2021A&A...655A...7H

Query : 2021A&A...655A...7H

2021A&A...655A...7H - Astronomy and Astrophysics, volume 655A, 7-7 (2021/11-1)

LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV.

HESS COLLABORATION, ABDALLA H., AHARONIAN F., AIT BENKHALI F., ANGUNER E.O., ARCARO C., ARMAND C., ARMSTRONG T., ASHKAR H., BACKES M., BAGHMANYAN V., BARBOSA MARTINS V., BARNACKA A., BARNARD M., BATZOFIN R., BECHERINI Y., BERGE D., BERNLOHR K., BI B., BOTTCHER M., BOISSON C., BOLMONT J., DE BONY DE LAVERGNE M., BREUHAUS M., BROSE R., BRUN F., BULIK T., BYLUND T., CANGEMI F., CAROFF S., CASANOVA S., CATALANO J., CHAMBERY P., CHAND T., CHEN A., COTTER G., CURYLO M., DAMASCENE MBARUBUCYEYE J., DAVIDS I.D., DAVIES J., DEVIN J., DJANNATI-ATAI A., DMYTRIIEV A., DONATH A., DOROSHENKO V., DREYER L., DU PLESSIS L., DUFFY C., EGBERTS K., EINECKE S., ERNENWEIN J.-P., FEGAN S., FEIJEN K., FIASSON A., FICHET DE CLAIRFONTAINE G., FONTAINE G., LOTT F., FUSSLING M., FUNK S., GABICI S., GALLANT Y.A., GIAVITTO G., GIUNTI L., GLAWION D., GLICENSTEIN J.F., GRONDIN M.-H., HATTINGH S., HAUPT M., HERMANN G., HINTON J.A., HOFMANN W., HOISCHEN C., HOLCH T.L., HOLLER M., HORBE M., HORNS D., HUANG Z., HUBER D., JAMROZY M., JANKOWSKY F., JOSHI V., JUNG-RICHARDT I., KASAI E., KATARZYNSKI K., KATZ U., KHANGULYAN D., KHELIFI B., KLEPSER S., KLUZNIAK W., KOMIN N., KONNO R., KOSACK K., KOSTUNIN D., KRETER M., KUKEC MEZEK G., KUNDU A., LAMANNA G., LE STUM S., LEMIERE A., LEMOINE-GOUMARD M., LENAIN J.-P., LEUSCHNER F., LEVY C., LOHSE T., LUASHVILI A., LYPOVA I., MACKEY J., MAJUMDAR J., MALYSHEV D., MALYSHEV D., MARANDON V., MARCHEGIANI P., MARCOWITH A., MARES A., MARTI-DEVESA G., MARX R., MAURIN G., MEINTJES P.J., MEYER M., MITCHELL A., MODERSKI R., MOHRMANN L., MONTANARI A., MOORE C., MOULIN E., MULLER J., MURACH T., NAKASHIMA K., DE NAUROIS M., NAYERHODA A., NDIYAVALA H., NIEMIEC J., PRIYANA NOEL A., O'BRIEN P., OBERHOLZER L., ODAKA H., OHM S., OLIVERA-NIETO L., DE ONA WILHELMI E., OSTROWSKI M., PANNY S., PANTER M., PARSONS R.D., PERON G., PITA S., POIREAU V., PROKHOROV D.A., PROKOPH H., PUHLHOFER G., PUNCH M., QUIRRENBACH A., REICHHERZER P., REIMER A., REIMER O., REMY Q., RENAUD M., REVILLE B., RIEGER F., ROMOLI C., ROWELL G., RUDAK B., RUEDA RICARTE H., RUIZ-VELASCO E., SAHAKIAN V., SAILER S., SALZMANN H., SANCHEZ D.A., SANTANGELO A., SASAKI M., SCHAFER J., SCHUSSLER F., SCHUTTE H.M., SCHWANKE U., SENNIAPPAN M., SEYFFERT A.S., SHAPOPI J.N.S., SHININGAYAMWE K., SIMONI R., SINHA A., SOL H., SPECOVIUS A., SPENCER S., SPIR-JACOB M., STAWARZ L., STEENKAMP R., STEGMANN C., STEINMASSL S., STEPPA C., SUN L., TAKAHASHI T., TANAKA T., TAVERNIER T., TAYLOR A.M., TERRIER R., THIERSEN J.H.E., THORPE-MORGAN C., TLUCZYKONT M., TOMANKOVA L., TSIROU M., TSUJI N., TUFFS R., UCHIYAMA Y., VAN DER WALT D.J., VAN ELDIK C., VAN RENSBURG C., VAN SOELEN B., VASILEIADIS G., VEH J., VENTER C., VINCENT P., VINK J., VOLK H.J., WAGNER S.J., WATSON J., WERNER F., WHITE R., WIERZCHOLSKA A., WONG Y.W., YASSIN H., YUSAFZAI A., ZACHARIAS M., ZANIN R., ZARGARYAN D., ZDZIARSKI A.A., ZECH A., ZHU S.J., ZMIJA A., ZOUARI S. and ZYWUCKA N.

