A5010281384- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Spectroscopy and Laser Applications
- Gamma-ray bursts and supernovae
- Phase Equilibria and Thermodynamics
- Astrophysics and Cosmic Phenomena
- Classical Antiquity Studies
- Heavy metals in environment
- Intermetallics and Advanced Alloy Properties
- Heusler alloys: electronic and magnetic properties
- Bacteriophages and microbial interactions
- Impact of Light on Environment and Health
- Medical and Biological Ozone Research
- Plant Taxonomy and Phylogenetics
- Flood Risk Assessment and Management
- Radio Astronomy Observations and Technology
- Organizational Management and Innovation
- Coal and Its By-products
- Child Therapy and Development
- Advanced Measurement and Detection Methods
- Computational Physics and Python Applications
- Astronomical Observations and Instrumentation
- Tropical and Extratropical Cyclones Research
Herzberg Institute of Astrophysics
2022-2024
McMaster University
2018-2023
Swinburne University of Technology
2015-2020
International Centre for Radio Astronomy Research
2016-2017
The University of Western Australia
2016-2017
North Carolina State University
1981
In this paper we investigate environment driven gas depletion in satellite galaxies, taking full advantage of the atomic hydrogen (HI) spectral stacking technique to quantify content for entire gas-poor -rich regime. We do so using a multi-wavelength sample 10,600 selected according stellar mass (log M$_{\star}$/M$_{\odot}$ $\geq$ 9) and redshift (0.02 $\leq$ z 0.05) from Sloan Digital Sky Survey, with HI data Arecibo Legacy Fast ALFA (ALFALFA) survey. Using key HI-to-stellar scaling...
We revisit the main HI-to-stellar mass ratio (gas fraction) scaling relations, taking advantage of HI spectral stacking technique to understand dependence gas content on structural and star formation properties nearby galaxies. This work uses a volume-limited, multi-wavelength sample ~25,000 galaxies, selected according stellar (10^9 M_sol < M_* 10^11.5 M_sol) redshift (0.02 z 0.05) from Sloan Digital Sky Survey, with data Arecibo Legacy Fast ALFA survey. bin multiple parameters galaxies...
We investigate the influence of environment on cold-gas properties galaxies at z=0 within TNG100 cosmological, magnetohydrodynamic simulation, part IllustrisTNG suite. extend previous post-processing methods for breaking gas cells into their atomic and molecular phases, build detailed mocks to comprehensively compare latest surveys hydrogen (HI) in nearby galaxies, namely ALFALFA xGASS. use explore HI content, star formation activity, angular momentum satellite each as a function...
We use deep HI observations obtained as part of the extended GALEX Arecibo SDSS survey (xGASS) to study cold gas properties central galaxies across environments. find that, below stellar masses 10^10.2 Msun, in groups have an average atomic hydrogen fraction ~0.3dex higher than those isolation at same mass. At these masses, group are usually found small N=2 members. The content low mass is mirrored by their star formation activity and molecular content. larger this difference disappears...
Abstract The PHANGS survey uses Atacama Large Millimeter/submillimeter Array, Hubble Space Telescope, Very and JWST to obtain an unprecedented high-resolution view of nearby galaxies, covering millions spatially independent regions. high dimensionality such a diverse multiwavelength data set makes it challenging identify new trends, particularly when they connect observables from different wavelengths. Here, we use unsupervised machine-learning algorithms mine this information-rich novel...
Abstract We compile a sample of Sloan Digital Sky Survey (SDSS) galaxy clusters with high-quality Chandra X-ray data to directly study the influence dense intracluster medium (ICM) on quenching satellite galaxies. quenched fractions galaxies as function ICM density for low- (10 9 ≲ M ⋆ 10 ⊙ ), intermediate- 10.5 and high-mass ( ≳ ) >3000 across 24 low-redshift z < 0.1) clusters. For low-mass we find evidence broken power-law trend between fraction local density. The increases modestly...
We combine the latest spectrally stacked data of 21-cm emission from ALFALFA survey with an updated version Dark Sage semi-analytic model to investigate relative contributions secular and environmental astrophysical processes on shaping HI fractions quiescence galaxies in local Universe. calibrate match observed mean fraction all as a function stellar mass. Without consideration feedback, disc instabilities, active galactic nuclei, we show how slope normalisation this relation would change...
