2021MNRAS.502.5981D

Query : 2021MNRAS.502.5981D

2021MNRAS.502.5981D - Mon. Not. R. Astron. Soc., 502, 5981-5996 (2021/April-3)

Probing the physical properties of the intergalactic medium using gamma-ray bursts.

DALTON T., MORRIS S.L. and FUMAGALLI M.

Abstract (from CDS):

We use gamma-ray burst (GRB) spectra total continuum absorption to estimate the key intergalactic medium (IGM) properties of hydrogen column density (NHXIGM), metallicity, temperature, and ionization parameter over a redshift range of 1.6 <= z <= 6.3, using photoionization equilibrium (PIE) and collisional ionization equilibrium (CIE) models for the ionized plasma. We use more realistic host metallicity, dust corrected where available, in generating the host absorption model, assuming that the host intrinsic hydrogen column density is equal to the measured ionization corrected intrinsic neutral column from UV spectra (NHI,IC). We find that the IGM property results are similar, regardless of whether the model assumes all PIE or CIE. The NHXIGM scales as (1 + z)1.0–1.9, with equivalent hydrogen mean density at z = 0 of n0=1.8+1.5–1.2 ×10–7 cm–3. The metallicity ranges from ∼0.1 Z☉ at redshift z ∼ 2 to ∼0.001 Z☉ at redshift z > 4. The PIE model implies a less rapid decline in average metallicity with redshift compared to CIE. Under CIE, the temperature ranges between 5.0 < log (T/K) < 7.1. For PIE the ionization parameter ranges between 0.1 < log (ξ) < 2.9. Using our model, we conclude that the IGM contributes substantially to the total absorption seen in GRB spectra and that this contribution rises with redshift, explaining why the hydrogen column density inferred from X-rays is substantially in excess of the intrinsic host contribution measured in UV.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: high-redshift - gamma-ray burst: general - intergalactic medium - X-rays: general

CDS comments: GRB140505 is a probable misprint for GRB 140515A.

Simbad objects: 33

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Number of rows : 33
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 070110 gB 00 03 39.270 -52 58 27.00 21.8 21.9 21.2     ~ 220 0
2 GRB 150206A gB 00 40 17.57 -63 10 56.0           ~ 55 0
3 Fermi bn140703026 gB 00 51 58.99 +45 06 05.4           ~ 90 0
4 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 496 0
5 GRB 070721B gB 02 12 32.98 -02 11 39.8           ~ 128 0
6 Fermi bn100728439 gB 02 56 13.44 +00 16 51.6           ~ 142 0
7 GRB 190114C gB 03 38 01.18 -26 56 47.8           ~ 343 0
8 GRB 060210 gB 03 50 57.370 +27 01 34.40   20.27       ~ 275 0
9 GRB 111008A gB 04 01 48.220 -32 42 34.09           ~ 127 0
10 GRB 121024A gB 04 41 53.31 -12 17 26.1           ~ 143 0
11 GRB 151027B gB 05 04 52.67 -06 27 00.7           ~ 61 0
12 GRB 060124 gB 05 08 25.900 +69 44 26.98   18.91 17.35     ~ 280 0
13 GRB 140430A gB 06 51 44.58 +23 01 25.5           ~ 81 0
14 GRB 140419A gB 08 27 57.56 +46 14 25.3           ~ 95 0
15 Fermi bn090516353 gB 09 12 59 -11 50.9           ~ 173 0
16 GRB 050505 gB 09 27 03.300 +30 16 23.70     20.74     ~ 206 0
17 Fermi bn140206304 gB 09 41 16.90 +66 45 42.7           ~ 149 0
18 GRB 180325A gB 10 29 42.57 +24 27 48.7           ~ 85 0
19 GRB 110205A gB 10 58 31.12 +67 31 31.2           ~ 213 0
20 GRB 140515A gB 12 24 15.48 +15 06 17.7           ~ 90 0
21 Fermi bn140423356 gB 13 09 06.20 +49 50 18.3           ~ 114 0
22 GRB 080310 gB 14 40 13.89 -00 10 30.4           ~ 214 0
23 GRB 080721A gB 14 57 55.76 -11 43 24.9           ~ 180 0
24 GRB 081203A gB 15 32 07.6 +63 31 15           ~ 177 0
25 GRB 090715B gB 16 45 21.59 +44 50 20.1           ~ 144 0
26 GRB 120909A gB 18 22 56.81 -59 26 54.9           ~ 103 0
27 Fermi bn080905705 gB 20 06 57.93 -62 33 46.8           ~ 119 0
28 GRB 150403A gB 20 46 01.17 -62 42 40.1           ~ 116 0
29 GRB 180624A gB 21 12 23.40 -02 20 17.0           ~ 36 0
30 GRB 060605 gB 21 28 37.320 -06 03 31.30   20.12 16.53     ~ 210 0
31 GRB 090809 gB 21 54 43.2 -00 05 02           ~ 90 0
32 GRB 060607 gB 21 58 50.400 -22 29 46.70 18.49 16.67 15.09     ~ 318 0
33 GRB 050820A gB 22 29 38.110 +19 33 37.10 18.33 19.00 18.47     ~ 409 0

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