Review
Astronomy & Astrophysics
Dominique Eckert, Massimo Gaspari, Fabio Gastaldello, Amandine M. C. Le Brun, Ewan O'Sullivan
Summary: The co-evolution between supermassive black holes and their environment is traced by the hot atmospheres of dark matter halos, with the cooling of the hot atmosphere supplying fresh gas to the central regions, igniting active galactic nuclei. Galaxy groups are uniquely suited to constrain the mechanisms governing the cooling-heating balance.
Article
Astronomy & Astrophysics
Sunayana Bhargava, Christian Garrel, Elias Koulouridis, Marguerite Pierre, Ivan Valtchanov, Nicolas Cerardi, Ben J. Maughan, Michel Aguena, Christophe Benoist, Cale Baguley, Miriam E. Ramos-Ceja, Christophe Adami, Lucio Chiappetti, Cristian Vignali, Jon P. Willis
Summary: In the XXL survey, we have detected and characterized galaxy clusters contaminated by central AGNs, and assessed the cosmological impact of such systems in X-ray cluster samples. We have introduced a new automated class for AGN-contaminated clusters in the XXL source detection pipeline, and found that this selection is effective in distinguishing AGN and cool-core presence using supplementary optical and infrared information.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Miguel Aparicio Resco, Antonio L. Maroto
Summary: FARO is a new public Python code that computes the Fisher matrix for galaxy survey observables, allowing for tomographic and model-independent analysis, and forecasting the sensitivity of future galaxy surveys like DESI, Euclid, J-PAS and LSST.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Laura D. Baravalle, Maria Victoria Alonso, Dante Minniti, Jose Luis Nilo Castellon, Mario Soto, Carlos Valotto, Carolina Villalon, Dario Grana, Eduardo B. Amores, Fernanda Milla Castro
Summary: This study maps the distribution of galaxies across the Southern Galactic plane using the VISTA Variables in the Via Lactea Survey (VVV), resulting in a catalogue of 5563 visually confirmed galaxies, with 99% being new discoveries. The galaxy density distribution closely resembles the distribution of low interstellar extinction, and the main limitations for detecting background galaxies in the Zone of Avoidance are interstellar extinction and stellar density.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. Pocino, I Tutusaus, F. J. Castander, P. Fosalba, M. Crocce, A. Porredon, S. Camera, V Cardone, S. Casas, T. Kitching, F. Lacasa, M. Martinelli, A. Pourtsidou, Z. Sakr, S. Andreon, N. Auricchio, C. Baccigalupi, A. Balaguera-Antolinez, M. Baldi, A. Balestra, S. Bardelli, R. Bender, A. Biviano, C. Bodendorf, D. Bonino, A. Boucaud, E. Bozzo, E. Branchini, M. Brescia, J. Brinchmann, C. Burigana, R. Cabanac, V Capobianco, A. Cappi, C. S. Carvalho, M. Castellano, G. Castignani, S. Cavuoti, A. Cimatti, R. Cledassou, C. Colodro-Conde, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, A. Costille, J. Coupon, H. M. Courtois, M. Cropper, J-G Cuby, A. Da Silva, S. de la Torre, D. Di Ferdinando, F. Dubath, C. Duncan, X. Dupac, S. Dusini, S. Farrens, P. G. Ferreira, I Ferrero, F. Finelli, S. Fotopoulou, M. Frailis, E. Franceschi, S. Galeotta, B. Garilli, W. Gillard, B. Gillis, C. Giocoli, G. Gozaliasl, J. Gracia-Carpio, F. Grupp, L. Guzzo, W. Holmes, F. Hormuth, K. Jahnke, E. Keihanen, S. Kermiche, A. Kiessling, C. C. Kirkpatrick, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I Lloro, D. Maino, E. Maiorano, O. Mansutti, O. Marggraf, N. Martinet, F. Marulli, R. Massey, S. Maurogordato, E. Medinaceli, S. Mei, M. Meneghetti, R. Benton Metcalf, G. Meylan, M. Moresco, B. Morin, L. Moscardini, E. Munari, R. Nakajima, C. Neissner, R. C. Nichol, S. Niemi, J. Nightingale, C. Padilla, S. Paltani, F. Pasian, L. Patrizii, K. Pedersen, W. J. Percival, V Pettorino, S. Pires, G. Polenta, M. Poncet, L. Popa, D. Potter, L. Pozzetti, F. Raison, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, M. Roncarelli, E. Rossetti, R. Saglia, A. G. Sanchez, D. Sapone, R. Scaramella, P. Schneider, V Scottez, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, L. Stanco, F. Sureau, A. N. Taylor, M. Tenti, I Tereno, R. Teyssier, R. Toledo-Moreo, A. Tramacere, E. A. Valentijn, L. Valenziano, J. Valiviita, T. Vassallo, M. Viel, Y. Wang, N. Welikala, L. Whittaker, A. Zacchei, G. Zamorani, J. Zoubian, E. Zucca
Summary: Photometric redshifts are crucial for cosmological studies, affecting galaxy clustering and weak lensing analyses. The accuracy of photometric measurements from future space missions like Euclid must be complemented by ground-based observations. By exploring factors such as redshift binning, survey depth, and photo-z accuracy, we find that certain strategies, such as using equal width redshift bins and increasing the number of bins, can significantly improve the cosmological Figure of Merit (FoM), particularly for galaxy clustering.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Yue Shen, Hsiang-Chih Hwang, Masamune Oguri, Nianyi Chen, Tiziana Di Matteo, Yueying Ni, Simeon Bird, Nadia Zakamska, Xin Liu, Yu-Ching Chen, Kaitlin M. Kratter
