Article
Astronomy & Astrophysics
Yue Nan, Kazuhiro Yamamoto
Summary: In this study, a dynamical model for dark energy based on an ultralight mass scalar field with large-scale inhomogeneities is considered. The model is found to have observable impacts on the anisotropic properties of the cosmic microwave background (CMB) intensity and luminosity distance. Numerical solutions show that the model can mimic the standard ΛCDM cosmology, including spatially dependent dark energy with flexible ranges of model parameters. Constraints on the amplitude of these inhomogeneities are also put forward through observations of the CMB anisotropies, along with discussions on their influence on the estimation of the luminosity distance.
Article
Astronomy & Astrophysics
Shang Li, Ji-Ping Dai, Xiu-Hui Tan, Yang-Jie Yan, Jun-Qing Xia
Summary: The bounce scenario in cosmology is a research topic that addresses the singularity problem and trans-Planckian issue left by the standard inflationary theory. In this work, the authors extend the analysis to large-scale structure measurements and find that the model parameters can be constrained effectively. The constraints become even stronger when combined with the measurements from the Planck satellite.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Physics, Particles & Fields
Kamal Bora, R. F. L. Holanda, Shantanu Desai
Summary: A new method is proposed to explore a possible departure from the standard time evolution law for dark matter density, using a deformed evolution law and constraining epsilon. The dataset used includes Strong Gravitational Lensing data and galaxy cluster X-ray gas mass fraction measurements, showing that the current dataset cannot rule out interacting models of dark matter and dark energy with high confidence level.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Fulvio Ferlito, Sunny Vagnozzi, David F. Mota, Marco Baldi
Summary: In this study, we investigate the non-linear effects of scattering between dark energy and baryons on the formation of cosmic structures. Using large N-body simulations, we find that the signatures of this scattering in the non-linear regime are significantly larger than in the linear regime, and could potentially be constrained through a combination of observables.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
William McDonald, Danail Obreschkow, Lilian Garratt-Smithson
Summary: This paper introduces a new dissociation index to compare the relationship between cold dark matter and gas in cosmic large-scale structures. The study finds that 90% of galaxy clusters have dark matter more elongated than gas, consistent with observations. Through simulations of colliding gaseous dark matter haloes, the details of dissociation process are further explored.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Cristhian Garcia, Camilo Santa, Antonio Enea Romano
Summary: This article introduces the use of convolutional neural networks to solve the inversion problem of the large-scale structure of the Universe. By observing the luminosity distance of Supernovae Ia, the researchers can reconstruct the large-scale structure. The results show that the velocity field inversion is more accurate than the density field.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Eleni Tsaprazi, Jens Jasche, Ariel Goobar, Hiranya Peiris, Igor Andreoni, Michael W. Coughlin, Christoffer U. Fremling, Matthew J. Graham, Mansi Kasliwal, Shri R. Kulkarni, Ashish A. Mahabal, Reed Riddle, Jesper Sollerman, Anastasios Tzanidakis
Summary: The new generation of wide-field time-domain surveys has enabled the study of clustering of supernova host galaxies in the large-scale structure for the first time. The research found that supernovae exhibit high significance clustering and their distribution in the LSS is consistent with that of SDSS galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Matteo Cataneo, Cora Uhlemann, Christian Arnold, Alex Gough, Baojiu Li, Catherine Heymans
