Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7

Cara E. Rakowski, Carles Badenes, B. M. Gaensler, Joseph (Yosi) Gelfand, John P. Hughes, Patrick O. Slane

    Research output: Contribution to journalArticle

    Abstract

    In this paper we use recent X-ray and radio observations of the ejecta-rich Galactic SNR G337.2-0.7 to determine properties of the SN explosion that formed this source. H I absorption measurements from ATCA constrain the distance to G337.2-0.7 to lie between 2.0 ± 0.5 and 9.3 ± 0.3 kpc. Combined with a clear radio image of the outer blast wave, this distance allows us to estimate the dynamical age (between 750 and 3500 yr) from the global X-ray spectrum obtained with the XMM-Newton and Chandra observatories. The presence of ejecta is confirmed by the pattern of fitted relative abundances, which show Mg, Ar, and Fe to be less enriched (compared to solar) than Si, S, or Ca, and the ratio of Ca to Si to be 3.4 ± 0.8 times the solar value (under the assumption of a single electron temperature and single ionization timescale). With the addition of a solar abundance component for emission from the blast wave, these abundances (with the exception of Fe) resemble the ejecta of a Type Ia, rather than core-collapse, SN. Comparing directly to models of the ejecta and blast wave X-ray emission calculated by evolving realistic SN Ia explosions to the remnant stage allows us to deduce that one-dimensional delayed-detonation and pulsed delayed-detonation models can indeed reproduce the major features of the global spectrum. In particular, stratification of the ejecta, with the Fe shocked most recently, is required to explain the lack of prominent Fe K emission.

    Original languageEnglish (US)
    Pages (from-to)982-1000
    Number of pages19
    JournalAstrophysical Journal
    Volume646
    Issue number2 I
    DOIs
    StatePublished - Aug 1 2006

    Fingerprint

    supernova remnants
    ejecta
    blasts
    detonation
    x rays
    explosions
    explosion
    radio
    radio observation
    XMM-Newton telescope
    stratification
    newton
    relative abundance
    observatories
    ionization
    observatory
    electron energy
    timescale
    electron
    estimates

    Keywords

    • Nuclear reactions, nucleosynthesis, abundances
    • Supernova remnants
    • Supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Nuclear and High Energy Physics

    Cite this

    Rakowski, C. E., Badenes, C., Gaensler, B. M., Gelfand, J. Y., Hughes, J. P., & Slane, P. O. (2006). Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7. Astrophysical Journal, 646(2 I), 982-1000. https://doi.org/10.1086/505018

    Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7. / Rakowski, Cara E.; Badenes, Carles; Gaensler, B. M.; Gelfand, Joseph (Yosi); Hughes, John P.; Slane, Patrick O.

    In: Astrophysical Journal, Vol. 646, No. 2 I, 01.08.2006, p. 982-1000.

    Research output: Contribution to journalArticle

    Rakowski, CE, Badenes, C, Gaensler, BM, Gelfand, JY, Hughes, JP & Slane, PO 2006, 'Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7', Astrophysical Journal, vol. 646, no. 2 I, pp. 982-1000. https://doi.org/10.1086/505018
    Rakowski CE, Badenes C, Gaensler BM, Gelfand JY, Hughes JP, Slane PO. Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7. Astrophysical Journal. 2006 Aug 1;646(2 I):982-1000. https://doi.org/10.1086/505018
    Rakowski, Cara E. ; Badenes, Carles ; Gaensler, B. M. ; Gelfand, Joseph (Yosi) ; Hughes, John P. ; Slane, Patrick O. / Can ejecta-dominated supernova remnants be typed from their X-ray spectra? The case of G337.2-0.7. In: Astrophysical Journal. 2006 ; Vol. 646, No. 2 I. pp. 982-1000.
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