Table 1
Bulge, disk, and total annihilation radiation luminosities for 56Ni, 44Ti, and 26Al positrons in the three transport configurations tested.
| Source | Transport | Bulge (R ≤ 3 kpc) | Disk (R > 3 kpc) | Total Galaxy | Bulge/Disk ratio | Annihilation fraction |
|
|
||||||
| 56Ni only | A | 0.32 | 0.58 | 0.91 | 0.56 | 1.00 |
| B | 0.16 | 0.47 | 0.63 | 0.35 | 0.68 | |
| C | 0.09 | 0.39 | 0.48 | 0.22 | 0.57 | |
|
|
||||||
| 44Ti only | A | 0.01 | 0.18 | 0.20 | 0.08 | 1.00 |
| B | 0.01 | 0.11 | 0.12 | 0.10 | 0.63 | |
| C | 0.01 | 0.10 | 0.11 | 0.06 | 0.59 | |
|
|
||||||
| 26Al only | A | 0.01 | 0.13 | 0.14 | 0.08 | 1.00 |
| B | 0.01 | 0.10 | 0.11 | 0.09 | 0.77 | |
| C | 0.01 | 0.09 | 0.10 | 0.07 | 0.73 | |
|
|
||||||
| 56Ni+44Ti+26Al | A | 0.35 | 0.90 | 1.25 | 0.39 | 1.00 |
| B | 0.18 | 0.68 | 0.86 | 0.27 | 0.69 | |
| C | 0.10 | 0.59 | 0.69 | 0.17 | 0.56 | |
Notes. Also indicated are the corresponding bulge-to-disk ratios, and the fractions of positrons that annihilate in the Galaxy. The luminosities in Cols. 3 to 5 are given in 1043 ph s-1 for the mean positron injection rates determined in Sect. 4. They correspond to 511 keV emission from parapositronium and direct annihilation, for a positronium fraction fPs = 0.95.
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