187 citations · 751 across the 26 of their papers we have counts for
28 papers
LIMFAST. V. Probing Reionization with the Synergy Between 21 cm and Photometric Galaxy Surveys
Guochao Sun, Adam Lidz, Tzu-Ching Chang +4
Cross-correlating the 21\,cm signal from intergalactic neutral hydrogen with the galaxy distribution is a powerful probe of the Epoch of Reionization and the physical mechanisms dr…
Tracing the Cosmic Origins: Machine Learning Reconstruction of the Primordial Density Field from EoR Observations
Anchal Saxena, P. Daniel Meerburg, Guochao Sun +2
Reconstructing the initial conditions of the Universe from late-time tracers would unlock cosmological information buried by non-linear structure formation and astrophysics. We rec…
Searching for Population III stars with line intensity mapping cross-correlations
Sahil Hegde, Guochao Sun, Julian B. Muñoz +1
Decades of searches for Population III stars in individual galaxies have yielded a few potential candidates, but a statistically robust characterization of the demographics of the…
TIME Commissioning Observations: II. On-sky Characterization and the 2D Map Data Processing Pipeline
Benjamin J. Vaughan, Abigail T. Crites, Dongwoo T. Chung +24
The Tomographic Ionized-carbon Mapping Experiment (TIME) is a line intensity mapping (LIM) instrument that is designed to observe the power spectrum of the [CII] ~m emissio…
TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center
Selina F. Yang, Sophie M. McAtee, Benjamin J. Vaughan +24
We present the processing of an observation of Sagittarius A (Sgr A) with the Tomographic Ionized-carbon Mapping Experiment (TIME), part of the 2021-2022 commissioning run to verif…
Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements
Evan C. Mayer, Ian N. Lowe, Daniel P. Marrone +20
The spatial sensitivity pattern of millimeter-wavelength receivers is an important diagnostic of performance and is affected by the alignment of coupling optics. Characterization c…
LIMFAST. IV. Learning High-Redshift Galaxy Formation from Multiline Intensity Mapping with Implicit Likelihood Inference
Guochao Sun, Tri Nguyen, Claude-André Faucher-Giguère +5
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…
LIMFAST. III. Timing Cosmic Reionization with the 21 cm and Near-Infrared Backgrounds
Guochao Sun, Adam Lidz, Tzu-Ching Chang +2
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…
Constraining bursty star formation histories with galaxy UV and H luminosity functions and clustering
Guochao Sun, Julian B. Muñoz, Jordan Mirocha +1
The observed prevalence of galaxies exhibiting bursty star formation histories (SFHs) at has created new challenges and opportunities for understanding their formation…
Effects of Bursty Star Formation on [CII] Line Intensity Mapping of High-redshift Galaxies
Lun-Jun Liu, Guochao Sun, Tzu-Ching Chang +2
Bursty star formation -- a key prediction for high-redshift galaxies from cosmological simulations explicitly resolving stellar feedback in the interstellar medium -- has recently…
Bursty Star Formation Naturally Explains the Abundance of Bright Galaxies at Cosmic Dawn
Guochao Sun, Claude-André Faucher-Giguère, Christopher C. Hayward +3
Recent discoveries of a significant population of bright galaxies at cosmic dawn have enabled critical tests of cosmological galaxy formation models. In…
Probing bursty star formation by cross-correlating extragalactic background light and galaxy surveys
Guochao Sun, Adam Lidz, Andreas L. Faisst +1
Understanding the star formation rate (SFR) variability and how it depends on physical properties of galaxies is important for developing and testing the theory of galaxy formation…
Seen and unseen: bursty star formation and its implications for observations of high-redshift galaxies with JWST
Guochao Sun, Claude-André Faucher-Giguère, Christopher C. Hayward +1
Both observations and simulations have shown strong evidence for highly time-variable star formation in low-mass and/or high-redshift galaxies, which has important observational im…
Boosting Line Intensity Map Signal-to-Noise with the Ly- Forest Cross-Correlation
Mahdi Qezlou, Simeon Bird, Adam Lidz +6
We forecast the prospects for cross-correlating future line intensity mapping (LIM) surveys with the current and future Ly- forest data. We use large cosmological hydrodynamic s…
LIMFAST. II. Line Intensity Mapping as a Probe of High-Redshift Galaxy Formation
Guochao Sun, Lluís Mas-Ribas, Tzu-Ching Chang +5
The epoch of reionization (EoR) offers a unique window into the dawn of galaxy formation, through which high-redshift galaxies can be studied by observations of both themselves and…
LIMFAST. I. A Semi-Numerical Tool for Line Intensity Mapping
Lluís Mas-Ribas, Guochao Sun, Tzu-Ching Chang +2
We present LIMFAST, a semi-numerical code for simulating high-redshift galaxy formation and cosmic reionization as revealed by multi-tracer line intensity mapping (LIM) signals. LI…
Cosmological Constraints on the Global Star Formation Law of Galaxies: Insights From Baryon Acoustic Oscillation Intensity Mapping
Guochao Sun
Originally proposed as a cosmological probe of the large-scale structure, line intensity mapping (LIM) also offers a unique window into the astrophysics of galaxy evolution. Adding…
The early Universe was dust-rich and extremely hot
Marco P. Viero, Guochao Sun, Dongwoo T. Chung +2
We investigate the dust properties and star-formation signature of galaxies in the early universe by stacking 111227 objects in the recently released COSMOS catalogue on maps at wa…
Probing Population III Initial Mass Functions with He II/H Intensity Mapping
Jasmine Parsons, Lluis Mas-Ribas, Guochao Sun +3
We demonstrate the potential of line-intensity mapping to place constraints on the initial mass function (IMF) of Population III stars via measurements of the mean He II 1640A/H…
Revealing the formation histories of the first stars with the cosmic near-infrared background
Guochao Sun, Jordan Mirocha, Richard H. Mebane +1
The cosmic near-infrared background (NIRB) offers a powerful integral probe of radiative processes at different cosmic epochs, including the pre-reionization era when metal-free, P…
Future Constraints on the Reionization History and the Ionizing Sources from Gamma-ray Burst Afterglows
Adam Lidz, Tzu-Ching Chang, Lluís Mas-Ribas +1
We forecast the reionization history constraints, inferred from Lyman-alpha damping wing absorption features, for a future sample of gamma-ray burst (GRB) afte…
Probing Cosmic Reionization and Molecular Gas Growth with TIME
Guochao Sun, Tzu-Ching Chang, Bade D. Uzgil +23
Line intensity mapping (LIM) provides a unique and powerful means to probe cosmic structures by measuring the aggregate line emission from all galaxies across redshift. The method…
A Self-consistent Framework for Multiline Modeling in Line Intensity Mapping Experiments
Guochao Sun, Brandon S. Hensley, Tzu-Ching Chang +2
Line intensity mapping (LIM) is a promising approach to study star formation and the interstellar medium (ISM) in galaxies by measuring the aggregate line emission from the entire…
Tomography of the Cosmic Dawn and Reionization Eras with Multiple Tracers
Tzu-Ching Chang, Angus Beane, Olivier Dore +41
The Cosmic Dawn and Reionization epochs remain a fundamental but challenging frontier of astrophysics and cosmology. We advocate a large-scale, multi-tracer approach to develop a c…