Max Pettini
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View article: The AURORA Survey: Ionizing Photon Production Efficiency with Minimal Nebular Dust Attenuation Systematics
The AURORA Survey: Ionizing Photon Production Efficiency with Minimal Nebular Dust Attenuation Systematics Open
We present ionizing photon production efficiencies ($ξ_{\rm ion}$) for 63 z=1.5-6.9 star-forming galaxies using precise nebular dust attenuation corrections from the JWST/AURORA survey. A subset of objects within AURORA have individually-d…
View article: The AURORA Survey: The Nebular Attenuation Curve of a Galaxy at <i>z</i> = 4.41 from Ultraviolet to Near-infrared Wavelengths
The AURORA Survey: The Nebular Attenuation Curve of a Galaxy at <i>z</i> = 4.41 from Ultraviolet to Near-infrared Wavelengths Open
We use JWST/NIRSpec observations from the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics survey to constrain the shape of the nebular attenuation curve of a star-forming galaxy at z = 4.41, GOODSN-17940. We utilize …
View article: The AURORA Survey: Robust Helium Abundances at High Redshift Reveal A Subpopulation of Helium-Enhanced Galaxies in the Early Universe
The AURORA Survey: Robust Helium Abundances at High Redshift Reveal A Subpopulation of Helium-Enhanced Galaxies in the Early Universe Open
We present the first robust helium (He) abundance measurements in star-forming galaxies at redshifts $1.6\lesssim z\lesssim 3.3$ using deep, moderate-resolution JWST/NIRSpec spectroscopy from the AURORA survey. We establish a High$-z$ HeI …
View article: The AURORA survey: the evolution of multiphase electron densities at high redshift
The AURORA survey: the evolution of multiphase electron densities at high redshift Open
We present an analysis of deep JWST/NIRSpec spectra of star-forming galaxies at $z\simeq 1.4{\!-\!}10$, observed as part of the Assembly of Ultra-deep Rest-optical Observations Revealing Astrophysics (AURORA) survey. We infer median low-io…
View article: The AURORA Survey: An Extraordinarily Mature, Star-forming Galaxy at <i>z</i> ∼ 7
The AURORA Survey: An Extraordinarily Mature, Star-forming Galaxy at <i>z</i> ∼ 7 Open
We present the properties of a massive, large, dusty, metal-rich, star-forming galaxy at z spec = 6.73. GOODSN-100182 was observed with JWST/NIRSpec as part of the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AUR…
View article: The AURORA Survey: A New Era of Emission-line Diagrams with JWST/NIRSpec
The AURORA Survey: A New Era of Emission-line Diagrams with JWST/NIRSpec Open
We present results on the emission-line properties of z = 1.4–7.5 star-forming galaxies in the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AURORA) Cycle 1 JWST/NIRSpec program. Based on its depth, continuous wav…
View article: The AURORA Survey: The Evolution of Multi-phase Electron Densities at High Redshift
The AURORA Survey: The Evolution of Multi-phase Electron Densities at High Redshift Open
We present an analysis of deep $\textit{JWST}$/NIRSpec spectra of star-forming galaxies at $z\simeq1.4-10$, observed as part of the AURORA survey. We infer median low-ionization electron densities of $268_{-49}^{+45}~\rm cm^{-3}$, $350_{-7…
View article: The first large absorption survey in H <scp>i</scp> (FLASH): II. Pilot survey data release and first results
The first large absorption survey in H <span>i</span> (FLASH): II. Pilot survey data release and first results Open
The First Large Absorption Survey in H i (FLASH) is a large-area radio survey for neutral hydrogen in and around galaxies in the intermediate redshift range $0.4\lt z\lt1.0$ , using the 21-cm H i absorption line as a probe of cold neutral …
View article: A survey of extremely metal-poor gas at cosmic noon
A survey of extremely metal-poor gas at cosmic noon Open
Aims. We aim to study the high-precision chemical abundances of metal-poor gas clouds at cosmic noon (2 < z < 4) and investigate the associated enrichment histories. Methods. We analyze the abundances of four newly discovered metal-poor ga…
View article: KBSS-InCLOSE. I. Design and First Results from the Inner Circumgalactic Medium of QSO Line-of-sight Emitting Galaxies at z ∼ 2–3 <sup>*</sup>
KBSS-InCLOSE. I. Design and First Results from the Inner Circumgalactic Medium of QSO Line-of-sight Emitting Galaxies at z ∼ 2–3 <sup>*</sup> Open
