Article
Astronomy & Astrophysics
Samuel Brieden, Hector Gil-Marin, Licia Verde
Summary: This study measures two values of the Hubble expansion rate, H0, based on different physical processes using large-scale structure galaxy data and Big Bang Nucleosynthesis abundances information. The results show good consistency between the two H0 values obtained, which are the tightest sound-horizon free constraints from LSS data to date. Any proposed ACDM extension needs to modify consistently both the sound horizon scale physics and the matter-radiation equality scale to address the so-called Hubble tension.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Hector Gil-Marin
Summary: This study reviews different methods of combining cosmological information from the full shape of power spectra, finding that the standard approach of combining at the level of BAO variables is nearly optimal, resulting in improved constraints at a faster speed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Zvonimir Vlah, Emanuele Castorina, Martin White
Summary: In this study, a method for computing the one-loop 2-point function of biased tracers in redshift space is presented using Lagrangian perturbation theory, with a full resummation of long-wavelength displacements and velocities. The model accurately predicts the power spectrum and correlation function of halos and mock galaxies, including baryon acoustic oscillation signal damping due to bulk galaxy motions. The study also compares this full resummation approach with other techniques and discusses the computation of resulting expressions numerically for efficient computation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Atsushi Taruya, Kazuyuki Akitsu
Summary: This paper introduces a new formalism based on Lagrangian perturbation theory to systematically compute the response of a biased tracer of large-scale structure to super-sample modes. The formalism can reproduce previously derived power spectrum responses and offers an alternative way to compute statistical quantities with super-sample modes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Obinna Umeh
Summary: This study addresses the challenges of computational estimation and high-dimensionality when using the anisotropic three-point correlation function for cosmological parameter inference. By utilizing multipole decompositions to reduce dimensionality, the full expression for the multipole moments and covariance matrix of the anisotropic 3PCF can be derived effectively. Optimal computation of multipole moments and their covariance is demonstrated using the 2D FFTLog formalism, involving integrals over product terms with bispectrum, power spectra, and spherical Bessel functions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Setareh Foroozan, Alex Krolewski, Will J. Percival
Summary: While measurements of Baryonic Acoustic Oscillation (BAO) signal positions align well with Fisher matrix predictions, measurements based on Redshift Space Distortion (RSD) of the growth rate f sigma(8) do not agree with initial predictions. This discrepancy is attributed to degeneracies with geometric parameters and optimistic assumptions about the scale for extracting linear signals. Current data and large-scale modeling techniques have found a consistent signal extraction for k less than or equal to 0.08 h Mpc(-1), regardless of sample properties and covered redshifts.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Shi-Fan Chen, Zvonimir Vlah, Martin White
Summary: A new method for analyzing the pre-and post-reconstruction galaxy two-point functions of the BOSS survey is presented. The post-reconstruction correlation function accurately measures the distance-redshift relation and expansion history, while the pre-reconstruction power spectrum multipoles constrain the broad-band shape and rate-of-growth of large-scale structure. The technique uses Lagrangian perturbation theory to directly work with the measured data at the level of two-point functions without approximations. Combining galaxies across the full redshift range and both hemispheres, constraints on Omega(m), H-0, and sigma(8) are obtained that are consistent with the Planck primary CMB anisotropy data and recent cosmic shear surveys.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Setareh Foroozan, Elena Massara, Will J. Percival
