2025ApJ...990....9L

Query : 2025ApJ...990....9L

2025ApJ...990....9L - Astrophys. J., 990, 9 (2025/September-1)

Discovery of Diffuse γ-Ray Emission in the Vicinity of G213.0-0.6: Supernova Remnant versus the Massive Star-forming Region.

LI Y., GIACINTI G. and LIU S.

Abstract (from CDS):

We report the discovery of high-energy γ-ray emission in the vicinity of G213.0-0.6, which is debated as a supernova remnant (SNR) or an ionized hydrogen (HII) region. Using 16 yr Pass 8 data from Fermi Large Area Telescope, we found three extended sources with different photon spectra in this region, which we label as SrcA, SrcB, and SrcC. Among them, the γ-ray source SrcA with a log-parabola spectrum is spatially coincident with a star-forming region and several OB stars. The power-law spectra source SrcB is spatially coincident with an SNR radio shell. SrcC, with a harder power-law photon spectrum, is located outside of the radio shell structure. All of them are spatially coincident with a dense molecular cloud (MC) in the velocity range of 35-54 km s–1. In this scenario, SrcB can be interpreted as the GeV counterpart of the SNR, and its γ-ray emission originates from the shock-cloud interaction. SrcA and SrcC originate from the escaped CRs illuminating a nearby MC. For SrcA, another possibility is that the γ-ray emission originates from a young stellar cluster associated with a star-forming region; however, the supporting evidence remains insufficient to draw a definitive conclusion.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Supernova remnants - Interstellar medium - Gamma-rays

Simbad objects: 26

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Number of rows : 26
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 SNR G150.3+04.5 SNR 04 26.5 +54 38           ~ 49 0
2 NAME 30 Dor C Rad 05 36 07.70 -69 11 52.6           ~ 87 1
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
4 [FSR2007] 1069 OpC 06 45 06.0 +00 13 43           ~ 2 0
5 Cl Dolidze 25 OpC 06 45 06 +00 18.0   8.19 7.6     ~ 79 1
6 [PCC93] 111 Mas 06 45 10.2 +00 21 49           ~ 3 0
7 [HKS2019] E82 bub 06 45 22.0 +00 14 04           ~ 2 0
8 LBN 211.65-01.51 HII 06 45 28 +00 17.8           ~ 75 0
9 [HKS2019] E81 bub 06 45 54.9 +00 20 55           ~ 2 0
10 [HKS2019] E84 bub 06 46 21.7 -00 02 57           ~ 2 0
11 [KPS2012] MWSC 0984 OpC 06 47 02 -00 00.6           ~ 6 0
12 [HKS2019] E83 bub 06 47 10.8 +00 26 36           ~ 2 0
13 [SUH2012] G212.064-00.739 SFR 06 47 13.0 +00 26 06           ~ 2 0
14 1FGL J0647.3+0031 gam 06 47 22.0 +00 31 44           ~ 16 1
15 SNR G213.0-00.6 SNR 06 51 -00.5           ~ 18 2
16 [HKS2019] E85 bub 06 54 24.0 -04 31 26           ~ 2 0
17 4FGL J0655.3-0037 gam 06 55 18.8 -00 37 52           ~ 2 0
18 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
19 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
20 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
21 SNR G006.4-00.1 SNR 18 00 31.2011719 -23 25 48.001099           ~ 782 1
22 W 30 SNR 18 05 31.2011719 -21 25 48.001099           ~ 188 1
23 LBN 028.77+03.43 HII 18 31 26.5 -02 04 22           ~ 255 2
24 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
25 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
26 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0

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