We present the design and first results of the inner circumgalactic medium (CGM) of QSO line-of-sight emitting galaxies at z ∼ 2–3, Keck Baryonic Structure Survey (KBSS)-InCLOSE. The survey will connect galaxy properties (e.g., stellar mas…
View article: The AURORA Survey: An Extraordinarily Mature, Star-forming Galaxy at $z\sim 7$
The AURORA Survey: An Extraordinarily Mature, Star-forming Galaxy at $z\sim 7$ Open
We present the properties of a massive, large, dusty, metal-rich, star-forming galaxy at z_spec=6.73. GOODSN-100182 was observed with JWST/NIRSpec as part of the AURORA survey, and is also covered by public multi-wavelength HST and JWST im…
View article: A survey of extremely metal-poor gas at cosmic noon: evidence of elevated [O/Fe]
A survey of extremely metal-poor gas at cosmic noon: evidence of elevated [O/Fe] Open
We aim to study the high-precision chemical abundances of metal-poor gas clouds at cosmic noon (2
View article: The First Large Absorption Survey in HI (FLASH): II. Pilot Survey data release and first results
The First Large Absorption Survey in HI (FLASH): II. Pilot Survey data release and first results Open
The First Large Absorption Survey in HI (FLASH) is a large-area radio survey for neutral hydrogen in the redshift range 0.41$, and appear to be a mixture of intervening and associated systems. Interestingly, around two-thirds of the lines …
View article: The AURORA Survey: The Nebular Attenuation Curve of a Galaxy at z=4.41 from Ultraviolet to Near-Infrared Wavelengths
The AURORA Survey: The Nebular Attenuation Curve of a Galaxy at z=4.41 from Ultraviolet to Near-Infrared Wavelengths Open
We use JWST/NIRSpec observations from the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AURORA) survey to constrain the shape of the nebular attenuation curve of a star-forming galaxy at z=4.41, GOODSN-17940. We u…
View article: The AURORA Survey: A New Era of Emission-line Diagrams with JWST/NIRSpec
The AURORA Survey: A New Era of Emission-line Diagrams with JWST/NIRSpec Open
We present results on the emission-line properties of z=1.4-7.5 star-forming galaxies in the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AURORA) Cycle 1 JWST/NIRSpec program. Based on its depth, continuous wavel…
View article: Precision measures of the primordial abundance of deuterium
Precision measures of the primordial abundance of deuterium Open
We report the discovery of deuterium absorption in the very metal-poor ([Fe/H] = -2.88) damped Lyα system at z abs = 3.06726 toward the QSO SDSS J1358+6522. On the basis of 13 resolved D I absorption lines and the damping wings of the H I …
View article: Towards ultra metal-poor DLAs: linking the chemistry of the most metal-poor DLA to the first stars
Towards ultra metal-poor DLAs: linking the chemistry of the most metal-poor DLA to the first stars Open
We present new Keck/HIRES data of the most metal-poor damped Ly α (DLA) system currently known. By targeting the strongest accessible Fe ii features, we have improved the upper limit of the [Fe/H] abundance determination by ∼1 dex, finding…
View article: Towards ultra metal-poor DLAs: linking the chemistry of the most metal-poor DLA to the first stars
Towards ultra metal-poor DLAs: linking the chemistry of the most metal-poor DLA to the first stars Open
We present new Keck/HIRES data of the most metal-poor damped Lyman-alpha (DLA) system currently known. By targeting the strongest accessible Fe II features, we have improved the upper limit of the [Fe/H] abundance determination by ~1 dex, …
View article: MUSE-ALMA Haloes VIII: Statistical Study of Circumgalactic Medium Gas
MUSE-ALMA Haloes VIII: Statistical Study of Circumgalactic Medium Gas Open
The distribution of gas and metals in the circumgalactic medium (CGM) plays a critical role in how galaxies evolve. The MUSE-ALMA Halos survey combines MUSE, ALMA and HST observations to constrain the properties of the multi-phase gas in t…
View article: MUSE-ALMA Haloes – VIII. Statistical study of circumgalactic medium gas
MUSE-ALMA Haloes – VIII. Statistical study of circumgalactic medium gas Open
The distribution of gas and metals in the circumgalactic medium (CGM) plays a critical role in how galaxies evolve. The MUSE-ALMA Haloes survey combines MUSE, ALMA, and HST observations to constrain the properties of the multiphase gas in …
View article: MUSE–ALMA haloes VII: survey science goals & design, data processing and final catalogues
