Steven R. Furlanetto
YOU?
Author Swipe
View article: Exploring One-point Statistics in HERA Phase I Data: Effects of Foregrounds and Systematics on Measuring One-point Statistics
Exploring One-point Statistics in HERA Phase I Data: Effects of Foregrounds and Systematics on Measuring One-point Statistics Open
Measuring one-point statistics in redshifted 21 cm intensity maps offers an opportunity to explore non-Gaussian features of the early Universe. We assess the impact of instrumental effects on measurements made with the Hydrogen Epoch of Re…
View article: Efficient semi-analytic modelling of Pop III star formation from Cosmic Dawn to Reionization
Efficient semi-analytic modelling of Pop III star formation from Cosmic Dawn to Reionization Open
The quest to find the first stars has driven astronomers across cosmic time, from hopes to identify their signatures in their heyday at cosmic dawn to deep searches for their remnants in our local neighborhood. Such work crucially relies o…
View article: The implications of overmassive black holes at <i>z</i> > 5 for quasar and black hole growth
The implications of overmassive black holes at <i>z</i> > 5 for quasar and black hole growth Open
Recent JWST surveys of high-redshift galaxies have found surprisingly large black holes, with many being measured to be ∼ 70 times more massive than black holes in local galaxies with the same stellar mass. Here, we find that a population …
View article: A physically-motivated template set for high- <i>z</i> galaxy SED fitting
A physically-motivated template set for high- <i>z</i> galaxy SED fitting Open
We introduce a new physically-motivated spectral template set for fitting the spectral energy distributions (SEDs) of high- z galaxies. We use the public galaxy formation code ares to generate star formation histories of thirteen represent…
View article: LIMFAST. IV. Learning High-Redshift Galaxy Formation from Multiline Intensity Mapping with Implicit Likelihood Inference
LIMFAST. IV. Learning High-Redshift Galaxy Formation from Multiline Intensity Mapping with Implicit Likelihood Inference Open
By opening up new avenues to statistically constrain astrophysics and cosmology with large-scale structure observations, the line intensity mapping (LIM) technique calls for novel tools for efficient forward modeling and inference. Implici…
View article: The implications of overmassive black holes at $z > 5$ for quasar and black hole growth
The implications of overmassive black holes at $z > 5$ for quasar and black hole growth Open
Recent JWST surveys of high-redshift galaxies have found surprisingly large black holes, with many being measured to be $\sim100$ times more massive than local galaxies with the same stellar mass. Here, we find that a population of these b…
View article: Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside
Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside Open
The search for habitable conditions beyond Earth is a top priority in astrophysics. The discovery of habitable exoplanets beyond our solar system will require a suite of instruments providing long-term monitoring for detection (e.g. with s…
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: Investigating mutual coupling in the hydrogen epoch of reionization array and mitigating its effects on the 21-cm power spectrum
Investigating mutual coupling in the hydrogen epoch of reionization array and mitigating its effects on the 21-cm power spectrum Open
Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on the 21-cm power spectrum, but some k-modes remain systematics-dominated. Mutual cou…
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: LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-infrared Backgrounds
LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-infrared Backgrounds Open
The timeline of cosmic reionization remains uncertain despite sustained efforts to study how the ionizing output of early galaxies shaped the intergalactic medium (IGM). Using the seminumerical code LIMFAST, we investigate the prospects fo…
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: Impacts and Statistical Mitigation of Missing Data on the 21 cm Power Spectrum: A Case Study with the Hydrogen Epoch of Reionization Array
Impacts and Statistical Mitigation of Missing Data on the 21 cm Power Spectrum: A Case Study with the Hydrogen Epoch of Reionization Array Open
The precise characterization and mitigation of systematic effects is one of the biggest roadblocks impeding the detection of the fluctuations of cosmological 21 cm signals. Missing data in radio cosmological experiments, often due to radio…
View article: Signatures of high-redshift galactic outflows in the thermal Sunyaev Zel’dovich effect
Signatures of high-redshift galactic outflows in the thermal Sunyaev Zel’dovich effect Open
Anisotropies of the Sunyaev–Zel’dovich (SZ) effect serve as a powerful probe of the thermal history of the universe. At high redshift, hot galactic outflows driven by supernovae (SNe) can inject a significant amount of thermal energy into …
View article: <tt>matvis</tt>: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays
matvis: a matrix-based visibility simulator for fast forward modelling of many-element 21 cm arrays Open
Detection of the faint 21 cm line emission from the Cosmic Dawn and Epoch of Reionization will require not only exquisite control over instrumental calibration and systematics to achieve the necessary dynamic range of observations but also…