Summary: In this study, an analytical description of the probability distribution function (PDF) of the smoothed 3D matter density field for modified gravity and dark energy is presented. The approach is based on Large Deviations Theory and is applicable to various extensions of the standard cosmology. The results show high accuracy in the mildly non-linear regime and demonstrate the power of combining measurements of the 3D matter PDF with the 3D matter power spectrum.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Ginevra Favole, Benjamin R. Granett, Javier Silva Lafaurie, Domenico Sapone
Summary: The study investigates the jackknife method for internal covariance estimation in large-scale structure surveys, exploring the impact of jackknife size and number of resamplings on the precision of the covariance estimate and errors in cosmological parameters. Results show that the baryon acoustic scale error estimate is independent of the jackknife scale, while the shift parameter a exhibits variations in error estimates from different datasets.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Anand Raichoor, Arnaud de Mattia, Ashley J. Ross, Cheng Zhao, Shadab Alam, Santiago Avila, Julian Bautista, Jonathan Brinkmann, Joel R. Brownstein, Etienne Burtin, Michael J. Chapman, Chia-Hsun Chuang, Johan Comparat, Kyle S. Dawson, Arjun Dey, Helion du Mas des Bourboux, Jack Elvin-Poole, Violeta Gonzalez-Perez, Claudio Gorgoni, Jean-Paul Kneib, Hui Kong, Dustin Lang, John Moustakas, Adam D. Myers, Eva-Maria Mueller, Seshadri Nadathur, Jeffrey A. Newman, Will J. Percival, Mehdi Rezaie, Graziano Rossi, Vanina Ruhlmann-Kleider, David J. Schlegel, Donald P. Schneider, Hee-Jong Seo, Amelie Tamone, Jeremy L. Tinker, Rita Tojeiro, M. Vivek, Christophe Yeche, Gong-Bo Zhao
Summary: This paper presents the Emission Line Galaxy (ELG) sample of the extended Baryon Oscillation Spectroscopic Survey, describing observations, redshift measurements, and large-scale structure catalogues used for cosmological analysis. A spherically averaged baryon acoustic oscillations (BAO) measurement in configuration space shows consistency with the BAO feature, providing a 3.2% measurement of the spherically averaged BAO distance at an effective redshift of 0.845.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Koki Yamashita, Yue Nan, Yuuki Sugiyama, Kazuhiro Yamamoto
Summary: This paper investigates a cosmological model with random inhomogeneities and anisotropies on large scales and explores their impact on the formation of the large-scale structure of the Universe. By solving the cosmological perturbation equations, the researchers find that the model is consistent with observations.
Article
Astronomy & Astrophysics
Cheng-Zong Ruan, Carolina Cuesta-Lazaro, Alexander Eggemeier, Cesar Hernandez-Aguayo, Carlton M. Baugh, Baojiu Li, Francisco Prada
Summary: The upcoming generation of galaxy surveys will allow us to test cosmological models with higher precision. To achieve this, more accurate theoretical predictions are needed. In this study, we investigate the validity of the Skew-T (ST) probability distribution function (PDF) of halo pairwise peculiar velocities in modified gravity cosmologies to improve small-scale predictions.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Xiaoyun Shao, Zhoujian Cao, Xilong Fan, Shichao Wu
Summary: Improvements in the sensitivity of the gravitational wave network have enabled third-generation GW detectors to independently detect the large-scale structure of the universe through the clustering of binary black holes. The large redshifts of GW events make black hole catalogs a better choice than galaxy catalogs to probe the large-scale structure and cosmic evolution. Using the sky position of BBHs observed by third-generation GW detectors, we calculated the angular correlation function and bias factor of the BBH population, providing an independent method to understand the formation mechanisms and origin of BBH mergers.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Bryan R. Scott, Kirit S. Karkare, Simeon Bird
