2018A&A...612A..13H


Query : 2018A&A...612A..13H

2018A&A...612A..13H - Astronomy and Astrophysics, volume 612A, 13-13 (2018/4-1)

HESS J1741-302: a hidden accelerator in the Galactic plane.

HESS COLLABORATION, ABDALLA H., ABRAMOWSKI A., AHARONIAN F., AIT BENKHALI F., ANGUNER E.O., ARAKAWA M., ARMAND C., ARRIETA M., BACKES M., BALZER A., BARNARD M., BECHERINI Y., BECKER TJUS J., BERGE D., BERNHARD S., BERNLOHR K., BLACKWELL R., BOTTCHER M., BOISSON C., BOLMONT J., BONNEFOY S., BORDAS P., BREGEON J., BRUN F., BRUN P., BRYAN M., BUCHELE M., BULIK T., CAPASSO M., CAROFF S., CAROSI A., CASANOVA S., CERRUTI M., CHAKRABORTY N., CHAVES R.C.G., CHEN A., CHEVALIER J., COLAFRANCESCO S., CONDON B., CONRAD J., DAVIDS I.D., DECOCK J., DEIL C., DEVIN J., DEWILT P., DIRSON L., DJANNATI-ATAI A., DONATH A., DRURY L.O'C., DYKS J., EDWARDS T., EGBERTS K., EMERY G., ERNENWEIN J.-P., ESCHBACH S., FARNIER C., FEGAN S., FERNANDES M.V., FIASSON A., FONTAINE G., FUNK S., FUSSLING M., GABICI S., GALLANT Y.A., GARRIGOUX T., GATE F., GIAVITTO G., GLAWION D., GLICENSTEIN J.F., GOTTSCHALL D., GRONDIN M.-H., HAHN J., HAUPT M., HAWKES J., HEINZELMANN G., HENRI G., HERMANN G., HINTON J.A., HOFMANN W., HOISCHEN C., HOLCH T.L., HOLLER M., HORNS D., IVASCENKO A., IWASAKI H., JACHOLKOWSKA A., JAMROZY M., JANKOWSKY D., JANKOWSKY F., JINGO M., JOUVIN L., JUNG-RICHARDT I., KASTENDIECK M.A., KATARZYNSKI K., KATSURAGAWA M., KATZ U., KERSZBERG D., KHANGULYAN D., KHELIFI B., KING J., KLEPSER S., KLOCHKOV D., KLUZNIAK W., KOMIN N., KOSACK K., KRAKAU S., KRAUS M., KRUGER P.P., LAFFON H., LAMANNA G., LAU J., LEFAUCHEUR J., LEMIERE A., LEMOINE-GOUMARD M., LENAIN J.-P., LESER E., LOHSE T., LORENTZ M., LIU R., LOPEZ-COTO R., LYPOVA I., MALYSHEV D., MARANDON V., MARCOWITH A., MARIAUD C., MARX R., MAURIN G., MAXTED N., MAYER M., MEINTJES P.J., MEYER M., MITCHELL A.M.W., MODERSKI R., MOHAMED M., MOHRMANN L., MORA K., MOULIN E., MURACH T., NAKASHIMA S., DE NAUROIS M., NDIYAVALA H., NIEDERWANGER F., NIEMIEC J., OAKES L., O'BRIEN P., ODAKA H., OHM S., OSTROWSKI M., OYA I., PADOVANI M., PANTER M., PARSONS R.D., PEKEUR N.W., PELLETIER G., PERENNES C., PETRUCCI P.-O., PEYAUD B., PIEL Q., PITA S., POIREAU V., PROKHOROV D.A., PROKOPH H., PUHLHOFER G., PUNCH M., QUIRRENBACH A., RAAB S., RAUTH R., REIMER A., REIMER O., RENAUD M., DE LOS REYES R., RIEGER F., RINCHIUSO L., ROMOLI C., ROWELL G., RUDAK B., RULTEN C.B., SAHAKIAN V., SAITO S., SANCHEZ D.A., SANTANGELO A., SASAKI M., SCHLICKEISER R., SCHUSSLER F., SCHULZ A., SCHWANKE U., SCHWEMMER S., SEGLAR-ARROYO M., SEYFFERT A.S., SHAFI N., SHILON I., SHININGAYAMWE K., SIMONI R., SOL H., SPANIER F., SPIR-JACOB M., STAWARZ L., STEENKAMP R., STEGMANN C., STEPPA C., SUSHCH I., TAKAHASHI T., TAVERNET J.-P., TAVERNIER T., TAYLOR A.M., TERRIER R., TIBALDO L., TIZIANI D., TLUCZYKONT M., TRICHARD C., 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., VIANA A., VINCENT P., VINK J., VOISIN F., VOLK H.J., VUILLAUME T., WADIASINGH Z., WAGNER S.J., WAGNER P., WAGNER R.M., WHITE R., WIERZCHOLSKA A., WILLMANN P., WORNLEIN A., WOUTERS D., YANG R., ZABOROV D., ZACHARIAS M., ZANIN R., ZDZIARSKI A.A., ZECH A., ZEFI F., ZIEGLER A., ZORN J., ZYWUCKA N. (The NANTEN Collaboration), ENOKIYA R., FUKUI Y., HAYAKAWA T., OKUDA T., TORII K. and YAMAMOTO H.