View article: A demonstration of the effect of fringe-rate filtering in the hydrogen epoch of reionization array delay power spectrum pipeline
A demonstration of the effect of fringe-rate filtering in the hydrogen epoch of reionization array delay power spectrum pipeline Open
Radio interferometers targeting the 21cm brightness temperature fluctuations at high redshift are subject to systematic effects that operate over a range of different time-scales. These can be isolated by designing appropriate Fourier filt…
View article: LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-Infrared Backgrounds
LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-Infrared Backgrounds Open
The timeline of cosmic reionization remains uncertain despite sustained efforts to study how the ionizing output of early galaxies shaped the intergalactic medium (IGM). Using the semi-numerical code LIMFAST, we investigate the prospects f…
View article: Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations
Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations Open
The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionization (EoR). This has led to the construction of low-frequency radio interferometric arrays, such as the Hydrogen Epoch of Reioni…
View article: Effects of Bursty Star Formation on [C ii] Line Intensity Mapping of High-redshift Galaxies
Effects of Bursty Star Formation on [C ii] Line Intensity Mapping of High-redshift Galaxies Open
Bursty star formation—a key prediction for high-redshift galaxies from cosmological simulations explicitly resolving stellar feedback in the interstellar medium—has recently been observed to prevail among galaxies at redshift z ≳ 6. Line i…
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: Bayesian estimation of cross-coupling and reflection systematics in 21cm array visibility data
Bayesian estimation of cross-coupling and reflection systematics in 21cm array visibility data Open
Observations with radio arrays that target the 21-cm signal originating from the early Universe suffer from a variety of systematic effects. An important class of these are reflections and spurious couplings between antennas. We apply a Ha…
View article: Reionization after <i>JWST</i>: a photon budget crisis?
Reionization after <i>JWST</i>: a photon budget crisis? Open
New JWST observations are revealing the first galaxies to be prolific producers of ionizing photons, which we argue gives rise to a tension between different probes of reionization. Over the last two decades, a consensus has emerged where …
View article: Signatures of high-redshift galactic outflows in the thermal Sunyaev Zel'dovich effect
Signatures of high-redshift galactic outflows in the thermal Sunyaev Zel'dovich effect Open
Anisotropies of the Sunyaev Zel'dovich (SZ) effect serve as a powerful probe of the thermal history of the universe. At high redshift, hot galactic outflows driven by supernovae (SNe) can inject a significant amount of thermal energy into …
View article: Dust in high-redshift galaxies: reconciling UV attenuation and IR emission
Dust in high-redshift galaxies: reconciling UV attenuation and IR emission Open
Dust is a key component of galaxies, but its properties during the earliest eras of structure formation remain elusive. Here we present a simple semi-analytic model of the dust distribution in galaxies at z ≳ 5. We calibrate the free param…
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: Direct Optimal Mapping Image Power Spectrum and its Window Functions
Direct Optimal Mapping Image Power Spectrum and its Window Functions Open
The key to detecting neutral hydrogen during the epoch of reionization (EoR) is to separate the cosmological signal from the dominating foreground radiation. We developed direct optimal mapping (DOM) to map interferometric visibilities; it…
View article: Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations
Mitigating calibration errors from mutual coupling with time-domain filtering of 21 cm cosmological radio observations Open
The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation (EoR). This has led to the construction of low-frequency radio interferometric arrays, such as the Hydrogen Epoch of Reioni…
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: The Predicament of Absorption-dominated Reionization II: Observational Estimate of the Clumping Factor at the End of Reionization
The Predicament of Absorption-dominated Reionization II: Observational Estimate of the Clumping Factor at the End of Reionization Open
The history of reionization reflects the cumulative injection of ionizing photons by sources and the absorption of ionizing photons by sinks. The latter process is traditionally described in terms of a "clumping factor" which encodes the a…
View article: Investigating Mutual Coupling in the Hydrogen Epoch of Reionization Array and Mitigating its Effects on the 21-cm Power Spectrum
Investigating Mutual Coupling in the Hydrogen Epoch of Reionization Array and Mitigating its Effects on the 21-cm Power Spectrum Open
Interferometric experiments designed to detect the highly redshifted 21-cm signal from neutral hydrogen are producing increasingly stringent constraints on the 21-cm power spectrum, but some k-modes remain systematics-dominated. Mutual cou…