Table 1.
Brightness temperature and radio excess parameter at z = 18 for different PBH masses and fractions.
| MPBH (M⊙) | fPBH | Tb (K) | Ar | ||
|---|---|---|---|---|---|
| Simple | Makino+1998 | Simple | Makino+1998 | ||
| 1 | 0.0001 | 1.50 × 10−3 | 1.43 × 10−3 | 2.59 × 10−5 | 2.48 × 10−5 |
| 0.007 | 2.80 × 10−1 | 4.64 × 10−2 | 4.84 × 10−3 | 8.02 × 10−4 | |
| 0.01 | 1.60 × 10−1 | 1.53 × 10−1 | 2.77 × 10−3 | 2.65 × 10−3 | |
| 1.0 | 5.44 × 101 | 5.15 × 101 | 9.40 × 10−1 | 8.90 × 10−1 | |
| 10 | 0.0001 | 1.06 × 10−2 | 1.01 × 10−2 | 1.84 × 10−4 | 1.74 × 10−4 |
| 0.0006 | 2.62 × 10−1 | 4.18 × 10−2 | 4.53 × 10−3 | 7.23 × 10−4 | |
| 0.01 | 2.50 × 100 | 2.60 × 100 | 4.32 × 10−2 | 4.49 × 10−2 | |
| 1.0 | 6.14 × 102 | 6.19 × 102 | 1.06 × 101 | 1.07 × 101 | |
| 33 | 0.0001 | 2.42 × 10−2 | 2.32 × 10−2 | 4.19 × 10−4 | 4.01 × 10−4 |
| 0.0006 | 6.52 × 10−1 | 1.30 × 10−1 | 1.13 × 10−2 | 2.25 × 10−3 | |
| 0.01 | 1.22 × 101 | 1.29 × 101 | 2.12 × 10−1 | 2.23 × 10−1 | |
| 1.0 | 1.72 × 103 | 1.76 × 103 | 2.97 × 101 | 3.05 × 101 | |
| 100 | 0.0001 | 4.51 × 10−2 | 4.39 × 10−2 | 7.80 × 10−4 | 7.59 × 10−4 |
| 0.0007 | 1.67 × 100 | 4.14 × 10−1 | 2.88 × 10−2 | 7.16 × 10−3 | |
| 0.01 | 3.83 × 101 | 4.07 × 101 | 6.63 × 10−1 | 7.03 × 10−1 | |
| 1.0 | 4.05 × 103 | 4.23 × 103 | 7.01 × 101 | 7.30 × 101 | |
Notes. The values shown correspond to the same PBH masses and fractions used in Fig. 5, computed using the simple isothermal and Makino+1998 halo density profiles. Only for PBH masses greater than 1 M⊙ with a fraction fPBH = 1, the radio excess parameter Ar satisfies the EDGES constraint (1.9 < Ar < 418; Fialkov & Barkana 2019), which is consistent with the observed 21-cm absorption signal and a required excess radio background relative to the cmB.
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