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

Schaye, J.; Jeli?, V.; Bolton, J. S.; Ciardi, B.; Inoue, S.; Abdalla, F. B.; Asad, K.; Bernardi, G.; Bolton, James S.; Brentjens, M.; de Bruyn, A. G.; Chapman, E.; Daiboo, S.; Fernandez, E. R.; Ghosh, A.; Graziani, L.; Harker, G. J. A.; Iliev, I. T.; Jelic, V.; Jensen, H.; Kazemi, S.; Koopmans, L. V. E.; Martinez, O.; Maselli, A.; Mellema, G.; Offringa, A. R.; Pandey, V. N.; Schaye, Joop; Thomas, R.; Vedantham, H.; Yatawatta, S.; Zaroubi, S.

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


J. Schaye

V. Jeli?

B. Ciardi

S. Inoue

F. B. Abdalla

K. Asad

G. Bernardi

James S. Bolton

M. Brentjens

A. G. de Bruyn

E. Chapman

S. Daiboo

E. R. Fernandez

A. Ghosh

L. Graziani

G. J. A. Harker

I. T. Iliev

V. Jelic

H. Jensen

S. Kazemi

L. V. E. Koopmans

O. Martinez

A. Maselli

G. Mellema

A. R. Offringa

V. N. Pandey

Joop Schaye

R. Thomas

H. Vedantham

S. Yatawatta

S. Zaroubi


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.


Schaye, J., Jelić, V., Bolton, J. S., Ciardi, B., Inoue, S., Abdalla, F. B., …Zaroubi, S. (2015). Simulating the 21cm forest detectable with LOFAR and SKA in the spectra of high-zGRBs. Monthly Notices of the Royal Astronomical Society, 453(1), 101-105.

Journal Article Type Article
Acceptance Date Jul 13, 2015
Online Publication Date Aug 12, 2015
Publication Date Oct 11, 2015
Deposit Date May 4, 2017
Publicly Available Date May 4, 2017
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 453
Issue 1
Pages 101-105
Keywords gamma-ray burst: general, dark ages, reionization, first stars, radio lines: general
Public URL
Publisher URL
Additional Information © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society


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