Summary: The low resolution of slitless spectroscopy may lead to line misidentification in future surveys, requiring correction for contaminants to avoid incorrect cosmological measurements.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Matthew McQuinn
Summary: By studying a simplified universe model, it is found that linearized reconstruction produces similar results to the full nonlinear algorithm, indicating that existing reconstruction algorithms can extract most of the accessible information effectively. The effectiveness of reconstruction is influenced by the number of constraints, with linear scales allowing for precision below the shot noise expectation if galaxy Lagrangian displacements are sufficiently constrained.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Samuel Brieden, Hector Gil-Marin, Licia Verde
Summary: This study presents a model-agnostic analysis of galaxy and quasar clustering data, providing precise constraints on cosmological parameters and offering important references for the choice of cosmological models.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
L. Raul Abramo, Joao Vitor Dinarte Ferri, Ian Lucas Tashiro, Arthur Loureiro
Summary: This paper presents a method to predict the constraining power of galaxy surveys using the multi-tracer Fisher matrix based on angular power spectra in the linear regime of structure formation, avoiding the impracticality of deriving the Fisher matrix from numerically evaluated covariance matrices.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Emanuele Castorina, Enea Di Dio
Summary: Measurements of galaxy clustering in Fourier space provide insights into the early Universe and the effects of Primordial Non Gaussianities. Relativistic effects can complicate the interpretation of data and may diverge in the Infra-Red. This work calculates the ensemble average of a commonly used Fourier space estimator, considering all general relativistic effects. The study finds that once the individual divergent GR terms are taken into account, there is no Infra-Red sensitivity in the observable. Additionally, the importance of GR effects, including lensing magnification, in interpreting the galaxy power spectrum multipoles is investigated, revealing them to be generally small corrections to the leading redshift space distortions term.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Sheean Jolicoeur, Roy Maartens, Eline M. De Weerd, Obinna Umeh, Chris Clarkson, Stefano Camera
Summary: The study investigates the detectability of first-order relativistic effects in future 21cm intensity mapping surveys, finding that the imaginary contribution of the relativistic signal in the bispectrum increases the detection possibility, albeit typically with a lower signal-to-noise compared to Hα galaxy surveys, due to foreground and telescope beam effects.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Henry S. Grasshorn Gebhardt, Olivier Dore
Summary: In this paper, a custom eigenbasis adapted to any particular survey geometry is derived to retain all information on the diagonal of the 2-point function. It results in a diagonal 2-point function with simple shot noise and a diagonal covariance matrix in the case of a Gaussian random field. The derived basis is used to construct a 3D spherical Fourier-Bessel power spectrum estimator assuming a survey geometry that is separable in the angular and radial directions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Florian Beutler, Patrick McDonald
Summary: Recent developments in galaxy redshift surveys have led to the proposal of a matrix-based analysis framework for galaxy power spectrum multipoles, providing deconvolved power spectrum results for several datasets. The use of deconvolved power spectrum multipoles allows for a data analysis independent of survey-specific aspects, such as the window function. This alternative analysis method has been shown to yield similar results to standard analysis in the case of the BOSS dataset, with various analysis components and a Python toolbox provided for convenience.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Shadab Alam, Arnaud de Mattia, Amelie Tamone, S. Avila, John A. Peacock, V Gonzalez-Perez, Alex Smith, Anand Raichoor, Ashley J. Ross, Julian E. Bautista, Etienne Burtin, Johan Comparat, Kyle S. Dawson, Helion du Mas des Bourboux, Stephanie Escoffier, Hector Gil-Marin, Salman Habib, Katrin Heitmann, Jiamin Hou, Faizan G. Mohammad, Eva-Maria Mueller, Richard Neveux, Romain Paviot, Will J. Percival, Graziano Rossi, Vanina Ruhlmann-Kleider, Rita Tojeiro, Mariana Vargas Magana, Cheng Zhao, Gong-Bo Zhao
