2024A&A...686A.149H

Query : 2024A&A...686A.149H

2024A&A...686A.149H - Astronomy and Astrophysics, volume 686A149 (2024/6-1)

Unveiling extended gamma-ray emission around HESS J1813-178.

HESS COLLABORATION, AHARONIAN F., AIT BENKHALI F., ASCHERSLEBEN J., ASHKAR H., BACKES M., BAKTASH A., BARBOSA MARTINS V., BARNARD J., BATZOFIN R., BECHERINI Y., BERGE D., BERNLOHR K., BI B., BOTTCHER M., BOISSON C., BOLMONT J., DE BONY DE LAVERGNE M., BOROWSKA J., BOUYAHIAOUI M., BREUHAUS M., BROSE R., BRUN F., BRUNO B., BULIK T., BURGER-SCHEIDLIN C., CAROFF S., CASANOVA S., CECIL R., CELIC J., CERRUTI M., CHAMBERY P., CHAND T., CHEN A., CHIBUEZE J., CHIBUEZE O., COTTER G., DAMASCENE MBARUBUCYEYE J., DJANNATI-ATAI A., DMYTRIIEV A., DOROSHENKO V., EINECKE S., ERNENWEIN J.-P., FEIJEN K., FILIPOVIC M., FONTAINE G., FUSSLING M., FUNK S., GABICI S., GALLANT Y.A., GHAFOURIZADEH S., GIAVITTO G., GLAWION D., GLICENSTEIN J.F., GOSWAMI P., GROLLERON G., GRONDIN M.-H., HINTON J.A., HOFMANN W., HOLCH T.L., HOLLER M., JAMROZY M., JANKOWSKY F., JOSHI V., JUNG-RICHARDT I., KATARZYNSKI K., KHATOON R., KHELIFI B., KLEPSER S., KLUZNIAK W., KOMIN N., KOSACK K., KOSTUNIN D., KUNDU A., LANG R.G., LE STUM S., LEITL F., LEMIERE A., LEMOINE-GOUMARD M., LENAIN J.-P., LEUSCHNER F., MACKEY J., MALYSHEV D., MALYSHEV D., MARANDON V., MARINOS P., MARTI-DEVESA G., MARX R., MEHTA A., MITCHELL A., MODERSKI R., MOHRMANN L., MONTANARI A., MOULIN E., MURACH T., DE NAUROIS M., NIEMIEC J., PRIYANA NOEL A., O'BRIEN P., OHM S., OLIVERA-NIETO L., DE ONA WILHELMI E., OSTROWSKI M., PANNY S., PANTER M., PARSONS R.D., PROKHOROV D.A., PUHLHOFER G., PUNCH M., QUIRRENBACH A., REGEARD M., REICHHERZER P., REIMER A., REIMER O., REN H., RENAUD M., REVILLE B., RIEGER F., ROELLINGHOFF G., RUDAK B., SAHAKIAN V., SALZMANN H., SASAKI M., SCHUSSLER F., SCHUTTE H.M., SHAPOPI J.N.S., SPECOVIUS A., SPENCER S., STEENKAMP R., STEINMASSL S., STEPPA C., SUSHCH I., SUZUKI H., TAKAHASHI T., TANAKA T., TERRIER R., TLUCZYKONT M., TSUJI N., UNBEHAUN T., VAN ELDIK C., VECCHI M., VEH J., VENTER C., VINK J., WACH T., WAGNER S.J., WIERZCHOLSKA A., ZACHARIAS M., ZARGARYAN D., ZDZIARSKI A.A., ZOUARI S. and ZYWUCKA N.

Abstract (from CDS):

Context. HESS J1813-178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813-1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813-178 region, taking advantage of improved analysis methods and an extended dataset.
Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin.
Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region.
Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV.
Conclusions. This study suggests that HESS J1813-178 is associated with a γ-ray PWN powered by PSR J1813-1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.

Abstract Copyright: © The Authors 2024

Journal keyword(s): pulsars: individual: PSR J1813-1749 - gamma rays: general - gamma rays: ISM

Simbad objects: 14

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Number of rows : 14
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 PSR J0633+1746 Psr 06 33 54.153 +17 46 12.91           ~ 1308 0
2 PSR B0656+14 Psr 06 59 48.18800 +14 14 19.2000   24.85 24.90     ~ 943 1
3 PSR J1809-1917 Psr 18 09 43.147 -19 17 38.10           ~ 128 1
4 HESS J1809-193 gam 18 10 31 -19 18.0           ~ 70 1
5 1LHAASO J1814-1719u gam 18 13.1 -17 53           ~ 5 0
6 SNR G012.7+00.0 SNR 18 13.3 -17 54           ~ 26 0
7 [MFD2008] Stellar Cluster OpC 18 13 24.0 -17 53 31           ~ 17 0
8 NAME AGPS 273.4-17.8 SNR 18 13 35.05 -17 49 58.1           ~ 145 2
9 SNR G012.8-00.0 SNR 18 13.6 -17 49           ~ 68 0
10 2HWC J1814-173 gam 18 13 42.7 -17 27 55           ~ 9 0
11 1AGL J1815-1732 gam 18 14 05 -17 36.1           ~ 30 0
12 W 33 SFR 18 14 14.0 -17 55 50           ~ 292 0
13 1LHAASO J1814-1636u gam 18 14.9 -16 37           ~ 4 0
14 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 460 1

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