Adam K. Leroy
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View article: Resolved Profiles of Stellar Mass, Star Formation Rate, and Predicted CO-to-H <sub>2</sub> Conversion Factor Across Thousands of Local Galaxies
Resolved Profiles of Stellar Mass, Star Formation Rate, and Predicted CO-to-H <sub>2</sub> Conversion Factor Across Thousands of Local Galaxies Open
We present radial profiles of surface brightness in UV and IR bands, estimate stellar mass surface density (Σ ⋆ ) and star formation rate surface density (Σ SFR ), and predict the CO-to-H 2 conversion factor ( α CO ) for over 5000 local ga…
View article: PAH Marks the Spot: Digging for Buried Clusters in Nearby Star-forming Galaxies
PAH Marks the Spot: Digging for Buried Clusters in Nearby Star-forming Galaxies Open
The joint capabilities of the Hubble Space Telescope (HST) and JWST allow for an unparalleled look at the early lives of star clusters at near- and mid-infrared wavelengths. We present here a multiband analysis of embedded young stellar cl…
View article: The Hierarchical Dynamical State of Molecular Gas from 3 to 300 pc in NGC 253
The Hierarchical Dynamical State of Molecular Gas from 3 to 300 pc in NGC 253 Open
Understanding how the dynamical state of the interstellar medium (ISM) changes across spatial scales can provide important insights into how the gas is organized and ultimately collapses to form stars. To this end, we present ALMA 12 CO(2–…
View article: Masses, Star Formation Efficiencies, and Dynamical Evolution of 18,000 H <scp>ii</scp> Regions
Masses, Star Formation Efficiencies, and Dynamical Evolution of 18,000 H <span>ii</span> Regions Open
We present measurements of the masses associated with ∼18,000 H ii regions across 19 nearby star-forming galaxies by combining data from JWST, Hubble Space Telescope, MUSE, Atacama Large Millimeter/submillimeter Array, Very Large Arra…
View article: Polycyclic aromatic hydrocarbon destruction in star-forming regions across 42 nearby galaxies
Polycyclic aromatic hydrocarbon destruction in star-forming regions across 42 nearby galaxies Open
Polycyclic aromatic hydrocarbons (PAHs) are widespread in the interstellar medium (ISM) of near solar metallicity galaxies, where they play a critical role in ISM heating, cooling, and reprocessing stellar radiation. The PAH fraction, the …
View article: Characterization of Two Cool Galaxy Outflow Candidates Using Mid-infrared Emission from Polycyclic Aromatic Hydrocarbons
Characterization of Two Cool Galaxy Outflow Candidates Using Mid-infrared Emission from Polycyclic Aromatic Hydrocarbons Open
We characterize two candidate cool galactic outflows in two relatively low-mass, highly inclined Virgo cluster galaxies: NGC 4424 and NGC 4694. Previous analyses of observations using the Atacama Large Millimeter/submillimeter Array carbon…
View article: Stars Born in the Wind: M82’s Outflow and Halo Star Formation
Stars Born in the Wind: M82’s Outflow and Halo Star Formation Open
Starburst galaxies, such as M82, launch kiloparsec-scale galactic outflows that interact with the circumgalactic medium (CGM) in complex ways. Apart from enriching the CGM with metals and energy, these outflows may trigger star formation i…
View article: Masses, Star-Formation Efficiencies, and Dynamical Evolution of 18,000 HII Regions
Masses, Star-Formation Efficiencies, and Dynamical Evolution of 18,000 HII Regions Open
We present measurements of the masses associated with $\sim18,000$ HII regions across 19 nearby star-forming galaxies by combining data from JWST, HST, MUSE, ALMA, VLA, and MeerKAT from the multi-wavelength PHANGS survey. We report 10 pc-s…
View article: The Hidden Life of Stars: Embedded Beginnings to AGB Endings in the PHANGS-JWST Sample. I. Catalog of Mid-IR Sources
The Hidden Life of Stars: Embedded Beginnings to AGB Endings in the PHANGS-JWST Sample. I. Catalog of Mid-IR Sources Open
We present a multiwavelength catalog of mid-infrared-selected compact sources in 19 nearby galaxies, combining JWST NIRCam/MIRI, HST UV-optical broadband, H$α$ narrow-band, and ALMA CO observations. We detect 24,945 compact sources at 21 $…
View article: Polycyclic aromatic hydrocarbons destruction in star-forming regions across 42 nearby galaxies
Polycyclic aromatic hydrocarbons destruction in star-forming regions across 42 nearby galaxies Open
Polycyclic aromatic hydrocarbons (PAHs) are widespread in the interstellar medium (ISM) of Solar metallicity galaxies, where they play a critical role in ISM heating, cooling, and reprocessing stellar radiation. The PAH fraction, the abund…
