info:eu-repo/semantics/article
HESS observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae
Fecha
2012-07Registro en:
Abramowski, A.; Acero, F.; Aharonian, F.; Akhperjanian, A. G.; Anton, G.; et al.; HESS observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 424; 1; 7-2012; 128-135
0035-8711
CONICET Digital
CONICET
Autor
Abramowski, A.
Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anton, G.
Balzer, A.
Barnacka, A.
Becherini, Y.
Becker, J.
Bernlöhr, K.
Birsin, E.
Biteau, J.
Bochow, A.
Boisson, C.
Bolmont, J.
Bordas, P.
Brucker, J.
Brun, F.
Brun, P.
Bulik, T.
Büsching, I.
Carrigan, S.
Casanova, S.
Cerruti, M.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Cheesebrough, A.
Cologna, G.
Conrad, J.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Degrange, B.
Deil, C.
Dickinson, H. J.
Djannati Ataï, A.
Domainko, W.
Drury, L. O'C.
Dubus, G.
Dutson, K.
Dyks, J.
Dyrda, M.
Egberts, K.
Eger, P.
Espigat, P.
Fallon, L.
Fegan, S.
Feinstein, F.
Fernandes, M. V.
Fiasson, A.
Fontaine, G.
Förster, A.
Füßling, M.
Gallant, Y. A.
Garrigoux, T.
Gast, H.
Gérard, L.
Giebels, B.
Glicenstein, J. F.
Glück, B.
Göring, D.
Grondin, M. H.
Häffner, S.
Hague, J. D.
Hahn, J.
Hampf, D.
Harris, J.
Hauser, M.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hillert, A.
Hinton, J. A.
Hofmann, W.
Hofverberg, P.
Holler, M.
Horns, D.
Jacholkowska, A.
Jahn, C.
Jamrozy, M.
Jung, I.
Kastendieck, M. A.
Katarzyński, K.
Katz, U.
Kaufmann, S.
Khélifi, B.
Klochkov, D.
Klu?niak, W.
Kneiske, T.
Komin, Nu.
Kosack, K.
Kossakowski, R.
Krayzel, F.
Laffon, H.
Lamanna, G.
Lenain, J. P.
Lennarz, D.
Lohse, T.
Lopatin, A.
Lu, C. C.
Marandon, V.
Marcowith, A.
Masbou, J.
Maurin, G.
Maxted, N.
Mayer, M.
McComb, T. J. L.
Medina, Maria Clementina
Méhault, J.
Moderski, R.
Mohamed, M.
Moulin, E.
Naumann, C. L.
Naumann-Godo, M.
de Naurois, M.
Nedbal, D.
Nekrassov, D.
Nguyen, N.
Nicholas, B.
Niemiec, J.
Nolan, S. J.
Ohm, S.
de Oña Wilhelmi, E.
Opitz, B.
Ostrowski, M.
Oya, I.
Panter, M.
Paz Arribas, M.
Pekeur, N. W.
Pelletier, G.
Perez, J.
Petrucci, P. O.
Peyaud, B.
Pita, S.
Pühlhofer, G.
Punch, M.
Quirrenbach, A.
Raue, M.
Reimer, A.
Reimer, O.
Renaud, M.
de los Reyes, R.
Rieger, F.
Ripken, J.
Rob, L.
Rosier Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Sahakian, V.
Sanchez, D. A.
Santangelo, A.
Schlickeiser, R.
Schulz, A.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Sheidaei, F.
Skilton, J. L.
Sol, H.
Spengler, G.
Stawarz, Ł
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Stycz, K.
Sushch, I.
Szostek, A.
Tavernet, J. P.
Terrier, R.
Tluczykont, M.
Valerius, K.
van Eldik, C.
Vasileiadis, G.
Venter, C.
Viana, A.
Vincent, P.
Völk, H. J.
Volpe, F.
Vorobiov, S.
Vorster, M.
Wagner, S. J.
Ward, M.
White, R.
Wierzcholska, A.
Zacharias, M.
Zajczyk, A.
Zdziarski, A.A.
Zech, A.
Zechlin, H. S.
Montmerle, T.
Resumen
The massive binary system Eta Carinae and the surrounding Hii complex, the Carina nebula, are potential particle acceleration sites from which very high energy (VHE; E≥ 100GeV) γ-ray emission could be expected. This paper presents data collected during VHE γ-ray observations with the HESS telescope array from 2004 to 2010, which cover a full orbit of Eta Carinae. In the 33.1-h data set no hint of significant γ-ray emission from Eta Carinae has been found and an upper limit on the γ-ray flux of (99per cent confidence level) is derived above the energy threshold of 470GeV. Together with the detection of high energy (HE; 0.1 ≤E≤ 100GeV) γ-ray emission by the Fermi Large Area Telescope up to 100GeV, and assuming a continuation of the average HE spectral index into the VHE domain, these results imply a cut-off in the γ-ray spectrum between the HE and VHE γ-ray range. This could be caused either by a cut-off in the accelerated particle distribution or by severe γ-γ absorption losses in the wind collision region. Furthermore, the search for extended γ-ray emission from the Carina nebula resulted in an upper limit on the γ-ray flux of (99per cent confidence level). The derived upper limit of ∼23 on the cosmic ray enhancement factor is compared with results found for the old-age mixed-morphology supernova remnant W28. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.