2010A&A...513A..28S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.15CEST08:29:27

2010A&A...513A..28S - Astronomy and Astrophysics, volume 513, A28-28 (2010/4-1)

The local Galactic magnetic field in the direction of Geminga.

SALVATI M.

Abstract (from CDS):

The Milagro hot spot A, close to the Galactic anticenter direction, has been tentatively attributed to cosmic rays from a local reservoir (at a distance ≃100pc), freely streaming along diverging and smooth magnetic field lines. This is at variance with the geometry of the ≃kpc scale Galactic magnetic field, which is known to be aligned with the spiral arms. We investigate the information available on the geometry of the magnetic field on the scales (≃100pc) of relevance here. The magnetic field immediately upstream of the heliosphere has been investigated by previous authors by modeling the interaction of this field with the solar wind. At larger distances, we use the dispersion measure and the rotation measure of nearby pulsars (especially towards the third Galactic quadrant). Additional information about the local field towards the North Polar Spur is taken from previous studies of the diffuse radio emission and the polarization of starlight. The asymmetry of the heliosphere with respect to the incoming interstellar medium implies a magnetic field almost orthogonal to the local spiral arm, in the general direction of hot spot A, but more to the south. This is in good agreement with the nearby pulsar data on the one side, and the North Polar Spur data on the other. The local magnetic field on scales of ≃100 parsecs around the Sun seems to be oriented so as to provide a direct connection between the Solar System and a possible site of the Geminga supernova; the residual angular difference and the shape and orientation of the Milagro hot spot can be attributed to the field trailing in the wake of the heliosphere.

Abstract Copyright:

Journal keyword(s): cosmic rays - supernovae: general - supernovae: individual: Geminga - ISM: magnetic fields

Simbad objects: 16

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Number of rows : 16

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 NAME SGP reg 00 51 26.275 -27 07 41.70           ~ 513 0
2 PSR J0108-1431 Psr 01 08 08.29 -14 31 48.5           ~ 92 0
3 PSR J0437-47 Psr 04 37 15.7976203608 -47 15 08.536908257           DC 754 0
4 NAME Gal Anticenter reg 05 46 +28.9           ~ 720 0
5 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1092 0
6 PSR B0656+14 Psr 06 59 48.183 +14 14 21.54   24.85 24.90     ~ 759 1
7 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1110 2
8 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545           ~ 2057 1
9 PSR B0950+08 Psr 09 53 09.3 +07 55 36           ~ 689 2
10 NAME North Polar Spur ISM 12 00 +00.0           ~ 301 1
11 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1020 0
12 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 427 1
13 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1120 1
14 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
15 PSR J2124-3358 Psr 21 24 43.8464 -33 58 44.961           ~ 248 1
16 PSR J2144-3939 Psr 21 44 12.10 -39 33 55.2           ~ 94 0

    Equat.    Gal    SGal    Ecl

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2020.07.15-08:29:27

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