Summary: The double quasar fraction was measured to be approximately 6.2 +/- 0.5 x 10(-4) for luminous unobscured quasars at 1.5 < z < 3.5, with separations ranging from 0.3-3 arcseconds. The fraction of double quasars increases as the separation distance decreases.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
ChangHoon Hahn, Michael Eickenberg, Shirley Ho, Jiamin Hou, Pablo Lemos, Elena Massara, Chirag Modi, Azadeh Moradinezhad Dizgah, Bruno Regaldo-Saint Blancard, Muntazir M. Abidi
Summary: Simulation-Based Inference of Galaxies (SIMBIG) is a forward modeling framework that uses simulation-based inference to analyze galaxy clustering. It accurately infers the parameters of galaxy clustering and effectively handles observational systematics. The framework has been validated through a mock challenge, demonstrating its robustness and capability to handle different statistical measures.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Francesco Montanari, Stefano Camera
Summary: The study introduces a new method to estimate the signal-to-noise ratio of the harmonic-space galaxy bispectrum induced by gravity. Results indicate that the harmonic-space bispectrum can be detected in narrow spectroscopic redshift bins, even at mildly non-linear scales.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Marcel Schmittfull, Azadeh Moradinezhad Dizgah
Summary: Modern galaxy surveys focus on the galaxy power spectrum or 2-point correlation function to test and constrain cosmological models. By computing the cross-power spectrum between the squared galaxy density and the galaxy density, all contributions to the tree-level redshift-space galaxy bispectrum can be captured. This simple solution shows that the measurement pipeline matches analytical predictions and theoretical expectations on galaxy bias parameters and the logarithmic growth rate.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Roy Maartens, Sheean Jolicoeur, Obinna Umeh, Eline M. De Weerd, Chris Clarkson
Summary: Next-generation galaxy and 21cm intensity mapping surveys will rely on high-precision measurements of primordial non-Gaussianity using a combination of power spectrum and bispectrum. Theoretical precision at the same level is essential for these measurements. Incorporating a consistent general relativistic model of galaxy bias at second order extends the theoretical understanding of the galaxy bispectrum. The influence of primordial non-Gaussianity on the bispectrum goes beyond galaxy bias and dark matter density, and includes effects from redshift-space distortions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
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
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
Dan Pryer, Robert E. Smith, Robin Booth, Chris Blake, Alexander Eggemeier, Jon Loveday
Summary: The study derives expressions for the galaxy power spectrum convolved by survey window in real space, considering the geometric lightcone effect for full sky and deep redshift surveys. It investigates the impact of using the standard mean redshift approximation, showing both overall amplitude suppression and scale-dependent error compared to the 'true' spectrum. However, it also demonstrates that accurate approximation to the full model can be achieved by carefully choosing an 'effective fixed-time' within a certain range of scales.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
D. Koziel-Wierzbowska, N. Vale Asari, G. Stasinska, F. R. Herpich, M. Sikora, N. Zywucka, A. Goyal
Summary: Based on the analysis of over 32,000 radio sources associated with optical galaxies in the ROGUE I catalog, this study provides two diagnostics, MIRAD and DLM, to select radio-AGNs. These diagnostics can be applied independently and compare different fluxes and break strengths, proposing simple dividing lines for classification. The research reveals that radio-AGNs are preferentially found among elliptical galaxies and galaxies hosting the most massive black holes.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Joseph DeRose, Shi-Fan Chen, Nickolas Kokron, Martin White
Summary: Numerical simulations in cosmology require trade-offs between volume, resolution, and run-time, leading to sample variance in predictions of ensemble-average quantities. We extend the technique of Zel'dovich control variates to reduce the sample variance in measurements of 2-point statistics of biased tracers in redshift space. This allows improved predictions for the clustering of astronomical objects at very modest computational expense.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Philip F. Hopkins, Jonathan Squire, Iryna S. Butsky
Summary: We derive a consistent set of moment equations for cosmic ray magnetohydrodynamics, which are valid in various regimes and allow for anisotropic scattering and transport/magnetic field structure. We discuss the differences between this set of equations and previous treatments, as well as the similarities and differences with the analog M1-RHD equations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Konstantinos Kolokythas, Sravani Vaddi, Ewan O'Sullivan, Ilani Loubser, Arif Babul, Somak Raychaudhury, Patricio Lagos, Thomas H. Jarrett
