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Simulating the 21 cm forest detectable with LOFAR and SKA in the spectra of high-zGRBs

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posted on 2023-06-09, 07:02 authored by B Ciardi, S Inoue, F B Abdalla, K Asad, G Bernardi, J S Bolton, M Brentjens, A G de Bruyn, E Chapman, Ilian IlievIlian Iliev, et al
We investigate the feasibility of detecting 21 cm absorption features in the afterglow spectra of high redshift long Gamma Ray Bursts (GRBs). This is done employing simulations of cosmic reionization, together with estimates of the GRB radio afterglow flux and the instrumental characteristics of the LOw Frequency ARray (LOFAR). We find that absorption features could be marginally (with a S/N larger than a few) detected by LOFAR at z ? 7 if the GRB is a highly energetic event originating from Pop III stars, while the detection would be easier if the noise were reduced by one order of magnitude, i.e. similar to what is expected for the first phase of the Square Kilometre Array (SKA1-low). On the other hand, more standard GRBs are too dim to be detected even with ten times the sensitivity of SKA1-low, and only in the most optimistic case can a S/N larger than a few be reached at z ? 9.

Funding

Additional AGP funding - supplementary to Sussex Consolidated Grant ST/L000652/1; G1443; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M003574/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press

Issue

1

Volume

453

Page range

101-105

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Astronomy Centre Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-07-06

First Open Access (FOA) Date

2017-07-06

First Compliant Deposit (FCD) Date

2017-07-06

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