Summary: The study focuses on the clustering of galaxies in redshift space, using mock catalogues with various effects to analyze two RSD models providing unbiased measurements. Additionally, the estimated theoretical systematic error is found to be negligible compared to the statistical error of the sample.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Gong-Bo Zhao, Yuting Wang, Atsushi Taruya, Weibing Zhang, Hector Gil-Marin, Arnaud de Mattia, Ashley J. Ross, Anand Raichoor, Cheng Zhao, Will J. Percival, Shadab Alam, Julian E. Bautista, Etienne Burtin, Chia-Hsun Chuang, Kyle S. Dawson, Jiamin Hou, Jean-Paul Kneib, Kazuya Koyama, Helion du Mas des Bourboux, Eva-Maria Mueller, Jeffrey A. Newman, John A. Peacock, Graziano Rossi, Vanina Ruhlmann-Kleider, Donald P. Schneider, Arman Shafieloo
Summary: In this study, a joint BAO and RSD analysis was conducted using the eBOSS DR16 LRG and ELG samples, with the detection of RSD signal at approximately 4 sigma confidence level at z = 0.77. The BAO distances and growth rate were simultaneously measured at z = 0.70 and z = 0.845 based on the chained power spectrum, with the significance level of a non-zero Omega(Lambda) raised to around 11 sigma when combined with BAO measurements from other samples.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Pierre Zhang, Guido D'Amico, Leonardo Senatore, Cheng Zhao, Yifu Cai
Summary: By analyzing the Full Shape of the BOSS Correlation Function and combining it with other measurements, we have determined the present day Hubble constant, matter fraction, and parameters of the primordial power spectrum. We have also placed constraints on the total neutrino mass. These results are consistent with previous studies and show no tension or inconsistency.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Jamie Donald-McCann, Florian Beutler, Kazuya Koyama, Minas Karamanis
Summary: MATRYOSHKA is a suite of neural-network-based emulators and accompanying python package that can provide fast and accurate predictions of the non-linear galaxy power spectrum. By combining linear component emulators with a non-linear boost component emulator, it is possible to predict the real space non-linear galaxy power spectrum with high accuracy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Hector Gil-Marin
Summary: This study reviews different methods of combining cosmological information from the full shape of power spectra, finding that the standard approach of combining at the level of BAO variables is nearly optimal, resulting in improved constraints at a faster speed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Eva-Maria Mueller, Mehdi Rezaie, Will J. Percival, Ashley J. Ross, Rossana Ruggeri, Hee-Jong Seo, Hector Gil-Marin, Julian Bautista, Joel R. Brownstein, Kyle Dawson, Axel de la Macorra, Nathalie Palanque-Delabrouille, Graziano Rossi, Donald P. Schneider, Christophe Yeche
Summary: This study presents measurements of the local primordial non-Gaussianity parameter f(NL)(local) from the clustering of 343,708 quasars. The analysis is performed in Fourier space and demonstrates the robustness of the analysis pipeline. The results indicate that the impact of systematics is minor and applying redshift weighting techniques improves the results by 37%.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Marie Aubert, Marie-Claude Cousinou, Stephanie Escoffier, Adam J. Hawken, Seshadri Nadathur, Shadab Alam, Julian Bautista, Etienne Burtin, Chia-Hsun Chuang, Axel de la Macorra, Arnaud de Mattia, Hector Gil-Marin, Jiamin Hou, Eric Jullo, Jean-Paul Kneib, Richard Neveux, Graziano Rossi, Donald Schneider, Alex Smith, Amelie Tamone, Mariana Vargas Magana, Cheng Zhao