View article: Characterization of Two Cool Galaxy Outflow Candidates Using Mid-Infrared Emission from Polycyclic Aromatic Hydrocarbons
Characterization of Two Cool Galaxy Outflow Candidates Using Mid-Infrared Emission from Polycyclic Aromatic Hydrocarbons Open
We characterize two candidate cool galactic outflows in two relatively low mass, highly inclined Virgo cluster galaxies: NGC4424 and NGC4694. Previous analyses of observations using the Atacama Large Millimeter Array (ALMA) carbon monoxide…
View article: Erratum: “The RESOLVE Survey Atomic Gas Census and Environmental Influences on Galaxy Gas Reservoirs” (2016, ApJ, 832, 126)
Erratum: “The RESOLVE Survey Atomic Gas Census and Environmental Influences on Galaxy Gas Reservoirs” (2016, ApJ, 832, 126) Open
Erratum to: “The RESOLVE Survey Atomic Gas Census and Environmental Influences on Galaxy Gas Reservoirs”
View article: Azimuthal offsets in spiral arms of nearby galaxies
Azimuthal offsets in spiral arms of nearby galaxies Open
Spiral arms play a central role in disc galaxies, but their dynamical nature remains a long-standing open question. Azimuthal offsets between molecular gas and star formation are expected if gas crosses spiral arms, as predicted by quasi-s…
View article: A First Look at Spatially Resolved Infrared Supernova Remnants in M33 with JWST
A First Look at Spatially Resolved Infrared Supernova Remnants in M33 with JWST Open
We present the first spatially resolved infrared images of supernova remnants (SNRs) in M33 with the unprecedented sensitivity and resolution of JWST. We analyze 40 SNRs in four JWST fields: two covering central and southern M33 with separ…
View article: Observational Constraints on Cool Gas Clouds in M82’s Starburst-driven Outflow
Observational Constraints on Cool Gas Clouds in M82’s Starburst-driven Outflow Open
Star formation feedback can drive large-scale, multiphase galactic outflows. The dynamical and thermodynamical interaction between the hot and cooler phases is a prime focus of both observational and theoretical work. Here, we analyze H α …
View article: Modeling the Mass Distribution and Gravitational Potential of Nearby Disk Galaxies: Implications for the Interstellar Medium Dynamical Equilibrium
Modeling the Mass Distribution and Gravitational Potential of Nearby Disk Galaxies: Implications for the Interstellar Medium Dynamical Equilibrium Open
We characterize stellar, gas, and dark matter mass distributions for 17 nearby massive disk galaxies from the PHANGS sample. This allows us to compute the gravitational potential that vertically confines the interstellar gas and determines…
View article: Constraining Resolved Extragalactic <i>R</i> <sub>21</sub> Variation with Well-calibrated ALMA Observations
Constraining Resolved Extragalactic <i>R</i> <sub>21</sub> Variation with Well-calibrated ALMA Observations Open
CO(1–0) and CO(2–1) are commonly used as bulk molecular gas tracers. The CO line ratios (especially CO(2–1)/CO(1–0)– R 21 ) vary within and among galaxies, yet previous studies on R 21 and alike often rely on measurements constructed by co…
View article: The Karl G. Jansky Very Large Array Local Group <i>L</i>-Band Survey (LGLBS)
The Karl G. Jansky Very Large Array Local Group <i>L</i>-Band Survey (LGLBS) Open
We present the Local Group L -Band Survey, a Karl G. Jansky Very Large Array (VLA) survey producing the highest-quality 21 cm and 1–2 GHz radio continuum images to date, for the six VLA-accessible, star-forming, Local Group galaxies. Lever…
View article: The EDGE-CALIFA Survey: An integral field unit-based integrated molecular gas database for galaxy evolution studies in the Local Universe
The EDGE-CALIFA Survey: An integral field unit-based integrated molecular gas database for galaxy evolution studies in the Local Universe Open
Studying galaxy evolution requires knowledge not only of the stellar properties, but also of the interstellar medium (in particular the molecular phase) out of which stars form, using a statistically significant and unbiased sample of gala…
View article: Reconciling extragalactic star formation efficiencies with theory: Insights from PHANGS
Reconciling extragalactic star formation efficiencies with theory: Insights from PHANGS Open
New extragalactic measurements of the cloud population-averaged star formation efficiency per free-fall time, ϵ ff , from PHANGS show little sign of a theoretically predicted dependence on the gas virial level and weak variation with cloud…
