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
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
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
Rafael Garcia, Eduardo Rozo, Matthew R. Becker, Surhud More
Summary: The proposed model integrates halo exclusion and redefines halo boundary in a flexible way, leading to successful description of the halo-mass correlation function within a certain range. The features of the model, including scale-dependent biasing and a transition radius, contribute to a more accurate representation of haloes' behavior in tracing mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Naonori S. Sugiyama, Daisuke Yamauchi, Tsutomu Kobayashi, Tomohiro Fujita, Shun Arai, Shin'ichi Hirano, Shun Saito, Florian Beutler, Hee-Jong Seo
Summary: For the first time, we have conducted an observational test of the consistency relation for the large-scale structure (LSS) of the Universe by jointly analyzing the anisotropic two-and three-point correlation functions (2PCF and 3PCF) of galaxies. Using the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12, we found no violation of the LSS consistency relation in our analysis within the statistical errors. Our analysis opens up a new observational window to test fundamental physics using anisotropic higher-order correlation functions of galaxy clustering.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Sownak Bose, Boryana Hadzhiyska, Monica Barrera, Ana Maria Delgado, Fulvio Ferlito, Carlos Frenk, Cesar Hernandez-Aguayo, Lars Hernquist, Rahul Kannan, Ruediger Pakmor, Volker Springel, Simon D. M. White
Summary: Modern redshift surveys are mapping the distribution of galaxies on enormous distance scales. However, current hydrodynamical simulations cannot reach the volumes needed for upcoming surveys. A new, large volume hydrodynamical simulation called MillenniumTNG (MTNG) is able to accurately reproduce the observed clustering of galaxies, but there are discrepancies when separated by color. This is due to the quenching of satellite galaxies in the model.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Ivelin Georgiev, Garrelt Mellema, Sambit K. Giri, Rajesh Mondal
Summary: This study investigates the evolution of the 21-cm power spectrum through numerical and semi-numerical simulations, revealing that the large-scale signal is related to the cosmological density field, while the small-scale power spectrum is influenced by the astrophysics of reionization.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Fulvio Melia, Qingbo Ma, Jun-Jie Wei, Bo Yu
Summary: This paper investigates potential anomalies in the fluctuation spectrum of the cosmic microwave background temperature, suggesting that the cutoff in the primordial power spectrum may explain both the low level of correlation at large angles and missing power in the low multipole moments of the angular power spectrum. The study confirms that introducing this cutoff does not affect the overall consistency between Planck-ΛCDM prediction and measurements at l30.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Thomas Kite, Jens Chluba, Andrea Ravenni, Subodh P. Patil
Summary: The researchers used numerical methods to explore the energy spectrum characteristics of the primordial gravitational wave background, discussing the effects of different eras in the early universe and their importance in cosmological parameters. Numerical analysis can reveal potential errors in previous literature and describe the effects of gravitational wave backgrounds at different scales.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Boryana Hadzhiyska, Sonya Liu, Rachel S. Somerville, Austen Gabrielpillai, Sownak Bose, Daniel Eisenstein, Lars Hernquist
Summary: In this study, two galaxy models (Illustris'ING and SC-SAM) were compared for their predictions on large scale structure observables for stellar mass selected samples at z=0. The models show good agreement in two-point clustering and galaxy assembly bias, but differences in areas such as halo gas content correlation with environment and occupancy predictions for low-mass haloes. Higher order statistics help accurately describe the galaxy distribution and differentiate between models showing similar behavior in two-point statistics. SAMs are suggested as a promising method for generating mock catalogues for future cosmological surveys.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Fulvio Melia
Summary: Studies of the Universe's transition to smoothness based on the Lambda cold dark matter (Lambda CDM) model have found a transition radius of about 300 Mpc. However, observations have shown giant structures extending over scales much larger than expected, suggesting the possibility of new physics. In this paper, the fractal dimension is calculated as a function of distance in the alternative R-h = ct cosmology, showing a smooth transition at about 2.2 Gpc and providing further support for this model.
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.
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(2022)
Article
Astronomy & Astrophysics
Konstantinos Tanidis, Stefano Camera
Summary: In this paper, the multitracer technique is applied to harmonic-space power spectra with a likelihood-based approach, surpassing the usual Fisher matrix formalism. A modified version of the CosmoSIS code, including all previously presented add-ons, is released for cosmological parameter estimation. The improvement in parameter constraints enabled by the use of multiple tracers is demonstrated, achieving a 44% enhancement on the 2 sigma upper bound on the sum of neutrino masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
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.