Abstract (from CDS):

The H.E.S.S. Collaboration has discovered a new very high energy (VHE, E>0.1TeV) γ-ray source, HESS J1741-302, located in the Galactic plane. Despite several attempts to constrain its nature, no plausible counterpart has been found so far at X-ray and MeV/GeV γ-ray energies, and the source remains unidentified. An analysis of 145-h of observations of HESS J1741-302 at VHEs has revealed a steady and relatively weak TeV source (∼1% of the Crab Nebula flux), with a spectral index of Γ=2.3±0.2stat±0.2sys, extending to energies up to 10TeV without any clear signature of a cut-off. In a hadronic scenario, such a spectrum implies an object with particle acceleration up to energies of several hundred TeV. Contrary to most H.E.S.S. unidentified sources, the angular size of HESS J1741-302 is compatible with the H.E.S.S. point spread function at VHEs, with an extension constrained to be below 0.068° at a 99% confidence level. The γ-ray emission detected by H.E.S.S. can be explained both within a hadronic scenario, due to collisions of protons with energies of hundreds of TeV with dense molecular clouds, and in a leptonic scenario, as a relic pulsar wind nebula, possibly powered by the middle-aged (20kyr) pulsar PSR B1737-30. A binary scenario, related to the compact radio source 1LC 358.266+0.038 found to be spatially coincident with the best fit position of HESS J1741-302, is also envisaged.

Abstract Copyright: © ESO 2018

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

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 - 2022
#notes
1 M 1 SNR 05 34 32 +22 00.8           ~ 5955 1
2 PSR J1739-3023 Psr 17 39 39.85 -30 23 11.2           ~ 36 0
3 Fermi J1740.1-3013 gam 17 40 06.0 -30 13 00           ~ 3 0
4 PSR B1737-30.2 Psr 17 40 33.82 -30 15 43.5           ~ 200 0
5 IRAS 17376-3021 OH* 17 40 54.1392464736 -30 22 38.055031680           ~ 27 0
6 PSR J1741-3016 Psr 17 41 07.04 -30 16 31.0           ~ 18 0
7 WR 98a WR* 17 41 13.0411858104 -30 32 30.409373688   18.40   15.20 13.82 WC8/9 98 1
8 HESS J1741-302 gam 17 41 15.79827 -30 22 37.2040           ~ 28 0
9 1LC 358.266+0.038 Rad 17 41 17.10 -30 23 30.9           ~ 6 0
10 2MASS J17411910-3023043 V* 17 41 19.11 -30 23 04.4           ~ 2 0
11 [B61] 2 s*b 17 41 35.4358256400 -30 06 38.782127520   18.0 15.00 14.23 10.30 LBV_B[e]: 44 0
12 2CG 359+00 gam 17 45 11 -30 11.9           ~ 94 0
13 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13182 0
14 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 535 2

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2022.09.27-04:42:30

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