spatially resolved gas properties and kinematics 191 (pre-dominantly blue) H α-detected galaxies at 0.2 ≲ z 0.6 in field cluster environments. K-CLASH targets four Cluster Lensing And Supernova survey with Hubble (CLASH) fields KMOS IZ-band, over 7 arcmin radius (≈2–3 Mpc) view. aims to study transition star-forming from turbulent, highly disc-like peculiar systems ≈ 1–3, comparatively...
Galaxy clusters have long been theorised to quench the star-formation of their members. This study uses integral-field unit observations from $K$-band Multi-Object Spectrograph (KMOS) - Cluster Lensing And Supernova survey with Hubble (CLASH) (K-CLASH) search for evidence quenching in massive galaxy at redshifts $0.3<z<0.6$. We first construct mass-matched samples exclusively star-forming cluster and field galaxies, then investigate spatial extent H$\alpha$ emission interstellar medium...
We exploit the unprecedented depth of integral field data from KMOS Ultra-deep Rotational Velocity Survey (KURVS) to analyse strong (H$\alpha$) and forbidden ([NII], [SII]) emission line ratios in 22 main-sequence galaxies at $z\approx1.5$. Using [NII]/H$\alpha$ emission-line ratio we confirm presence stellar mass $-$ gas-phase metallicity relation this epoch, with exhibiting on average 0.13$\pm$0.04 dex lower (12+log(O/H)$_{\rm M13}$=8.40$\pm$0.03) for a given ($\log_{10}$($M_{\rm...
The Tully–Fisher relation (TFR) is an empirical between galaxy luminosity and rotation velocity. We present here the first TFR of galaxies beyond local Universe that uses carbon monoxide (CO) as kinematic tracer. Our final sample includes 25 isolated, non-interacting star-forming with double-horned or boxy CO integrated line profiles located at redshifts z ≤ 0.3, drawn from a larger ensemble 67 detected objects. best reverse Ks-band, stellar mass baryonic TFRs are, respectively,...
ABSTRACT We present SAMI-H i, a survey of the atomic hydrogen content 296 galaxies with integral field spectroscopy available from SAMI Galaxy Survey. The sample spans nearly 4 dex in stellar mass ($M_\star = 10^{7.4}-10^{11.1}~ \rm M_\odot$), redshift z &lt; 0.06, and includes new Arecibo observations 153 galaxies, for which we release catalogues H i spectra. use these data to compare rotational velocities obtained optical radio show how systematic differences affect slope scatter...
We use KMOS Deep Survey (KDS) galaxies, combined with results from a range of spectroscopic studies in the literature, to investigate evolution stellar-mass Tully-Fisher relation since z ~ 4. determine slope and normalisation local rotation-velocity -- (Vc - $M_{\star}$) relationship using reference sample spiral galaxies; thereafter we fix slope, focus on velocity redshift. The rotation-dominated KDS galaxies at 3.5 have rotation velocities -0.1 dex lower than fixed stellar mass. By fitting...
ABSTRACT We present detailed stellar specific angular momentum (j*) measurements of 10 star-forming galaxies at z ∼ 1.5−2, using both high and low spatial resolution integral field spectroscopic data. developed a code that simultaneously models the adaptive optics (AO) assisted observations from OSIRIS/SINFONI along with their natural seeing (NS) counterparts KMOS resolutions [0.1−0.4] arcsec [0.6−1.0] arcsec, respectively. The AO data reveal 2/10 systems to be mergers for remaining eight...
We present an analysis of the gas outflow energetics 529 main-sequence star-forming galaxies at z~1 using KMOS observations broad, underlying H-alpha and forbidden lines [N II] [S II]. Based on stacked spectra for a sample with median star-formation rates stellar masses SFR ~ 7 Mo/yr M* = (1.0+/-0.1)x10^10 Mo respectively, we derive typical mass rate dM/dt 1-4 loading dM/dt/SFR 0.2--0.4. The wind does not show strong trend over range 2--20 Mo/yr, although identify such that M*^(0.26+/-0.07)....