Summary: Using multiband data, this study examines the star formation activity of nearby group-dominant early-type galaxies and explores the relation between star formation, gas content, and the local environment. The findings suggest that only a small fraction of the galaxies exhibit recent active star formation, while the majority show no significant star formation. The study also highlights the association between central group galaxy evolution and gas mass availability.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Tomas Tamfal, Lucio Mayer, Thomas R. Quinn, Arif Babul, Piero Madau, Pedro R. Capelo, Sijing Shen, Marius Staub
Summary: In this study, a cosmological N-body hydrodynamical simulation with unprecedented resolution was used to investigate the formation process of a Milky Way-sized galaxy halo. The simulated galaxy exhibits early assembly characteristics consistent with extrapolations of star-forming galaxy main sequences to higher redshifts. The results suggest the early presence of a compact, thin rotating stellar disk and a multi-component structure, challenging previous literature reports of upside-down disk growth, with implications for high-redshift galaxy observations.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Andrea Negri, Claudio Dalla Vecchia, J. Alfonso L. Aguerri, Yannick Bahe
Summary: In this study, we computed the luminosity of simulated galaxies in the c-eagle project and found a defined red sequence and well-populated blue cloud in the galaxy mass-color diagram. The inner regions of galaxy clusters are dominated by red-sequence galaxies, but blue galaxies are also present. Bayesian inference was used to compute the clusters' luminosity functions, which showed different trends at the faint end depending on color and mass. The simulated luminosity functions were in agreement with observational data from SDSS and XXL surveys up to z = 0.67.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Justus L. Gibson, Nicolas Lehner, Benjamin D. Oppenheimer, J. Christopher Howk, Kathy L. Cooksey, Andrew J. Fox
Summary: We explore the impact of uncertainties in the extreme-ultraviolet background radiation on the metallicity determinations of circumgalactic gas. We demonstrate the sensitivity of metallicity estimates to changes in the EUV power-law slope of active galactic nuclei. The current sample of absorbers does not provide a robust constraint on the slope itself.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
V Olivares, P. Salome, S. L. Hamer, F. Combes, M. Gaspari, K. Kolokythas, E. O'Sullivan, R. S. Beckmann, A. Babul, F. L. Polles, M. Lehnert, S. Loubser, M. Donahue, M-L Gendron-Marsolais, P. Lagos, G. Pineau des Forets, B. Godard, T. Rose, G. Tremblay, G. Ferland, P. Guillard
Summary: The origin of the cold gas in central galaxies in groups is still debated. Observations of 18 brightest group galaxies (BGGs) reveal complex gas morphologies, including filamentary structures, compact disks, and extended disks. The stellar component shows rotation-dominated kinematics, while the filamentary sources exhibit different and disturbed kinematics. Hα luminosity is found to correlate with cold molecular gas mass. Analysis of the thermodynamic properties suggests that the filamentary and compact disk structures may form from condensations of hot halo gas, similar to brightest cluster galaxies (BCGs) in cool core clusters.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
S. Loubser, P. Lagos, A. Babul, E. O'Sullivan, S. L. Jung, V Olivares, K. Kolokythas
Summary: In this study, the stellar kinematics of 18 brightest group early-type (BGEs) galaxies were analyzed using Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. The results show that the BGEs can be classified as fast or slow rotators, with distinct differences in their kinematic features. Fast rotators are primarily oblate galaxies, while slow rotators exhibit various shapes. The origin of cold gas is likely gas-rich mergers or interactions for fast rotators, and cooling from the intragroup medium for slow rotators.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Folkert S. J. Nobels, Joop Schaye, Matthieu Schaller, Yannick M. Bahe, Evgenii Chaikin
Summary: Using high-resolution simulations, the interaction between the brightest cluster galaxy, its supermassive black hole, and the intracluster medium is studied. It is found that the accretion rate of the black hole shows strong correlation with star formation rate and the intracluster medium when averaged over a long time period. AGN feedback leads to anisotropic outflows and buoyant bubbles, raising the entropy of the intracluster medium and suppressing condensation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Anna Nica, Benjamin D. Oppenheimer, Robert A. Crain, Akos Bogdan, Jonathan J. Davies, William R. Forman, Ralph P. Kraft, John A. ZuHone
