John Pharo
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View article: Multiple star-forming episodes of intermediate-redshift galaxies
Multiple star-forming episodes of intermediate-redshift galaxies Open
In this work, we derive and analyse the star formation histories of 393 intermediate-redshift (0.1 łeq z łeq 0.9) galaxies with stellar masses between ∼10^8 - 10^12 M_⊙. We focus on galaxies located in the CANDELS/GOOD-S and CANDELS/COSMOS…
View article: The MUSE eXtremely Deep Field
The MUSE eXtremely Deep Field Open
Context. The hydrogen Lyman-alpha (Ly α ) line, the brightest rest-frame ultraviolet line of high-redshift galaxies, exhibits a large variety of shapes, which is due to factors at different scales, from the interstellar medium to the inter…
View article: The Second Case of a Major Merger Triggering a Starburst in a Green Pea Galaxy
The Second Case of a Major Merger Triggering a Starburst in a Green Pea Galaxy Open
We have used the Karl G. Jansky Very Large Array (VLA) to map H i 21 cm emission from the Green Pea galaxy GP J1148+2546 at z ≈ 0.0451, only the second measurement of the H i spatial distribution of a Green Pea. The VLA H i 21 cm image, th…
View article: The MUSE Extremely Deep Field: Classifying the Spectral Shapes of Lya Emitting Galaxies
The MUSE Extremely Deep Field: Classifying the Spectral Shapes of Lya Emitting Galaxies Open
The Hydrogen Lyman-alpha (Lya) line shows a large variety of shapes which is caused by factors at different scales, from the interstellar medium to the intergalactic medium. This work aims to provide a systematic inventory and classificati…
View article: The Second Case of a Major Merger Triggering a Starburst in a Green Pea Galaxy
The Second Case of a Major Merger Triggering a Starburst in a Green Pea Galaxy Open
We have used the Karl G. Jansky Very Large Array (VLA) to map H{\sc i} 21\,cm emission from the Green Pea galaxy GP~J1148+2546 at $z\approx0.0451$, only the second measurement of the H{\sc i} spatial distribution of a Green Pea. The VLA H{…
View article: The intrinsic distribution of Lyman-<i>α</i> halos
The intrinsic distribution of Lyman-<i>α</i> halos Open
The emission and escape of Lyman- α photons from star-forming galaxies is determined through complex interactions between the emitted photons and a galaxy’s interstellar and circumgalactic gas. This causes Lyman- α emitters (LAEs) to commo…
View article: A galactic outflow traced by its extended Mg II emission out to a ∼30 kpc radius in the Hubble Ultra Deep Field with MUSE
A galactic outflow traced by its extended Mg II emission out to a ∼30 kpc radius in the Hubble Ultra Deep Field with MUSE Open
We report the discovery of a rare Mg II λλ 2796, 2803 doublet emission halo around a star-forming galaxy with log( M ⋆ /M ⊙ ) = 10.3 ± 0.3 at z = 0.737 in deep (9.94 h) VLT/MUSE data from the MUSE-HUDF mosaic. While the central region prom…
View article: The Intrinsic Distribution of Lyman-$α$ Halos
The Intrinsic Distribution of Lyman-$α$ Halos Open
The emission and escape of Lyman-$α$ photons from star-forming galaxies is determined through complex interactions between the emitted photons and a galaxy's interstellar and circumgalactic gas, causing Lyman-$α$ emitters (LAEs) to commonl…
View article: A galactic outflow traced by its extended Mg II emission out to a $\sim30$ kpc radius in the Hubble Ultra Deep Field with MUSE
A galactic outflow traced by its extended Mg II emission out to a $\sim30$ kpc radius in the Hubble Ultra Deep Field with MUSE Open
We report the discovery of a rare Mg II $λ$$λ$ 2796, 2803 doublet emission halo around a star forming galaxy with $\log (M_\star$/M$_\odot) = 10.3 \pm 0.3$ at $z=0.737$ in deep (9.94 h) VLT/MUSE data from the MUSE-HUDF mosaic. While the ce…
View article: Charting the Lyman-<i>α</i> escape fraction in the range 2.9 < <i>z</i> < 6.7 and consequences for the LAE reionisation contribution
Charting the Lyman-<i>α</i> escape fraction in the range 2.9 < <i>z</i> < 6.7 and consequences for the LAE reionisation contribution Open
