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
Jiamin Hou, Zachary Slepian, Robert N. Cahn
Summary: The tetrahedron-shaped correlation function (4PCF) provides evidence for violation of parity symmetry in the clustering of galaxies. This effect, which cannot be explained by gravitational evolution alone, suggests a cosmological origin during the epoch of inflation. The detection of this odd-parity 4PCF opens up new possibilities for exploring new forces in the large-scale structure of the universe.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
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
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
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
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
Monica Hernandez-Sanchez, Francisco-Shu Kitaura, Metin Ata, Claudio Dalla Vecchia
Summary: This study investigates higher order symplectic integration strategies within Bayesian cosmic density field reconstruction methods, focusing on the fourth-order discretization of Hamiltonian equations of motion. The results show that transitioning from the usual second to fourth order in the leap-frog scheme shortens the burn-in phase and increases the number of independent samples obtained, while reducing the number of gradient computations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
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
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
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
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
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
M. J. M. Marcha, I. W. A. Browne
Summary: Evidence for large-scale clustering is found among Fermi-selected BL Lac objects, but not among Fermi-selected FSRQs. High-latitude Fermi sources as a whole show a significant clustering signal on scales up to 30 degrees, while this signal may be washed out in FSRQs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Nicolas Chartier, Benjamin Wandelt, Yashar Akrami, Francisco Villaescusa-Navarro
Summary: This study introduces a general method called CARPool, which utilizes the correlation between simulations and surrogates to compute fast, reduced-variance statistics of large-scale structure observables. Numerical experiments demonstrate significant improvements in both the non-linear and linear regimes using CARPool.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Zachary Slepian, Daniel J. Eisenstein, Jonathan A. Blazek, Joel R. Brownstein, Chia-Hsun Chuang, Hector Gil-Marin, Shirley Ho, Francisco-Shu Kitaura, Joseph E. McEwen, Will J. Percival, Ashley J. Ross, Graziano Rossi, Hee-Jong Seo, Anze Slosar, Mariana Vargas-Magana
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Zachary Slepian, Stephen K. N. Portillo
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Zachary Slepian, Daniel J. Eisenstein
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Sankalp Gilda, Zachary Slepian
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Astronomy & Astrophysics
Zachary Slepian
Summary: This paper presents a new method to tackle the issue of high-dimensional integrals in perturbation theory, making the computation of higher order corrections more efficient and feasible. The method transforms the calculation of corrections into combinations of independent 1D integrals, and simplifies the integration process using specific techniques.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Andrew K. Saydjari, Stephen K. N. Portillo, Zachary Slepian, Sule Kahraman, Blakesley Burkhart, Douglas P. Finkbeiner
Summary: This paper demonstrates the sensitivity of wavelet scattering transform (WST) combined with linear discriminant analysis (LDA) to non-Gaussian structures in 2D interstellar medium dust maps. The WST-LDA method shows a high true positive rate in classifying magnetohydrodynamic (MHD) turbulence simulations and is robust to observational artifacts. Further applications in 3D and potential use on all-sky dust maps for extracting hydrodynamic parameters are discussed.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Oliver H. E. Philcox, Zachary Slepian, Jiamin Hou, Craig Warner, Robert N. Cahn, Daniel J. Eisenstein
Summary: The new algorithm efficiently computes N-point correlation functions of a 3D density field for arbitrary N, applicable to both discrete spectroscopic galaxy surveys and continuous fields. By estimating NPCFs through counting pairs of particles in space, the algorithm has low complexity for N-g particles and scales linearly.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Oliver H. E. Philcox, Zachary Slepian
Summary: Efficient algorithms for computing the N-point correlation functions (NPCFs) of random fields in arbitrary D-dimensional homogeneous and isotropic spaces are presented. The estimators are expressed in a separable form by projecting the statistic onto a suitably defined angular basis, resulting in lower computational complexity. A Julia package implementing these estimators is provided, along with applications in cosmology and fluid dynamics.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Multidisciplinary
Robert N. Cahn, Zachary Slepian, Jiamin Hou
Summary: We describe how the galaxy four-point correlation function can be used to test for cosmological parity violation, which would indicate unknown forces in the early universe. Recent advancements in evaluating galaxy N-point correlation functions and determining the corresponding covariance matrices enable the search for parity violation in the four-point correlation function in ongoing and upcoming surveys. We estimate the potential limits on cosmic parity violation that can be achieved using these data.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
Oliver H. E. Philcox, Zachary Slepian
Summary: This study proposes practical algorithms for computing the power spectrum and 2PCF multipoles using pairwise lines of sight, adopting the galaxy midpoint or angle bisector definitions. The accuracy of these estimators can reach arbitrary order, producing comparable results to conventional methods with only modest additional computational cost in practice.
