The Atacama Cosmology Telescope DR6 and DESI: Structure formation over cosmic time with a measurement of the cross-correlation of CMB Lensing and Luminous Red Galaxies
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arXiv
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2024
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| author | Kim, Joshua Sailer, Noah Madhavacheril, Mathew S. Ferraro, Simone Abril-Cabezas, Irene Aguilar, Jessica Nicole Ahlen, Steven Bond, J. Richard Brooks, David Burtin, Etienne Calabrese, Erminia Chen, Shi-Fan Choi, Steve K. Claybaugh, Todd Darwish, Omar de la Macorra, Axel DeRose, Joseph Devlin, Mark Dey, Arjun Doel, Peter Dunkley, Jo Embil-Villagra, Carmen Farren, Gerrit S. Font-Ribera, Andreu Forero-Romero, Jaime E. Gaztañaga, Enrique Gluscevic, Vera Gontcho, Satya Gontcho A Guy, Julien Honscheid, Klaus Howlett, Cullan Kirkby, David Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael E. MacCrann, Niall Manera, Marc Marques, Gabriela A. Meisner, Aaron Miquel, Ramon Moodley, Kavilan Moustakas, John Newburgh, Laura B. Newman, Jeffrey A. Niz, Gustavo Orlowski-Scherer, John Palanque-Delabrouille, Nathalie Percival, Will J. Prada, Francisco Qu, Frank J. Rossi, Graziano Sanchez, Eusebio Schaan, Emmanuel Schlafly, Edward F. Schlegel, David Schubnell, Michael Sehgal, Neelima Seo, Hee-Jung Shaikh, Shabbir Sherwin, Blake D. Sifón, Cristóbal Sprayberry, David Staggs, Suzanne T. Tarlé, Gregory van Engelen, Alexander Weaver, Benjamin Alan Wenzl, Lukas White, Martin Wollack, Edward J. Yèche, Christophe Zou, Hu |
| author_facet | Kim, Joshua Sailer, Noah Madhavacheril, Mathew S. Ferraro, Simone Abril-Cabezas, Irene Aguilar, Jessica Nicole Ahlen, Steven Bond, J. Richard Brooks, David Burtin, Etienne Calabrese, Erminia Chen, Shi-Fan Choi, Steve K. Claybaugh, Todd Darwish, Omar de la Macorra, Axel DeRose, Joseph Devlin, Mark Dey, Arjun Doel, Peter Dunkley, Jo Embil-Villagra, Carmen Farren, Gerrit S. Font-Ribera, Andreu Forero-Romero, Jaime E. Gaztañaga, Enrique Gluscevic, Vera Gontcho, Satya Gontcho A Guy, Julien Honscheid, Klaus Howlett, Cullan Kirkby, David Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael E. MacCrann, Niall Manera, Marc Marques, Gabriela A. Meisner, Aaron Miquel, Ramon Moodley, Kavilan Moustakas, John Newburgh, Laura B. Newman, Jeffrey A. Niz, Gustavo Orlowski-Scherer, John Palanque-Delabrouille, Nathalie Percival, Will J. Prada, Francisco Qu, Frank J. Rossi, Graziano Sanchez, Eusebio Schaan, Emmanuel Schlafly, Edward F. Schlegel, David Schubnell, Michael Sehgal, Neelima Seo, Hee-Jung Shaikh, Shabbir Sherwin, Blake D. Sifón, Cristóbal Sprayberry, David Staggs, Suzanne T. Tarlé, Gregory van Engelen, Alexander Weaver, Benjamin Alan Wenzl, Lukas White, Martin Wollack, Edward J. Yèche, Christophe Zou, Hu |
| contents | We present a high-significance cross-correlation of CMB lensing maps from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) with spectroscopically calibrated luminous red galaxies (LRGs) from the Dark Energy Spectroscopic Instrument (DESI). We detect this cross-correlation at a significance of 38$σ$; combining our measurement with the Planck Public Release 4 (PR4) lensing map, we detect the cross-correlation at 50$σ$. Fitting this jointly with the galaxy auto-correlation power spectrum to break the galaxy bias degeneracy with $σ_8$, we perform a tomographic analysis in four LRG redshift bins spanning $0.4 \le z \le 1.0$ to constrain the amplitude of matter density fluctuations through the parameter combination $S_8^\times = σ_8 \left(Ω_m / 0.3\right)^{0.4}$. Prior to unblinding, we confirm with extragalactic simulations that foreground biases are negligible and carry out a comprehensive suite of null and consistency tests. Using a hybrid effective field theory (HEFT) model that allows scales as small as $k_{\rm max}=0.6$ $h/{\rm Mpc}$, we obtain a 3.3% constraint on $S_8^\times = σ_8 \left(Ω_m / 0.3\right)^{0.4} = 0.792^{+0.024}_{-0.028}$ from ACT data, as well as constraints on $S_8^\times(z)$ that probe structure formation over cosmic time. Our result is consistent with the early-universe extrapolation from primary CMB anisotropies measured by Planck PR4 within 1.2$σ$. Jointly fitting ACT and Planck lensing cross-correlations we obtain a 2.7% constraint of $S_8^\times = 0.776^{+0.019}_{-0.021}$, which is consistent with the Planck early-universe extrapolation within 2.1$σ$, with the lowest redshift bin showing the largest difference in mean. The latter may motivate further CMB lensing tomography analyses at $z<0.6$ to assess the impact of potential systematics or the consistency of the $Λ$CDM model over cosmic time. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_04606 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Atacama Cosmology Telescope DR6 and DESI: Structure formation over cosmic time with a measurement of the cross-correlation of CMB Lensing and Luminous Red Galaxies Kim, Joshua Sailer, Noah Madhavacheril, Mathew S. Ferraro, Simone Abril-Cabezas, Irene Aguilar, Jessica Nicole Ahlen, Steven Bond, J. Richard Brooks, David Burtin, Etienne Calabrese, Erminia Chen, Shi-Fan Choi, Steve K. Claybaugh, Todd Darwish, Omar de la Macorra, Axel DeRose, Joseph Devlin, Mark Dey, Arjun Doel, Peter Dunkley, Jo Embil-Villagra, Carmen Farren, Gerrit S. Font-Ribera, Andreu Forero-Romero, Jaime E. Gaztañaga, Enrique Gluscevic, Vera Gontcho, Satya Gontcho A Guy, Julien Honscheid, Klaus Howlett, Cullan Kirkby, David Kisner, Theodore Kremin, Anthony Landriau, Martin Guillou, Laurent Le Levi, Michael E. MacCrann, Niall Manera, Marc Marques, Gabriela A. Meisner, Aaron Miquel, Ramon Moodley, Kavilan Moustakas, John Newburgh, Laura B. Newman, Jeffrey A. Niz, Gustavo Orlowski-Scherer, John Palanque-Delabrouille, Nathalie Percival, Will J. Prada, Francisco Qu, Frank J. Rossi, Graziano Sanchez, Eusebio Schaan, Emmanuel Schlafly, Edward F. Schlegel, David Schubnell, Michael Sehgal, Neelima Seo, Hee-Jung Shaikh, Shabbir Sherwin, Blake D. Sifón, Cristóbal Sprayberry, David Staggs, Suzanne T. Tarlé, Gregory van Engelen, Alexander Weaver, Benjamin Alan Wenzl, Lukas White, Martin Wollack, Edward J. Yèche, Christophe Zou, Hu Cosmology and Nongalactic Astrophysics We present a high-significance cross-correlation of CMB lensing maps from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) with spectroscopically calibrated luminous red galaxies (LRGs) from the Dark Energy Spectroscopic Instrument (DESI). We detect this cross-correlation at a significance of 38$σ$; combining our measurement with the Planck Public Release 4 (PR4) lensing map, we detect the cross-correlation at 50$σ$. Fitting this jointly with the galaxy auto-correlation power spectrum to break the galaxy bias degeneracy with $σ_8$, we perform a tomographic analysis in four LRG redshift bins spanning $0.4 \le z \le 1.0$ to constrain the amplitude of matter density fluctuations through the parameter combination $S_8^\times = σ_8 \left(Ω_m / 0.3\right)^{0.4}$. Prior to unblinding, we confirm with extragalactic simulations that foreground biases are negligible and carry out a comprehensive suite of null and consistency tests. Using a hybrid effective field theory (HEFT) model that allows scales as small as $k_{\rm max}=0.6$ $h/{\rm Mpc}$, we obtain a 3.3% constraint on $S_8^\times = σ_8 \left(Ω_m / 0.3\right)^{0.4} = 0.792^{+0.024}_{-0.028}$ from ACT data, as well as constraints on $S_8^\times(z)$ that probe structure formation over cosmic time. Our result is consistent with the early-universe extrapolation from primary CMB anisotropies measured by Planck PR4 within 1.2$σ$. Jointly fitting ACT and Planck lensing cross-correlations we obtain a 2.7% constraint of $S_8^\times = 0.776^{+0.019}_{-0.021}$, which is consistent with the Planck early-universe extrapolation within 2.1$σ$, with the lowest redshift bin showing the largest difference in mean. The latter may motivate further CMB lensing tomography analyses at $z<0.6$ to assess the impact of potential systematics or the consistency of the $Λ$CDM model over cosmic time. |
| title | The Atacama Cosmology Telescope DR6 and DESI: Structure formation over cosmic time with a measurement of the cross-correlation of CMB Lensing and Luminous Red Galaxies |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.04606 |