Summary: In this study, we investigated the X-ray Circumgalactic Medium (CGM) of present-day galaxies and its dependence on galaxy morphology and azimuthal angle. Mock observations generated from the EAGLE cosmological hydrodynamic simulation were used to make several predictions. We found that the soft X-ray CGM of disc galaxies is brighter along the semimajor axis compared to the semiminor axis. Spheroidal galaxies have hotter CGMs than disc galaxies, possibly due to their higher halo masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Urmila Chadayammuri, Akos Bogdan, Benjamin D. Oppenheimer, Ralph P. Kraft, William R. Forman, Christine Jones
Summary: By stacking observations of a large number of galaxies, scientists were able to study the properties of the extended circumgalactic medium (CGM) in both star-forming and quiescent galaxies and compare them with simulations. They found that the mass and star formation activity of galaxies affect the brightness of their extended CGM, but the observed brightness increases more slowly with stellar mass than predicted in simulations. Quiescent galaxies are dimmer than expected, suggesting they rely too heavily on CGM ejection to quench star formation. Star-forming galaxies have flatter and more extended profiles than simulated, indicating inefficient stellar feedback models.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Egidijus Kukstas, Michael L. Balogh, Ian G. McCarthy, Yannick M. Bahe, Gabriella De Lucia, Pascale Jablonka, Benedetta Vulcani, Devontae C. Baxter, Andrea Biviano, Pierluigi Cerulo, Jeffrey C. Chan, M. C. Cooper, Ricardo Demarco, Alexis Finoguenov, Andreea S. Font, Chris Lidman, Justin Marchioni, Sean McGee, Adam Muzzin, Julie Nantais, Lyndsay Old, Irene Pintos-Castro, Bianca Poggianti, Andrew M. M. Reeves, Gregory Rudnick, Florian Sarron, Remco van der Burg, Kristi Webb, Gillian Wilson, Howard K. C. Yee, Dennis Zaritsky
Summary: Recent observations have shown that the environmental quenching of galaxies at z ≈ 1 is different from that in the local Universe. However, the physical origin of these differences is still unclear. In this study, we compare three state-of-the-art simulations with observations to gain insight into the evolution of environmental quenching. We find that while the simulations generally reproduce the stellar content of galaxies in the field, they struggle to capture the observed quenching of satellites in the cluster environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Syeda Lammim Ahad, Yannick M. Bahe, Henk Hoekstra
Summary: The study explores the challenges in detecting and interpreting the diffuse light within galaxy groups and clusters. It finds that the brightest galaxy in a group is not always at the center of the gravitational potential, leading to potential miscentring. However, this miscentring has minimal impact on the average mass density and surface brightness profiles.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Edoardo Altamura, Scott T. Kay, Richard G. Bower, Matthieu Schaller, Yannick M. Bahe, Joop Schaye, Josh Borrow, Imogen Towler
Summary: Recent cosmological simulations predict high entropy levels in the intra-cluster medium, contradicting X-ray observations. This study investigates the impact of different sub-grid models on the central entropy and profile shape in zoom-in cosmological simulations using the EAGLE galaxy formation model. The results indicate that changes in the sub-grid models can affect the entropy levels and profile shape.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Philip F. Hopkins, Iryna S. Butsky, Suoqing Ji, Dusan Keres
Summary: Recent numerical studies suggest that cosmic rays (CRs) from supernovae (SNe) or active galactic nuclei (AGNs) may have a significant impact on galaxy formation by establishing a CR-pressure-dominated circumgalactic medium (CGM). However, explicit CR-magnetohydrodynamics (CR-MHD) simulations are computationally expensive and it is unclear whether these results apply to simulations without explicit treatment of magnetic fields or resolved interstellar medium phase structure. In this study, we propose a simplified 'sub-grid' model for CRs that captures the key qualitative behaviors of interest for simulations or semi-analytical models, while imposing minimal computational overhead.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Iryna S. Butsky, Shreya Nakum, Sam B. Ponnada, Cameron B. Hummels, Suoqing Ji, Philip F. Hopkins
Summary: Recent theoretical studies suggest that the circumgalactic medium (CGM) surrounding low-redshift L galaxies may have significant non-thermal pressure support in the form of cosmic rays. However, the specific model of cosmic ray transport employed in these predictions lacks theoretical and observational constraints. This work proposes a new observational constraint for calculating the lower limit of the effective cosmic ray transport rate, demonstrating a relationship between the transport rate and observable galaxy properties. The findings suggest strong evidence for an effective transport rate in the diffuse CGM.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
