AbstractIn a recent paper Heinz and Sunyaev suggest that relativistic jets observed in microquasars might result in narrow features in the energy spectra of heavy cosmic rays with ≈1 to ≈10GeV/nuc. They further argue that such features might be observable if there has been one or more microquasars nearby within the last few million years. We report preliminary results of a search for evidence of such features using data from a 32-day balloon flight of the Trans-Iron Galactic Element Recorder (TIGER). Although this flight took place near solar maximum, calculations of the broadening effects of solar modulation indicate that a narrow feature of sufficient intensity should still be observable. An energy spectrum for iron with high statistical significance has been derived from ≈100,000 Fe events in the energy range from about 2.5 to 10GeV/nuc. Although our preliminary results do not reveal any obvious features, we will discuss the possibility of observing such features with TIGER and other instruments.


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    Title :

    A search for the signature of microquasars in the cosmic ray iron spectrum measured by TIGER


    Contributors:
    Geier, S. (author) / Barbier, L.M. (author) / Binns, W.R. (author) / Christian, E.R. (author) / Cummings, J.R. (author) / deNolfo, G.A. (author) / Hink, P.L. (author) / Israel, M.H. (author) / Labrador, A.W. (author) / Link, J.T. (author)

    Published in:

    Advances in Space Research ; 37 , 10 ; 1955-1959


    Publication date :

    2005-10-22


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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