The EDGES measurement disfavors an excess radio background during the cosmic dawn

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Table 1.

Parameters varied in our inferences and their allowed range.

Component	Parameters	Eq.	Units	Flat prior	Allowed range
${\bar{T}}_{21}$ $\bar{T}_{21}$	f_R,III	24	–	log	[−2, 6]
	L_X,III < 2 kev	19	$erg s^{- 1} M_{⊙}^{- 1} yr$ ${\rm erg\,s^{-1}\,M^{-1}_{\odot}\,yr}$	log	[33, 45]
	f_esc,7	23	–	log	[−6, −1]
	f_⋆,7	9	–	log	[−5, 0]
	A_LW	15	–	linear	[0, 10]

T_FG	p₀	33	K	linear	[1000, 3000]
	p₁	33	K	linear	[−2000, 2000]
	p₂	33	K	linear	[−10³, 10³]
	p₃	33	K	linear	[−10³, 10³]
	p₄	33	K	linear	[−10³, 10³]
	p₅	33	K	linear	[−10⁴, 10⁴]
	p₆	33	K	linear	[−10⁴, 10⁴]
	p₇	33	K	linear	[−10⁵, 10⁵]
	p₈	33	K	linear	[−10⁶, 10⁶]
	p₉	33	K	linear	[−10⁶, 10⁶]

T_cal	a₀	34	K	log	[−10, 2]
	a₁	34	K	log	[−10, 2]
	P	34	MHz	linear	[10, 15]

σ_T	σ_T	36	K	log	[−4, −1]

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