In this paper, we stack neutral atomic hydrogen (H i) spectra for 9720 star-forming galaxies along the mass–metallicity relation. The sample is selected according to stellar mass (109 ≤ M⋆/M⊙ 1011) and redshift (0.02 z 0.05) from overlap of Sloan Digital Sky Survey Arecibo Legacy Fast ALFA survey. We confirm quantify strong anticorrelation between H i gas-phase metallicity at fixed mass. Furthermore, show first time that relationship gas content consistent different estimators, contrary...
We present the Virgo Environment Traced in CO (VERTICO) survey, a new effort to map $^{12}$CO($2-1$), $^{13}$CO($2-1$), and C$^{18}$O($2-1$) 51 Cluster galaxies with Atacama Compact Array, part of Large Millimeter/submillimeter Array (ALMA). The primary motivation VERTICO is understand physical mechanisms that perturb molecular gas disks, therefore star formation galaxy evolution, dense environments. This first paper contains an overview VERTICO's design sample selection, $^{12}$CO($2-1$)...
In this VERTICO early science paper we explore in detail how environmental mechanisms, identified HI, affect the resolved properties of molecular gas reservoirs cluster galaxies. The is probed using ALMA ACA (+TP) observations 12CO(2-1) 51 spiral galaxies Virgo (of which 49 are detected), all included VIVA HI survey. sample spans a stellar mass range 9 < log M*/Msol 11. We study radial profiles, isodensity radii, and surface densities as function galaxy deficiency morphology. There weak...
JINGLE is a new JCMT legacy survey designed to systematically study the cold interstellar medium of galaxies in local Universe. As part we perform 850 µm continuum measurements with SCUBA-2 for representative sample 193 Herschel-selected M* > 109 M⊙, as well integrated CO(2–1) line fluxes RxA3m subset 90 these galaxies. The selected from fields covered by Herschel-ATLAS that are also targeted MaNGA optical integral-field spectroscopic survey. observations combined multiwavelength ancillary...
Abstract We present high-resolution ALMA observations of the C 18 O, 13 CO, and 12 CO J = 1–0 isotopologues in three nearby ultraluminous infrared galaxies (ULIRGS; Arp 220, IRAS 13120-5453, 17208-0014) one post-merger galaxy (NGC 2623). In all four systems, we measure high CO/C O CO/ integrated line ratios while ratio is observed to be extremely low comparison typical star-forming disks, supporting previous work. investigate whether these unusual are due dynamical effects, astrochemistry...
Abstract The quenching of cluster satellite galaxies is inextricably linked to the suppression their cold interstellar medium (ISM) by environmental mechanisms. While removal neutral atomic hydrogen (H i ) at large radii well studied, how environment impacts remaining gas in centres galaxies, which are dominated molecular gas, less clear. Using new observations from Virgo Environment traced CO survey (VERTICO) and archival H data, we study within optical discs on 1.2-kpc scales with...
The feedback from an active galactic nucleus (AGN) is frequently invoked as a mechanism through which gas can be heated or removed galaxy. However, fraction measurements in AGN hosts have yielded mixed support for this scenario. Here, we re-visit the assessment of fgas (=MHI/M*) z<0.05 Sloan Digital Sky Survey (SDSS) using two complementary techniques. First, investigate 75 host galaxies extended GALEX Arecibo SDSS (xGASS), whose atomic fractions are complete to few percent. Second,...
We measure the molecular-to-atomic gas ratio, $R_{\rm mol}$, and star formation rate (SFR) per unit molecular mass, SFE$_{\rm in 38 nearby galaxies selected from Virgo Environment Traced CO (VERTICO) survey. determine their scale-lengths for stellar components find a roughly 3:5 ratio between them compared to $\sim$1:1 field galaxies, indicating that emission is more centrally concentrated than stars. compute mol}$ as function of different physical quantities. While spatially-resolved on...
In this VERTICO science paper we aim to study how the star formation process depends on galactic environment and gravitational interactions in context of galaxy evolution. We explore scaling relation between rate (SFR) surface density molecular gas density, also known as Kennicutt-Schmidt (KS) relation, a subsample Virgo cluster spiral galaxies. use new ACA TP observations from VERTICO-ALMA Large Program at 720pc resolution resolve content, traced by 12CO(2-1) transition, across disks 37...
