Explanipedia

Lunar Crustal Magnetization Sourced via the Delivery of Iron-rich Ejecta from Basin-forming Impacts Open

R. Citron, L. L. Hood, Sarah T. Stewart · 2025

The reason for the prevalence of crustal magnetic anomalies within a lunar crust composed of materials that do not retain strong magnetization remains an unresolved question in lunar science. Delivery of iron-rich material from basin-formi…

The SPT-Deep Cluster Catalog: Sunyaev-Zel'dovich Selected Clusters from Combined SPT-3G and SPTpol Measurements over 100 Square Degrees Open

K. Kornoelje, L. E. Bleem, E. S. Rykoff, T. M. C. Abbott, P. A. R. Ade , et al. · 2025

We present a catalog of 500 galaxy cluster candidates in the SPT-Deep field: a 100 deg$^2$ field that combines data from the SPT-3G and SPTpol surveys to reach noise levels of 3.0, 2.2, and 9.0 $\mu$K-arcmin at 95, 150, and 220 GHz, respec…

SPT clusters with DES and HST weak lensing. II. Cosmological constraints from the abundance of massive halos Open

S. Bocquet, S. Grandis, L. E. Bleem, Matthias Klein, J. J. Mohr , et al. · 2024

Here, we present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel’dovich (SZ) effect in South Pole Telescope (SPT) data with a simultaneous mass calibration using weak gravitational lensin…

First Constraints on the Epoch of Reionization Using the Non-Gaussianity of the Kinematic Sunyaev-Zel’dovich Effect from the South Pole Telescope and Herschel-SPIRE Observations Open

S. Raghunathan, P. A. R. Ade, A. J. Anderson, B. Ansarinejad, M. Archipley , et al. · 2024

We report results from an analysis aimed at detecting the trispectrum of the kinematic Sunyaev-Zel'dovich (kSZ) effect by combining data from the South Pole Telescope (SPT) and Herschel-SPIRE experiments over a 100 deg^{2} field. The SPT o…

Weak magnetism of Martian impact basins may reflect cooling in a reversing dynamo Open

Sarah Steele, Roger Fu, Anna Mittelholz, A. Ermakov, R. Citron , et al. · 2024

Understanding the longevity of Mars's dynamo is key to interpreting the planet's atmospheric loss history and the properties of its deep interior. Satellite data showing magnetic lows above many large impact basins formed 4.1-3.7 billion y…

The South Pole‐Aitken Basin: Constraints on Impact Excavation, Melt, and Ejecta Open

R. Citron, David E. Smith, Sarah T. Stewart, L. L. Hood, M. T. Zuber · 2024

The formation and evolution of the South Pole‐Aitken (SPA) basin is critical to relating large impact basin formation and modification to lunar geophysical evolution. Most prior models of the SPA impact were conducted in 2D, making it diff…

First Constraints on the Epoch of Reionization Using the non-Gaussianity\n of the Kinematic Sunyaev-Zel{'}dovich Effect from the South Pole Telescope\n and {\\it Herschel}-SPIRE Observations Open

S. Raghunathan, P. A. R. Ade, A. J. Anderson, B. Ansarinejad, M. Archipley , et al. · 2024

We report results from an analysis aimed at detecting the trispectrum of the\nkinematic Sunyaev-Zel{'}dovich (kSZ) effect by combining data from the South\nPole Telescope (SPT) and {\\it Herschel}-SPIRE experiments over a 100 ${\\rm\ndeg}^…

Galaxy Clusters Discovered via the Thermal Sunyaev-Zel’dovich Effect in the 500-square-degree SPTpol Survey Open

L. E. Bleem, Matthias Klein, T. M. C. Abbot, P. A. R. Ade, M. Aguena , et al. · 2024

We present a catalog of 689 galaxy cluster candidates detected at significance ξ > 4 via their thermal Sunyaev-Zel’dovich (SZ) effect signature in 95 and 150 GHz data from the 500-square-degree SPTpol survey. We use optical and infrared da…

