Sophia R. Flury
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View article: Power-law Emission-line Wings and Radiation-driven Superwinds in Local Lyman Continuum Emitters
Power-law Emission-line Wings and Radiation-driven Superwinds in Local Lyman Continuum Emitters Open
We investigate broad emission-line wings, reaching ≤800 km s −1 , observed in 26 galaxies with Lyman continuum (LyC) observations, primarily from the Low-redshift Lyman Continuum Survey. Using Magellan/MIKE, Very Large Telescope/X-shooter,…
View article: The <i>JWST</i> Emission Line Survey (JELS): the sizes and merger fraction of star-forming galaxies during the Epoch of Reionization
The <i>JWST</i> Emission Line Survey (JELS): the sizes and merger fraction of star-forming galaxies during the Epoch of Reionization Open
We used observations from the JWST Emission Line Survey (JELS) to measure the half-light radii ($r_{e}$) of 23 H$\alpha$-emitting star-forming (SF) galaxies at $z=6.1$ in the PRIMER/COSMOS field. Galaxy sizes were measured in JWST near-inf…
View article: Lyman Continuum Leakage from Massive Leaky Starbursts: A Different Class of Emitters?
Lyman Continuum Leakage from Massive Leaky Starbursts: A Different Class of Emitters? Open
The origin of Lyman continuum (LyC) photons responsible for reionizing the Universe remains largely unknown, with the fraction of escaping LyC photons from galaxies at z ∼ 6 to 12 still uncertain. Direct detection of LyC photons from this …
View article: CLASSY XII: nitrogen enrichment shaped by gas density and feedback
CLASSY XII: nitrogen enrichment shaped by gas density and feedback Open
We investigate the chemical evolution of N/O using a sample of 45 local star-forming galaxies from the CLASSY survey. This sample spans a wide range of galaxy properties, with robust determinations of nitrogen and oxygen abundances via the…
View article: Feedback and dynamical masses in high- <i>z</i> galaxies: the advent of high-resolution NIRSpec spectroscopy
Feedback and dynamical masses in high- <i>z</i> galaxies: the advent of high-resolution NIRSpec spectroscopy Open
Stellar feedback is an essential step in the baryon cycle of galaxies, but it remains unconstrained beyond Cosmic Noon. We study the dynamical mass and gas-flow properties of a sample of 16 sub-$L^{\star }$ star-forming galaxies at $4\le z…
View article: New ionization models and the shocking nitrogen excess at <i>z</i> &gt; 5
New ionization models and the shocking nitrogen excess at <i>z</i> > 5 Open
The new era of galaxy evolution studies hearkened in by James Webb Space Telescope has led to the discovery of $z>5$ galaxies exhibiting excess nitrogen with $\rm \log (N/O)$$\sim$1 dex or more than expected from $\rm \log (N/O)$–$\rm 1…
View article: The Ly$α$ and Continuum Origins Survey. III. Investigating the link between galaxy morphology, merger properties and LyC escape
The Ly$α$ and Continuum Origins Survey. III. Investigating the link between galaxy morphology, merger properties and LyC escape Open
Characterizing the mechanisms and galaxy properties conducive to the emission and escape of ionizing (LyC) emission is necessary to accurately model the Epoch of Reionization, and identify the sources that powered it. The Lyman-alpha and C…
View article: The Ly<i>α</i> and Continuum Origins Survey. I. Survey Description and Ly<i>α</i> Imaging
The Ly<i>α</i> and Continuum Origins Survey. I. Survey Description and Ly<i>α</i> Imaging Open
Understanding the mechanisms driving the escape of ionizing or Lyman continuum (LyC) emission from the interstellar medium of galaxies is necessary to constrain the evolution of reionization and the sources responsible for it. While progre…
View article: Strength in Numbers: Red Galaxies Bolster the Cosmic Star Formation Rate Density at z > 3
Strength in Numbers: Red Galaxies Bolster the Cosmic Star Formation Rate Density at z > 3 Open
A comprehensive account of the cosmic star-formation history demands an accurate census of dust-enshrouded star formation over cosmic time. We provide strong new constraints from a large sample of 777 red galaxies, selected based on their …
View article: The <i>JWST</i> Emission-Line Survey: extending rest-optical narrow-band emission-line selection into the Epoch of Reionization
The <i>JWST</i> Emission-Line Survey: extending rest-optical narrow-band emission-line selection into the Epoch of Reionization Open