Summary: We investigate the potential of using line intensity mapping (LIM) of CO(1-0), CO(2-1), and CO(3-2) transitions to detect deviations from General Relativity in the framework of Horndeski's theories. Our analysis suggests that a mm-wave LIM experiment would need a total spectrometre-hours of about 10(8)-10(9) to achieve constraints on certain parameters. Such constraints would be competitive or even tighter than existing constraints from the CMB and LSS. Our modelling code is publicly available.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Sara Konrad, Yonadav Barry Ginat, Matthias Bartelmann
Summary: We study the small-scale asymptotic behaviour of the cold dark matter density fluctuation power spectrum in the Zel'dovich approximation and derive an asymptotic series dominated by a k(-3) tail. Our results are important for understanding perturbative terms in kinetic field theory and the non-linear power spectrum, as well as the sensitivity of small-scale behaviour to the spectral index.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Amon, N. C. Robertson, H. Miyatake, C. Heymans, M. White, J. DeRose, S. Yuan, R. H. Wechsler, T. N. Varga, S. Bocquet, A. Dvornik, S. More, A. J. Ross, H. Hoekstra, A. Alarcon, M. Asgari, J. Blazek, A. Campos, R. Chen, A. Choi, M. Crocce, H. T. Diehl, C. Doux, K. Eckert, J. Elvin-Poole, S. Everett, A. Ferte, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, W. G. Hartley, K. Herner, H. Hildebrandt, S. Huang, E. M. Huff, B. Joachimi, S. Lee, N. MacCrann, J. Myles, A. Navarro-Alsina, T. Nishimichi, J. Prat, L. F. Secco, I Sevilla-Noarbe, E. Sheldon, T. Shin, T. Troster, M. A. Troxel, I Tutusaus, A. H. Wright, B. Yin, M. Aguena, S. Allam, J. Annis, D. Bacon, M. Bilicki, D. Brooks, D. L. Burke, A. Carnero Rosell, J. Carretero, F. J. Castander, R. Cawthon, M. Costanzi, L. N. da Costa, M. E. S. Pereira, J. de Jong, J. De Vicente, S. Desai, J. P. Dietrich, P. Doel, I Ferrero, J. Frieman, J. Garcia-Bellido, D. W. Gerdes, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. Huterer, A. Kannawadi, K. Kuehn, N. Kuropatkin, O. Lahav, M. Lima, M. A. G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, J. J. Mohr, R. Morgan, J. Muir, F. Paz-Chinchon, A. Pieres, A. A. Plazas Malagon, A. Porredon, M. Rodriguez-Monroy, A. Roodman, E. Sanchez, S. Serrano, H. Shan, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, C. To, Y. Zhang
Summary: We evaluate the consistency between lensing and clustering by combining measurements from Baryon Oscillation Spectroscopic Survey, DES Year 3, HSC Year 1, and KiDS-1000. Good agreement is found between these lensing data sets. Two fixed cosmologies, Planck and Lensing cosmology, are used to fit the data, and both provide an acceptable fit at large scales. However, uncertainties in baryon feedback and assembly bias hinder the full utilization of small-scale measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Rongpu Zhou, Biprateep Dey, Jeffrey A. Newman, Daniel J. Eisenstein, K. Dawson, S. Bailey, A. Berti, J. Guy, Ting-Wen Lan, H. Zou, J. Aguilar, S. Ahlen, Shadab Alam, D. Brooks, A. de la Macorra, A. Dey, G. Dhungana, K. Fanning, A. Font-Ribera, S. Gontcho A. Gontcho, K. Honscheid, Mustapha Ishak, T. Kisner, A. Kovacs, A. Kremin, M. Landriau, Michael E. Levi, C. Magneville, Marc Manera, P. Martini, Aaron M. Meisner, R. Miquel, J. Moustakas, Adam D. Myers, Jundan Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, A. Raichoor, A. J. Ross, E. Schlafly, D. Schlegel, M. Schubnell, Gregory Tarle, B. A. Weaver, R. H. Wechsler, Christophe Yeche, Zhimin Zhou
Summary: The Dark Energy Spectroscopic Instrument (DESI) is conducting a five-year survey to measure the redshifts of tens of millions of galaxies and quasars. The DESI LRG sample, selected using photometry data from the DESI Legacy Imaging Surveys, shows high robustness against imaging systematics. The sample has a higher density compared to previous surveys and has a high success rate in obtaining confident redshifts.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
