Isaac Laseter
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View article: DeepDISC photo-z catalog for JADES DR2 GOODS-S
DeepDISC photo-z catalog for JADES DR2 GOODS-S Open
README This file contains a photometric redshift catalog for all objects in the JADES DR2 GOODS-S sample. Photo-zs were derived using deep learning framework DeepDISC. Associated paper here. Abstract: Photo-z algorithms that utilize SED te…
View article: MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies
MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies Open
Now detected out to redshifts of $z\sim 14.5$, the rest-frame ultraviolet and optical spectra of galaxies encode numerous physical properties of the interstellar medium (ISM). Accurately extracting these properties from spectra remains a k…
View article: MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon
MEGATRON: the impact of non-equilibrium effects and local radiation fields on the circumgalactic medium at cosmic noon Open
We present three cosmological radiation-hydrodynamic zoom simulations of the progenitor of a Milky Way-mass galaxy from the MEGATRON suite. The simulations combine on-the-fly radiative transfer with a detailed non-equilibrium thermochemica…
View article: MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations
MEGATRON: Reproducing the Diversity of High-Redshift Galaxy Spectra with Cosmological Radiation Hydrodynamics Simulations Open
We present the MEGATRON suite of cosmological radiation hydrodynamics simulations following the formation of Milky Way-mass galaxies from the earliest cosmic epochs when Population III stars form to Cosmic Noon. The suite represents the fi…
View article: MEGATRON: how the first stars create an iron metallicity plateau in the smallest dwarf galaxies
MEGATRON: how the first stars create an iron metallicity plateau in the smallest dwarf galaxies Open
We study the stellar mass-iron metallicity relation of dwarf galaxies in the new high-resolution MEGATRON cosmological radiation-hydrodynamics simulations. These simulations model galaxy formation up to $z\approx8$ in a region that will co…
View article: Efficient Ionizers with Low H$\boldsymbolβ$+[OIII] Equivalent Widths: JADES Spectroscopy of a Peculiar High-z Population
Efficient Ionizers with Low H$\boldsymbolβ$+[OIII] Equivalent Widths: JADES Spectroscopy of a Peculiar High-z Population Open
Early JWST photometric studies discovered a population of UV faint ($\rm 700$Å) exclude the most metal-poor efficient ionizers and favor 1) more chemically enriched systems with comparable extreme radiation fields and 2) older starbursting…
View article: Hitting the slopes: A spectroscopic view of UV continuum slopes of galaxies reveals a reddening at z > 9.5
Hitting the slopes: A spectroscopic view of UV continuum slopes of galaxies reveals a reddening at z > 9.5 Open
The UV continuum slope of galaxies, $β$, is a powerful diagnostic. Understanding the redshift evolution of $β$ and its dependence on key galaxy properties can shed light on the evolution of galaxy physical properties over cosmic time. In t…
View article: Ionizing properties of galaxies in JADES for a stellar mass complete sample: resolving the cosmic ionizing photon budget crisis at the Epoch of Reionization
Ionizing properties of galaxies in JADES for a stellar mass complete sample: resolving the cosmic ionizing photon budget crisis at the Epoch of Reionization Open
We use NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) to study the ionizing properties of a sample of 14 652 galaxies at $3 \le z_{\rm {phot}} \le 9$, 90 per cent complete in stellar mass down to log(M$_{\star }$/[…
View article: JADES: primaeval Lyman α emitting galaxies reveal early sites of reionization out to redshift <i>z</i> ~ 9
JADES: primaeval Lyman α emitting galaxies reveal early sites of reionization out to redshift <i>z</i> ~ 9 Open
Given the sensitivity of the resonant Lyman $\alpha$ (Ly $\alpha $) transition to absorption by neutral hydrogen, observations of Ly $\alpha$ emitting galaxies (LAEs) have been widely used to probe the ionizing capabilities of reionization…
View article: Extreme emission line galaxies detected in JADES <i>JWST</i>/NIRSpec – I. Inferred galaxy properties