Context. The escape of Lyman- α photons at redshifts greater than two is an ongoing subject of study and an important quantity to further understanding of Lyman- α emitters (LAEs), the transmission of Lyman- α photons through the interstel…
View article: Charting the Lyman-alpha escape fraction in the range 2.9
Charting the Lyman-alpha escape fraction in the range 2.9 Open
The escape of Lyman-alpha photons at redshifts greater than two is an ongoing subject of study and an important quantity to further understanding of Lyman-alpha emitters (LAEs), the transmission of Lyman-alpha photons through the interstel…
View article: The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: End-To-End simulator 'BlueSi'
The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: End-To-End simulator 'BlueSi' Open
BlueMUSE is a blue, medium spectral resolution, panoramic integral-field spectrograph under development for the Very Large Telescope (VLT). We demonstrate and discuss an early End-To-End simulation software for final BlueMUSE datacube prod…
View article: Median surface-brightness profiles of Lyman-<i>α</i> haloes in the MUSE Extremely Deep Field
Median surface-brightness profiles of Lyman-<i>α</i> haloes in the MUSE Extremely Deep Field Open
We present the median surface brightness profiles of diffuse Ly α haloes (LAHs) around star-forming galaxies by stacking 155 spectroscopically confirmed Ly α emitters (LAEs) at 3 < z < 4 in the MUSE Extremely Deep Field (MXDF) with a media…
View article: Dwarf galaxies show little ISM evolution from $z\sim1$ to $z\sim0$: a spectroscopic study of metallicity, star formation, and electron density
Dwarf galaxies show little ISM evolution from $z\sim1$ to $z\sim0$: a spectroscopic study of metallicity, star formation, and electron density Open
We present gas-phase metallicity measurements for 583 emission line galaxies at $0.31$. These results all suggest that there is little evolution in star-forming interstellar medium conditions from $z\sim1$ to $z=0$, confirmed with a more c…
View article: Median Surface Brightness Profiles of Lyman-$α$ Haloes in the MUSE Extremely Deep Field
Median Surface Brightness Profiles of Lyman-$α$ Haloes in the MUSE Extremely Deep Field Open
We present the median surface brightness profiles of diffuse Ly$α$ haloes (LAHs) around star-forming galaxies by stacking 155 spectroscopically confirmed Ly$α$ emitters (LAEs) at 3
View article: The contribution of faint Lyman-<i>α</i>emitters to extended Lyman-<i>α</i>halos constrained by MUSE clustering measurements
The contribution of faint Lyman-<i>α</i>emitters to extended Lyman-<i>α</i>halos constrained by MUSE clustering measurements Open
Recent detections of extended Lyman- α halos around Ly α emitters (LAEs) have been reported on a regular basis, but their origin is still under investigation. Simulation studies predict that the outer regions of the extended halos contain …
View article: The contribution of faint Lyman-$α$ emitters to extended Lyman-$α$ halos constrained by MUSE clustering measurements
The contribution of faint Lyman-$α$ emitters to extended Lyman-$α$ halos constrained by MUSE clustering measurements Open
Detections of extended Ly$α$ halos (LAHs) around Ly$α$ emitters (LAEs) have lately been reported on a regular basis, but their origin is still under investigation. Simulation studies predict that the outer regions of the extended LAHs cont…
View article: The Neon Gap: Probing Ionization with Dwarf Galaxies at z ∼ 1
The Neon Gap: Probing Ionization with Dwarf Galaxies at z ∼ 1 Open
We present measurements of [Ne iii ] λ 3869 emission in z ∼ 1 low-mass galaxies taken from the Keck/DEIMOS spectroscopic surveys HALO7D and DEEPwinds. We identify 167 individual galaxies with significant [Ne iii ] emission lines, including…
View article: The Neon Gap: Probing Ionization with Dwarf Galaxies at z~1
The Neon Gap: Probing Ionization with Dwarf Galaxies at z~1 Open
We present measurements of [NeIII]λ3869 emission in z~1 low-mass galaxies taken from the Keck/DEIMOS spectroscopic surveys HALO7D and DEEPWinds. We identify 167 individual galaxies with significant [NeIII] emission lines, including 112 "dw…
View article: Finding Peas in the Early Universe with JWST
