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Matthew Klimek NOAO/CTIO REU Rutgers University Advisors S.D. Points, C. Smith

Matthew Klimek NOAO/CTIO REU Rutgers University Advisors S.D. Points, C. Smith. A Multi-wavelength Investigation of Newly Discovered Supernova Remnants in the Large Magellanic Cloud. Scientific Motivation. The ISM is dynamic SNRs inject the high temperature phase

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Matthew Klimek NOAO/CTIO REU Rutgers University Advisors S.D. Points, C. Smith

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  1. Matthew Klimek NOAO/CTIO REU Rutgers University Advisors S.D. Points, C. Smith A Multi-wavelength Investigation of Newly Discovered Supernova Remnants in the Large Magellanic Cloud

  2. Scientific Motivation • The ISM is dynamic • SNRs inject the high temperature phase • Multiple SNRs form superbubbles which vent into galactic halos • Stars bake H into heavy elements which are released by SNRs • Understand SNRs, understand the ISM! (better) • Complete survey needed • Extinction and distance measurement poor in MW • M33 survey complete, but too far to resolve detail • Previous LMC X-ray survey limited by ROSAT sensitivity

  3. Observations • Magellenic Cloud Emission Line Survey • Ha, [S II], [O III], red, green • Curtis Schmidt Telescope @ CTIO • 1.3x1.3 FOV; ang. res. ~4”6 • New XMM-Newton observations based on MCELS results • 30' FOV; PSF 6” FWHM; sensitive in 0.15-15 keV • Australia Telescope Compact Array 4.8/8.6 GHz radio LMC mosaics • 7085 individual pointings, total 6x6 • 4.8-GHz have 33” FWHM • 8 pc spatial res. at the LMC

  4. Detecting New SNRs: [S II]/Ha • Ratio of [S II] to Ha is an effective discriminant of shocked regions to photoionized regions. • ~0.4-1.0 in shocks • ~0.1 in photoionized

  5. Answer!!

  6. Optical Methods • Cleaned, scaled to 2”/px, calibrated to surface brightness, corrected for continuum emission • Electron density calculated from Ha surface brightness • Measured radius and thickness of shell • Expansion velocity from echelle spectra • Allows calculation of mass, kinetic energy, pressure

  7. X-ray methods • Calibrated photon events file produced in SAS • Light curves inspected for high background times • Source & background regions selected for spectra

  8. Spectral Methods: wabs(apec + raymond + powerlaw) • Raymond-Smith thermal plasma • keV, abundances (fixed 0.3), normalization • Power law for high energy tail • photon index, normalization • Apec for local hot gas • keV (fixed 0.1), abundances (fixed 1.0), normalization • Wisconsin absorption • hydrogen column density

  9. SNR J0449-6921

  10. SNR J0506-6541

  11. SNR J0537-6628

  12. Special Case of SNR J0517-

  13. Future Work • Choose good estimate of f • Investigate cool shell • Investigate SNR 0517! • Re-extract spectra in ESAS • Jointly fit seperate regions • Timing analysis of possible point source

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