Summary: In this study, we present a void clustering analysis in configuration-space using the completed SDSS-IV eBOSS DR16 samples. Our results reveal the redshift space distortions around voids and provide measurements of the distortion parameter and growth rate for different samples in the redshift range 0.6 < z < 2.2.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Review
Astronomy & Astrophysics
Elcio Abdalla, Guillermo Franco Abellan, Amin Aboubrahim, Adriano Agnello, Ozgur Akarsu, Yashar Akrami, George Alestas, Daniel Aloni, Luca Amendola, Luis A. Anchordoqui, Richard I. Anderson, Nikki Arendse, Marika Asgari, Mario Ballardini, Vernon Bargerx, Spyros Basilakos, Ronaldo C. Batista, Elia S. Battistelli, Richard Battye, Micol Benetti, David Benisty, Asher Berlin, Paolo de Bernardis, Emanuele Berti, Bohdan Bidenko, Simon Birrer, John P. Blakeslee, Kimberly K. Boddy, Clecio R. Bom, Alexander Bonilla, Nicola Borghi, Francois R. Bouchet, Matteo Braglia, Thomas Buchert, Elizabeth Buckley-Geer, Erminia Calabrese, Robert R. Caldwell, David Camarena, Salvatore Capozziello, Stefano Casertano, Angela Chen, Geoff C-F Chen, Hsin-Yu Chen, Jens Chluba, Anton Chudaykin, Michele Cicoli, Craig J. Copi, Fred Courbin, Francis-Yan Cyr-Racine, Bozena Czerny, Maria Dainotti, Guido D'Amico, Anne-Christine Davis, Javier de Cruz Perez, Jaume de Haro, Jacques Delabrouille, Peter B. Denton, Suhail Dhawan, Keith R. Dienes, Eleonora Di Valentino, Pu Du, Dominique Eckert, Celia Escamilla-Rivera, Agnes Ferte, Fabio Finelli, Pablo Fosalba, Wendy L. Freedman, Noemi Frusciante, Enrique Gaztanaga, William Giare, Elena Giusarma, Adria Gomez-Valent, Will Handley, Ian Harrison, Luke Hart, Dhiraj Kumar Hazra, Alan Heavens, Asta Heinesen, Hendrik Hildebrandt, J. Colin Hill, Natalie B. Hogg, Daniel E. Holz, Deanna C. Hooper, Nikoo Hosseininejad, Dragan Huterer, Mustapha Ishak, Mikhail M. Ivanov, Andrew H. Jaffe, In Sung Jang, Karsten Jedamzik, Raul Jimenez, Melissa Joseph, Shahab Joudaki, Marc Kamionkowski, Tanvi Karwal, Lavrentios Kazantzidis, Ryan E. Keeley, Michael Klasen, Eiichiro Komatsu, Leon V. E. Koopmans, Suresh Kumar, Luca Lamagna, Ruth Lazkoz Dn, Chung-Chi Lee, Julien Lesgourgues, Jackson Levi Said, Tiffany R. Lewis, Benjamin L'Huillier, Matteo Lucca, Roy Maartens, Lucas M. Macri, Danny Marfatia, Valerio Marra, Carlos J. A. P. Martins, Silvia Masi, Sabino Matarrese, Arindam Mazumdar, Alessandro Melchiorri, Olga Mena, Laura Mersini-Houghton, James Mertens, Dinko Milakovic, Yuto Minami, Vivian Miranda, Cristian Moreno-Pulido, Michele Moresco, David F. Mota, Emil Mottola, Simone Mozzon, Jessica Muir, Ankan Mukherjee, Suvodip Mukherjee, Pavel Naselsky, Pran Nath, Savvas Nesseris, Florian Niedermann, Alessio Notari, Rafael C. Nunes, Eoin O. Colgain, Kayla A. Owens, Emre Ozulker, Francesco Pace, Andronikos Paliathanasis, Antonella Palmese, Supriya Pan, Daniela Paoletti, Santiago E. Perez Bergliaffa, Leandros Perivolaropoulos, Dominic W. Pesce, Valeria Pettorino, Oliver H. E. Philcox, Levon Pogosian, Vivian Poulin, Gaspard Poulot, Marco Raveri, Mark J. Reid, Fabrizio Renzi, Adam G. Riess, Vivian Sabla, Paolo Salucci, Vincenzo Salzano, Emmanuel N. Saridakis, Bangalore S. Sathyaprakash, Martin Schmaltz, Nils Schoneberg, Dan Scolnic, Anjan A. Sen, Neelima Sehgal, Arman Shafieloo, M. M. Sheikh-Jabbari, Joseph Silk, Alessandra Silvestri, Foteini Skaraj, Martin S. Sloth, Marcelle Soares-Santos, Joan Sola Peracaula, Yu-Yang Songsheng, Jorge F. Soriano, Denitsa Staicova, Glenn D. Starkman, Istvan Szapudi, Elsa M. Teixeira, Brooks Thomas, Tommaso Treu, Emery Trott, Carsten van de Ruck, J. Alberto Vazquez, Licia Verde, Luca Visinelli, Deng Wang, Jian-Min Wang, Shao-Jiang Wang, Richard Watkins, Scott Watson, John K. Webb, Neal Weiner, Amanda Weltman, Samuel J. Witte, Radoslaw Wojtak, Anil Kumar Yadav, Weiqiang Yang, Gong-Bo Zhao, Miguel Zumalacarregui
Summary: The paper discusses the limitations of the standard Lambda Cold Dark Matter (Lambda CDM) cosmological model and proposes new physics models to alleviate the tensions in various cosmological measurements. The authors emphasize the importance of considering a wide range of data and discuss the significance of upcoming experiments and space missions in addressing open questions in cosmology.
