Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Miranda, Vivian"'
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
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$2 analysis with Stage-IV surveys such as Vera Rubin Observato
Externí odkaz:
http://arxiv.org/abs/2403.11797
Autor:
Saraivanov, Evan, Zhong, Kunhao, Miranda, Vivian, Boruah, Supranta S., Eifler, Tim, Krause, Elisabeth
The next generation of cosmological surveys is expected to generate unprecedented high-quality data, consequently increasing the already substantial computational costs of Bayesian statistical methods. This will pose a significant challenge to analyz
Externí odkaz:
http://arxiv.org/abs/2403.12337
Autor:
Zhong, Kunhao, Saraivanov, Evan, Caputi, James, Miranda, Vivian, Boruah, Supranta S., Eifler, Tim, Krause, Elisabeth
We present a new class of machine-learning emulators that accurately model the cosmic shear, galaxy-galaxy lensing, and galaxy clustering real space correlation functions in the context of Rubin Observatory year one simulated data. To illustrate its
Externí odkaz:
http://arxiv.org/abs/2402.17716
In this work, we quantify the cosmological signatures of dark energy radiation -- a novel description of dark energy, which proposes that the dynamical component of dark energy is comprised of a thermal bath of relativistic particles sourced by therm
Externí odkaz:
http://arxiv.org/abs/2311.08638
Autor:
Xu, Jiachuan, Eifler, Tim, Miranda, Vivian, Fang, Xiao, Saraivanov, Evan, Krause, Elisabeth, Huang, Hung-Jin, Benabed, Karim, Zhong, Kunhao
We constrain cosmology and baryonic feedback scenarios with a joint analysis of weak lensing, galaxy clustering, cosmic microwave background (CMB) lensing, and their cross-correlations (so-called 6$\times$2) using data from the Dark Energy Survey (DE
Externí odkaz:
http://arxiv.org/abs/2311.08047
Cosmology from weak lensing, galaxy clustering, CMB lensing and tSZ: I. 10x2pt Modelling Methodology
Autor:
Fang, Xiao, Krause, Elisabeth, Eifler, Tim, Ferraro, Simone, Benabed, Karim, S., Pranjal R., Ayçoberry, Emma, Dubois, Yohan, Miranda, Vivian
The overlap of galaxy surveys and CMB experiments presents an ideal opportunity for joint cosmological dataset analyses. In this paper we develop a halo-model-based method for the first joint analysis combining these two experiments using 10 correlat
Externí odkaz:
http://arxiv.org/abs/2308.01856
Autor:
Rebouças, João, Gordon, Jonathan, de Souza, Diogo H. F., Zhong, Kunhao, Miranda, Vivian, Rosenfeld, Rogerio, Eifler, Tim, Krause, Elisabeth
Publikováno v:
JCAP02(2024)042
Early dark energy (EDE) is an extension to the $\Lambda$CDM model, proposed to reduce the tension between the measurements of the Hubble constant $H_0$ from the cosmic microwave background (CMB) and from the local cosmic distance ladder. However, thi
Externí odkaz:
http://arxiv.org/abs/2302.07333