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(2022)
Article
Astronomy & Astrophysics
Swati Gavas, Jasjeet Bagla, Nishikanta Khandai, Girish Kulkarni
Summary: In this paper, we investigate the power spectrum dependence of halo mass function through a suite of dark-matter-only N-body simulations. The mass function shows a clear non-universality, and fits for the parameters of the Sheth-Tormen mass function are presented. We also show that the Sheth-Tormen mass function derived from a matched power-law Einstein-de Sitter cosmology provides a better fit to the LCDM mass function.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Naomi Clare Robertson, David Alonso, Joachim Harnois-Deraps, Omar Darwish, Arun Kannawadi, Alexandra Amon, Marika Asgari, Maciej Bilicki, Erminia Calabrese, Steve K. Choi, Mark J. Devlin, Jo Dunkley, Andrej Dvornik, Thomas Erben, Simone Ferraro, Maria Cristina Fortuna, Benjamin Giblin, Dongwon Han, Catherine Heymans, Hendrik Hildebrandt, J. Colin Hill, Matt Hilton, Shuay-Pwu P. Ho, Henk Hoekstra, Johannes Hubmayr, John P. Hughes, Benjamin Joachimi, Shahab Joudaki, Kenda Knowles, Konrad Kuijken, Mathew S. Madhavacheril, Kavilan Moodley, Lance Miller, Toshiya Namikawa, Federico Nati, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Emmanuel Schaan, Alessandro Schillaci, Peter Schneider, Neelima Sehgal, Blake D. Sherwin, Cristobal Sifon, Suzanne T. Staggs, Tilman Troster, Alexander van Engelen, Edwin Valentijn, Edward J. Wollack, Angus H. Wright, Zhilei Xu
Summary: In this study, cross-correlation between galaxy weak lensing data and CMB lensing data was measured, yielding cosmological constraints consistent with flat ΛCDM cosmological models. The analysis demonstrated the potential of CMB weak lensing cross-correlations in setting constraints on redshift or shear calibration, particularly for challenging high-redshift galaxy samples.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Ziang Yan, Ludovic van Waerbeke, Tilman Troster, Angus H. Wright, David Alonso, Marika Asgari, Maciej Bilicki, Thomas Erben, Shiming Gu, Catherine Heymans, Hendrik Hildebrandt, Gary Hinshaw, Nick Koukoufilippas, Arun Kannawadi, Konrad Kuijken, Alexander Mead, HuanYuan Shan
Summary: This study successfully constrains the redshift dependence of gas pressure bias and galaxy bias through cross-correlations between galaxy positions, tSZ effect, and CMB lensing. The best-fit values of gas pressure bias are around 0.3 meV cm(-3) and slightly increase with redshift, while galaxy bias remains consistent with unity across all redshift bins. The results are in agreement with previous measurements and theoretical predictions, demonstrating the feasibility of using CMB lensing to calibrate galaxy distribution for mass proxy applications.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Maximilian Von Wietersheim-Kramsta, Benjamin Joachimi, Jan Luca van den Busch, Catherine Heymans, Hendrik Hildebrandt, Marika Asgari, Tilman Tr'oster, Sandra Unruh, Angus H. Wright
Summary: Gravitational lensing magnification can significantly impact the observed spatial distribution of galaxies, emphasizing the need for accurate modeling. A method to quantify the magnification bias in galaxy samples subject to selection functions beyond simple flux limits has been proposed and tested, aiming to enhance the analysis of observational data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Tilman Troster, Alexander J. Mead, Catherine Heymans, Ziang Yan, David Alonso, Marika Asgari, Maciej Bilicki, Andrej Dvornik, Hendrik Hildebrandt, Benjamin Joachimi, Arun Kannawadi, Konrad Kuijken, Peter Schneider, Huan Yuan Shan, Ludovic van Waerbeke, Angus H. Wright
