Article
Astronomy & Astrophysics
Agustin M. Rodriguez-Medrano, Dante J. Paz, Federico A. Stasyszyn, Facundo Rodriguez, Andres N. Ruiz, Manuel Merchan
Summary: Research has shown that galaxies in cosmic voids exhibit delayed evolution compared to the rest of the Universe, indicating interactions between galaxies and their environment. The extent to which large-scale structures influence the properties of void galaxies, or if they are primarily influenced by the low local density typical of these regions, remains unclear. In this study, cosmic voids were identified in SDSS-DR16, and the g-r colour, star formation rate, and concentration of galaxies were examined. Results showed that galaxies in voids had bluer colours, higher star formation rates, and lower concentrations, particularly for haloes of a certain mass. Additionally, the properties of galaxies were found to be sensitive to the type of void they inhabited, suggesting a correlation between galaxy properties and the large-scale environment provided by voids.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
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
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
Sicheng Lin, Jeremy L. Tinker, Michael R. Blanton, Hong Guo, Anand Raichoor, Johan Comparat, Joel R. Brownstein
Summary: In this study, a model is developed using conditional matching and Markov Chain Monte Carlo method to interpret the small-scale clustering of eBOSS galaxies from Sloan Digital Sky Survey IV. It is found that by matching the star formation rate of galaxies and the halo accretion rate, the eBOSS ELG small-scale clustering can be reproduced within 1 sigma error level.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Rory Smith, Ho Seong Hwang, Katarina Kraljic, Paula Calderon-Castillo, Thomas M. Jackson, Anna Pasquali, Jihye Shin, Jongwan Ko, Jaewon Yoo, Hyowon Kim, Jae-Woo Kim
Summary: This study provides strong evidence for the growth of clusters and their Brightest Cluster Galaxies (BCGs) by preferential feeding along the direction of the filaments in which they are embedded, through analyzing the alignment signal between the BCGs, cluster members, and large-scale structures.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Aaron Wilkinson, Omar Almaini, Vivienne Wild, David Maltby, William G. Hartley, Chris Simpson, Kate Rowlands
Summary: The study reveals that low-mass, low-redshift post-starburst (PSB) galaxies tend to reside in high-mass dark matter haloes, while high-mass PSB galaxies are clustered in higher mass haloes with increasing look-back time, indicating strong redshift-dependent halo downsizing. These findings are consistent with previous results, suggesting two main channels responsible for the rapid quenching of galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
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
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
M. Celeste Artale, Markus Haider, Antonio D. Montero-Dorta, Mark Vogelsberger, Davide Martizzi, Paul Torrey, Simeon Bird, Lars Hernquist, Federico Marinacci
Summary: The study examines the distribution and evolution of seven ionized metals in different cosmic structures and gas phases in a cosmological simulation. It reveals different patterns in the distribution and evolution of ionized metals, offering a new perspective on baryon distribution and evolution across cosmic time and providing new clues to the missing baryons problem.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Xiaokai Chen, Ying Zu, Zhiwei Shao, Huanyuan Shan
Summary: In the investigation of the transition between bright central galaxies (BCGs) and intracluster light (ICL), we have discovered an intriguing transitional component and speculate that the sphere of influence of BCG is related to the escape velocity profile within the characteristic radius of dark matter haloes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Daniele Sorini, Romeel Dave, Weiguang Cui, Sarah Appleby
Summary: The study indicates that star formation in galaxies and AGN jets have significant impacts on the distribution of matter, especially causing baryon evacuation at different redshifts. In larger systems, AGN jets are particularly efficient in evacuating baryons, leading to the majority of baryonic mass being in the IGM.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
S. A. Pustilnik, E. S. Egorova, A. Y. Kniazev, Y. A. Perepelitsyna, A. L. Tepliakova, A. N. Burenkov, D. Oparin
Summary: The ongoing project aims to search for and study Extremely Metal-Poor (XMP) galaxies in voids, with a focus on estimating oxygen abundance using new methods. So far, 16 void XMP candidates and eight less metal-poor galaxies have been studied, increasing the total number of known galaxies of this type to 19.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Joop Schaye, Roi Kugel, Matthieu Schaller, John C. Helly, Joey Braspenning, Willem Elbers, Ian G. Mccarthy, Marcel P. van Daalen, Bert Vandenbroucke, Carlos S. Frenk, Juliana Kwan, Jaime Salcido, Yannick M. Bahe, Josh Borrow, Evgenii Chaikin, Oliver Hahn, Filip Husko, Adrian Jenkins, Cedric G. Lacey, Folkert S. J. Nobels
Summary: We introduce the FLAMINGO suite of hydrodynamical simulations for cosmology and galaxy cluster physics developed by the Virgo Consortium. The simulations are calibrated using machine learning based on the observed low-redshift galaxy stellar mass function and cluster gas fractions. The suite includes simulations of different resolutions, with the largest simulation tracking 3 x 10^11 particles. We investigate numerical convergence and compare the simulations with various observations, showing good agreement. Comparing hydrodynamical and 'dark-matter-only' simulations, we confirm the impact of baryonic effects on the halo mass function and matter power spectrum.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Review
Astronomy & Astrophysics
Manuela Magliocchetti
Summary: Extragalactic radio sources play a crucial role in the evolution and structure of the universe, providing important information about its star-formation history and large-scale properties.