Finding Peas in the Early Universe with JWST Open
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at Cosmic Dawn. We analyze the Near Infrared Spectrograph ERO spectra of three z ∼ 8 galaxies to determine their metal…
View article: New Spectroscopic Confirmations of Lyα Emitters at Z ∼ 7 from the LAGER Survey
New Spectroscopic Confirmations of Lyα Emitters at Z ∼ 7 from the LAGER Survey Open
We report spectroscopic confirmations of 15 Ly α galaxies at z ∼ 7, implying a spectroscopic confirmation rate of ∼80% on candidates selected from the Ly α Galaxies in the Epoch of Reionization (LAGER), which is the largest (24 deg 2 ) sur…
View article: Finding Peas in the Early Universe with JWST
Finding Peas in the Early Universe with JWST Open
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise of JWST in characterizing the universe at cosmic dawn. We analyze the ERO spectra of three $z \sim 8$ galaxies to determine their metallicities, gas temperat…
View article: The Dwarf Galaxy Population at z ∼ 0.7: A Catalog of Emission Lines and Redshifts from Deep Keck Observations
The Dwarf Galaxy Population at z ∼ 0.7: A Catalog of Emission Lines and Redshifts from Deep Keck Observations Open
We present a catalog of spectroscopically measured redshifts over 0 < z < 2 and emission-line fluxes for 1440 galaxies. The majority (∼65%) of the galaxies come from the HALO7D survey, with the remainder from the DEEPwinds program. This ca…
View article: The Dwarf Galaxy Population at $z\sim 0.7$: A Catalog of Emission Lines and Redshifts from Deep Keck Observations
The Dwarf Galaxy Population at $z\sim 0.7$: A Catalog of Emission Lines and Redshifts from Deep Keck Observations Open
We present a catalog of spectroscopically measured redshifts over $0 < z < 2$ and emission line fluxes for 1440 galaxies. The majority ($\sim$65\%) of the galaxies come from the HALO7D survey, with the remainder from the DEEPwinds program.…
View article: LAGER Lyα Luminosity Function at z ∼ 7: Implications for Reionization
LAGER Lyα Luminosity Function at z ∼ 7: Implications for Reionization Open
We present a new measurement of the Ly α luminosity function (LF) at redshift z = 6.9, finding moderate evolution from z = 5.7 that is consistent with a fully or largely ionized z ∼ 7 intergalactic medium. Our result is based on four field…
View article: New spectroscopic confirmations of Lyman-$\alpha$ emitters at z $\sim$ 7 from the LAGER survey
New spectroscopic confirmations of Lyman-$\alpha$ emitters at z $\sim$ 7 from the LAGER survey Open
We report spectroscopic confirmations of 15 Lyman-alpha galaxies at $z\sim7$, implying a spectroscopic confirmation rate of $\sim$80% on candidates selected from LAGER (Lyman-Alpha Galaxies in the Epoch of Reionization), which is the large…
View article: LAGER Ly$\alpha$ Luminosity Function at $z\sim7$, Implications for Reionization
LAGER Ly$\alpha$ Luminosity Function at $z\sim7$, Implications for Reionization Open
We present a new measurement of the Ly$\alpha$ luminosity function at redshift $z=6.9$, finding moderate evolution from $z=5.7$ that is consistent with a fully or largely ionized $z\sim7$ intergalactic medium. Our result is based on four f…
View article: Correlations between H α equivalent width and galaxy properties at <i>z</i> = 0.47: Physical or selection-driven?
Correlations between H α equivalent width and galaxy properties at <i>z</i> = 0.47: Physical or selection-driven? Open
The H α equivalent width (EW) is an observational proxy for specific star formation rate (sSFR) and a tracer of episodic, bursty star-formation activity. Previous assessments show that the H α EW strongly anticorrelates with stellar mass a…
View article: A large, deep 3 deg2 survey of H α, [O <scp>iii</scp>], and [O <scp>ii</scp>] emitters from LAGER: constraining luminosity functions
A large, deep 3 deg2 survey of H α, [O <span>iii</span>], and [O <span>ii</span>] emitters from LAGER: constraining luminosity functions Open
We present our measurements of the H α, [O iii], and [O ii] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 1577 z = 0.47 H α-, 3933 z = 0.93 [O iii]-, and 5367 z = 1.59…