Summary: The researchers conducted a pseudo-C-l analysis of the cross-correlation between weak-lensing data and the thermal Sunyaev-Zeldovich effect. The results provide consistent cosmological constraints and demonstrate the potential of joint analyses with baryonic tracers like the tSZ effect.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Leauthaud, A. Amon, S. Singh, D. Gruen, J. U. Lange, S. Huang, N. C. Robertson, T. N. Varga, Y. Luo, C. Heymans, H. Hildebrandt, C. Blake, M. Aguena, S. Allam, F. Andrade-Oliveira, J. Annis, E. Bertin, S. Bhargava, J. Blazek, S. L. Bridle, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, F. J. Castander, R. Cawthon, A. Choi, M. Costanzi, L. N. da Costa, M. E. S. Pereira, C. Davis, J. De Vicente, J. DeRose, H. T. Diehl, J. P. Dietrich, P. Doel, K. Eckert, S. Everett, A. E. Evrard, I Ferrero, B. Flaugher, P. Fosalba, J. Garcia-Bellido, M. Gatti, E. Gaztanaga, R. A. Gruendl, J. Gschwend, W. G. Hartley, D. L. Hollowood, K. Honscheid, B. Jain, D. J. James, M. Jarvis, B. Joachimi, A. Kannawadi, A. G. Kim, E. Krause, K. Kuehn, K. Kuijken, N. Kuropatkin, M. Lima, N. MacCrann, M. A. G. Maia, M. Makler, M. March, J. L. Marshall, P. Melchior, F. Menanteau, R. Miquel, H. Miyatake, J. J. Mohr, B. Moraes, S. More, M. Surhud, R. Morgan, J. Myles, R. L. C. Ogando, A. Palmese, F. Paz-Chinchon, A. A. Plazas Malagon, J. Prat, M. M. Rau, J. Rhodes, M. Rodriguez-Monroy, A. Roodman, A. J. Ross, S. Samuroff, C. Sanchez, E. Sanchez, V Scarpine, D. J. Schlegel, M. Schubnell, S. Serrano, I Sevilla-Noarbe, C. Sifon, M. Smith, J. S. Speagle, E. Suchyta, G. Tarle, D. Thomas, J. Tinker, C. To, M. A. Troxel, L. Van Waerbeke, P. Vielzeuf, A. H. Wright
Summary: Lensing without borders is a cross-survey collaboration aimed at assessing the consistency of galaxy-galaxy lensing signals across different data sets and testing systematic errors. The study compares the amplitude of Delta sigma using lens samples from different surveys and finds good agreement between empirically estimated and reported systematic errors. A correlation between lensing amplitude and survey depth is detected in some lenses, possibly due to unrecognized galaxy blends and imperfections in photometric redshift calibration. The analysis suggests that lensing systematics alone are unlikely to fully explain the 'lensing is low' effect.
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(2022)
Article
Astronomy & Astrophysics
Peter Schneider, Marika Asgari, Yasaman Najafi Jozani, Andrej Dvornik, Benjamin Giblin, Joachim Harnois-Deraps, Catherine Heymans, Hendrik Hildebrandt, Henk Hoekstra, Konrad Kuijken, HuanYuan Shan, Tilman Troster, Angus H. Wright
Summary: This paper derives explicit equations for pure-mode shear correlation functions and their ambiguous components, and applies these results to the analysis of cosmic shear data. The new statistics fit well to the cosmological model and recover the same level of B modes. The study also considers ambiguous modes at different levels and reveals some surprising results.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Loureiro, L. Whittaker, A. Spurio Mancini, B. Joachimi, A. Cuceu, M. Asgari, B. Stolzner, T. Troster, A. H. Wright, M. Bilicki, A. Dvornik, B. Giblin, C. Heymans, H. Hildebrandt, H. Shan, A. Amara, N. Auricchio, C. Bodendorf, D. Bonino, E. Branchini, M. Brescia, V. Capobianco, C. Carbone, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, L. Conversi, Y. Copin, L. Corcione, M. Cropper, A. Da Silva, M. Douspis, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, S. Farrens, S. Ferriol, P. Fosalba, M. Frailis, E. Franceschi, M. Fumana, B. Garilli, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, S. V. H. Haugan, W. Holmes, F. Hormuth, K. Jahnke, M. Kummel, S. Kermiche, A. Kiessling, M. Kilbinger, T. Kitching, K. Kuijken, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, F. Marulli, R. Massey, M. Meneghetti, G. Meylan, M. Moresco, B. Morin, L. Moscardini, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, V. Pettorino, S. Pires, M. Poncet, L. Popa, F. Raison, J. Rhodes, H. Rix, M. Roncarelli, R. Saglia, P. Schneider, A. Secroun, S. Serrano, C. Sirignano, G. Sirri, L. Stanco, J. L. Starck, P. Tallada-Crespi, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, E. A. Valentijn, Y. Wang, N. Welikala, J. Weller, G. Zamorani, J. Zoubian, S. Andreon, M. Baldi, S. Camera, R. Farinelli, G. Polenta, N. Tessore