Abstract (from CDS):


Context. Supernova remnants (SNRs) are commonly thought to be the dominant sources of Galactic cosmic rays up to the knee of the cosmic-ray spectrum at a few PeV. Imaging Atmospheric Cherenkov Telescopes have revealed young SNRs as very-high-energy (VHE, >100 GeV) gamma-ray sources, but for only a few SNRs the hadronic cosmic-ray origin of their gamma-ray emission is indisputably established. In all these cases, the gamma-ray spectra exhibit a spectral cutoff at energies much below 100 TeV and thus do not reach the PeVatron regime.
Aims. The aim of this work was to achieve a firm detection for the oxygen-rich SNR LMC N132D in the VHE gamma-ray domain with an extended set of data, and to clarify the spectral characteristics and the localization of the gamma-ray emission from this exceptionally powerful gamma-ray-emitting SNR.
Methods. We analyzed 252 h of High Energy Stereoscopic System (H.E.S.S.) observations towards SNR N132D that were accumulated between December 2004 and March 2016 during a deep survey of the Large Magellanic Cloud, adding 104 h of observations to the previously published data set to ensure a > 5σ detection. To broaden the gamma-ray spectral coverage required for modeling the spectral energy distribution, an analysis of Fermi-LAT Pass 8 data was also included.
Results. We unambiguously detect N132D at VHE with a significance of 5.7σ. We report the results of a detailed analysis of its spectrum and localization based on the extended H.E.S.S. data set. The joint analysis of the extended H.E.S.S and Fermi-LAT data results in a spectral energy distribution in the energy range from 1.7 GeV to 14.8 TeV, which suggests a high luminosity of N132D at GeV and TeV energies. We set a lower limit on a gamma-ray cutoff energy of 8 TeV with a confidence level of 95%. The new gamma-ray spectrum as well as multiwavelength observations of N132D when compared to physical models suggests a hadronic origin of the VHE gamma-ray emission.
Conclusions. SNR N132D is a VHE gamma-ray source that shows a spectrum extending to the VHE domain without a spectral cutoff at a few TeV, unlike the younger oxygen-rich SNR Cassiopeia A. The gamma-ray emission is best explained by a dominant hadronic component formed by diffusive shock acceleration. The gamma-ray properties of N132D may be affected by an interaction with a nearby molecular cloud that partially lies inside the 95% confidence region of the source position.

Abstract Copyright: © ESO 2021

Journal keyword(s): gamma rays: general - cosmic rays - ISM: supernova remnants

Simbad objects: 30

goto Full paper

goto View the references in ADS

Number of rows : 30
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17421 0
2 4FGL J0524.8-6938 BL? 05 24 52.2 -69 38 29           ~ 5 0
3 SNR J052501-693842 SNR 05 25 02.3 -69 38 39           ~ 401 1
4 SNR B0525-66.0 SNR 05 25 27.1 -65 59 11           ~ 102 1
5 SNR B0535-66.0 SNR 05 35 43.1 -66 01 59           ~ 175 1
6 4FGL J0535.2-6736 HXB 05 36 00.01 -67 35 07.5           ~ 41 0
7 NAME 30 Dor C Rad 05 36 07.70 -69 11 52.6           ~ 77 1
8 0FGL J0538.4-6856 BL? 05 37 49.3 -69 09 53           ~ 12 0
9 NGC 2060 SNR 05 37 51.4466169456 -69 10 23.947092084   9.69 9.59     ~ 360 2
10 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1188 2
11 PSR B0540-69 Psr 05 40 11.2000490438 -69 19 54.198559829           ~ 904 3
12 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1235 1
13 NAME Pup A BL? 08 24 07 -42 59.8           ~ 600 1
14 NAME Vela Jr SN BL? 08 52.0 -46 20           ~ 474 2
15 ESO 134-11 HII 14 40 29 -62 38.7           ~ 565 1
16 SNR G318.2+00.1 SNR 14 54.8 -59 04           ~ 31 0
17 AX J1640.7-4632 BL? 16 40 43.2 -46 31 48           ~ 158 2
18 PSR J1640-4631 Psr 16 40 43.52 -46 31 35.4           ~ 57 0
19 1FGL J1711.7-3944c BL? 17 12 27 -39 41.2     12.27     ~ 723 1
20 SNR G348.7+00.3 SNR 17 13 43.0 -38 10 12           ~ 121 2
21 SNR G348.5+00.1 SNR 17 14 31.780 -38 28 34.50           ~ 220 3
22 2CG 359+00 BL? 17 45 11 -30 11.9           ~ 98 0
23 SNR G359.1-00.5 Rad 17 45 30 -29 57.0           ~ 174 1
24 SNR G006.4-00.1 SNR 18 00 31.2011719 -23 25 48.001099           ~ 737 1
25 PSR B1800-21 Psr 18 03 51.45 -21 37 08.1           ~ 260 1
26 1AGLR J1807-2103 gam 18 03 52.1 -21 10 54           ~ 72 0
27 W 30 BL? 18 05 31.2011719 -21 25 48.001099           ~ 174 1
28 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 964 2
29 SNR G106.3+02.7 SNR 22 27.5 +60 50           ~ 76 1
30 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2790 1

To bookmark this query, right click on this link: simbad:objects in 2021A&A...655A...7H and select 'bookmark this link' or equivalent in the popup menu