2010A&A...524A..51D


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.06CET16:22:50

2010A&A...524A..51D - Astronomy and Astrophysics, volume 524, A51-51 (2010/12-1)

Galactic electrons and positrons at the Earth: new estimate of the primary and secondary fluxes.

DELAHAYE T., LAVALLE J., LINEROS R., DONATO F. and FORNENGO N.

Abstract (from CDS):

The so-called excess of cosmic ray (CR) positrons observed by the PAMELA satellite up to 100 GeV has led to many interpretation attempts, from standard astrophysics to a possible exotic contribution from dark matter annihilation or decay. The Fermi data subsequently obtained about CR electrons and positrons in the range 0.02-1TeV, and HESS data above 1TeV have provided additional information about the leptonic content of local Galactic CRs. We analyse predictions of the CR lepton fluxes at the Earth of both secondary and primary origins, evaluate the theoretical uncertainties, and determine their level of consistency with respect to the available data. For propagation, we use a relativistic treatment of the energy losses for which we provide useful parameterizations. We compute the secondary components by improving on the method that we derived earlier for positrons. For primaries, we estimate the contributions from astrophysical sources (supernova remnants and pulsars) by considering all known local objects within 2 kpc and a smooth distribution beyond. We find that the electron flux in the energy range 5-30GeV is well reproduced by a smooth distant distribution of sources with index γ ∼2.3-2.4, while local sources dominate the flux at higher energy. For positrons, local pulsars have an important effect above 5-10GeV. Uncertainties affecting the source modeling and propagation are degenerate and each translates into about one order of magnitude error in terms of local flux. The spectral shape at high energy is weakly correlated with the spectral indices of local sources, but more strongly with the hierarchy in their distance, age and power. Despite the large theoretical errors that we describe, our global and self-consistent analysis can explain all available data without over-tuning the parameters, and therefore without the need to consider any exotic physics. Though a standard paradigm of Galactic CRs is well established, our results show that we can hardly talk about any standard model of CR leptons, because of the very large theoretical uncertainties. Our analysis provides details about the impact of these uncertainties, thereby sketching a roadmap for future improvements.

Abstract Copyright:

