Microquasars as heating sources of the intergalactic medium during reionization of the Universe

Douna, V.; Pellizza, L. J.; Laurent, Philippe; Mirabel, I. F.

doi:10.1093/mnras/stx2983

Cited by 20 publications

(21 citation statements)

References 90 publications

(129 reference statements)

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“…However, most recent works have focused on semi-numerical (see e.g. Santos et al 2010;Mesinger et al 2013;Fialkov et al 2014;Knevitt et al 2014;Ghara et al 2016Ghara et al , 2017Greig & Mesinger 2018;Das et al 2017;Douna et al 2018) and numerical (eg. Xu et al 2014;Ahn et al 2015a;Ross et al 2017) modeling.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the QSO contribution to the 21-cm signal from the Cosmic Dawn

Ross

Dixon

Ghara

et al. 2019

Monthly Notices of the Royal Astronomical Society

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The upcoming radio interferometer Square Kilometre Array (SKA) is expected to directly detect the redshifted 21-cm signal from the neutral hydrogen present during the Cosmic Dawn. Temperature fluctuations from X-ray heating of the neutral intergalactic medium can dominate the fluctuations in the 21-cm signal from this time. This heating depends on the abundance, clustering, and properties of the X-ray sources present, which remain highly uncertain. We present a suite of three new large-volume, 349 Mpc a side, fully numerical radiative transfer simulations including QSO-like sources, extending the work previously presented in Ross et al. (2017). The results show that our QSOs have a modest contribution to the heating budget, yet significantly impact the 21-cm signal. Initially, the power spectrum is boosted on large scales by heating from the biased QSO-like sources, before decreasing on all scales. Fluctuations from images of the 21-cm signal with resolutions corresponding to SKA1-Low at the appropriate redshifts are well above the expected noise for deep integrations, indicating that imaging could be feasible for all the X-ray source models considered. The most notable contribution of the QSOs is a dramatic increase in non-Gaussianity of the signal, as measured by the skewness and kurtosis of the 21-cm probability distribution functions. However, in the case of late Lyman-α saturation, this non-Gaussianity could be dramatically decreased particularly when heating occurs earlier. We conclude that increased non-Gaussianity is a promising signature of rare X-ray sources at this time, provided that Lyman-α saturation occurs before heating dominates the 21-cm signal.

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Section: Introductionmentioning

confidence: 99%

Evaluating the QSO contribution to the 21-cm signal from the Cosmic Dawn

Ross

Dixon

Ghara

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…High Mass X-ray Binaries (HMXBs) are systems composed of a compact object (neutron star NS, or black hole BH) and a massive companion star. Observational results have shown that HMXBs are good tracers of the star formation rate (SFR) within their host galaxies (Grimm et al 2003, Mineo et al 2012, and might be important heating and ionizing sources in the early Universe (e.g., Justham & Schawinski 2012, Artale et al 2015, Douna et al 2018, Garratt-Simthson et al 2018. From a theoretical point of view, studying the population of HMXBs within galaxies is essential to understand their role in the aforementioned processes and the binary evolution.…”

Section: Introductionmentioning

confidence: 99%

The High Mass X-ray binaries in star-forming galaxies

et al. 2018

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The high mass X-ray binaries (HMXBs) provide an exciting framework to investigate the evolution of massive stars and the processes behind binary evolution. HMXBs have shown to be good tracers of recent star formation in galaxies and might be important feedback sources at early stages of the Universe. Furthermore, HMXBs are likely the progenitors of gravitational wave sources (BH–BH or BH–NS binaries that may merge producing gravitational waves). In this work, we investigate the nature and properties of HMXB population in star-forming galaxies. We combine the results from the population synthesis model MOBSE (Giacobbo & Mapelli 2018a) together with galaxy catalogs from EAGLE simulation (Schaye et al. 2015). Therefore, this method describes the HMXBs within their host galaxies in a self-consistent way. We compute the X-ray luminosity function (XLF) of HMXBs in star-forming galaxies, showing that this methodology matches the main features of the observed XLF.

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“…Following that work Tueros et al (2014) proposed that microquasar jets contribute to the reionization of the IGM at cosmic dawn. More recently, Douna et al (2018) by Monte Carlo simulations find that the contribution of microquasar jets to the heating of the IGM is of the same order of magnitude as that of cosmic rays from SNe.…”

Section: Hmxbs In the Heating And Reionization Epochs: X-raysmentioning

confidence: 99%

Black hole high mass X-ray binary microquasars at cosmic dawn

Mirabel

2018

Proc. IAU

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Theoretical models and observations suggest that primordial Stellar Black Holes (Pop-III-BHs) were prolifically formed in HMXBs, which are powerful relativistic jet sources of synchrotron radiation called Microquasars (MQs).Large populations of BH-HMXB-MQs at cosmic dawn produce a smooth synchrotron cosmic radio background (CRB) that could account for the excess amplitude of atomic hydrogen absorption at z∼17, recently reported by EDGES.BH-HMXB-MQs at cosmic dawn precede supernovae, neutron stars and dust. BH-HMXB-MQs promptly inject into the IGM hard X-rays and relativistic jets, which overtake the slowly expanding HII regions ionized by progenitor Pop-III stars, heating and partially ionizing the IGM over larger distance scales.BH-HMXBs are channels for the formation of Binary-Black-Holes (BBHs). The large masses of BBHs detected by gravitational waves, relative to the masses of BHs detected by X-rays, and the high rates of BBH-mergers, are consistent with high formation rates of BH-HMXBs and BBHs in the early universe.

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Microquasars as heating sources of the intergalactic medium during reionization of the Universe

Cited by 20 publications

References 90 publications

Evaluating the QSO contribution to the 21-cm signal from the Cosmic Dawn

Evaluating the QSO contribution to the 21-cm signal from the Cosmic Dawn

The High Mass X-ray binaries in star-forming galaxies

Black hole high mass X-ray binary microquasars at cosmic dawn

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