View article: The MUSE view of the Sculptor galaxy: Survey overview and the luminosity function of planetary nebulae
The MUSE view of the Sculptor galaxy: Survey overview and the luminosity function of planetary nebulae Open
The Sculptor galaxy, NGC 253, is the southern massive star-forming disk galaxy that is closest to the Milky Way. We present a new 103-pointing MUSE mosaic of this galaxy that covers most of its star-forming disk up to 0.75 × R 25 . With an…
View article: Duration and properties of the embedded phase of star formation in 37 nearby galaxies from PHANGS-JWST
Duration and properties of the embedded phase of star formation in 37 nearby galaxies from PHANGS-JWST Open
Light reprocessed by dust grains emitting in the infrared allows the study of the physics at play in dusty, embedded regions, where ultraviolet and optical wavelengths are attenuated. Infrared telescopes such as JWST have made it possible …
View article: Physical Conditions of the Ionized Superwind in NGC 253 with VLT/MUSE
Physical Conditions of the Ionized Superwind in NGC 253 with VLT/MUSE Open
We present an analysis of the H α -emitting ionized gas in the warm phase of the NGC 253 outflow using integral field spectroscopy from the Multi Unit Spectroscopic Explorer. In each spaxel, we decompose H α , [N ii ], and [S ii ] emission…
View article: The EDGE-CALIFA Survey: An integral field unit-based integrated molecular gas database for galaxy evolution studies in the Local Universe
The EDGE-CALIFA Survey: An integral field unit-based integrated molecular gas database for galaxy evolution studies in the Local Universe Open
Studying galaxy evolution requires knowledge not only of the stellar properties, but also of the interstellar medium (in particular the molecular phase) out of which stars form, using a statistically significant and unbiased sample of gala…
View article: Relationships between Polycyclic Aromatic Hydrocarbons, Small Dust Grains, H<sub>2</sub>, and H <scp>i</scp> in Local Group Dwarf Galaxies NGC 6822 and WLM Using JWST, ALMA, and the VLA
Relationships between Polycyclic Aromatic Hydrocarbons, Small Dust Grains, H<sub>2</sub>, and H <span>i</span> in Local Group Dwarf Galaxies NGC 6822 and WLM Using JWST, ALMA, and the VLA Open
We present 0.6–3.2 pc resolution mid-infrared (MIR) JWST images at 7.7 μ m (F770W) and 21 μ m (F2100W) covering the main star-forming regions of two of the closest star-forming low-metallicity dwarf galaxies, NGC 6822 and Wolf–Lundmark–Mel…
View article: Time-scales of polycyclic aromatic hydrocarbon and dust continuum emission from gas clouds compared to molecular gas cloud lifetimes in PHANGS-JWST galaxies
Time-scales of polycyclic aromatic hydrocarbon and dust continuum emission from gas clouds compared to molecular gas cloud lifetimes in PHANGS-JWST galaxies Open
Recent JWST mid-infrared (mid-IR) images, tracing polycyclic aromatic hydrocarbons (PAHs) and dust continuum emission, provide detailed views of the interstellar medium (ISM) in nearby galaxies. Leveraging PHANGS-JWST Cycle 1 and PHANGS-MU…
View article: Constraining resolved extragalactic $R_{21}$ variation with well calibrated ALMA observations
Constraining resolved extragalactic $R_{21}$ variation with well calibrated ALMA observations Open
CO(1-0) and CO(2-1) are commonly used as bulk molecular gas tracers. The CO line ratios (especially CO(2-1)/CO(1-0) - $R_{21}$) vary within and among galaxies, yet previous studies on $R_{21}$ and alike often rely on measurements construct…
View article: An Investigation of Disk Thickness in M51 from H<i>α</i>, Pa<i>α</i>, and Mid-infrared Power Spectra
An Investigation of Disk Thickness in M51 from H<i>α</i>, Pa<i>α</i>, and Mid-infrared Power Spectra Open
Power spectra (PS) of high-resolution images of M51 (NGC 5194) taken with the Hubble Space Telescope and the James Webb Space Telescope (JWST) have been examined for evidence of disk thickness in the form of a change in slope between large…
View article: Cloud-scale Gas Properties, Depletion Times, and Star Formation Efficiency per Freefall Time in PHANGS–ALMA
Cloud-scale Gas Properties, Depletion Times, and Star Formation Efficiency per Freefall Time in PHANGS–ALMA Open
We compare measurements of star formation efficiency to cloud-scale gas properties across the PHANGS– ALMA sample. Dividing 67 galaxies into 1.5 kpc scale regions, we calculate the molecular gas depletion time and the s…