Zobrazeno 1 - 10
of 994
pro vyhledávání: '"Ely D"'
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138830- (2024)
Pulsar timing arrays (PTAs) are sensitive to oscillations in the gravitational potential along the line-of-sight due to ultralight particle pressure. We calculate the probing power of PTAs for ultralight bosons across all frequencies, from those larg
Externí odkaz:
https://doaj.org/article/1302a0cb54d9448c86353368c4e2e426
The cosmological 21-cm signal is sourced from hyperfine transitions in neutral hydrogen atoms. Yet, although hydrogen atoms belong to the sub-class of baryonic matter, it is customary to simplify their treatment and analyze the 21-cm signal as if all
Externí odkaz:
http://arxiv.org/abs/2411.00089
Early dark energy (EDE) is one of the leading models proposed to resolve the perplexing Hubble tension. Despite extensive scrutiny and testing against various observables, conclusive constraints remain elusive as we await new data. In this paper, we
Externí odkaz:
http://arxiv.org/abs/2410.22424
Early dark energy, an additional component of dark energy active in the decade of redshift before recombination, has emerged as one of the most effective models at reducing the $H_0$ tension between direct measurement of the Hubble parameter $H_0$ in
Externí odkaz:
http://arxiv.org/abs/2410.21459
We use a combination of high-redshift observables to extract the strongest constraints to date on the fraction of axion fuzzy dark matter (FDM) in the mass window $10^{-26}\,\mathrm{eV}\!\lesssim\! m_\mathrm{FDM}\!\lesssim\!10^{-23}\,\mathrm{eV}$. Th
Externí odkaz:
http://arxiv.org/abs/2407.19549
Autor:
Libanore, Sarah, Kovetz, Ely D.
Decaying dark matter (DDM) can be tested via different astrophysical and cosmological probes. In particular, particles in the $\sim$ 9.5 - 30 eV mass range that decay into monochromatic photons, would contribute to the extragalactic background light
Externí odkaz:
http://arxiv.org/abs/2404.01500
Autor:
Libanore, Sarah, Kovetz, Ely D.
Publikováno v:
A&A 687, A133 (2024)
The Extragalactic Background Light (EBL) carries a huge astrophysical and cosmological content: its frequency spectrum and redshift evolution are determined by the integrated emission of unresolved sources, these being galaxies, active galactic nucle
Externí odkaz:
http://arxiv.org/abs/2401.12285
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 532, Issue 1, July 2024, Pages 149-163
Different star-formation models at Cosmic Dawn produce detectable signatures in the observables of upcoming 21-cm experiments. In this work, we consider the physical scenario of feedback-free starbursts (FFB), according to which the star-formation ef
Externí odkaz:
http://arxiv.org/abs/2310.03021
Autor:
Flitter, Jordan, Kovetz, Ely D.
In a companion paper we introduce 21cmFirstCLASS, a new code for computing the 21-cm anisotropies, assembled from the merger of the two popular codes 21cmFAST and CLASS. Unlike the standard 21cmFAST, which begins at $z=35$ with homogeneous temperatur
Externí odkaz:
http://arxiv.org/abs/2309.03948
Autor:
Flitter, Jordan, Kovetz, Ely D.
In this work we present 21cmFirstCLASS, a modified version of 21cmFAST, the most popular code in the literature for computing the anisotropies of the 21-cm signal. Our code uses the public cosmic microwave background (CMB) Boltzmann code CLASS, to es
Externí odkaz:
http://arxiv.org/abs/2309.03942