We present the HI eXtreme (HIX) galaxy survey targeting some of most rich galaxies in southern hemisphere. The 13 HIX have been selected to host massive discs at a given stellar luminosity. compare these control sample average detected Parkes All Sky Survey (HIPASS, Barnes et al. 2001). As is matched luminosity, we find that properties are similar sample. Furthermore, specific star formation rate and optical morphology do not differ between galaxies. find, however, be less efficient forming...
We study the dust properties of 192 nearby galaxies from JINGLE survey using photometric data in 22-850micron range. derive total mass, temperature T and emissivity index beta through fitting their spectral energy distribution (SED) a single modified black-body model (SMBB). apply hierarchical Bayesian approach that reduces known degeneracy between beta. Applying approach, strength T-beta anti-correlation is reduced Pearson correlation coefficient R=-0.79 to R=-0.52. For we measure...
We analyze cold-gas distributions in Virgo cluster galaxies using resolved CO(2-1) (tracing molecular hydrogen, H2) and HI observations from the Environment Traced In CO (VERTICO) VLA Imaging of Atomic Gas (VIVA) surveys. From a theoretical perspective, it is expected that environmental processes clusters will have stronger influence on diffuse atomic gas compared to relatively dense component, these perturbations can compress cold interstellar medium leading elevated star formation. this...
Abstract We study how environment regulates the star formation cycle of 33 Virgo Cluster satellite galaxies on 720 pc scales. present resolved star-forming main sequence for cluster galaxies, dividing sample based their global H i properties and comparing to a control field galaxies. –poor have reduced rate (SFR) surface densities with respect both –normal (∼0.5 dex), suggesting that mechanisms regulating content are responsible quenching local formation. demonstrate observed in is caused by...
Abstract Galaxy interactions are often accompanied by an enhanced star formation rate (SFR). Since molecular gas is essential for formation, it vital to establish whether and how much galaxy affect the properties. We investigate effect of on global properties studying a sample 58 galaxies in pairs 154 control galaxies. Molecular determined from observations with JCMT, PMO, CSO telescopes supplemented data xCOLD GASS JINGLE surveys at 12 CO(1–0) CO(2–1). The SFR, mass ( <?CDATA...
Abstract We present CO ( J = 1−0) and/or 2−1) spectroscopy for 31 galaxies selected from the ongoing Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, obtained with multiple telescopes. This sample is combined observations literature to study correlation of luminosities <?CDATA ${L}_{\mathrm{CO}(1-0)}$?> ) mid-infrared 12 ${L}_{12\mu {\rm{m}}}$?> and 22 μ m ${L}_{22\mu ), as well dependence residuals on a variety galaxy properties. The tighter more linear, but relatively...
ABSTRACT Stellar feedback-driven outflows are important regulators of the gas–star formation cycle. However, resolving outflow physics requires high-resolution observations that can only be achieved in very nearby galaxies, making suitable targets rare. We present first results from new VLT/MUSE large programme MAUVE (MUSE and ALMA Unveiling Virgo Environment), which aims to understand cycle within context cluster environment. Outflows a key part this cycle, we focus on peculiar galaxy NGC...
Abstract It has been shown in previous publications that the TNG100 simulation quantitatively reproduces observed reduction each of total atomic and molecular hydrogen gas for galaxies within massive halos, i.e., dense environments. In this Letter, we study how well TNG50 resolved effects a Virgo-like cluster environment on surface densities satellite with m * > 10 9 M ⊙ star formation rate 0.05 yr −1 . We select are analogous to those HERACLES VERTICO surveys mock-observe them common...
The quenching of cluster satellite galaxies is inextricably linked to the suppression their cold interstellar medium (ISM) by environmental mechanisms. While removal neutral atomic hydrogen (HI) at large radii well studied, how environment impacts remaining gas in centres galaxies, which are dominated molecular gas, less clear. Using new observations from Virgo Environment traced CO survey (VERTICO) and archival HI data, we study within optical discs on 1.2-kpc scales with spatially resolved...