2013A&A...554A..62G


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST00:58:30

2013A&A...554A..62G - Astronomy and Astrophysics, volume 554A, 62-62 (2013/6-1)

Constraining the Galactic millisecond pulsar population using Fermi Large Area Telescope.

GREGOIRE T. and KNOEDLSEDER J.

Abstract (from CDS):

The Fermi Large Area Telescope (Fermi-LAT) has recently revealed a large population of gamma-ray emitting millisecond pulsars (MSPs) in our Galaxy. We aim to infer the properties of the Galactic population of gamma-ray emitting MSPs from the samples detected by the Fermi-LAT. We developed a Monte Carlo model to predict the spatial and gamma-ray luminosity distribution of the Galactic MSP population. Based on the estimated detection sensitivity of Fermi-LAT, we split the model population into detectable and undetectable samples of MSPs. Using a maximum likelihood method, we compared the detectable sample to a set of 36 MSPs detected by Fermi-LAT, and we derived the parameters of the spatial distribution and the total number of gamma-ray emitting MSPs in the Galaxy. The corresponding undetectable sample provided us with an estimate for the expected diffuse emission from unresolved MSPs in the Milky Way. We also applied our method to an extended sample of 66 MSPs that combines firmly detected MSPs and γ-ray sources that show characteristics reminiscent of MSPs. Using the sample of 36 MSPs detected by Fermi-LAT, our analysis suggests the existence of 9000-11000γ-ray emitting MSPs in the Galaxy. The maximum likelihood analysis suggests an exponential radial scale length of ∼4kpc and an exponential vertical scale height of ∼1kpc for the underlying MSP population. The unresolved population of Galactic γ-ray emitting MSPs is predicted to contribute a flux of ∼2x10–6ph/cm2/s/sr to the Galactic diffuse emission observed from the central radian above 100 MeV. This value corresponds to ∼1% of the total observed γ-ray flux from that region. For latitudes |b|≥40° the expected average intensity amounts to ∼2x10–8ph/cm2/s/sr above 100MeV, which corresponds to 0.2% of the high-latitude background intensity. Using the extended sample increases the estimated number of γ-ray emitting MSPs in the Galaxy to ∼22000 and slightly reduces the scale parameters of the spatial distribution. The results are robust with respect to systematic uncertainties in the estimated Fermi-LAT detection sensitivity. For the first time our analysis provides γ-ray based constraints on the Galactic population of MSPs. The radial scale length and vertical scale height of the population is consistent with estimates based on radio data. Our analysis suggests that MSPs do not provide any significant contribution to the isotropic diffuse γ-ray background emission.

Abstract Copyright:

Journal keyword(s): pulsars: general - gamma rays: diffuse background

Simbad objects: 38

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Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR J0023+0923 Psr 00 23 16.890 +09 23 24.18           ~ 78 0
2 PSR J0030+0451 Psr 00 30 27.4277 +04 51 39.710           ~ 285 1
3 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 162 0
4 PSR J0101-6422 Psr 01 01 11.1163 -64 22 30.171           ~ 41 0
5 PSR J0103+48 Psr 01 03 00.000 +48 00 00.00           ~ 27 0
6 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 305 2
7 PSR J0340+41 Psr 03 40 23.2887 +41 30 45.300           ~ 54 0
8 PSR J0437-47 Psr 04 37 15.99744 -47 15 09.7170           DC 785 0
9 PSR J0610-2100 Psr 06 10 13.5921 -21 00 28.016           ~ 65 0
10 PSR B0613-02.0 Psr 06 13 43.9759 -02 00 47.228           ~ 213 1
11 PSR J0614-3329 Psr 06 14 10.3479 -33 29 54.116           ~ 74 1
12 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 261 1
13 PSR J1024-0719 Psr 10 24 38.697 -07 19 19.07           ~ 193 0
14 PSR J1124-36 Psr 11 24 00.000 -36 00 00.00           ~ 33 0
15 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 93 0
16 PSR J1446-4701 Psr 14 46 35.7143 -47 01 26.762           ~ 44 1
17 PSR J1514-4946 Psr 15 14 19.1142 -49 46 15.528           ~ 34 0
18 PSR J1600-3053 Psr 16 00 51.90403 -30 53 49.3190           ~ 125 0
19 PSR J1614-2230 Psr 16 14 36.5070 -22 30 31.207           ~ 311 1
20 PSR J1658-5324 Psr 16 58 43.000 -53 17 45.00           ~ 26 0
21 PSR J1713+0447 Psr 17 13 49.53053 +07 47 37.5264           ~ 375 1
22 PSR J1744-1134 Psr 17 44 29.4172 -11 34 54.710           ~ 216 1
23 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12154 0
24 PSR J1747-4036 Psr 17 47 29.000 -40 36 00.00           ~ 47 0
25 PSR J1810+17 Psr 18 10 37.2803754941 +17 44 37.471906499           ~ 74 0
26 PSR J1858-2216 Psr 18 58 04.42 -22 19 13.7           ~ 23 0
27 PSR J1902-5105 Psr 19 02 02.8476 -51 05 56.969           ~ 34 0
28 PSR B1937+21 Psr 19 39 39.6 +21 37 22           ~ 982 2
29 PSR J1959+2048 Psr 19 59 36.7480 +20 48 14.599   20.4       ~ 719 2
30 PSR J2017+0603 Psr 20 17 22.7048 +06 03 05.585           ~ 79 1
31 PSR J2043+1711 Psr 20 43 20.8828 +17 11 28.941           ~ 82 1
32 PSR J2047+1053 Psr 20 47 00.000 +10 53 00.00           ~ 27 0
33 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 256 1
34 PSR J2214+3000 Psr 22 14 38.8480 +30 00 38.209           ~ 82 0
35 PSR J2215+51 Psr 22 15 32.6864199137 +51 35 36.406276103           ~ 98 0
36 PSR J2241-5236 Psr 22 41 42.03161 -52 36 36.2492           ~ 79 1
37 PSR J2302+4442 Psr 23 02 46.9789 +44 42 22.102           ~ 79 0
38 NAME Galactic Bulge reg ~ ~           ~ 3574 0

    Equat.    Gal    SGal    Ecl

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2021.05.06-00:58:30

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