Black holes at cosmic dawn in the redshifted 21cm signal of HI

Mirabel, I. F.; Rodríguez, Luis F.

doi:10.1016/j.newar.2022.101642

Cited by 6 publications

(3 citation statements)

References 225 publications

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“…Indeed, these two topics are not independent. A new research window has been opened to test whether supermassive BHs at large redshifts may boost the star formation in the early Universe (Mirabel & Rodríguez 2022).…”

Section: Inference For the Cosmological Distribution Of The Black Holesmentioning

confidence: 99%

Probing Electromagnetic Gravitational-wave Emission Coincidence in a Type I Binary-driven Hypernova Family of Long Gamma-Ray Bursts at Very High Redshift

Bianco,

Mirtorabi,

Moradi

et al. 2024

ApJ

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The repointing time of the X-Ray Telescope (XRT) instrument on the Neil Gehrels Swift Observatory satellite has posed challenges in observing and studying the early X-ray emissions within ≈40 s after a gamma-ray burst (GRB) trigger. To address this issue, we adopt a novel approach that capitalizes on the cosmological time dilation in GRBs with redshifts ranging from 3 to 9. Applying this strategy to Swift/XRT data, we investigate the earliest X-ray emissions of 368 GRBs from the Swift catalog, including short and long GRBs. We compare the observed time delay between the GRB trigger and the initial Swift/XRT observation, measured in the GRB observer frame, and the corresponding cosmological rest-frame time delay (RTD). This technique is here used in the analysis of GRB 090423 at z = 8.233 (RTD ∼8.2 s), GRB 090429B at z ≈ 9.4 (RTD ∼10.1 s), and GRB 220101A at z = 4.61 (RTD ∼14.4 s). The cosmological time dilation enables us to observe the very early X-ray afterglow emission in these three GRBs. We thus validate the observation of the collapse of the carbon–oxygen core and the coeval newborn neutron star (νNS) formation triggering the GRB event in the binary-driven hypernova (BdHN) scenario. We also evidence the νNS spin-up due to supernova ejecta fallback and its subsequent slowing down due to the X-ray/optical/radio synchrotron afterglow emission. A brief gravitational-wave signal may separate the two stages owing to a fast-spinning νNS triaxial-to-axisymmetric transition. We also analyze the long GRB redshift distribution for the different BdHN types and infer that BdHNe II and III may originate the NS binary progenitors of short GRBs.

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Section: Inference For the Cosmological Distribution Of The Black Holesmentioning

confidence: 99%

Probing Electromagnetic Gravitational-wave Emission Coincidence in a Type I Binary-driven Hypernova Family of Long Gamma-Ray Bursts at Very High Redshift

Bianco,

Mirtorabi,

Moradi

et al. 2024

ApJ

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“…Observations have ruled out a large signal from the cosmic filamentary structure (Vernstrom et al 2017). Other important constraints come from considering that the presence of a significant radio background at the redshifts of reionization could have a dramatic effect on the observed H I 21 cm absorption trough as discussed in Feng & Holder (2018), Ewall-Wice et al (2018), Mirocha & Furlanetto (2018), Fialkov & Barkana (2019), Mondal et al (2020), Natwariya (2021), Mirabel & Rodriguez (2022), and here in Section 4.19.…”

Section: Scientific Overviewmentioning

confidence: 99%

The Second Radio Synchrotron Background Workshop: Conference Summary and Report

Singal

Fornengo

Regis

et al. 2023

PASP

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We summarize the second radio synchrotron background workshop, which took place on 2022 June 15–17 in Barolo, Italy. This meeting was convened because available measurements of the diffuse radio zero level continue to suggest that it is several times higher than can be attributed to known Galactic and extragalactic sources and processes, rendering it the least well-understood electromagnetic background at present and a major outstanding question in astrophysics. The workshop agreed on the next priorities for investigations of this phenomenon, which include searching for evidence of the radio Sunyaev–Zel’dovich effect, carrying out cross-correlation analyses of radio emission with other tracers, and supporting the completion of the 310 MHz absolutely calibrated sky map project.

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“…Although the existence of this deep absorption signal is still debated, the scenario that at Cosmic Dawn there is an extra radio background and its impact on the 21-cm global spectrum is nevertheless an interesting and novel perspective. Many objects may produce an extra CRB at Cosmic Dawn, for example the first galaxies in small halos with high efficiency of star formation and radio production [21], dark matter annihilations [22], the first black holes [20,23], and the primordial black holes (PBHs).…”

Section: Introductionmentioning

confidence: 99%

Cosmic Radio Background from Primordial Black Holes at Cosmic Dawn

Zhang¹,

Yue²,

Xu³

et al. 2023

Preprint

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The presence of an extra radio background besides the cosmic microwave background has important implications for the observation of the 21-cm signal during the cosmic Dark Ages, Cosmic Dawn, and epoch of Reionization. The strong absorption trough found in the 21-cm global spectrum measured by the EDGES experiment, which has a much greater depth than the standard model prediction, has drawn great interest to this scenario, but more generally it is still of great interest to consider such a cosmic radio background (CRB) in the early Universe. To be effective in affecting the 21-cm signal at early time, such a radio background must be produced by sources which can emit strong radio signals but modest amount of X-rays, so that the gas is not heated up too early. We investigate the scenario that such a radio background is produced by the primordial black holes (PBHs). For PBH with a single mass, we find that if the PBHs' abundance log(fPBH) (ratio of total PBH mass density to total matter density) and mass satisfy the relation log(fPBH) ∼ −1.8 log(M•/M⊙) − 3.5 for 1 M⊙ M• 300M⊙, and have jet emission, they can generate a CRB required for reproducing the 21-cm absorption signal seen by the EDGES. The accretion rate can be boosted if the PBHs are surrounded by dark matter halos, which permits lower fPBH value to satisfy the EDGES observation. In the latter scenario, since the accretion rate can evolve rapidly during the Cosmic Dawn, the frequency (redshift) and depth of the absorption trough can determine the mass and abundance of the PBHs simultaneously. For absorption trough redshift ∼ 17 and depth ∼ −500 mK, it corresponds to M• ∼ 1.05 M⊙ and fPBH ∼ 1.5 × 10 −4 .

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Black holes at cosmic dawn in the redshifted 21cm signal of HI

Cited by 6 publications

References 225 publications

Probing Electromagnetic Gravitational-wave Emission Coincidence in a Type I Binary-driven Hypernova Family of Long Gamma-Ray Bursts at Very High Redshift

Probing Electromagnetic Gravitational-wave Emission Coincidence in a Type I Binary-driven Hypernova Family of Long Gamma-Ray Bursts at Very High Redshift

The Second Radio Synchrotron Background Workshop: Conference Summary and Report

Cosmic Radio Background from Primordial Black Holes at Cosmic Dawn

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