We present the JWST Emission-Line Survey (JELS), a JWST imaging programme exploiting the wavelength coverage and sensitivity of the Near-Infrared Camera (NIRCam) to extend narrow-band rest-optical emission-line selection into the Epoch of …
View article: The <i>JWST</i> Emission Line Survey (JELS): an untargeted search for H α emission line galaxies at <i>z</i> &gt; 6 and their physical properties
The <i>JWST</i> Emission Line Survey (JELS): an untargeted search for H α emission line galaxies at <i>z</i> > 6 and their physical properties Open
We present the first results of the JWST Emission Line Survey (JELS). Utilizing the first NIRCam narrow-band imaging at 4.7 $\mu$m, over 63 arcmin$^{2}$ in the PRIMER/COSMOS field, we have identified 609 emission line galaxy candidates. Fr…
View article: Generalized <i>T</i> <sub>e</sub>([O <scp>iii</scp>])–<i>T</i> <sub>e</sub>(He <scp>i</scp>) Discrepancies in Ionized Nebulae: Possible Evidence of Case B Deviations and Temperature Inhomogeneities
Generalized <i>T</i> <sub>e</sub>([O <span>iii</span>])–<i>T</i> <sub>e</sub>(He <span>i</span>) Discrepancies in Ionized Nebulae: Possible Evidence of Case B Deviations and Temperature Inhomogeneities Open
The physics of recombination lines in the He i singlet system is expected to be relatively simple, supported by accurate atomic models. We examine the intensities of He i singlets λ 3614, λ 3965, λ 5016, λ 6678, and λ 7281 and the triplet …
View article: The Low-redshift Lyman Continuum Survey: The Roles of Stellar Feedback and Interstellar Medium Geometry in LyC Escape
The Low-redshift Lyman Continuum Survey: The Roles of Stellar Feedback and Interstellar Medium Geometry in LyC Escape Open
One of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond z ∼ 6. Many studies have focused on Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) observa…
View article: A negligible contribution of two luminous <i>z</i> ∼ 7.5 galaxies to the ionizing photon budget of reionization
A negligible contribution of two luminous <i>z</i> ∼ 7.5 galaxies to the ionizing photon budget of reionization Open
We present indirect constraints on the absolute escape fraction of ionizing photons ($f_{\rm esc}^{\rm LyC}$) of the system GN 42912 which comprises two luminous ($M_{\rm UV}$ magnitudes of $-20.89$ and $-20.37$) galaxies at $z\sim 7.5$, G…
View article: The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies
The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies Open
Feedback is widely recognized as an essential condition for Lyman continuum (LyC) escape in star-forming galaxies. However, the mechanisms by which galactic outflows clear neutral gas and dust remain unclear. In this paper, we model the Mg…
View article: A Simulated Galaxy Laboratory: Exploring the Observational Effects on UV Spectral Absorption Line Measurements
A Simulated Galaxy Laboratory: Exploring the Observational Effects on UV Spectral Absorption Line Measurements Open
Ultraviolet absorption line spectroscopy is a sensitive diagnostic for the properties of interstellar and circumgalactic gas. Down-the-barrel observations, where the absorption is measured against the galaxy itself, are commonly used to st…
View article: New Ionization Models and the Shocking Nitrogen Excess at z > 5
New Ionization Models and the Shocking Nitrogen Excess at z > 5 Open
The new era of galaxy evolution studies hearkened in by JWST has led to the discovery of z > 5 galaxies exhibiting excess nitrogen with log(N/O)~1 dex or more than expected from log(N/O) vs 12+log(O/H) trends in the local Universe. A varie…
View article: A Simulated Galaxy Laboratory: Exploring the Observational Effects on UV Spectral Absorption Line Measurements
A Simulated Galaxy Laboratory: Exploring the Observational Effects on UV Spectral Absorption Line Measurements Open
Ultraviolet absorption line spectroscopy is a sensitive diagnostic for the properties of interstellar and circumgalactic gas. Down-the-barrel observations, where the absorption is measured against the galaxy itself, are commonly used to st…
View article: Erratum: “The Low-redshift Lyman Continuum Survey. I. New, Diverse Local Lyman Continuum Emitters” (2022, ApJS, 260, 1)
Erratum: “The Low-redshift Lyman Continuum Survey. I. New, Diverse Local Lyman Continuum Emitters” (2022, ApJS, 260, 1) Open
International audience
View article: Lyman Continuum leakage from massive leaky starbursts: A different class of emitters?
