2020A&A...640A..60Y

Query : 2020A&A...640A..60Y

2020A&A...640A..60Y - Astronomy and Astrophysics, volume 640A60-60 (2020/8-1)

The diffuse gamma-ray emission toward the Galactic mini starburst W43.

YANG R.-Z. and WANG Y.

Abstract (from CDS):

In this paper we report the Fermi Large Area Telescope (Fermi-LAT) detection of the γ-ray emission toward the young star forming region W43. Using the latest source catalog and diffuse background models, the extended γ-ray excess is detected with a significance of ∼16σ. The γ-ray emission has a spectrum with a photon index of 2.3±0.1. We also performed a detailed analysis of the gas content in this region by taking into account the opacity correction to the HI gas column density. The total cosmic-ray (CR) proton energy is estimated to be on the order of 1048 erg, assuming the γ-rays are produced from the interaction of the accelerated protons and nuclei with the ambient gas. Comparing this region to the other star formation regions in our Galaxy, we find that the CR luminosity is better correlated with the wind power than the star formation rate (SFR). This result suggests that CRs are primarily accelerated by stellar wind in these systems.

Abstract Copyright: © ESO 2020

Journal keyword(s): gamma rays: ISM - cosmic rays - open clusters and associations: general

Nomenclature: Figure 1: [YW2020] SN (N=2).

CDS comments: Fig.1 G028-01.5 not identified.

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1064 3
2 NAME Heart Nebula HII 02 32.7 +61 27           ~ 336 1
3 IC 1848 OpC 02 51 19.4 +60 25 32   6.87 6.5     ~ 522 2
4 NAME 30 Dor C Rad 05 36 07.70 -69 11 52.6           ~ 87 1
5 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
6 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
7 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
8 NVSS J184240-035858 Rad 18 42 40.88 -03 58 58.5           ~ 1 0
9 NVSS J184431-030716 Rad 18 44 31.89 -03 07 16.2           ~ 1 0
10 PSR J1844-0346 Psr 18 44 32.90 -03 46 26.6           ~ 45 0
11 HESS J1844-030 gam 18 44 40.0 -03 06 00           ~ 17 0
12 AX J1844.8-0258 HXB 18 44 53 -02 56.0           ~ 126 0
13 SNR G029.7-00.3 SNR 18 46 22.8 -02 59 47           ~ 375 2
14 PSR J1846-0258 Psr 18 46 24.75 -02 58 29.6           ~ 388 2
15 4FGL J1847.2-0141 gam 18 47 14.7 -01 41 33           ~ 7 0
16 4FGL J1847.2-0200 gam 18 47 17.8 -02 00 59           ~ 1 0
17 W 43 SFR 18 47 32 -01 56.5           ~ 604 0
18 PSR J1847-0130 Psr 18 47 35.2 -01 30 46           ~ 44 0
19 HESS J1848-018 gam 18 47 48.72 -01 45 12.5           ~ 32 0
20 0FGL J1848.6-0138 gam 18 48 18.89 -01 40 49.1           ~ 35 1
21 PSR B1845-01 Psr 18 48 23.59600 -01 23 58.4800           ~ 154 0
22 4FGL J1848.6-0202 gam 18 48 39.8 -02 02 57           ~ 3 0
23 NVSS J184840-020408 Rad 18 48 40.84 -02 04 08.5           ~ 1 0
24 PSR J1848-0055 Psr 18 48 45.5 -00 55 53           ~ 4 0
25 SNR G031.9+00.0 SNR 18 49 16.3 -00 55 01           ~ 368 2
26 1FGL J1849.7-0121c gam 18 49 59.82 -01 27 29.3           ~ 16 0
27 SNR G032.5+00.1 SNR 18 50 05.000 -00 25 00.00           ~ 56 1
28 4FGL J1850.2-0201 gam 18 50 17.6 -02 01 33           ~ 6 0
29 SNR G031.5-00.6 Rad 18 51.2 -01 31           ~ 35 1
30 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
31 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0

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