2016A&A...587A..71C


Query : 2016A&A...587A..71C

2016A&A...587A..71C - Astronomy and Astrophysics, volume 587A, 71-71 (2016/3-1)

Unveiling the origin of HESS J1809-193.

CASTELLETTI G., GIACANI E. and PETRIELLA A.

Abstract (from CDS):

The main goal of this paper is to provide new insights on the origin of the observable flux of γ rays from HESS J1809-193 using new high-quality observations in the radio domain. We used the Expanded Very Large Array (now known as the Karl G. Jansky Very large Array, JVLA) to produce a deep full-synthesis imaging at 1.4GHz of the vicinity of PSR J1809-1917. These data were used in conjunction with 12CO observations from the James Clerk Maxwell Telescope in the transition line J=3-2 and atomic hydrogen data from the Southern Galactic Plane Survey to investigate the properties of the interstellar medium in the direction of the source HESS J1809-193. The new radio continuum image, obtained with a synthesized beam of 8''x4'' and a sensitivity of 0.17mJy/beam, reveals with unprecedented detail all the intensity structures in the field. No radio counterpart to the observed X-ray emission supposed to be a pulsar wind nebula powered by PSR J1809-1917 is seen in the new JVLA image. We discovered a system of molecular clouds on the edge of the supernova remnant (SNR) G11.0-0.0 shock front, which is positionally coincident with the brightest part of the TeV source HESS J1809-193. We determine, on the basis of kinematic and morphological evidences, a physical link of the SNR with the clouds for which we estimated a total (molecular plus atomic) mass of ∼3x103M and a total proton density in the range 2-3x103cm–3. We propose as the most likely origin of the very high-energy γ-ray radiation from HESS J1809-193 a hadronic mechanism through collisions of ions accelerated at the SNR G11.0-0.0 shock with the molecular matter in the vicinity of the remnant.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: clouds - radio continuum: ISM

VizieR on-line data: <Available at CDS (J/A+A/587/A71): list.dat G11.0-0.0.fit>

Nomenclature: Table 2: [CGP2016] Cloud N=1, [CGP2016] Cloud A N=3 (A, B and C).

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Vela X Psr 08 33 08.880 -45 11 24.36           ~ 264 1
2 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2219 1
3 PSR B0906-49 Psr 09 08 35.4290 -49 13 05.060           ~ 136 0
4 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4115 2
5 3EG J1639-4702 gam 16 40 30.0 -46 33 00           ~ 143 2
6 PSR J1640-4631 Psr 16 40 43.52 -46 31 35.4           ~ 47 0
7 PSR B1706-44 Psr 17 09 42.7460 -44 29 07.200     13.30     ~ 613 1
8 SNR G348.7+00.3 SNR 17 13 43.0 -38 10 12           ~ 117 2
9 HESS J1713-381 gam 17 13 51.20353 -38 13 13.5700           ~ 29 1
10 SNR G353.6-00.7 SNR 17 31 55.0 -34 42 36           ~ 119 0
11 [KC97c] G010.9+00.1 HII 18 09 15.2 -19 28 58           ~ 3 0
12 MMB G010.958+00.022 Mas 18 09 39.32 -19 26 28.0           ~ 18 0
13 MMB G011.034+00.062 cor 18 09 39.84 -19 21 20.3           ~ 24 0
14 Caswell OH 011.034+00.062 Mas 18 09 39.86 -19 21 21.2           ~ 9 0
15 [CGP2016] Cloud MoC 18 09 41.5 -19 24 33           ~ 1 0
16 [CGP2016] Cloud B MoC 18 09 41.8 -19 21 38           ~ 1 0
17 PSR B1806-19.3 Psr 18 09 43.147 -19 17 38.10           ~ 83 1
18 [CGP2016] Cloud A MoC 18 09 46.3 -19 26 53           ~ 1 0
19 SNR G011.1+00.1 SNR 18 09.8 -19 12           ~ 21 0
20 [CGP2016] Cloud C MoC 18 09 51.3 -19 17 45           ~ 1 0
21 SNR G011.0+00.0 SNR 18 10.1 -19 25           ~ 28 1
22 HESS J1809-193 gam 18 10 31 -19 18.0           ~ 47 1
23 SNR G011.4-00.1 SNR 18 10.8 -19 05           ~ 52 0
24 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 388 1
25 PMN J1834-1237 Rad 18 34 19.30 -12 37 41.0           ~ 10 1

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2022.09.24-18:58:56

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