ASTRONOMY AND ASTROPHYSICS REVIEW
(2022)
Article
Astronomy & Astrophysics
S. A. Pustilnik, A. L. Tepliakova, Y. A. Perepelitsyna, A. Y. Kniazev, L. N. Makarova, A. N. Burenkov, S. S. Kotov, E. A. Malygin
Summary: KK242 is a LV dwarf of transition type residing in the void environment. Observations indicate a connection between KK242 and Scd galaxy NGC 6503. The radial velocity of KK242 shows differences with that of NGC 6503, suggesting constraints on its origin. Spectra taken from the faint star-forming complex of KK242 reveal the presence of exciting hot stars, probable BHeB and RHeB stars, and a supernova remnant.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Robert E. Smith, Laura Marian
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Laura Marian, Robert E. Smith, Raul E. Angulo
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Darren S. Reed, Aurel Schneider, Robert E. Smith, Doug Potter, Joachim Stadel, Ben Moore
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
A. Eggemeier, T. Battefeld, R. E. Smith, J. Niemeyer
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2015)
Article
Astronomy & Astrophysics
Aurel Schneider, Romain Teyssier, Doug Potter, Joachim Stadel, Julian Onions, Darren S. Reed, Robert E. Smith, Volker Springel, Frazer R. Pearce, Roman Scoccimarro
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2016)
Article
Astronomy & Astrophysics
Robert E. Smith, Laura Marian
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2016)
Article
Astronomy & Astrophysics
Robert E. Smith, Laura Marian
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2016)
Article
Astronomy & Astrophysics
Alexander Eggemeier, Robert E. Smith
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2017)
Article
Astronomy & Astrophysics
Joyce Byun, Alexander Eggemeier, Donough Regan, David Seery, Robert E. Smith
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2017)
Article
Astronomy & Astrophysics
Robert E. Smith, Raul E. Angulo
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2019)
Article
Astronomy & Astrophysics
Lucas Porth, Robert E. Smith, Patrick Simon, Laura Marian, Stefan Hilbert
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2020)
Article
Astronomy & Astrophysics
Lucas Porth, Robert E. Smith
Summary: We present an alternative method for estimating aperture mass statistics in weak-lensing survey data, extending the analysis to arbitrary order statistics and multiscale aperture mass statistics. Our approach demonstrates a linear order algorithm for retrieving generalized aperture mass statistics and is validated through Gaussian mock-lensing surveys and real-world mock catalogues, showing potential for detecting higher-order clustering in surveys like KiDS-1000. These methods are expected to be useful for upcoming wide-field surveys such as Euclid and the Rubin Telescope.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Lucas Porth, Gary M. Bernstein, Robert E. Smith, Abigail J. Lee
Summary: We investigate the recovery of information on the mass fluctuation amplitude using a Hamiltonian Monte Carlo method. The method can recover more information than the 2D power spectrum in certain conditions.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Alexander Eggemeier, Roman Scoccimarro, Robert E. Smith, Martin Crocce, Andrea Pezzotta, Ariel G. Sanchez
Summary: In this study, a joint likelihood analysis of the real-space power spectrum and bispectrum measured from various halo and galaxy mock catalogs is presented, validating the stringentness of the one-loop correction model for galaxy bias compared to the tree-level bispectrum model. The results show that the one-loop corrections roughly double the applicable range of scales, leading to significant improvements in constraints on the linear bias parameter and the amplitude of fluctuations A(s).
Article
Astronomy & Astrophysics
Alexander Eggemeier, Roman Scoccimarro, Robert E. Smith