Spectral components of the radio composite supernova remnant G11.2-0.3

Cindy Tam, Mallory Roberts, Victoria M. Kaspi

    Research output: Contribution to journalArticle

    Abstract

    We present a high-resolution radio study of the supernova remnant (SNR) G11.2-0.3 using archival Very Large Array data. Spectral tomography is performed to determine the properties of this composite-type SNR's individual components, which have only recently been distinguished through X-ray observations. Our results indicate that the spectral index of the pulsar wind nebula (PWN), or plerion, is αP = 0.25-0.10 -0.05. We observe a spectral index of αS = 0.56 ± 0.02 throughout most of the SNR shell region but also detect a gradient in α in the southeastern component. We compare the spectral index and flux density with recent single-dish radio data of the source. Also, the radio efficiency and morphological properties of this PWN are found to be consistent with results for other known PWN systems.

    Original languageEnglish (US)
    Pages (from-to)202-208
    Number of pages7
    JournalAstrophysical Journal
    Volume572
    Issue number1 I
    DOIs
    StatePublished - Jan 1 2002

    Fingerprint

    supernova remnants
    nebulae
    pulsars
    radio
    composite materials
    Very Large Array (VLA)
    parabolic reflectors
    tomography
    flux density
    shell
    gradients
    high resolution
    index
    x rays

    Keywords

    • Pulsars: individual (PSR J1811-1925)
    • Radio continuum: ISM
    • Supernova remnants
    • Supernovae: individual (G11.2-0.3)

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Spectral components of the radio composite supernova remnant G11.2-0.3. / Tam, Cindy; Roberts, Mallory; Kaspi, Victoria M.

    In: Astrophysical Journal, Vol. 572, No. 1 I, 01.01.2002, p. 202-208.

    Research output: Contribution to journalArticle

    Tam, Cindy ; Roberts, Mallory ; Kaspi, Victoria M. / Spectral components of the radio composite supernova remnant G11.2-0.3. In: Astrophysical Journal. 2002 ; Vol. 572, No. 1 I. pp. 202-208.
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