JOURNAL OF HIGH ENERGY ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Michael J. Chapman, Faizan G. Mohammad, Zhongxu Zhai, Will J. Percival, Jeremy L. Tinker, Julian E. Bautista, Joel R. Brownstein, Etienne Burtin, Kyle S. Dawson, Hector Gil-Marin, Axel de la Macorra, Ashley J. Ross, Graziano Rossi, Donald P. Schneider, Gong-Bo Zhao
Summary: In this study, we measured the small-scale clustering of the Data Release 16 extended Baryon Oscillation Spectroscopic Survey Luminous Red Galaxy sample using corrected weights. We used a cosmological emulator to fit the growth rate of cosmic structure and the amplitude of the halo velocity field, finding results that are inconsistent with the expectations from previous data. The precision achieved in this study is higher than previous measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
B. Abareshi, J. Aguilar, S. Ahlen, Shadab Alam, David M. Alexander, R. Alfarsy, L. Allen, C. Allende Prieto, O. Alves, J. Ameel, E. Armengaud, J. Asorey, Alejandro Aviles, S. Bailey, A. Balaguera-Antolinez, O. Ballester, C. Baltay, A. Bault, S. F. Beltran, B. Benavides, S. BenZvi, A. Berti, R. Besuner, Florian Beutler, D. Bianchi, C. Blake, P. Blanc, R. Blum, A. Bolton, S. Bose, D. Bramall, S. Brieden, A. Brodzeller, D. Brooks, C. Brownewell, E. Buckley-Geer, R. N. Cahn, Z. Cai, R. Canning, R. Capasso, A. Carnero Rosell, P. Carton, R. Casas, F. J. Castander, J. L. Cervantes-Cota, S. Chabanier, E. Chaussidon, C. Chuang, C. Circosta, S. Cole, A. P. Cooper, L. da Costa, M-C Cousinou, A. Cuceu, T. M. Davis, K. Dawson, R. De la Cruz-Noriega, A. de la Macorra, A. de Mattia, J. Della Costa, P. Demmer, M. Derwent, A. Dey, B. Dey, G. Dhungana, Z. Ding, C. Dobson, P. Doel, J. Donald-McCann, J. Donaldson, K. Douglass, Y. Duan, P. Dunlop, J. Edelstein, S. Eftekharzadeh, D. J. Eisenstein, M. Enriquez-Vargas, S. Escoffier, M. Evatt, P. Fagrelius, X. Fan, K. Fanning, V. A. Fawcett, S. Ferraro, J. Ereza, B. Flaugher, A. Font-Ribera, J. E. Forero-Romero, C. S. Frenk, S. Fromenteau, B. T. Gansicke, C. Garcia-Quintero, L. Garrison, E. Gaztanaga, F. Gerardi, H. Gil-Marin, S. Gontcho A. Gontcho, Alma X. Gonzalez-Morales, G. Gonzalez-de-Rivera, V Gonzalez-Perez, C. Gordon, O. Graur, D. Green, C. Grove, D. Gruen, G. Gutierrez, J. Guy, C. Hahn, S. Harris, D. Herrera, Hiram K. Herrera-Alcantar, K. Honscheid, C. Howlett, D. Huterer, V Irsic, M. Ishak, P. Jelinsky, L. Jiang, J. Jimenez, Y. P. Jing, R. Joyce, E. Jullo, S. Juneau, N. G. Karacayli, M. Karamanis, A. Karcher, T. Karim, R. Kehoe, S. Kent, D. Kirkby, T. Kisner, F. Kitaura, S. E. Koposov, A. Kovacs, A. Kremin, Alex Krolewski, B. L'Huillier, O. Lahav, A. Lambert, C. Lamman, Ting-Wen Lan, M. Landriau, S. Lane, D. Lang, J. U. Lange, J. Lasker, L. Le Guillou, A. Leauthaud, A. Le Van Suu, Michael E. Levi, T. S. Li, C. Magneville, M. Manera, Christopher J. Manser, B. Marshall, Paul Martini, W. McCollam, P. McDonald, Aaron M. Meisner, J. Mena-Fernandez, J. Meneses-Rizo, M. Mezcua, T. Miller, R. Miquel, P. Montero-Camacho, J. Moon, J. Moustakas, E. Mueller, Andrea Munoz-Gutierrez, Adam D. Myers, S. Nadathur, J. Najita, L. Napolitano, E. Neilsen, Jeffrey A. Newman, J. D. Nie, Y. Ning, G. Niz, P. Norberg, Hernan