Table 1
Bulge, disk, and total 511 keV annihilation fluxes (in ph cm-2 s-1) for 26Al, 44Ti, and 56Ni positrons.
| Source | SN Ia escape | Halo GMF | Bulge flux | Disk flux | Total flux | Bulge/Disk | Galactic escape |
| fraction (%) | configuration | (×10-5) | (×10-4) | (×10-4) | ratio (%) | fraction (%) | |
|
|
|||||||
| 26Al | N/A | N | 2.4 | 5.2 ± 0.4 | 5.5 ± 0.4 | 4.6 ± 0.4 | 0.4 |
| D | 2.7 | 4.8 ± 0.1 | 5.1 ± 0.1 | 5.6 ± 0.2 | 1.0 | ||
| X | 1.9 | 4.8 ± 0.2 | 5.0 ± 0.2 | 3.9 ± 0.1 | 5.0 | ||
|
|
|||||||
| 44Ti | N/A | N | 2.3 | 5.3 ± 0.3 | 5.5 ± 0.3 | 4.3 ± 0.2 | 0.7 |
| D | 2.6 | 4.5 ± 0.1 | 4.7 ± 0.1 | 5.8 ± 0.2 | 1.6 | ||
| X | 1.7 | 5.2 ± 0.5 | 5.4 ± 0.5 | 3.2 ± 0.3 | 7.0 | ||
|
|
|||||||
| 56Ni | 0.5% | N | 1.2 | 2.3 ± 0.2 | 2.4 ± 0.2 | 5.5 ± 0.5 | 0.2 |
| D | 1.3 | 2.2 ± 0.2 | 2.4 ± 0.2 | 5.9 ± 0.5 | 0.6 | ||
| X | 0.9 | 2.1 ± 0.1 | 2.2 ± 0.1 | 4.4 ± 0.2 | 4.3 | ||
|
|
|||||||
| 5% | N | 12.1 | 20.4 ± 0.7 | 21.6 ± 0.7 | 5.9 ± 0.2 | 0.4 | |
| D | 13.4 | 20.7 ± 0.9 | 22.0 ± 0.9 | 6.5 ± 0.3 | 0.9 | ||
| X | 8.6 | 20.8 ± 1.1 | 21.7 ± 1.1 | 4.1 ± 0.2 | 6.0 | ||
|
|
|||||||
| 10% | N | 24.0 | 42.5 ± 1.6 | 44.9 ± 1.6 | 5.6 ± 0.2 | 0.5 | |
| D | 27.0 | 40.8 ± 1.6 | 43.5 ± 1.6 | 6.6 ± 0.3 | 1.0 | ||
| X | 16.8 | 41.9 ± 4.0 | 43.6 ± 4.0 | 4.0 ± 0.4 | 6.5 | ||
|
|
|||||||
| 56Ni+44Ti+26Al | 0.5% | N | 5.9 | 12.8 ± 0.6 | 13.3 ± 0.6 | 4.7 ± 0.2 | 0.5 |
| D | 6.6 | 11.5 ± 0.3 | 12.2 ± 0.3 | 5.8 ± 0.1 | 1.2 | ||
| X | 4.5 | 12.2 ± 0.6 | 12.6 ± 0.6 | 3.7 ± 0.2 | 5.7 | ||
|
|
|||||||
| 5% | N | 16.8 | 30.9 ± 0.9 | 32.6 ± 0.9 | 5.5 ± 0.2 | 0.5 | |
| D | 18.7 | 30.0 ± 0.9 | 31.8 ± 0.9 | 6.3 ± 0.2 | 1.0 | ||
| X | 12.2 | 30.9 ± 1.3 | 32.2 ± 1.3 | 3.9 ± 0.2 | 6.0 | ||
|
|
|||||||
| 10% | N | 28.7 | 53.0 ± 1.7 | 55.9 ± 1.7 | 5.5 ± 0.2 | 0.5 | |
| D | 32.3 | 50.1 ± 1.6 | 53.3 ± 1.6 | 6.5 ± 0.2 | 1.0 | ||
| X | 20.3 | 52.0 ± 4.1 | 54.0 ± 4.1 | 3.9 ± 0.3 | 6.4 | ||
Notes. In the third column, N, D, and X stand for no halo field, dipole, and X-shape, respectively. For 56Ni positrons, the fluxes are indicated for three different escape fractions from the SN Ia ejecta. The escape fractions indicated for the cumulated three radioactive sources only apply to 56Ni positrons. We also indicate the bulge-to-disk flux ratios and the fractions of positrons that escape the Galaxy. The uncertainties were calculated by a bootstrap method. The uncertainties are not shown for the bulge flux and the Galactic escape fraction because the maximum relative uncertainty is only ~0.5% and ~5%, respectively.
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