Lyman Continuum leakage from massive leaky starbursts: A different class of emitters? Open
The origin of Lyman Continuum (LyC) photons responsible for reionizing the universe remains a mystery, with the fraction of escaping LyC photons from galaxies at z$\sim$ 6 to 12 being highly uncertain. While direct detection of LyC photons…
View article: Direct estimates of nitrogen abundance for Seyfert 2 nuclei
Direct estimates of nitrogen abundance for Seyfert 2 nuclei Open
We derive the nitrogen and oxygen abundances in the narrow line regions (NLRs) of a sample of 38 local ($z \: \lt \: 0.4$) Seyfert 2 nuclei. For that, we consider narrow optical emission line intensities and direct estimates of the electro…
View article: The JWST-PRIMAL archival survey
The JWST-PRIMAL archival survey Open
Context. One of the surprising early findings with JWST has been the discovery of a strong “roll-over” or a softening of the absorption edge of Ly α in a large number of galaxies at z ≳ 6, in addition to systematic offsets from photometric…
View article: Multivariate Predictors of Lyman Continuum Escape. II. Predicting Lyman Continuum Escape Fractions for High-redshift Galaxies*
Multivariate Predictors of Lyman Continuum Escape. II. Predicting Lyman Continuum Escape Fractions for High-redshift Galaxies* Open
JWST is uncovering the properties of ever-increasing numbers of galaxies at z > 6, during the epoch of reionization. Connecting these observed populations to the process of reionization requires understanding how efficiently they produce L…
View article: [Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate-mass black hole
[Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate-mass black hole Open
Here, we present high spectral resolution ${\it JWST}$ NIRSpec observations of GN 42437, a low-mass (log(M$_\ast /{\rm M}_\odot)=7.9$), compact ($r_e \lt 500$pc), extreme starburst galaxy at $z=5.59$ with 13 emission-line detections. GN 42…
View article: The Low-Redshift Lyman Continuum Survey: The Roles of Stellar Feedback and ISM Geometry in LyC Escape
The Low-Redshift Lyman Continuum Survey: The Roles of Stellar Feedback and ISM Geometry in LyC Escape Open
One of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond $z\sim6$. To address this question, many studies over the past decade have focused on local ($z\sim0.3$) g…
View article: The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies
The Effect of Radiation and Supernovae Feedback on LyC Escape in Local Star-forming Galaxies Open
Feedback is widely recognized as an essential condition for Lyman continuum (LyC) escape in star-forming galaxies. However, the mechanisms by which galactic outflows clear neutral gas and dust remain unclear. In this paper, we model the Mg…
View article: Multivariate Predictors of Lyman Continuum Escape. I. A Survival Analysis of the Low-redshift Lyman Continuum Survey*
Multivariate Predictors of Lyman Continuum Escape. I. A Survival Analysis of the Low-redshift Lyman Continuum Survey* Open
To understand how galaxies reionized the Universe, we must determine how the escape fraction of Lyman continuum (LyC) photons ( f esc ) depends on galaxy properties. Using the z ∼ 0.3 Low-redshift Lyman Continuum Survey (LzLCS), we develop…
View article: Multivariate Predictors of LyC Escape II: Predicting LyC Escape Fractions for High-Redshift Galaxies
Multivariate Predictors of LyC Escape II: Predicting LyC Escape Fractions for High-Redshift Galaxies Open
JWST is uncovering the properties of ever increasing numbers of galaxies at z>6, during the epoch of reionization. Connecting these observed populations to the process of reionization requires understanding how efficiently they produce Lym…
View article: Multivariate Predictors of LyC Escape I: A Survival Analysis of the Low-redshift Lyman Continuum Survey
Multivariate Predictors of LyC Escape I: A Survival Analysis of the Low-redshift Lyman Continuum Survey Open
To understand how galaxies reionized the universe, we must determine how the escape fraction of Lyman Continuum (LyC) photons (fesc) depends on galaxy properties. Using the z~0.3 Low-redshift Lyman Continuum Survey (LzLCS), we develop and …
View article: Empirical calibration for helium abundance determinations in active galactic nuclei
Empirical calibration for helium abundance determinations in active galactic nuclei Open
For the first time, a calibration between the He i$\lambda 5876$/H $\beta$ emission line ratio and the helium abundance y = 12 + log(He/H) for Narrow line regions of Seyfert 2 Active Galactic Nuclei is proposed. In this context, observatio…