E. Noriega, T. O'Brien, A. Obuljen, N. Palanque-Delabrouille, A. Palmese, P. Zhiwei, D. Pappalardo, X. Peng, W. J. Percival, S. Perruchot, R. Pogge, C. Poppett, A. Porredon, F. Prada, J. Prochaska, R. Pucha, A. Perez-Fernandez, I Perez-Rafols, D. Rabinowitz, A. Raichoor, S. Ramirez-Solano, Cesar Ramirez-Perez, C. Ravoux, K. Reil, M. Rezaie, A. Rocher, C. Rockosi, N. A. Roe, A. Roodman, A. J. Ross, G. Rossi, R. Ruggeri, V Ruhlmann-Kleider, C. G. Sabiu, S. Safonova, K. Said, A. Saintonge, Javier Salas Catonga, L. Samushia, E. Sanchez, C. Saulder, E. Schaan, E. Schlafly, D. Schlegel, J. Schmoll, D. Scholte, M. Schubnell, A. Secroun, H. Seo, S. Serrano, Ray M. Sharples, Michael J. Sholl, Joseph Harry Silber, D. R. Silva, M. Sirk, M. Siudek, A. Smith, D. Sprayberry, R. Staten, B. Stupak, T. Tan, Gregory Tarle, Suk Sien Tie, R. Tojeiro, L. A. Urena-Lopez, F. Valdes, O. Valenzuela, M. Valluri, M. Vargas-Magana, L. Verde, M. Walther, B. Wang, M. S. Wang, B. A. Weaver, C. Weaverdyck, R. Wechsler, Michael J. Wilson, J. Yang, Y. Yu, S. Yuan, Christophe Yeche, H. Zhang, K. Zhang, Cheng Zhao, Rongpu Zhou, Zhimin Zhou, H. Zou, J. Zou, S. Zou, Y. Zu
Summary: The Dark Energy Spectroscopic Instrument (DESI) is a 5-year survey aimed at exploring the nature of dark energy through spectroscopic measurements of 40 million galaxies and quasars. It has been successfully installed and has achieved all of its performance goals.
ASTRONOMICAL JOURNAL
(2022)
Correction
Astronomy & Astrophysics
Seshadri Nadathur, Alex Woodfinden, Will J. Percival, Marie Aubert, Julian Bautista, Kyle Dawson, Stephanie Escoffier, Sebastien Fromenteau, Hector Gil-Marin, James Rich, Ashley J. Ross, Graziano Rossi, Mariana Vargas Magana, Joel R. Brownstein, Donald P. Schneider
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Enrique Paillas, Carolina Cuesta-Lazaro, Pauline Zarrouk, Yan-Chuan Cai, Will J. Percival, Seshadri Nadathur, Mathilde Pinon, Arnaud de Mattia, Florian Beutler
Summary: The dependence of galaxy clustering on local density can extract non-Gaussian information from galaxy surveys. The density-split clustering (DS) method combines clustering statistics from regions of different environmental density and provides more precise constraints on the parameters of the nu?CDM model compared to the two-point correlation function (2PCF). DS improves the constraints on various cosmological parameters and can recover lost information when using redshift-space halo positions to estimate the environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Guido D' Amico, Nemanja Kaloper
Summary: The article discusses the relationship between Penrose's views on the origin of the universe and inflation theory, arguing that they are actually consistent. Using the example of power law inflation, it is shown that the initial singularity conditions meet Penrose's criteria and break T-reversal, determining the arrow of time.
Article
Astronomy & Astrophysics
Guido D. Amico, Nemanja Kaloper, Alexander Westphal
Summary: This study revisits the roller-coaster cosmology based on multiple stages of monodromy inflation and investigates its consistency with cosmic microwave background and gravity wave observations. The study finds that, after taking into account the strong coupling corrections, the modified model can be consistent with the observational data.