SPT Clusters with DES and HST Weak Lensing. II. Cosmological Constraints from the Abundance of Massive Halos Open

S. Bocquet, S. Grandis, L. E. Bleem, Matthias Klein, J. J. Mohr , et al. · 2024

We present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (SZ) effect in South Pole Telescope (SPT) data with a simultaneous mass calibration using weak gravitational lensing data…

SPA_modeling_paper_archive Open

R. Citron · 2023

This archive contains data in support of the paper "The South Pole-Aitken basin: Constraints on impact excavation, melt, and ejecta" by Citron et al., submitted to GRL. The archive consists of:<…

SPA_modeling_paper_archive Open

R. Citron · 2023

This archive contains data in support of the paper "The South Pole-Aitken basin: Constraints on impact excavation, melt, and ejecta" by Citron et al., submitted to GRL. The archive consists of: ANEOS input files for the equations of state …

Erratum: “Large Impacts onto the Early Earth: Planetary Sterilization and Iron Delivery” (2022, PSJ, 3, 116) Open

R. Citron, Sarah T. Stewart · 2023

Simultaneous Millimeter-wave, Gamma-Ray, and Optical Monitoring of the Blazar PKS 2326-502 during a Flaring State Open

J. C. Hood, A. Simpson, Alex McDaniel, A. Foster, P. A. R. Ade , et al. · 2023

Including millimeter-wave data in multiwavelength studies of the variability of active galactic nuclei (AGN) can provide insights into AGN physics that are not easily accessible at other wavelengths. We demonstrate in this work the potenti…

Erratum: “Reduced Atmospheres of Post-impact Worlds: The Early Earth” (2022, PSJ, 3, 115) Open

Jonathan Itcovitz, Auriol S. P. Rae, R. Citron, Sarah T. Stewart, Catriona Sinclair , et al. · 2023

Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope Open

P. M. Chichura, A. Foster, C. Patel, N. Ossa-Jaen, P. A. R. Ade , et al. · 2022

We present the first measurements of asteroids in millimeter wavelength data from the South Pole Telescope (SPT), which is used primarily to study the cosmic microwave background (CMB). We analyze maps of two ∼270 deg 2 sky regions near th…

Reduced Atmospheres of Post-impact Worlds: The Early Earth Open

Jonathan Itcovitz, Auriol S. P. Rae, R. Citron, Sarah T. Stewart, Catriona Sinclair , et al. · 2022

Impacts may have had a significant effect on the atmospheric chemistry of the early Earth. Reduced phases in the impactor (e.g., metallic iron) can reduce the planet’s H 2 O inventory to produce massive atmospheres rich in H 2 . While prev…

Large Impacts onto the Early Earth: Planetary Sterilization and Iron Delivery Open

R. Citron, Sarah T. Stewart · 2022

Late accretion onto the Hadean Earth included large impacts that could have influenced early habitability, either by sterilizing the planet or alternatively catalyzing the origin of life by delivering iron required to create a reducing env…

Large Impacts onto the Early Earth: Planetary Sterilization and Iron Delivery Open

R. Citron, Sarah T. Stewart · 2022

Late accretion onto the Hadean Earth included large impacts that could have influenced early habitability, either by sterilizing the planet or alternatively catalyzing the origin of life by delivering iron required to create a reducing env…

Optimal Cosmic Microwave Background Lensing Reconstruction and Parameter Estimation with SPTpol Data Open

M. Millea, C. Daley, T.-L. Chou, Ethan Anderes, P. A. R. Ade , et al. · 2021

We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of the gravitational lensing of the cosmic microwave background (CMB), using 100 deg 2 of polarization observations from the SPTpol receiver on the S…

How reduced can post-impact terrestrial atmospheres be? Open

Jonathan Itcovitz, Auriol S. P. Rae, Oliver Shorttle, R. Citron, Sarah E. Stewart , et al. · 2021

Giant impacts have been suggested as promising scenarios under which reduced species important to prebiotic chemistry can form (e.g., CH4, NH3, HCN, PH3). This scenario relies on the ability of the impactor iron core to chemically reduce t…