M. Bonici, C. Carbone, S. Davini, P. Vielzeuf, L. Paganin, V. Cardone, N. Hamaus, A. Pisani, A. J. Hawken, A. Kovacs, S. Nadathur, S. Contarini, G. Verza, I. Tutusaus, F. Marulli, L. Moscardini, M. Aubert, C. Giocoli, A. Pourtsidou, S. Camera, S. Escoffier, A. Caminata, S. Di Domizio, M. Martinelli, M. Pallavicini, V. Pettorino, Z. Sakr, D. Sapone, G. Testera, S. Tosi, V. Yankelevich, A. Amara, N. Auricchio, M. Baldi, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, V. Capobianco, J. Carretero, M. Castellano, S. Cavuoti, R. Cledassou, G. Congedo, L. Conversi, Y. Copin, L. Corcione, F. Courbin, M. Cropper, A. Da Silva, H. Degaudenzi, M. Douspis, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, A. Ealet, S. Farrens, S. Ferriol, P. Fosalba, M. Frailis, E. Franceschi, M. Fumana, P. Gomez-Alvarez, B. Garilli, B. Gillis, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, W. Holmes, F. Hormuth, A. Hornstrup, K. Jahnke, M. Kuemmel, S. Kermiche, A. Kiessling, M. Kilbinger, M. Kunz, H. Kurki-Suonio, R. Laureijs, S. Ligori, P. B. Lilje, I. Lloro, E. Maiorano, O. Mansutti, O. Marggraf, K. Markovic, R. Massey, E. Medinaceli, M. Melchior, M. Meneghetti, G. Meylan, M. Moresco, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, S. Pires, G. Polenta, M. Poncet, L. Popa, F. Raison, R. Rebolo, A. Renzi, J. Rhodes, E. Rossetti, R. Saglia, B. Sartoris, M. Scodeggio, A. Secroun, G. Seidel, C. Sirignano, G. Sirri, L. Stanco, J. -L. Starck, C. Surace, P. Tallada-Crespi, D. Tavagnacco, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, E. A. Valentijn, L. Valenziano, Y. Wang, J. Weller, G. Zamorani, J. Zoubian, S. Andreon
Summary: The Euclid space telescope will survey cosmic voids using galaxy samples and estimate its performance in utilizing photometric void clustering, galaxy weak lensing, and their cross-correlation. The study finds that the inclusion of the void-lensing cross-correlation signal enhances parameter constraints and improves the joint void clustering and galaxy lensing figure of merit. When combined with spectroscopic galaxy clustering, the study shows that the FoM increases significantly. The conclusion suggests that photometric void clustering and its cross-correlation with galaxy lensing should be utilized in the data analysis of the Euclid galaxy survey to improve its constraining power.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Ting-Wen Lan, R. Tojeiro, E. Armengaud, J. Xavier Prochaska, T. M. Davis, David M. Alexander, A. Raichoor, Rongpu Zhou, Christophe Yeche, C. Balland, S. BenZvi, A. Berti, R. Canning, A. Carr, H. Chittenden, S. Cole, M. -C. Cousinou, K. Dawson, Biprateep Dey, K. Douglass, A. Edge, S. Escoffier, A. Glanville, S. Gontcho Gontcho, J. Guy, C. Hahn, C. Howlett, Ho Seong Hwang, L. Jiang, A. Kovacs, M. Mezcua, S. Moore, S. Nadathur, M. Oh, D. Parkinson, A. Rocher, A. J. Ross, V. Ruhlmann-Kleider, C. G. Sabiu, K. Said, C. Saulder, D. Sierra-Porta, B. Weiner, J. Yu, P. Zarrouk, Y. Zhang, H. Zou, S. Ahlen, S. Bailey, D. Brooks, A. P. Cooper, A. de la Macorra, A. Dey, G. Dhungana, P. Doel, S. Eftekharzadeh, K. Fanning, A. Font-Ribera, L. Garrison, E. Gaztanaga, R. Kehoe, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, Michael E. Levi, C. Magneville, Aaron M. Meisner, R. Miquel, J. Moustakas, Adam D. Myers, Jeffrey A. Newman, J. D. Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, M. Schubnell, Gregory Tarle, B. A. Weaver, K. Zhang, Zhimin Zhou
Summary: The Dark Energy Spectroscopic Instrument (DESI) Survey validated its survey design and target selections by obtaining spectroscopic measurements of approximately 2500 bright galaxies, 3500 luminous red galaxies (LRGs), and 10,000 emission-line galaxies (ELGs). The results show that the final survey design produces samples of bright galaxies, LRGs, and ELGs with purity greater than 99%. The precision of the redshift measurements is approximately 10 km/s for bright galaxies and ELGs and approximately 40 km/s for LRGs.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