Extreme emission line galaxies detected in JADES <i>JWST</i>/NIRSpec – I. Inferred galaxy properties Open
Extreme emission line galaxies (EELGs) exhibit large equivalent widths (EW) in their rest-optical emission lines ([O iii]$\lambda 5007$ or H $\alpha$ rest-frame EW$\gt 750$ Å) which can be tied to a recent upturn in star formation rate (SF…
View article: JADES NIRSpec initial data release for the <i>Hubble</i> Ultra Deep Field
JADES NIRSpec initial data release for the <i>Hubble</i> Ultra Deep Field Open
We describe the NIRSpec component of the JWST Deep Extragalactic Survey (JADES), and provide deep spectroscopy of 253 sources targeted with the NIRSpec micro-shutter assembly in the Hubble Ultra Deep Field and surrounding GOODS-South. The …
View article: The NIRSpec Wide GTO Survey
The NIRSpec Wide GTO Survey Open
The Near-infrared Spectrograph (NIRSpec) on the James Webb Space Telescope is uniquely suited to studying galaxies in the distant Universe with its combination of multi-object capabilities and sensitivity over a large range in wavelength (…
View article: JADES: Insights into the low-mass end of the mass–metallicity–SFR relation at 3 < <i>z</i> < 10 from deep JWST/NIRSpec spectroscopy
JADES: Insights into the low-mass end of the mass–metallicity–SFR relation at 3 < <i>z</i> < 10 from deep JWST/NIRSpec spectroscopy Open
We analysed the gas-phase metallicity properties of a sample of low-stellar-mass (log M ⋆ / M ⊙ ≲ 9) galaxies at 3 < z < 10 observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with m…
View article: Extreme emission line galaxies detected in JADES JWST/NIRSpec I: inferred galaxy properties
Extreme emission line galaxies detected in JADES JWST/NIRSpec I: inferred galaxy properties Open
Extreme emission line galaxies (EELGs) exhibit large equivalent widths (EW) in their rest-optical emission lines ([OIII]$\lambda5007$ or H$α$ rest-frame EW$ > 750Å$) which can be tied to a recent upturn in star formation rate, due to the s…
View article: JADES: Detecting [OIII]<i>λ</i>4363 emitters and testing strong line calibrations in the high-<i>z</i> Universe with ultra-deep JWST/NIRSpec spectroscopy up to <i>z</i> ∼ 9.5
JADES: Detecting [OIII]<i>λ</i>4363 emitters and testing strong line calibrations in the high-<i>z</i> Universe with ultra-deep JWST/NIRSpec spectroscopy up to <i>z</i> ∼ 9.5 Open
We present ten novel [OIII] λ 4363 auroral line detections up to z ∼ 9.5 measured from ultra-deep JWST/NIRSpec MSA spectroscopy from the JWST Advanced Deep Extragalactic Survey (JADES). We leverage the deepest spectroscopic observations ta…
View article: Introducing the Texas Euclid Survey for Lyα (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyα Emission
Introducing the Texas Euclid Survey for Lyα (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyα Emission Open
We present the Texas Euclid Survey for Ly α (TESLA), a spectroscopic survey in the 10 deg 2 of the Euclid North Ecliptic Pole (NEP) field. Using TESLA, we study how the physical properties of Ly α emitters (LAEs) correlate with Ly α emissi…
View article: JADES: Detecting [OIII]$λ4363$ Emitters and Testing Strong Line Calibrations in the High-$z$ Universe with Ultra-deep JWST/NIRSpec Spectroscopy up to $z \sim 9.5$
JADES: Detecting [OIII]$λ4363$ Emitters and Testing Strong Line Calibrations in the High-$z$ Universe with Ultra-deep JWST/NIRSpec Spectroscopy up to $z \sim 9.5$ Open
We present 10 novel [OIII]$λ4363$ auroral line detections up to $z\sim 9.5$ measured from ultra-deep JWST/NIRSpec MSA spectroscopy from the JWST Advanced Deep Extragalactic Survey (JADES). We leverage the deepest spectroscopic observations…
View article: JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy
JADES NIRSpec Initial Data Release for the Hubble Ultra Deep Field: Redshifts and Line Fluxes of Distant Galaxies from the Deepest JWST Cycle 1 NIRSpec Multi-Object Spectroscopy Open
We describe the NIRSpec component of the JWST Deep Extragalactic Survey (JADES), and provide deep spectroscopy of 253 sources targeted with the NIRSpec micro-shutter assembly in the Hubble Ultra Deep Field and surrounding GOODS-South. The …
View article: Overview of the JWST Advanced Deep Extragalactic Survey (JADES)