MUSE–ALMA haloes VII: survey science goals & design, data processing and final catalogues Open
The gas cycling in the circumgalactic regions of galaxies is known to be multi-phase. The MUSE–ALMA Haloes survey gathers a large multi-wavelength observational sample of absorption and emission data with the goal to significantly advance …
View article: Vacuum Ultraviolet Fourier-transform Spectroscopy of <sup>16</sup>O and <sup>18</sup>O
Vacuum Ultraviolet Fourier-transform Spectroscopy of <sup>16</sup>O and <sup>18</sup>O Open
A spectroscopic study of atomic oxygen (O i ) is performed using the Fourier-transform vacuum ultraviolet (VUV) spectrometer at the Dichroïsme Et Spectroscopie par Interaction avec le Rayonnement Synchrotron beamline of the SOLEIL synchrot…
View article: Primordial Helium-3 Redux: The Helium Isotope Ratio of the Orion Nebula*
Primordial Helium-3 Redux: The Helium Isotope Ratio of the Orion Nebula* Open
We report the first direct measurement of the helium isotope ratio, 3 He/ 4 He, outside of the Local Interstellar Cloud, as part of science-verification observations with the upgraded CRyogenic InfraRed Echelle Spectrograph. Our determinat…
View article: Reconciling the results of the <i>z</i> ∼ 2 MOSDEF and KBSS-MOSFIRE Surveys
Reconciling the results of the <i>z</i> ∼ 2 MOSDEF and KBSS-MOSFIRE Surveys Open
The combination of the MOSDEF and KBSS-MOSFIRE surveys represents the largest joint investment of Keck/MOSFIRE time to date, with ∼3000 galaxies at 1.4 ≲ z ≲ 3.8, roughly half of which are at z ∼ 2. MOSDEF is photometric- and spectroscopic…
View article: Oxygen-enhanced Extremely Metal-poor Damped Lyα Systems: A Signpost of the First Stars?
Oxygen-enhanced Extremely Metal-poor Damped Lyα Systems: A Signpost of the First Stars? Open
We present precise abundance determinations of two near-pristine damped Ly α systems (DLAs) to assess the nature of the [O/Fe] ratio at [Fe/H] < −3.0 (i.e., <1/1000 of the solar metallicity). Prior observations indicate that the [O/Fe] rat…
View article: The First Large Absorption Survey in H<scp>i</scp>(FLASH): I. Science goals and survey design
The First Large Absorption Survey in H<span>i</span>(FLASH): I. Science goals and survey design Open
We describe the scientific goals and survey design of the First Large Absorption Survey in H i (FLASH), a wide field survey for 21-cm line absorption in neutral atomic hydrogen (H i ) at intermediate cosmological redshifts. FLASH will be c…
View article: Reconciling the Results of the z~2 MOSDEF and KBSS-MOSFIRE Surveys
Reconciling the Results of the z~2 MOSDEF and KBSS-MOSFIRE Surveys Open
The combination of the MOSDEF and KBSS-MOSFIRE surveys represents the largest joint investment of Keck/MOSFIRE time to date, with ~3000 galaxies at 1.4<=z<=3.8, roughly half of which are at z~2. MOSDEF is photometric- and spectroscopic-red…
View article: SDSS J1059+4251, a Highly Magnified z ∼ 2.8 Star-forming Galaxy: ESI Observations of the Rest-frame UV Spectrum
SDSS J1059+4251, a Highly Magnified z ∼ 2.8 Star-forming Galaxy: ESI Observations of the Rest-frame UV Spectrum Open
Detailed analyses of high-redshift galaxies are challenging because these galaxies are faint, but this difficulty can be overcome with gravitational lensing, in which the magnification of the flux enables spectroscopy with a high signal-to…
View article: The Keck Baryonic Structure Survey: using foreground/background galaxy pairs to trace the structure and kinematics of circumgalactic neutral hydrogen at <i>z</i> ∼ 2
The Keck Baryonic Structure Survey: using foreground/background galaxy pairs to trace the structure and kinematics of circumgalactic neutral hydrogen at <i>z</i> ∼ 2 Open
We present new measurements of the spatial distribution and kinematics of neutral hydrogen in the circumgalactic and intergalactic medium surrounding star-forming galaxies at z ∼ 2. Using the spectra of ≃3000 galaxies with redshifts 〈z〉 = …
View article: FLASH early science – discovery of an intervening H i 21-cm absorber from an ASKAP survey of the GAMA 23 field
FLASH early science – discovery of an intervening H i 21-cm absorber from an ASKAP survey of the GAMA 23 field Open
We present early science results from the First Large Absorption Survey in H i (FLASH), a spectroscopically blind survey for 21-cm absorption lines in cold hydrogen (H i) gas at cosmological distances using the Australian Square Kilometre …