J. Guy, S. Bailey, A. Kremin, Shadab Alam, D. M. Alexander, C. Allende Prieto, S. BenZvi, A. S. Bolton, D. Brooks, E. Chaussidon, A. P. Cooper, K. Dawson, A. de la Macorra, A. Dey, Biprateep Dey, G. Dhungana, D. J. Eisenstein, A. Font-Ribera, J. E. Forero-Romero, E. Gaztanaga, S. Gontcho A. Gontcho, D. Green, K. Honscheid, M. Ishak, R. Kehoe, D. Kirkby, T. Kisner, Sergey E. Koposov, Ting-Wen Lan, M. Landriau, L. Le Guillou, Michael E. Levi, C. Magneville, Christopher J. Manser, P. Martini, Aaron M. Meisner, R. Miquel, J. Moustakas, Adam D. Myers, Jeffrey A. Newman, Jundan Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, A. Raichoor, C. Ravoux, A. J. Ross, E. F. Schlafly, D. Schlegel, M. Schubnell, Ray M. Sharples, Gregory Tarle, B. A. Weaver, Christophe Yeche, Rongpu Zhou, Zhimin Zhou, H. Zou
Summary: The Dark Energy Spectroscopic Instrument (DESI) is a purpose-built instrument on the 4 m Mayall Telescope at Kitt Peak National Observatory for conducting a redshift survey. With a spectroscopic data processing pipeline, DESI generates wavelength- and flux-calibrated spectra, spectroscopic classifications, and redshift measurements. The pipeline has exceeded the project's requirements for redshift performance, achieving a purity greater than 99% for all target classes.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
ChangHoon Hahn, Michael J. Wilson, Omar Ruiz-Macias, Shaun Cole, David H. Weinberg, John Moustakas, Anthony Kremin, Jeremy L. Tinker, Alex Smith, Risa H. Wechsler, Steven Ahlen, Shadab Alam, Stephen Bailey, David Brooks, Andrew P. Cooper, Tamara M. Davis, Kyle Dawson, Arjun Dey, Biprateep Dey, Sarah Eftekharzadeh, Daniel J. Eisenstein, Kevin Fanning, Jaime E. Forero-Romero, Carlos S. Frenk, Enrique Gaztanaga, Satya Gontcho Gontcho, Julien Guy, Klaus Honscheid, Mustapha Ishak, Stephanie Juneau, Robert Kehoe, Theodore Kisner, Ting-Wen Lan, Martin Landriau, Laurent Le Guillou, Michael E. Levi, Christophe Magneville, Paul Martini, Aaron Meisner, Adam D. Myers, Jundan Nie, Peder Norberg, Nathalie Palanque-Delabrouille, Will J. Percival, Claire Poppett, Francisco Prada, Anand Raichoor, Ashley J. Ross, Sasha Safonova, Christoph Saulder, Eddie Schlafly, David Schlegel, David Sierra-Porta, Gregory Tarle, Benjamin A. Weaver, Christophe Yeche, Pauline Zarrouk, Rongpu Zhou, Zhimin Zhou, Hu Zou
Summary: In the next 5 years, DESI will conduct the first Stage IV dark energy galaxy survey using 10 spectrographs with 5000 fibers on the 4 m Mayall Telescope. The DESI Bright Galaxy Survey will produce a detailed map of the universe during the dark-energy-dominated epoch, covering a large area with high redshifts. The final target selection and survey design for the BGS have been presented and validated.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
A. Raichoor, J. Moustakas, Jeffrey A. Newman, T. Karim, S. Ahlen, Shadab Alam, S. Bailey, D. Brooks, K. Dawson, A. de la Macorra, A. de Mattia, A. Dey, Biprateep Dey, G. Dhungana, S. Eftekharzadeh, D. J. Eisenstein, K. Fanning, A. Font-Ribera, J. Garcia-Bellido, E. Gaztanaga, S. Gontcho A. Gontcho, J. Guy, K. Honscheid, M. Ishak, R. Kehoe, T. Kisner, Anthony Kremin, Ting-Wen Lan, M. Landriau, L. Le Guillou, Michael E. Levi, C. Magneville, M. Manera, P. Martini, Aaron M. Meisner, Adam D. Myers, Jundan Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, A. J. Ross, V. Ruhlmann-Kleider, C. G. Sabiu, E. F. Schlafly, D. Schlegel, Gregory Tarle, B. A. Weaver, Christophe Yeche, Rongpu Zhou, Zhimin Zhou, H. Zou
Summary: The Dark Energy Spectroscopic Instrument (DESI) will collect approximately 40 million extragalactic redshifts to precisely constrain cosmic expansion and the growth of structure. It will cover about 80% of cosmic history and one-third of the sky. The Emission Line galaxy (ELG) sample, which comprises one-third of all DESI tracers, will be used to probe the universe within the 0.6 < z < 1.6 range, with the tightest constraints expected in the 1.1 < z < 1.6 range. The target selection for the DESI Survey Validation (SV) and Main Survey ELG samples relies on imaging from the Legacy Surveys.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Zhongxu Zhai, Will J. Percival, Hong Guo