Article
Astronomy & Astrophysics
B. Burkhart, S. M. Appel, S. Bialy, J. Cho, A. J. Christensen, D. Collins, C. Federrath, D. B. Fielding, D. Finkbeiner, A. S. Hill, J. C. Ibanez-Mejia, M. R. Krumholz, A. Lazarian, M. Li, P. Mocz, M. -M. Mac Low, J. Naiman, S. K. N. Portillo, B. Shane, Z. Slepian, Y. Yuan
ASTROPHYSICAL JOURNAL
(2020)
Article
Astronomy & Astrophysics
Arjun Dey, David J. Schlegel, Dustin Lang, Robert Blum, Kaylan Burleigh, Xiaohui Fan, Joseph R. Findlay, Doug Finkbeiner, David Herrera, Stephanie Juneau, Martin Landriau, Michael Levi, Ian McGreer, Aaron Meisner, Adam D. Myers, John Moustakas, Peter Nugent, Anna Patej, Edward F. Schlafly, Alistair R. Walker, Francisco Valdes, Benjamin A. Weaver, Christophe Yeche, Hu Zou, Xu Zhou, Behzad Abareshi, T. M. C. Abbott, Bela Abolfathi, C. Aguilera, Shadab Alam, Lori Allen, A. Alvarez, James Annis, Behzad Ansarinejad, Marie Aubert, Jacqueline Beechert, Eric F. Bell, Segev Y. BenZvi, Florian Beutler, Richard M. Bielby, Adam S. Bolton, Cesar Briceno, Elizabeth J. Buckley-Geer, Karen Butler, Annalisa Calamida, Raymond G. Carlberg, Paul Carter, Ricard Casas, Francisco J. Castander, Yumi Choi, Johan Comparat, Elena Cukanovaite, Timothee Delubac, Kaitlin DeVries, Sharmila Dey, Govinda Dhungana, Mark Dickinson, Zhejie Ding, John B. Donaldson, Yutong Duan, Christopher J. Duckworth, Sarah Eftekharzadeh, Daniel J. Eisenstein, Thomas Etourneau, Parker A. Fagrelius, Jay Farihi, Mike Fitzpatrick, Andreu Font-Ribera, Leah Fulmer, Boris T. Gansicke, Enrique Gaztanaga, Koshy George, David W. Gerdes, Satya Gontcho A. Gontcho, Claudio Gorgoni, Gregory Green, Julien Guy, Diane Harmer, M. Hernandez, Klaus Honscheid, Lijuan (Wendy) Huang, David J. James, Buell T. Jannuzi, Linhua Jiang, Richard Joyce, Armin Karcher, Sonia Karkar, Robert Kehoe, Jean-Paul Kneib, Andrea Kueter-Young, Ting-Wen Lan, Tod R. Lauer, Laurent Le Guillou, Auguste Le Van Suu, Jae Hyeon Lee, Michael Lesser, Laurence Perreault Levasseur, Ting S. Li, Justin L. Mann, Robert Marshall, C. E. Martinez-Vazquez, Paul Martini, Helion du Mas des Bourboux, Sean McManus, Tobias Gabriel Meier, Brice Menard, Nigel Metcalfe, Andrea Munoz-Gutierrez, Joan Najita, Kevin Napier, Gautham Narayan, Jeffrey A. Newman, Jundan Nie, Brian Nord, Dara J. Norman, Knut A. G. Olsen, Anthony Paat, Nathalie Palanque-Delabrouille, Xiyan Peng, Claire L. Poppett, Megan R. Poremba, Abhishek Prakash, David Rabinowitz, Anand Raichoor, Mehdi Rezaie, A. N. Robertson, Natalie A. Roe, Ashley J. Ross, Nicholas P. Ross, Gregory Rudnick, Sasha Safonova, Abhijit Saha, F. Javier Sanchez, Elodie Savary, Heidi Schweiker, Adam Scott, Hee-Jong Seo, Huanyuan Shan, David R. Silva, Zachary Slepian, Christian Soto, David Sprayberry, Ryan Staten, Coley M. Stillman, Robert J. Stupak, David L. Summers, Suk Sien Tie, H. Tirado, Mariana Vargas-Magana, A. Katherina Vivas, Risa H. Wechsler, Doug Williams, Jinyi Yang, Qian Yang, Tolga Yapici, Dennis Zaritsky, A. Zenteno, Kai Zhang, Tianmeng Zhang, Rongpu Zhou, Zhimin Zhou
ASTRONOMICAL JOURNAL
(2019)
Article
Astronomy & Astrophysics
Hillary L. Child, Masahiro Takada, Takahiro Nishimichi, Tomomi Sunayama, Zachary Slepian, Salman Habib, Katrin Heitmann
Article
Astronomy & Astrophysics
Nick Hand, Yu Feng, Florian Beutler, Yin Li, Chirag Modi, Uros Seljak, Zachary Slepian
ASTRONOMICAL JOURNAL
(2018)
Article
Astronomy & Astrophysics
Stephen K. N. Portillo, Zachary Slepian, Blakesley Burkhart, Sule Kahraman, Douglas P. Finkbeiner
ASTROPHYSICAL JOURNAL
(2018)
