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Measurements of the Lyman- forest flux auto-correlation functions from the extended XQR-30 data set
Molly Wolfson, Joseph F. Hennawi, Sarah E. I. Bosman +14
Recently, the Lyman- (Ly) forest flux auto-correlation function has been shown to be sensitive to the mean free path of hydrogen-ionizing photons, , for simul…
Unveiling Dark Matter free-streaming at the smallest scales with high redshift Lyman-alpha forest
Vid Iršič, Matteo Viel, Martin G. Haehnelt +8
This study introduces novel constraints on the free-streaming of thermal relic warm dark matter (WDM) from Lyman- forest flux power spectra. Our analysis utilises a high-resolut…
Probing Ultra-late Reionization: Direct Measurements of the Mean Free Path over
Yongda Zhu, George D. Becker, Holly M. Christenson +22
The mean free path of ionizing photons, , is a critical parameter for modeling the intergalactic medium (IGM) both during and after reionization. We present direct mea…
Measuring the photo-ionization rate, neutral fraction and mean free path of HI ionizing photons at from a large sample of XShooter and ESI spectra
Prakash Gaikwad, Martin G. Haehnelt, Frederick B. Davies +16
We measure the mean free path (), photo-ionization rate () and neutral fraction () of hydrogen in 12 redshif…
The Sherwood-Relics simulations: overview and impact of patchy reionization and pressure smoothing on the intergalactic medium
Ewald Puchwein, James S. Bolton, Laura C. Keating +10
We present the Sherwood-Relics simulations, a new suite of large cosmological hydrodynamical simulations aimed at modelling the intergalactic medium (IGM) during and after the cosm…
Long Dark Gaps in the Ly Forest at : Evidence of Ultra Late Reionization from XQR-30 Spectra
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +22
We present a new investigation of the intergalactic medium (IGM) near reionization using dark gaps in the Lyman- (Ly) forest. With its lower optical depth, Ly offers a pot…
Constraints on the End of Reionization from the Density Fields Surrounding Two Highly Opaque Quasar Sightlines
Holly M. Christenson, George D. Becker, Steven R. Furlanetto +5
The observed large-scale scatter in Lyman opacity of the intergalactic medium at implies large fluctuations in the neutral hydrogen fraction that are unexpected long afte…
Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly Forest over
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +14
We present a new investigation of the intergalactic medium (IGM) near the end of reionization using "dark gaps" in the Lyman-alpha (Ly) forest. Using spectra of 55 QSOs at $z_{\…
Hydrogen reionisation ends by : Lyman- optical depth measured by the XQR-30 sample
Sarah E. I. Bosman, Frederick B. Davies, George D. Becker +23
The presence of excess scatter in the Ly- forest at , together with the existence of sporadic extended opaque Gunn-Peterson troughs, has started to provide robust evi…
The Predicament of Absorption-Dominated Reionization: Increased Demands on Ionizing Sources
Frederick B. Davies, Sarah E. I. Bosman, Steven R. Furlanetto +2
The reionization epoch concludes when ionizing photons reach every corner of the Universe. Reionization has generally been assumed to be limited primarily by the rate at which gala…
A short mean free path at favors late and rapid reionization by faint galaxies
Christopher Cain, Anson D'Aloisio, Nakul Gangolli +1
Recent measurements of the ionizing photon mean free path () at suggest that the IGM was rapidly evolving at those times. We use radiative transfer s…
The mean free path of ionizing photons at 5 < z < 6: evidence for rapid evolution near reionization
George D. Becker, Anson D'Aloisio, Holly M. Christenson +3
The mean free path of ionizing photons, , is a key factor in the photoionization of the intergalactic medium (IGM). At , however, may be sho…
Probing the thermal state of the intergalactic medium at with the transmission spikes in high-resolution Ly forest spectra
Prakash Gaikwad, Michael Rauch, Martin G. Haehnelt +13
We compare a sample of five high-resolution, high S/N Ly forest spectra of bright QSOs aimed at spectrally resolving the last remaining transmission spikes at…
Astro2020 Science White Paper: Insights Into the Epoch of Reionization with the Highly-Redshifted 21-cm Line
Steven Furlanetto, Chris L. Carilli, Jordan Mirocha +47
The epoch of reionization, when photons from early galaxies ionized the intergalactic medium about a billion years after the Big Bang, is the last major phase transition in the Uni…
Cosmology with the Highly Redshifted 21cm Line
Adrian Liu, James Aguirre, Yacine Ali-Haimoud +47
In addition to being a probe of Cosmic Dawn and Epoch of Reionization astrophysics, the 21cm line at is also a powerful way to constrain cosmology. Its power derives from sev…
Astro2020 Science White Paper: First Stars and Black Holes at Cosmic Dawn with Redshifted 21-cm Observations
Jordan Mirocha, Daniel Jacobs, Josh Dillon +39
The "cosmic dawn" refers to the period of the Universe's history when stars and black holes first formed and began heating and ionizing hydrogen in the intergalactic medium (IGM).…
Astro 2020 Science White Paper: Fundamental Cosmology in the Dark Ages with 21-cm Line Fluctuations
Steven Furlanetto, Judd D. Bowman, Jordan Mirocha +43
The Dark Ages are the period between the last scattering of the cosmic microwave background and the appearance of the first luminous sources, spanning approximately 1100 < z < 30.…
Studying the Reionization Epoch with QSO Absorption Lines
George D. Becker, Anson D'Aloisio, Frederick B. Davies +2
Absorption signatures in the spectra of QSOs are one of our most powerful tools for studying galactic and intergalactic environments at high redshifts. With the discovery of QSOs o…
Mapping Cosmic Dawn and Reionization: Challenges and Synergies
Marcelo A. Alvarez, Anastasia Fialkov, Paul La Plante +47
Cosmic dawn and the Epoch of Reionization (EoR) are among the least explored observational eras in cosmology: a time at which the first galaxies and supermassive black holes formed…
Revealing reionization with the thermal history of the intergalactic medium: new constraints from the Lyman- flux power spectrum
Elisa Boera, George D. Becker, James S. Bolton +1
We present a new investigation of the thermal history of the intergalactic medium (IGM) during and after reionization using the Lyman- forest flux power spectrum at $4.0\lesssim…
Evidence for Large-Scale Fluctuations in the Metagalactic Ionizing Background Near Redshift Six
George D. Becker, Frederick B. Davies, Steven R. Furlanetto +3
The observed scatter in intergalactic Lyman- opacity at requires large-scale fluctuations in the neutral fraction of the intergalactic medium (IGM) after the expe…
A new Measurement of the Intergalactic Temperature at
Alberto Rorai, Robert F. Carswell, Martin G. Haehnelt +3
We present two measurements of the temperature-density relationship (TDR) of the intergalactic medium (IGM) in the redshift range using a sample of 13 high-qualit…
Determining the Nature of Late Gunn-Peterson Troughs with Galaxy Surveys
Frederick B. Davies, George D. Becker, Steven R. Furlanetto
Recent observations have discovered long (up to ~110 Mpc/h), opaque Gunn-Peterson troughs in the z ~ 5.5 Lyman-alpha forest, which are challenging to explain with conventional mode…
First constraints on fuzzy dark matter from Lyman- forest data and hydrodynamical simulations
Vid Iršič, Matteo Viel, Martin G. Haehnelt +2
We present constraints on the masses of extremely light bosons dubbed fuzzy dark matter from Lyman- forest data. Extremely light bosons with a De Broglie wavelength of …