Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Miranda, Vívian"'
Autor:
Eifler, Tim, Fang, Xiao, Krause, Elisabeth, Hirata, Christopher M., Xu, Jiachuan, Benabed, Karim, Ferraro, Simone, Miranda, Vivian, S., Pranjal R., Ayçoberry, Emma, Dubois, Yohan
We explore synergies between the Nancy Grace Roman Space Telescope High Latitude Wide Area Survey (HLWAS) and CMB experiments, specifically Simons Observatory (SO) and CMB-Stage4 (S4). Our simulated analyses include weak lensing, photometric galaxy c
Externí odkaz:
http://arxiv.org/abs/2411.04088
Autor:
Aires, Abdias, Kokron, Nickolas, Rosenfeld, Rogerio, Andrade-Oliveira, Felipe, Miranda, Vivian
Stage-IV galaxy surveys will measure correlations at small cosmological scales with high signal-to-noise ratio. One of the main challenges of extracting information from small scales is devising accurate models, as well as characterizing the theoreti
Externí odkaz:
http://arxiv.org/abs/2410.08930
Baryonic Acoustic Oscillation (BAO) data from the Dark Energy Spectroscopic Instrument (DESI), in combination with Cosmic Microwave Background (CMB) data and Type Ia Supernovae (SN) luminosity distances, suggests a dynamical evolution of the dark ene
Externí odkaz:
http://arxiv.org/abs/2408.14628
Quintessence scalar fields are a natural candidate for evolving dark energy. Unlike the phenomenological $w_0w_a$ parameterization of the dark energy equation of state, they cannot accommodate the phantom regime of dark energy $w(z) < -1$, or crossin
Externí odkaz:
http://arxiv.org/abs/2404.14341
Autor:
Gordon, Jonathan, de Aguiar, Bernardo F., Rebouças, João, Brando, Guilherme, Falciano, Felipe, Miranda, Vivian, Koyama, Kazuya, Winther, Hans A.
Year 1 results of the Legacy Survey of Space and Time (LSST) will provide tighter constraints on small-scale cosmology, beyond the validity of linear perturbation theory. This heightens the demand for a computationally affordable prescription that ca
Externí odkaz:
http://arxiv.org/abs/2404.12344
Autor:
Kable, Joshua A., Miranda, Vivian
Publikováno v:
JCAP 10 (2024) 011
We assess the consistency of cosmological models that alter the size of the sound horizon at last scattering to resolve the Hubble tension with data from ACT + Planck CMB lensing, Big Bang Nucleosynthesis, and supernova data from Pantheon or Pantheon
Externí odkaz:
http://arxiv.org/abs/2403.11916
Autor:
Boruah, Supranta S., Eifler, Tim, Miranda, Vivian, Farah, Elyas, Motka, Jay, Krause, Elisabeth, Fang, Xiao, Rogozenski, Paul, Collaboration, The LSST Dark Energy Science
Validating modeling choices through simulated analyses and quantifying the impact of different systematic effects will form a major computational bottleneck in the preparation for 3$\times$2 analysis with Stage-IV surveys such as Vera Rubin Observato
Externí odkaz:
http://arxiv.org/abs/2403.11797
Autor:
Saraivanov, Evan, Zhong, Kunhao, Miranda, Vivian, Boruah, Supranta S., Eifler, Tim, Krause, Elisabeth
The next generation of cosmological surveys is expected to generate unprecedented high-quality data, consequently increasing the already substantial computational costs of Bayesian statistical methods. This will pose a significant challenge to analyz
Externí odkaz:
http://arxiv.org/abs/2403.12337
Autor:
Zhong, Kunhao, Saraivanov, Evan, Caputi, James, Miranda, Vivian, Boruah, Supranta S., Eifler, Tim, Krause, Elisabeth
We present a new class of machine-learning emulators that accurately model the cosmic shear, galaxy-galaxy lensing, and galaxy clustering real space correlation functions in the context of Rubin Observatory year one simulated data. To illustrate its
Externí odkaz:
http://arxiv.org/abs/2402.17716
In this work, we quantify the cosmological signatures of dark energy radiation -- a novel description of dark energy, which proposes that the dynamical component of dark energy is comprised of a thermal bath of relativistic particles sourced by therm
Externí odkaz:
http://arxiv.org/abs/2311.08638