Summary: This paper presents a tomographic weak lensing analysis of the KiDS-1000 survey, using a new pseudo-angular power spectrum estimator. The analysis provides constraints on cosmological parameters, which are consistent with previous measurements and confirm a tension with early-Universe constraints.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Ziang Yan, Ludovic van Waerbeke, Angus H. Wright, Maciej Bilicki, Shiming Gu, Hendrik Hildebrandt, Abhishek S. Maniyar, Tilman Troster
Summary: In this work, a new method for probing the star formation history of the Universe is presented, which involves tomographic cross-correlation between the cosmic infrared background (CIB) and galaxy samples. The results demonstrate the effectiveness of this method in constraining the star formation rate and galaxy abundance, providing important insights into the evolution of the Universe.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Axel Guinot, Martin Kilbinger, Samuel Farrens, Austin Peel, Arnau Pujol, Morgan Schmitz, Jean-Luc Starck, Thomas Erben, Raphael Gavazzi, Stephen Gwyn, Michael J. Hudson, Hendrik Hildebrandt, Liaudat Tobias, Lance Miller, Isaac Spitzer, Ludovic Van Waerbeke, Jean-Charles Cuillandre, Sebastien Fabbro, Alan McConnachie, Yannick Mellier
Summary: This study performs the first weak-lensing analysis of CFIS r-band data over a large area of the northern sky, creating a catalog with measured shapes for 40 million galaxies. The results demonstrate a low level of systematic biases and serve as a basis for further cosmological studies.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. L. van den Busch, A. H. Wright, H. Hildebrandt, M. Bilicki, M. Asgari, S. Joudaki, C. Blake, C. Heymans, A. Kannawadi, H. Y. Shan, T. Troster
Summary: In this study, a cosmic shear analysis with an improved redshift calibration for the fourth data release of the Kilo-Degree Survey (KiDS-1000) was presented using self-organising maps (SOMs). The redshift calibration sample was expanded to include data from 17 spectroscopic redshift campaigns and was enhanced with precision photometric redshifts from COSMOS2015 and the Physics of the Accelerated Universe Survey (PAUS). A Complete Orthogonal Sets of E/B-Integrals (COSEBIs) cosmic shear analysis was performed on the newly calibrated KiDS sample. The results showed good agreement with previous studies and increased the tension with measurements of the cosmic microwave background.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Denis Tramonte, Yin-Zhe Ma, Ziang Yan, Matteo Maturi, Gianluca Castignani, Mauro Sereno, Sandro Bardelli, Carlo Giocoli, Federico Marulli, Lauro Moscardini, Emanuella Puddu, Mario Radovich, Ludovic Van Waerbeke, Angus H. Wright
Summary: We provide novel constraints on the parameters defining the universal pressure profile within clusters of galaxies, and explore their dependencies on cluster mass and redshift, from measurements of Sunyaev-Zel'dovich Compton y-profiles.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Bailey Robison, Michael J. Hudson, Jean-Charles Cuillandre, Thomas Erben, Sebastien Fabbro, Raphael Gavazzi, Axel Guinot, Stephen Gwyn, Hendrik Hildebrandt, Martin Kilbinger, Alan McConnachie, Lance Miller, Isaac Spitzer, Ludovic van Waerbeke
Summary: Using weak gravitational lensing, the ellipticity of dark matter haloes around Luminous Red Galaxies (LRGs) was measured. The results showed that for LRGs in the Sloan Digital Sky Survey Data Release 7 (DR7) with mass M~ 2.7 x 10^13 M_sun h^-1, the halo ellipticity was found to be e = 0.46 +/- 0.10, with f(h) = 2.2 +/- 0.6 as a fraction of the galaxy's ellipticity. For BOSS LRGs, the detection was marginally significant: e = 0.20 +/- 0.10 and f(h) = 0.7 +/- 0.7. These findings are consistent with previous measurements and suggest an increase in halo ellipticity of 0.10 +/- 0.06 per decade in halo mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Shiming Gu, Marc-Antoine Dor, Ludovic van Waerbeke, Marika Asgari, Alexander Mead, Tilman Troester, Ziang Yan
Summary: This study investigates the impact of allowing the halo mass function (HMF) to vary. It finds that the standard HMF used with Planck cosmology is incompatible with observational data, but allowing variation in the HMF parameters resolves the tension.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)