Martin Bureau
A5022389742- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Orthopaedic implants and arthroplasty
- Polymer crystallization and properties
- Bone Tissue Engineering Materials
- Polymer Nanocomposites and Properties
- Mechanical Behavior of Composites
- Scientific Research and Discoveries
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Radio Astronomy Observations and Technology
- Plant Water Relations and Carbon Dynamics
- Total Knee Arthroplasty Outcomes
- biodegradable polymer synthesis and properties
- Polymer Foaming and Composites
- Electrospun Nanofibers in Biomedical Applications
- Advanced materials and composites
- Phase Equilibria and Thermodynamics
- Calibration and Measurement Techniques
- Structural Behavior of Reinforced Concrete
University of Oxford
2016-2025
Yonsei University
2019-2023
National Research Council Canada
2007-2020
McGill University
2010-2020
National Academies of Sciences, Engineering, and Medicine
2006-2014
Polytechnique Montréal
1997-2011
Toronto Metropolitan University
2008
Institut National de la Recherche Scientifique
2001-2007
Columbia University
2002-2005
Laboratoire d’Astrophysique de Marseille
2004
We investigate with unprecedented accuracy the correlations between dynamical mass-to-light ratio M/L and other global observables of E S0 galaxies. construct two-integral Jeans three-integral Schwarzschild models for a sample 25 E/S0 galaxies SAURON integral-field stellar kinematics. find tight correlation form (M/L)=(3.80+/-0.14)*(sigma/200 km/s)^(0.84+/-0.07) (in I-band) luminosity-weighted second moment (sigma) line-of-sight velocity-distribution within Re. The observed rms scatter in...
This paper documents the seventeenth data release (DR17) from Sloan Digital Sky Surveys; fifth and final fourth phase (SDSS-IV). DR17 contains complete of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal surveying over 10,000 nearby galaxies. The MaNGA Stellar Library (MaStar) accompanies this data, providing observations almost 30,000 stars through instrument during bright time. also Galactic Evolution Experiment 2 (APOGEE-2) survey publicly...
The ATLAS3D project is a multiwavelength survey combined with theoretical modelling effort. observations span from the radio to millimetre and optical, provide multicolour imaging, two-dimensional kinematics of atomic (H i), molecular (CO) ionized gas (Hβ, [O iii] [N i]), together population stars Fe5015 Mg b), for carefully selected, volume-limited (1.16 × 105 Mpc3) sample 260 early-type (elliptical E lenticular S0) galaxies (ETGs). models include semi-analytic, N-body binary mergers...
We present the emission-line fluxes and kinematics of 48 representative elliptical lenticular galaxies obtained with our custom-built integral-field spectrograph SAURON. Hb, [OIII], [NI] emission lines were measured using a new procedure that simultaneously fits both stellar spectrum lines. Using this technique we can detect down to an equivalent width 0.1A set by current limitations in describing galaxy spectra synthetic real templates, rather than quality spectra. Emission is detected 75%...
2D stellar kinematics of 48 representative E and S0 galaxies obtained with the SAURON IFS reveal that early-type appear in two broad flavours, depending on whether they exhibit clear large-scale rotation or not. We define a new parameter LambdaR which involves luminosity weighted averages over full kinematic field, as proxy to quantify observed projected angular momentum per unit mass. use it basis for classification: are separated into slow fast rotators (SRs, FRs), have values within their...
We provide a census of the apparent stellar angular momentum within 1 Re volume-limited sample 260 early-type galaxies (ETGs) in nearby Universe, using integral-field spectroscopy obtained course ATLAS3D project. exploit LambdaR parameter to characterise existence two families ETGs: Slow Rotators which exhibit complex velocity fields and often include kinematically Distinct Cores (KDCs), Fast have regular fields. Our complete ETGs leads new criterion disentangle now includes dependency on...
We study the volume-limited and nearly mass selected (stellar M>6*10^9 Msun) Atlas3D sample of 260 early-type galaxies. construct detailed axisymmetric dynamical models (JAM), which allow for orbital anisotropy, include a dark matter halo, reproduce in detail both galaxy images high-quality integral-field stellar kinematics. derive accurate total M/L fractions f_DM, within sphere radius r=Re. also measure median fraction f_DM=13%. find that thin two-dimensional subset spanned by galaxies...
In the companion Paper XV of this series, we derive accurate total mass-to-light ratios |$(\rm M/L)_{\rm JAM}\approx ({\rm M/L})({\it r}= {R_{\rm e}})$| within a sphere radius |$r= e}}$| centred on galaxy, as well stellar (M/L)stars (with dark matter removed) for volume-limited and nearly mass-selected (stellar mass |$M_\star \gtrsim 6\times 10^9 {\,\mathrm{M}_{\odot }}$|) ATLAS3D sample 260 early-type galaxies (ETGs, ellipticals Es lenticulars S0s). Here, use those parameters to study two...
We analyse the orbital distribution of E and S0 galaxies using SAURON integral-field stellar kinematics. construct anisotropy (V/sigma,epsilon) diagram, for 48 E/S0 from survey. For a subsample 24 consistent with axisymmetry, we use three-integral axisymmetric Schwarzschild dynamical models to recover detailed find good agreement derived diagram. In companion Paper IX show that early-type can be subdivided into two classes systems or without significant amount specific angular momentum. Here...
Early results are reported from the SAURON survey of kinematics and stellar populations a representative sample nearby E, S0 Sa galaxies. The is aimed at determining intrinsic shape galaxies, their orbital structure, mass-to-light ratio as function radius, age metallicity populations, frequency kinematically decoupled cores nuclear black holes. construction described, its properties illustrated. A comparison with long-slit spectroscopic data establishes that measurements comparable to, or...
