Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Obuljen, Andrej"'
We explore full-shape analysis with simulation-based priors, which is the simplest approach to galaxy clustering data analysis that combines effective field theory (EFT) on large scales and numerical simulations on small scales. The core ingredient o
Externí odkaz:
http://arxiv.org/abs/2409.10609
High-number-density tracers of large-scale structure, such as the HI-rich galaxies measured by 21 cm intensity mapping, have low sampling noise, making them particularly promising as cosmological probes. At large scales, this sampling noise can be su
Externí odkaz:
http://arxiv.org/abs/2405.18559
Autor:
Ivanov, Mikhail M., Cuesta-Lazaro, Carolina, Mishra-Sharma, Siddharth, Obuljen, Andrej, Toomey, Michael W.
Perturbative, or effective field theory (EFT)-based, full-shape analyses of galaxy clustering data involve ``nuisance parameters'' to capture various observational effects such as the galaxy-dark matter connection (galaxy bias). We present an efficie
Externí odkaz:
http://arxiv.org/abs/2402.13310
We use an analytical forward model based on perturbation theory to predict the neutral hydrogen (HI) overdensity maps at low redshifts. We investigate its performance by comparing it directly at the field level to the simulated HI from the IllustrisT
Externí odkaz:
http://arxiv.org/abs/2207.12398
Autor:
Obuljen, Andrej, Percival, Will J.
A typical galaxy survey geometry results in galaxy pairs of different separation and angle to the line-of-sight having different distributions in redshift and consequently a different effective redshift. However, clustering measurements are analysed
Externí odkaz:
http://arxiv.org/abs/2104.07022
We present evidence of anisotropic galaxy assembly bias in the Baryon Oscillation Spectroscopic Survey Data Release 12 galaxy sample at a level exceeding $5\sigma$. We use measurements of the line-of-sight velocity dispersion $\sigma_\star$ and stell
Externí odkaz:
http://arxiv.org/abs/2004.07240
Autor:
Castorina, Emanuele, Foreman, Simon, Karagiannis, Dionysios, Liu, Adrian, Masui, Kiyoshi W., Meerburg, Pieter D., Newburgh, Laura B., O'Connor, Paul, Obuljen, Andrej, Padmanabhan, Hamsa, Shaw, J. Richard, Slosar, Anže, Stankus, Paul, Timbie, Peter T., Wallisch, Benjamin, White, Martin
The Packed Ultra-wideband Mapping Array (PUMA) is a proposed low-resolution transit interferometric radio telescope operating over the frequency range 200 - 1100MHz. Its rich science portfolio will include measuring structure in the universe from red
Externí odkaz:
http://arxiv.org/abs/2002.05072
Autor:
Villaescusa-Navarro, Francisco, Hahn, ChangHoon, Massara, Elena, Banerjee, Arka, Delgado, Ana Maria, Ramanah, Doogesh Kodi, Charnock, Tom, Giusarma, Elena, Li, Yin, Allys, Erwan, Brochard, Antoine, Uhlemann, Cora, Chiang, Chi-Ting, He, Siyu, Pisani, Alice, Obuljen, Andrej, Feng, Yu, Castorina, Emanuele, Contardo, Gabriella, Kreisch, Christina D., Nicola, Andrina, Alsing, Justin, Scoccimarro, Roman, Verde, Licia, Viel, Matteo, Ho, Shirley, Mallat, Stephane, Wandelt, Benjamin, Spergel, David N.
Publikováno v:
APJS, 250, 2, (2020)
The Quijote simulations are a set of 44,100 full N-body simulations spanning more than 7,000 cosmological models in the $\{\Omega_{\rm m}, \Omega_{\rm b}, h, n_s, \sigma_8, M_\nu, w \}$ hyperplane. At a single redshift the simulations contain more th
Externí odkaz:
http://arxiv.org/abs/1909.05273
Autor:
Ahmed, Zeeshan, Alonso, David, Amin, Mustafa A., Ansari, Réza, Arena, Evan J., Bandura, Kevin, Beardsley, Adam, Bull, Philip, Castorina, Emanuele, Chang, Tzu-Ching, Davé, Romeel, Dillon, Joshua S., van Engelen, Alexander, Ewall-Wice, Aaron, Ferraro, Simone, Foreman, Simon, Frisch, Josef, Green, Daniel, Holder, Gilbert, Jacobs, Daniel, Karagiannis, Dionysios, Kaurov, Alexander A., Knox, Lloyd, Kuhn, Emily, Liu, Adrian, Ma, Yin-Zhe, Masui, Kiyoshi W., McClintock, Thomas, Moodley, Kavilan, Münchmeyer, Moritz, Newburgh, Laura B., Nomerotski, Andrei, O'Connor, Paul, Obuljen, Andrej, Padmanabhan, Hamsa, Parkinson, David, Perdereau, Olivier, Rapetti, David, Saliwanchik, Benjamin, Sehgal, Neelima, Shaw, J. Richard, Sheehy, Chris, Sheldon, Erin, Shirley, Raphael, Silverstein, Eva, Slatyer, Tracy, Slosar, Anže, Stankus, Paul, Stebbins, Albert, Timbie, Peter, Tucker, Gregory S., Tyndall, William, Villaescusa-Navarro, Francisco, Wulf, Dallas
Development of the hardware, data analysis, and simulation techniques for large compact radio arrays dedicated to mapping the 21 cm line of neutral hydrogen gas has proven to be more difficult than imagined twenty years ago when such telescopes were
Externí odkaz:
http://arxiv.org/abs/1907.13090
Autor:
Bandura, Kevin, Castorina, Emanuele, Connor, Liam, Foreman, Simon, Green, Daniel, Karagiannis, Dionysios, Liu, Adrian, Masui, Kiyoshi W., Meerburg, Daan, Münchmeyer, Moritz, Newburgh, Laura B., Ng, Cherry, O'Connor, Paul, Obuljen, Andrej, Padmanabhan, Hamsa, Saliwanchik, Benjamin, Shaw, J. Richard, Sheehy, Christopher, Stankus, Paul, Slosar, Anže, Stebbins, Albert, Timbie, Peter T., Tyndall, William, Villaescusa-Navarro, Francisco, Wallisch, Benjamin, White, Martin
PUMA is a proposal for an ultra-wideband, low-resolution and transit interferometric radio telescope operating at $200-1100\,\mathrm{MHz}$. Its design is driven by six science goals which span three science themes: the physics of dark energy (measuri
Externí odkaz:
http://arxiv.org/abs/1907.12559