WEIGHING THE GIANTS: USING GALAXY CLUSTERS TO UNDERSTAND DARK ENERGY
Grant number: DP200101068 | Funding period: 2020 - 2023
This project seeks to reveal the nature of dark energy and thereby explain what is causing expansion of the Universe to accelerate. The project will develop new deep machine learning techniques to weigh galaxy clusters, and apply them to data from the SPT-3G experiment at the South Pole. By comparing theoretical predictions to the observed numbers and masses of galaxy clusters, the project will help determine whether the acceleration is due to dark energy or a breakdown in general relativity. The data science training received by students and researchers on the project will also contribute to a highly skilled STEM workforce for Australia.
Related publications (14)
Measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel’dovich effect with SPT-3G and DES
E Schiappucci, F Bianchini, M Aguena, M Archipley, L Balkenhol, LE Bleem, P Chaubal, TM Crawford, S Grandis, Y Omori, CL Reichardt, E Rozo, ES Rykoff, C To, TMC Abbott, PAR Ade, O Alves, AJ Anderson, F Andrade-Oliveira, J Annis
Evidence for AGN-regulated Cooling in Clusters at z similar to 1.4: A Multiwavelength View of SPT-CL J0607-4448
Megan Masterson, Michael McDonald, Behzad Ansarinejad, Matthew Bayliss, Bradford AA Benson, Lindsey EE Bleem, Michael SS Calzadilla, Alastair CC Edge, Benjamin Floyd, Keunho JJ Kim, Gourav Khullar, Taweewat Somboonpanyakul
We present a multiwavelength analysis of the galaxy cluster SPT-CL J0607-4448 (SPT0607), which is one of the most distant clusters..
Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. I. Construction of CMB lensing maps and modeling choices
Y Omori, EJ Baxter, C Chang, O Friedrich, A Alarcon, O Alves, A Amon, F Andrade-Oliveira, K Bechtol, MR Becker, GM Bernstein, J Blazek, LE Bleem, H Camacho, A Campos, A Carnero Rosell, M Carrasco Kind, R Cawthon, R Chen, A Choi
Joint analyses of cross-correlations between measurements of galaxy positions, galaxy lensing, and lensing of the cosmic microwave..
Joint analysis of Dark Energy Survey Year 3 data and CMB lensing from SPT and Planck. II. Cross-correlation measurements and cosmological constraints
C Chang, Y Omori, EJ Baxter, C Doux, A Choi, S Pandey, A Alarcon, O Alves, A Amon, F Andrade-Oliveira, K Bechtol, MR Becker, GM Bernstein, F Bianchini, J Blazek, LE Bleem, H Camacho, A Campos, A Carnero Rosell, M Carrasco Kind
Cross-correlations of galaxy positions and galaxy shears with maps of gravitational lensing of the cosmic microwave background (CM..
Galaxy populations in the most distant SPT-SZ clusters
V Strazzullo, M Pannella, JJ Mohr, A Saro, MLN Ashby, MB Bayliss, REA Canning, B Floyd, AH Gonzalez, G Khullar, KJ Kim, M McDonald, CL Reichardt, K Sharon, T Somboonpanyakul
<jats:p>We investigate structural properties of massive galaxy populations in the central regions (< 0.7 <jats:italic>r</jats:i..
Combining Planck and SPT Cluster Catalogs: Cosmological Analysis and Impact on the Planck Scaling Relation Calibration
L Salvati, A Saro, S Bocquet, M Costanzi, B Ansarinejad, BA Benson, LE Bleem, MS Calzadilla, JE Carlstrom, CL Chang, R Chown, AT Crites, T de Haan, MA Dobbs, WB Everett, B Floyd, S Grandis, EM George, NW Halverson, GP Holder
We provide the first combined cosmological analysis of the South Pole Telescope (SPT) and Planck cluster catalogs. The aim is to p..
Synthesizing Stellar Populations in South Pole Telescope Galaxy Clusters. I. Ages of Quiescent Member Galaxies at 0.3 < z < 1.4
Gourav Khullar, Matthew B Bayliss, Michael D Gladders, Keunho J Kim, Michael S Calzadilla, Veronica Strazzullo, Lindsey E Bleem, Guillaume Mahler, Michael McDonald, Benjamin Floyd, Christian L Reichardt, Florian Ruppin, Alexandro Saro, Keren Sharon, Taweewat Somboonpanyakul, Brian Stalder, Antony A Stark
Using stellar population synthesis models to infer star formation histories (SFHs), we analyze photometry and spectroscopy of a la..
Shocks in the stacked Sunyaev-Zel'dovich profiles of clusters II: Measurements from SPT-SZ plus Planck Compton-y map
D Anbajagane, C Chang, B Jain, S Adhikari, EJ Baxter, BA Benson, LE Bleem, S Bocquet, MS Calzadilla, JE Carlstrom, CL Chang, R Chown, TM Crawford, AT Crites, W Cui, T de Haan, L Di Mascolo, MA Dobbs, WB Everett, EM George
We search for the signature of cosmological shocks in stacked gas pressure profiles of galaxy clusters using data from the South P..
Improving Cosmological Constraints from Galaxy Cluster Number Counts with CMB-cluster-lensing Data: Results from the SPT-SZ Survey and Forecasts for the Future
PS Chaubal, CL Reichardt, N Gupta, B Ansarinejad, K Aylor, L Balkenhol, EJ Baxter, F Bianchini, BA Benson, LE Bleem, S Bocquet, JE Carlstrom, CL Chang, TM Crawford, AT Crites, T de Haan, MA Dobbs, WB Everett, B Floyd, EM George
We show the improvement to cosmological constraints from galaxy cluster surveys with the addition of cosmic microwave background (..
The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms
B Ansarinejad, T Shanks, RM Bielby, N Metcalfe, L Infante, DNA Murphy, DJ Rosario, SM Stach
We compare the contribution of active galactic nuclei (AGNs) and star formation towards dust heating in sub-mm galaxies (SMGs). We..
CMB/kSZ and Compton-y Maps from 2500 deg(2) of SPT-SZ and Planck Survey Data
LE Bleem, TM Crawford, B Ansarinejad, BA Benson, S Bocquet, JE Carlstrom, CL Chang, R Chown, AT Crites, T de Haan, MA Dobbs, WB Everett, EM George, R Gualtieri, NW Halverson, GP Holder, WL Holzapfel, JD Hrubes, L Knox, AT Lee
We present component-separated maps of the primary cosmic microwave background/kinematic Sunyaev–Zel'dovich (SZ) amplitude and the..
Constraining Cluster Virialization Mechanism and Cosmology Using Thermal-SZ-selected Clusters from Future CMB Surveys
Srinivasan Raghunathan, Nathan Whitehorn, Marcelo A Alvarez, Han Aung, Nicholas Battaglia, Gilbert P Holder, Daisuke Nagai, Elena Pierpaoli, Christian L Reichardt, Joaquin D Vieira
We forecast the number of galaxy clusters that can be detected via the thermal Sunyaev-Zel'dovich (tSZ) signals by future cosmic m..
Detection of Galactic and Extragalactic Millimeter-wavelength Transient Sources with SPT-3G
S Guns, A Foster, C Daley, A Rahlin, N Whitehorn, PAR Ade, Z Ahmed, E Anderes, AJ Anderson, M Archipley, JS Avva, K Aylor, L Balkenhol, PS Barry, R Basu Thakur, K Benabed, AN Bender, BA Benson, F Bianchini, LE Bleem
High angular resolution cosmic microwave background experiments provide a unique opportunity to conduct a survey of time-variable ..