2020ApJ...897..131S

Query : 2020ApJ...897..131S

2020ApJ...897..131S - Astrophys. J., 897, 131-131 (2020/July-2)

Morphological and spectral study of 4FGL J1115.1-6118 in the region of the young massive stellar cluster NGC 3603.

SAHA L., DOMINGUEZ A., TIBALDO L., MARCHESI S., AJELLO M., LEMOINE-GOUMARD M. and LOPEZ M.

Abstract (from CDS):

We report a detailed study of an unidentified gamma-ray source located in the region of the compact stellar cluster NGC 3603. This is a star-forming region (SFR) powered by a massive cluster of OB stars. A dedicated analysis of about 10 yr of data from 10 GeV to 1 TeV, provided by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope, yields the detection of a pointlike source at a significance of 9σ. The source photon spectrum can be described by a power-law model with a best-fit spectral index of 2.35 ± 0.03. In addition, the analysis of a deep Chandra image in the 0.5-7 keV band reliably rules out an extragalactic origin for the gamma-rays. We also conclude that the broadband spectral energy distribution of the point source can be explained well with both leptonic and hadronic models. No firm evidence of association with any other classes of known gamma-ray emitters is found; therefore, we speculate that 4FGL J1115.1-6118 is a gamma-ray-emitting SFR.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Gamma-ray astronomy - Star-forming regions - Galactic cosmic rays - Star clusters - Gamma-rays - Gamma-ray sources - High energy astrophysics - Non-thermal radiation sources - X-ray sources - Young massive clusters - Space telescopes

Nomenclature: Tables A1-A2: [SDT2020] NN (Nos 1-38).

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 42

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Number of rows : 42
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 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
2 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
3 FGES J1109.4-6115 gam 11 09 26.9 -61 15 32           ~ 9 0
4 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
5 [SB2004] 20701 * 11 15 03.08 -61 15 55.9     19.978     ~ 2 0
6 NGC 3603 54 EB* 11 15 03.9748551480 -61 15 35.749501344   15.37 14.34     O6V 12 0
7 [NS2003] 7 IR 11 15 04.03 -61 15 46.6           ~ 3 0
8 [SB2004] 10018 * 11 15 05.16 -61 15 29.7     19.930     ~ 2 0
9 [NS2003] 8 IR 11 15 05.90 -61 15 46.6           ~ 3 0
10 1FGL J1115.2-6124c gam 11 15 06.2 -61 18 31           ~ 15 0
11 Cl* NGC 3603 MMM 103 * 11 15 06.2329590112 -61 15 36.599908263   14.08 13.09     O5V 6 0
12 [HEM2008] 76 * 11 15 06.42 -61 15 36.4           ~ 2 0
13 [HEM2008] 136 * 11 15 06.61 -61 15 40.7           ~ 2 0
14 Cl* NGC 3603 MTT 31 * 11 15 06.6882419424 -61 16 33.434793624   15.20 13.96     O2V 8 0
15 Cl* NGC 3603 MDS 34 * 11 15 06.71 -61 15 32.4           ~ 3 0
16 NGC 3603 63 * 11 15 06.847 -61 15 44.69   14.36 13.28     O3.5 9 0
17 [HEM2008] 51 * 11 15 06.85 -61 15 35.9           ~ 2 0
18 [HEM2008] 249 * 11 15 07.09 -61 15 29.2           ~ 2 0
19 Cl* NGC 3603 MDS E * 11 15 07.28 -61 15 34.9   13.9 13.081     O5V 19 0
20 [HEM2008] 171 * 11 15 07.33 -61 15 48.5           ~ 2 0
21 [NS2003] 6H IR 11 15 07.39 -61 15 20.4           ~ 2 0
22 NGC 3603 56 * 11 15 07.4938023792 -61 15 46.365176664   14.49 13.39     O5.5V(n) 18 0
23 WR 43-2 WR* 11 15 07.5831241008 -61 16 54.766684416   16.140 14.762   12.39 O2If*/WN6 19 0
24 [HEM2008] 103 * 11 15 07.76 -61 15 35.3           ~ 2 0
25 NGC 3603 64 * 11 15 07.8173656536 -61 15 27.941340744   14.62 13.51     O4V 13 0
26 [HEM2008] 148 * 11 15 07.99 -61 15 34.7           ~ 2 0
27 [HEM2008] 179 * 11 15 08.04 -61 15 34.1           ~ 2 0
28 NGC 3603 57 * 11 15 08.1929776680 -61 15 47.342435580   14.25 13.16     O5III(f) 16 0
29 [HEM2008] 105 * 11 15 08.60 -61 15 37.2           ~ 2 0
30 NGC 3603 18 s*b 11 15 08.7088006464 -61 15 59.957261208 13.57 13.67 12.51     O3.5If* 24 0
31 NGC 3603 49 EB* 11 15 09.1241259235 -61 15 33.196313384   15.65 14.49 14.839   O7.5V 10 0
32 NGC 3603 47 * 11 15 09.3526936584 -61 16 02.077865112 13.49 13.71 12.67     O4IV(f) 23 0
33 NGC 3603 22 * 11 15 10.0672574190 -61 15 38.026445713 13.93 14.12 13.06     O5V 16 0
34 NGC 3603 19 * 11 15 11.3180489328 -61 15 55.641789720   14.51 13.56     O5V(n) 15 0
35 Cl* NGC 3603 MTT 122 * 11 15 11.3377299418 -61 16 45.001815771           ~ 21 0
36 [TBP2001] J111511.8-611641 IR 11 15 11.8 -61 16 41           ~ 2 0
37 [SB2004] 57862 * 11 15 26.1321974640 -61 18 06.254817732   18.099 17.068     ~ 2 0
38 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 439 1
39 SNR G292.2-00.5 SNR 11 19.3 -61 28           ~ 98 1
40 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
41 GAL 025.0+00.0 SFR 18 37 -07.1           ~ 7 0
42 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1

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