Hydrodynamic instability at impact interfaces and planetary implications Open

Avi Ravid, R. Citron, Raymond Jeanloz · 2021

Impact-induced mixing between bolide and target is fundamental to the geochemical evolution of a growing planet, yet aside from local mixing due to jetting – associated with large angles of incidence between impacting surfaces – mixing dur…

A demonstration of improved constraints on primordial gravitational waves with delensing Open

P. A. R. Ade, Zeeshan Ahmed, M. Amiri, A. J. Anderson, Jason E. Austermann , et al. · 2021

We present a constraint on the tensor-to-scalar ratio, r, derived from measurements of cosmic microwave background (CMB) polarization B-modes with “delensing,” whereby the uncertainty on r contributed by the sample variance of the gravitat…

Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data Open

M. Millea, C. Daley, T.-L. Chou, Ethan Anderes, P. A. R. Ade , et al. · 2020

We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of the gravitational lensing of the cosmic microwave background (CMB), using 100 deg$^2$ of polarization observations from the SPTpol receiver on the…

Searching for anisotropic cosmic birefringence with polarization data from SPTpol Open

F. Bianchini, W. L. K. Wu, P. A. R. Ade, A. J. Anderson, Jason E. Austermann , et al. · 2020

In this paper, we present a search for anisotropic cosmic birefringence in 500 deg2 of southern sky observed at 150 GHz with the SPTpol camera on the South Pole Telescope. We reconstruct a map of cosmic polarization rotation anisotropies …

Measurements of -mode polarization of the cosmic microwave background from 500 square degrees of SPTpol data Open

J. T. Sayre, C. L. Reichardt, J. W. Henning, P. A. R. Ade, A. J. Anderson , et al. · 2020

We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope. This work uses 500 deg² of SPTpol data, a five-fold…

Effects of Heat‐Producing Elements on the Stability of Deep Mantle Thermochemical Piles Open

R. Citron, Diogo L. Lourenço, Alfred J. Wilson, Antoniette Greta Grima, Scott A. Wipperfurth , et al. · 2020

Geochemical observations of ocean island and mid‐ocean ridge basalts suggest that abundances of heat‐producing elements (HPEs: U, Th, and K) vary within the mantle. Combined with bulk silicate Earth models and constraints on the Earth's he…

The SPTpol Extended Cluster Survey Open

L. E. Bleem, S. Bocquet, B. Stalder, Michael D. Gladders, P. A. R. Ade , et al. · 2020

We describe the observations and resultant galaxy cluster catalog from the 2770 deg 2 SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev–Zel’dovich (SZ) effect and confirmed with a combination of archival and…

Galaxy Clusters Selected via the Sunyaev–Zel’dovich Effect in the SPTpol 100-square-degree Survey Open

N. Huang, L. E. Bleem, B. Stalder, P. A. R. Ade, S. W. Allen , et al. · 2020

We present a catalog of galaxy cluster candidates detected in 100 square degrees surveyed with the SPTpol receiver on the South Pole Telescope. The catalog contains 89 candidates detected with a signal-to-noise ratio greater than 4.6. The …

Constraints on Cosmological Parameters from the 500 deg2 SPTPOL Lensing Power Spectrum Open

F. Bianchini, W. L. K. Wu, P. A. R. Ade, A. J. Anderson, Jason E. Austermann , et al. · 2020

We present cosmological constraints based on the cosmic microwave background (CMB) lensing potential power spectrum measurement from the recent 500 deg 2 SPTpol survey, the most precise CMB lensing measurement from the ground to date. We f…

enriched_piles_paper_data_archive Open

R. Citron · 2019

Archive for data from: Effects of heat-producing elements on the stability of deep mantle thermochemical piles R.I. Citron, D.L. Lourenco, A.J. Wilson, A.G. Grima, S.A. Wipperfurth, M.L Rudolph, S. Cottaar, L. Montesi

R. Citron YOU? Author Swipe