A spatial and spectral analysis of the emission from the supernova remnant G266.2-1.2

Glenn E. Allen, Tracey Delaney, Miroslav Filipović, John C. Houck, Thomas G. Pannuti, Michael D. Stage

    Research output: Chapter in Book / Conference PaperConference Paperpeer-review

    Abstract

    ![CDATA[G266.2-1.2 is a recently discovered supernova remnant observed to produce faint radio and Xray emission as well as TeV gamma rays. The age, distance, and gamma-ray emission mechanism have been a source of controversy. To help determine the age and distance, we present the results of an analysis of our 2003 and 2008 Chandra observations of the northwestern region. These results show that the remnant is expanding at the rate of 0.43±0.09 arcsec yr-1 from which the age and distance are inferred to be 2-9 kyr and 1-3 kpc, respectively. Furthermore, the ambient density is inferred to be less than 0.1 cm-3, perhaps much less. To help determine whether the TeV gamma rays are produced by electrons or protons, we present the results of a joint spectral analysis of some radio, X-ray, and gamma-ray data. It is possible to fit the broad-band data with a simple, single-zone, leptonic model. However, if the TeV emission is dominated by the decay of neutral pions, then very-high-energy protons must outnumber very-high-energy electrons by a ratio that is much larger than the ratio observed locally (i.e. the ratio expected from charge conservation).]]
    Original languageEnglish
    Title of host publicationProceedings of Science: The Extreme and Variable High Energy Sky, Extremesky 2011: September 19-23, 2011, Chia Laguna (Cagliari), Italy
    PublisherScuola Internazionale Superiore di Studi Avanzati
    Number of pages6
    Publication statusPublished - 2011
    EventExtremesky -
    Duration: 19 Sept 2011 → …

    Publication series

    Name
    ISSN (Print)1824-8039

    Conference

    ConferenceExtremesky
    Period19/09/11 → …

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