Overview of the JWST Advanced Deep Extragalactic Survey (JADES) Open
We present an overview of the James Webb Space Telescope (JWST) Advanced Deep Extragalactic Survey (JADES), an ambitious program of infrared imaging and spectroscopy in the GOODS-S and GOODS-N deep fields, designed to study galaxy evolutio…
View article: JADES: Insights on the low-mass end of the mass--metallicity--star-formation rate relation at $3 < z < 10$ from deep JWST/NIRSpec spectroscopy
JADES: Insights on the low-mass end of the mass--metallicity--star-formation rate relation at $3 < z < 10$ from deep JWST/NIRSpec spectroscopy Open
We analyse the gas-phase metallicity properties of a sample of low stellar mass (log M*/M_sun <= 9) galaxies at 3 < z < 10, observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with m…
View article: Introducing the Texas Euclid Survey for Lyman Alpha (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyman-Alpha Emission
Introducing the Texas Euclid Survey for Lyman Alpha (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyman-Alpha Emission Open
We present the Texas Euclid Survey for Lyman-Alpha (TESLA), a spectroscopic survey in the 10 square degree of the Euclid North Ecliptic Pole (NEP) field. Using TESLA, we study how the physical properties of Lyman-alpha emitters (LAEs) corr…
View article: A Search for Lensed Lyα Emitters within the Early HETDEX Data Set
A Search for Lensed Lyα Emitters within the Early HETDEX Data Set Open
The Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) is a large-volume spectroscopic survey without preselection of sources, searching ∼540 deg 2 for Ly α emitting galaxies (LAEs) at 1.9 < z < 3.5. Taking advantage of such a wide-vol…
View article: A Search for Lensed Lyman-Alpha Emitters within the Early HETDEX Data Set
A Search for Lensed Lyman-Alpha Emitters within the Early HETDEX Data Set Open
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is a large-volume spectroscopic survey without pre-selection of sources, searching ~ 540 deg^2 for Lyman-alpha emitting galaxies (LAEs) at 1.9 < z < 3.5. Taking advantage of such a…
View article: The chemical enrichment in the early Universe as probed by <i>JWST</i> via direct metallicity measurements at <i>z</i> ∼ 8
The chemical enrichment in the early Universe as probed by <i>JWST</i> via direct metallicity measurements at <i>z</i> ∼ 8 Open
We analyse the chemical properties of three z∼ 8 galaxies behind the galaxy cluster SMACS J0723.3-7327, observed as part of the Early Release Observations programme of the James Webb Space Telescope. Exploiting [O iii]λ4363 auroral line de…
View article: Properties of the Lowest-metallicity Galaxies over the Redshift Range z = 0.2 to z = 1
Properties of the Lowest-metallicity Galaxies over the Redshift Range z = 0.2 to z = 1 Open
Low-metallicity galaxies may provide key insights into the evolutionary history of galaxies. Galaxies with strong emission lines and high equivalent widths (rest-frame EW(H β ) ≳ 30 Å) are ideal candidates for the lowest-metallicity galaxi…
View article: The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8
The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8 Open
Reduced and flux calibrated JWST/NIRSpec 1D spectra for the three sources (ID_4590 at z=8.4953, ID_6355 at z=7.6643 and ID_10612 at z=7.6592) analysed in Curti et al., 2022, "The chemical enrichment in the early Universe as probed by JWST …
View article: The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8
The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8 Open
Reduced and flux calibrated JWST/NIRSpec 1D spectra for the three sources (ID_4590 at z=8.4953, ID_6355 at z=7.6643 and ID_10612 at z=7.6592) analysed in Curti et al., 2022, "The chemical enrichment in the early Universe as probed by JWST …
View article: Properties of the Lowest Metallicity Galaxies Over the Redshift Range z = 0.2 to z = 1
Properties of the Lowest Metallicity Galaxies Over the Redshift Range z = 0.2 to z = 1 Open
Low-metallicity galaxies may provide key insights into the evolutionary history of galaxies. Galaxies with strong emission lines and high equivalent widths (rest-frame EW(H-beta) > 30 A) are ideal candidates for the lowest metallicity gala…