Summary: We measure and analyze the clustering properties of BOSS galaxies and investigate their dependence on various properties such as luminosity, color, age, stellar mass, and star formation rate. The clustering dependence is consistent with previous results, showing that brighter, redder, older, more massive, and quenched galaxies are more strongly clustered. Moreover, we find that the galaxy clustering also depends on the look-back formation time, but has little dependence on metallicity. Additionally, through simulation-based modeling, we demonstrate that cosmological inference using small-scale clustering measurements is robust to changes in the catalog selection.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alex Woodfinden, Will J. Percival, Seshadri Nadathur, Hans A. Winther, T. S. Fraser, Elena Massara, Enrique Paillas, Sladana Radinovic
Summary: We analyze measurements from the Sloan Digital Sky Survey (SDSS) Main Galaxy Sample (MGS), Baryon Oscillation Spectroscopic Survey (BOSS), and extended BOSS (eBOSS) luminous red galaxy catalogues to draw cosmological implications. Through measurements of void-galaxy and galaxy-galaxy clustering, we obtain tight constraints on key parameters of cosmological models. Moreover, combining these results with measurements from the cosmic microwave background (CMB) and supernovae (SN) further improves the constraints on these parameters.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
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
Lucas Napolitano, Agnesh Pandey, Adam D. Myers, Ting-Wen Lan, Abhijeet Anand, Jessica Aguilar, Steven Ahlen, David M. Alexander, David Brooks, Rebecca Canning, Chiara Circosta, Axel de la Macorra, Peter Doel, Sarah Eftekharzadeh, Victoria A. Fawcett, Andreu Font-Ribera, Juan Garcia-Bellido, Satya Gontcho, L. Le Guillou, Julien Guy, Klaus Honscheid, Stephanie Juneau, T. Kisner, Martin Landriau, Aaron M. Meisner, Ramon Miquel, J. Moustakas, Will J. Percival, J. Xavier Prochaska, Michael Schubnell, Gregory Tarle, B. A. Weaver, Benjamin Weiner, Zhimin Zhou, Hu Zou, Siwei Zou
Summary: We have detected Magnesium II (Mg ii) absorbers through the early data release of the Dark Energy Spectroscopic Instrument (DESI). Our analysis shows that DESI will be able to observe over 99% of the approximately 3 million quasars (QSOs) at redshifts greater than z > 0.3, allowing for the detection of associated or intervening Mg ii absorbers. The resulting catalog of Mg ii absorbers will provide valuable information on circumgalactic medium environments, intervening galaxies, and the growth of metallicity across a wide redshift range.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
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Summary: This study investigates the cosmological constraints that can be obtained from the cross-correlation measurement of cosmic voids identified in the Euclid spectroscopic survey. The study finds that Euclid voids can accurately constrain the ratio of the transverse comoving distance and Hubble distance, as well as the growth rate, with high precision. Moreover, voids alone can provide precise measurements of the matter density parameter and the dark energy equation of state.
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(2023)
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Astronomy & Astrophysics
Boryana Hadzhiyska, A. Font-Ribera, A. Cuceu, S. Chabanier, J. Aguilar, D. Brooks, A. de la Macorra, P. Doel, D. J. Eisenstein, J. E. Forero-Romero, S. Gontcho A. Gontcho, K. Honscheid, R. Kehoe, M. Landriau, R. Miquel, Jundan Nie, W. J. Percival, G. Rossi, Gregory Tarle, Zhimin Zhou
Summary: The full-shape correlations of the Lyman alpha forest can provide valuable cosmological information. To analyze them accurately, we use the N-body simulation suite AbacusSummit to generate high-resolution Lyman alpha skewers and quasi-stellar object (QSO) catalogues. Our mocks aim to assist the Dark Energy Spectroscopic Instrument (DESI) team in their analysis of the Lyman alpha forest. We calibrate our skewers by comparing them to power spectra from a hydrodynamical simulation.
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