21cmBounds

Python script for plotting the current upper limits on the power spectrum of the cosmological 21 cm line. Roughly inspired in arXiv:1907.08211.

Observational bounds

The upper limits considered are stored in the data folder. The data files present at least two columns, corresponding to the redshifts z and the power spectrum in units of (mK)^2. If the bound is on a extended range of redshifts, there are two additional columns, with the minimum and maximum redshifts, and thus the first column refers to the mean redshift.

The file list_data.txt includes the bounds to be considered, indicating the name of the data file in the data folder, a label with the name of the experiment and the reference of the upper limit, the color and the marker type.

Scales for most of the upper limits plotted lie within k ~ 0.1 and 0.3 h/Mpc, with few exceptions. The considered experiments, bounds and scales k at which the upper limits correspond are the following:

File	Reference	arXiv	k [h/Mpc]	Notes
GMRT_2013	Paciga et al. 2013	1301.5906	0.5	-
GMRT_2020	Pal et al. 2020	2012.04998	1.59	Other k available
MWA_2014	Dillon et al. 2014	1304.4229	~ 0.1	Other k available
MWA_2015	Dillon et al. 2015	1506.01026	~ 0.2	Other k available
MWA_2016_1	Beardsley et al. 2016	1608.06281	~ 0.2	Table 1, Polarization N-S (see reference)
MWA_2016_2	Ewall-Wice et al. 2016	1605.00016	~ 0.2	Sec. 4.4
MWA_2019_1	Barry et al. 2019	1909.00561	0.2	-
MWA_2019_2	Li et al. 2019	1911.10216	~ 0.2	Table 2. Other k available
MWA_2020	Trott et al. 2020	2002.02575	0.142	Table 4. Other k available
LOFAR_2017	Patil et al. 2017	1702.08679	0.128	Table 3 (stronger limits at k = 0.053 h/Mpc)
LOFAR_2018	Gehlot et al. 2018	1809.06661	0.038	Redshifts between z=19.8−25.2, 3C220 field (see reference)
LOFAR_2020	Mertens et al. 2020	2002.07196	0.100	Table 4. Other k available
OVRO-LWA_2019	Eastwood et al. 2019	1906.08943	~ 0.1	-
OVRO-LWA_2021	Garsden et al. 2021	2102.09596	0.3	Redshifts between z=25−31
PAPER_2019	Kolopanis et al. 2019	1909.02085	~ 0.3	-
AARTFAAC_2020	Gehlot et al. 2020	2010.02269	0.144	Redshifts between z=17.9, 18.6, average of two bins (see reference)

Fiducial model

For comparison purposes, a fiducial theoretical model is also included, computed with 21cmFAST (see arXiv:1003.3878, arXiv:1809.08995). By default, the line shown is at k = 0.2 h/Mpc (but this can be modified).

HERA and SKA sensitivity

Sensitivity for the HERA and SKA experiments is also shown, being computed for the default configurations with 21cmSense (see arXiv:1210.2413, arXiv:1310.7031).

Citation

If you use the code, please link this repository and cite the DOI 10.5281/zenodo.4579904.

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