2001/05/03 by C. R. Canizares, Kathryn A. Flanagan, Canizares, C. R. +13
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0105060
9 pages, 5 figures; To be published in Young Supernova Remnants: Eleventh Astrophysics Conference, College Park, Maryland, October 2000 (AIP Conference Proceedings), eds. S. S. Holt and U. Hwang (American Institute of Physics, Melville, NY)
arxiv created 2001/05/03 · openalex publication_date 2001/05/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The HETG can be used to obtain spatially resolved spectra of moderately\nextended sources. We present preliminary results for two well studied, oxygen\nrich supernova remnants in the Magellanic clouds, E0102-72 and N132D. The\ndispersed spectrum of E0102-72 shows images of the remnant in the light of\nindividual emission lines from H-like and He-like ions of O, Mg, Ne and He-like\nSi with no evidence of Fe. The diameters of the images for various ions,\nmeasured in the cross-dispersion direction, increase monotonically with the\nionization age for the given ion. This shows in detail the progression of the\nreverse shock through the expanding stellar ejecta. We see clear evidence for\nasymmetric Doppler shifts across E0102-72 of ~2000 km/s. These can be modelled\napproximately by a partially-filled, expanding shell inclined to the line of\nsight. The dispersed spectrum of N132D is more affected by spatial/spectral\noverlap but also shows monochromatic images in several strong lines.\nPreliminary spectra have been extracted for several bright knots. Some regions\nof oxygen-rich material, presumably stellar ejecta, are clearly identified.\nAdditional details on E0102-72 are presented by Flanagan et al. and Davis et\nal. in these proceedings, and further analysis is in progress.\n