36 citations · 123 across the 14 of their papers we have counts for
14 papers
High-Redshift Signatures from the Cosmic Dawn and the Epoch of Reionization
Rennan Barkana, Oliver Basquette, Ankita Bera +22
In this chapter, we provide a comprehensive overview of the astrophysical and cosmological processes that shape the 21-cm signal during Cosmic Dawn and the Epoch of Reionization. W…
Square Kilometre Array Science Data Challenge 3a: foreground removal for an EoR experiment
A. Bonaldi, P. Hartley, R. Braun +179
We present and analyse the results of the Science data challenge 3a (SDC3a, https://sdc3.skao.int/challenges/foregrounds), an EoR foreground-removal community-wide exercise organis…
Dark age consistency in the 21cm global signal
Fumiya Okamatsu, Teppie Minoda, Tomo Takahashi +2
We propose a new observable for the 21cm global signal during the dark ages, the dark-age consistency ratio, which is motivated from the fact that the shape of the functional form…
EDGES and JWST with 21cm global signal emulator
Shintaro Yoshiura, Teppei Minoda, Tomo Takahashi
The 21cm global signal is an important probe to reveal the properties of the first astrophysical objects and the processes of the structure formation from which one can constrain a…
Impact of the primordial fluctuation power spectrum on the reionization history
Teppei Minoda, Shintaro Yoshiura, Tomo Takahashi
We argue that observations of the reionization history can be used as a probe of primordial density fluctuations, particularly on small scales. Although the primordial curvature pe…
Probing the primordial Universe with 21-cm line from cosmic dawn/epoch of reionization
Teppei Minoda, Shohei Saga, Tomo Takahashi +4
In the most distant reaches of the Universe, the 21-cm hyperfine transition in neutral hydrogen provides one of the only available tracers of large-scale structure. A number of ins…
Constraints on the phase transition of Early Dark Energy with the CMB anisotropies
Shintaro Hayashi, Teppei Minoda, Kiyotomo Ichiki
Early dark energy (EDE) models have attracted attention in the context of the recent problem of the Hubble tension. Here we extend these models by taking into account the new densi…
Probing isocurvature perturbations with 21-cm global signal in the light of HERA result
Teppei Minoda, Shintaro Yoshiura, Tomo Takahashi
We argue that the 21-cm global signal can be a powerful probe of isocurvature perturbations, particularly for the ones with blue-tilted spectra. Although the 21-cm global signal is…
Free-free background radiation from accreting primordial black holes
Hiroyuki Tashiro, Katsuya T. Abe, Teppei Minoda
Baryonic gas falling onto a primordial black hole (PBH) emits photons via the free-free process. These photons can contribute the diffuse free-free background radiation in the freq…
Constraint on the early-formed dark matter halos using the free-free emission in the Planck foreground analysis
Katsuya T. Abe, Teppei Minoda, Hiroyuki Tashiro
We provide a new constraint on the small-scale density fluctuations, evaluating the diffuse background free-free emission from dark matter halos in the dark ages. If there exists a…
Small-scale CMB anisotropies induced by the primordial magnetic fields
Teppei Minoda, Kiyotomo Ichiki, Hiroyuki Tashiro
The primordial magnetic fields (PMFs) produced in the early universe are expected to be the origin of the large-scale cosmic magnetic fields. The PMFs are considered to leave a foo…
Thermal Sunyaev-Zel'dovich Effect in the IGM due to Primordial Magnetic Fields
Teppei Minoda, Kenji Hasegawa, Hiroyuki Tashiro +2
In the present universe, magnetic fields exist with various strengths and on various scales. One possible origin of these cosmic magnetic fields is the primordial magnetic fields (…
Insight into primordial magnetic fields from 21-cm line observation with EDGES experiment
Teppei Minoda, Hiroyuki Tashiro, Tomo Takahashi
The recent observation of the 21-cm global absorption signal by EDGES suggests that the intergalactic medium (IGM) gas has been cooler than the cosmic microwave background during $…
Thermal Sunyaev-Zel'dovich effect in the intergalactic medium with primordial magnetic fields
Teppei Minoda, Kenji Hasegawa, Hiroyuki Tashiro +2
The presence of ubiquitous magnetic fields in the universe is suggested from observations of radiation and cosmic ray from galaxies or the intergalactic medium (IGM). One possible…