A new integral-field spectrograph, SAURON, is described. It based on the TIGER principle, and uses a lenslet array. SAURON has large field of view high throughput, allows simultaneous sky subtraction. Its design optimized for studies stellar kinematics, gas line-strength distributions nearby early-type galaxies. The instrument specifications are described, as well extensive analysis software which was developed to obtain fully calibrated spectra, associated kinematic measurements. companion...
We present the stellar kinematics of 48 representative elliptical and lenticular galaxies obtained with our custom-built integral-field spectrograph SAURON operating on William Herschel Telescope. The data were homogeneously processed through a dedicated reduction analysis pipeline. All resulting cubes spatially binned to constant minimum signal-to-noise ratio. have measured an optimized (penalized pixel-fitting) routine which fits spectra in pixel space, via use optimal templates, prevents...
[Abridged] We use the ATLAS3D sample of 260 early-type galaxies (ETGs) to study apparent kinematic misalignment angle, Psi, defined as angle between photometric and major axis. find that 71% nearby ETGs are strictly aligned systems (Psi > 5 deg), an additional 14% have < Psi 10 deg 90% 15 deg. Taking into account measurement uncertainties, can be considered better than deg, suggesting only a small fraction (~10%) not consistent with axisymmetry within projected half-light radius. identify...
In Paper I of this series we introduced a volume-limited parent sample 871 galaxies from which extracted the ATLAS3D 260 early-type (ETGs). Papers II and III classified ETGs using their stellar kinematics, in way that is nearly insensitive to projection effects, separated them into fast slow rotators. Here look at galaxy morphology note edge-on rotators generally are lenticular galaxies. They appear like spiral with gas dust removed, some cases flat ellipticals (E5 or flatter) discy...
We present the stellar population content of early-type galaxies from Atlas3D survey. Using spectra integrated within apertures covering up to one effective radius, we apply two methods: based on measuring line-strength indices and applying single (SSP) models derive SSP-equivalent values age, metallicity, alpha enhancement; spectral fitting non-parametric star-formation histories, mass-weighted average half-mass formation timescales. homogeneously derived radii dynamically-determined galaxy...
We present the Atlas3D HI survey of 166 nearby early-type galaxies (ETGs) down to M(HI)~10^7 M_sun. detect in ~40% all ETGs outside Virgo cluster and ~10% inside it. This demonstrates that it is common for non-cluster host HI. The morphology varies from regular discs/rings (the majority detections) unsettled gas distributions. former are either small discs (M(HI)<10^8 M_sun) confined within stellar body sharing same kinematics stars, or large (M(HI) up 5x10^9 extending tens kpc galaxy...
This paper documents the sixteenth data release (DR16) from Sloan Digital Sky Surveys; fourth and penultimate phase (SDSS-IV). is first of southern hemisphere survey Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new APOGEE-2 North are also included. DR16 notable as final for main cosmological program Extended Baryon Oscillation Spectroscopic Survey (eBOSS), all raw reduced spectra that project released here. includes Time Domain (TDSS) SPectroscopic IDentification...
Galactic archeology based on star counts is instrumental to reconstruct the past mass assembly of Local Group galaxies. The development new observing techniques and data-reduction, coupled with use sensitive large field view cameras, now allows us pursue this technique in more distant galaxies exploiting their diffuse low surface brightness (LSB) light. As part Atlas3D project, we have obtained MegaCam camera at Canada-France Hawaii Telescope extremely deep, multi--band, images nearby...
We present a detailed two-dimensional stellar dynamical analysis of sample 44 cosmological hydrodynamical simulations individual central galaxies and their satellites. Kinematic maps the line-of-sight velocity, velocity dispersion, higher-order Gauss-Hermite moments $h_3$ $h_4$ are constructed for each galaxy most massive The amount rotation is quantified using $\lambda_{\mathrm{R}}$-parameter. $h_3$, fields simulated show diversity similar to observed kinematic early-type in...
We have carried out a survey for 12CO J=1-0 and J=2-1 emission in the 260 early-type galaxies of volume-limited Atlas3D sample, with goal connecting their star formation assembly histories to cold gas content. This is largest CO its kind first include many Virgo Cluster members. Sample members are dynamically hot median stellar mass 3\times 10^{10} Msun; they selected by morphology rather than colour, bulk them lie on red sequence. The overall detection rate 56/259 = 0.22 \error 0.03, no...
We make use of interferometric CO and HI observations, optical integral-field spectroscopy to probe the origin molecular ionised interstellar medium (ISM) in local early-type galaxies (ETGs). find that 36\pm5% our sample fast rotating ETGs have their gas kinematically misaligned with respect stars, setting a strong lower limit on importance externally acquired (e.g. from mergers cold accretion). Slow rotators flat distribution misalignments, indicating dominant source is external. The...
We report the discovery of a powerful molecular wind from nucleus non-interacting nearby S0 field galaxy NGC 1266. The single-dish CO profile exhibits emission to ±400 km s−1 and requires nested Gaussian fit be properly described. Interferometric observations reveal massive, centrally concentrated component with mass 1.1 × 109 M☉ outflow ≈2.4 107 M☉. gas close systemic velocity consists rotating, compact about 4.1 108 within radius ≈60 pc. This has surface density ≈2.7 104 pc−2, more than...
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...
Following our study on the incidence, morphology and kinematics of ionised gas in early-type galaxies we now address question what is powering observed nebular emission. To constrain likely sources excitation, resort to a variety ancillary data, draw from complementary information kinematics, stellar populations galactic potential SAURON use SAURON-specific diagnostic diagram juxtaposing [OIII]/Hb [NI]/Hb line ratios. We find tight correlation between surface brightness flux Hb recombination...