Journal keyword(s): cosmic rays

Simbad objects: 67

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Number of rows : 67

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SNR G119.5+10.2 SNR 00 06.6 +72 47           ~ 228 1
2 SNR G127.1+00.5 SNR 01 28 20.000 +63 10 00.00           ~ 84 0
3 NGC 559 OpC 01 29 31 +63 18.1   9.85 9.5     ~ 53 0
4 PSR B0154+61 Psr 01 57 49.930 +62 12 25.90           ~ 104 0
5 PSR B0355+54 Psr 03 58 53.7165 +54 13 13.727           ~ 379 1
6 PSR B0450+55 Psr 04 54 07.709 +55 43 41.51           ~ 143 0
7 SNR G156.2+05.7 SNR 04 58 51.300 +51 50 28.00           ~ 107 1
8 SNR G160.8+02.6 SNR 05 01 00.000 +46 40 00.00           ~ 184 0
9 PSR B0458+46 Psr 05 02 04.561 +46 54 06.09           ~ 74 0
10 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           F 4721 1
11 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5491 4
12 PSR J0538+2813 Psr 05 38 25.06 +28 17 11.0           ~ 161 2
13 SNR G180.0-01.7 SNR 05 39 00.000 +27 50 00.00           ~ 197 2
14 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1073 1
15 NAME Rosette Nebula HII 06 31 40 +04 57.8           ~ 430 1
16 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1070 0
17 NAME Monoceros SNR SNR 06 38 43 +06 30.2           ~ 207 0
18 NAME MONOGEM SNR SNR 06 58 50 +13 55.9           ~ 86 0
19 PSR B0656+14 Psr 06 59 48.183 +14 14 21.54   24.85 24.90     ~ 739 1
20 PSR B0740-28 Psr 07 42 49.058 -28 22 43.76           ~ 348 0
21 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1090 2
22 PSR J0835-3707 Psr 08 35 03.08 -37 07 51.5           ~ 10 0
23 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545           ~ 2018 1
24 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 389 2
25 PSR J0855-4644 Psr 08 55 36.18 -46 44 13.4           ~ 34 1
26 PSR B0905-51 Psr 09 07 15.900 -51 57 59.25           ~ 62 0
27 PSR B0950+08 Psr 09 53 09.3 +07 55 36           ~ 679 2
28 NAME Antlia SNR SNR 10 44 -37.2           ~ 12 1
29 PSR B1055-52 Psr 10 57 58.970 -52 26 56.52           ~ 670 0
30 PSR J1301-6310 Psr 13 01 28.30 -63 10 40.5           ~ 9 1
31 SNR G315.1+02.7 SNR 14 33 25.000 -57 35 30.00           ~ 22 1
32 NAME Lupus Loop SNR 15 10.0 -40 00           ~ 59 0
33 PSR B1507-44 Psr 15 10 48.9 -44 22 07           ~ 23 0
34 PSR J1530-5327 Psr 15 30 26.87 -53 27 56.3           ~ 18 0
35 PSR J1549-4848 Psr 15 49 21.154 -48 48 37.44           ~ 33 0
36 PSR B1702-19 Psr 17 05 36.099 -19 06 38.60           ~ 139 0
37 PSR B1706-16 Psr 17 09 26.4413 -16 40 57.730           ~ 197 0
38 SNR G347.3-00.5 SNR 17 12 27 -39 41.2           ~ 583 1
39 SN 393 SN* 17 14 -39.8           ~ 34 1
40 PSR J1740+1000 Psr 17 40 25.91 +10 00 06.0           ~ 49 0
41 PSR J1741-2054 Psr 17 41 57.282 -20 54 04.11           ~ 88 1
42 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11077 0
43 PSR B1749-28 Psr 17 52 58.6896 -28 06 37.300           ~ 234 0
44 PSR B1822-09 Psr 18 25 30.554 -09 35 22.10           ~ 300 0
45 SNR G019.0-01.1 SNR 18 29.3 -12 54           ~ 20 1
46 PSR J1908+0734 Psr 19 08 17.010 +07 34 14.36           ~ 30 0
47 PSR J1915+1541 Psr 19 18 07.70 +15 41 15.2           ~ 18 0
48 PSR B1929+10 Psr 19 32 13.79 +10 59 33.2           ~ 683 0
49 SNR G065.2+05.7 SNR 19 33.0 +31 10           ~ 84 0
50 SNR G065.7+01.2 SNR 19 52 13.70 +29 25 08.0           ~ 79 0
51 SNR G068.8+02.6 SNR 19 52 55 +32 54.2           ~ 327 1
52 PSR B1951+32 Psr 19 52 58.181 +32 52 40.98           ~ 548 2
53 SNR G082.2+05.3 SNR 20 19.0 +45 30           ~ 84 0
54 NAME gam Cyg SNR SNR 20 20 17.100 +40 26 09.00           ~ 196 2
55 * gam Cyg V* 20 22 13.7018357 +40 15 24.044963 3.44 2.90 2.23 1.74 1.40 F8Ib 543 0
56 PSR J2043+2740 Psr 20 43 43.5 +27 40 56           ~ 89 0
57 SNR G089.0+04.7 SNR 20 45.0 +50 35           ~ 191 0
58 NAME Cyg Loop SNR 20 51.0 +30 40           ~ 808 0
59 CTB 104a Rad 21 27.9 +50 46           ~ 22 0
60 SNR G093.7-00.2 SNR 21 29.3 +50 50           ~ 60 1
61 SH 2-147 HII 22 55.7 +58 28           ~ 40 1
62 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2339 1
63 PSR B2334+61 Psr 23 37 05.779 +61 51 01.69           ~ 165 1
64 SNR G114.3+00.3 SNR 23 37 05.780 +61 51 01.69           ~ 105 1
65 SNR G116.5+01.1 SNR 23 53 42.000 +63 15 00.00           ~ 58 0
66 CTB 1 SNR 23 59 13 +62 26.2           ~ 134 0
67 SNR G203.0+12.0 SNR ~ ~           ~ 6 1

    Equat.    Gal    SGal    Ecl

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2019.12.06-16:22:50

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