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Search For OVI Emission From The Shocked Circumstellar Gas of SN 1987A
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi.
2007 (engelsk)Inngår i: American Astronomical Society, AAS Meeting #211: Bulletin of the American Astronomical Society, 2007Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

A search for O VI 1032-38 Å emission from the circumstellar shock interaction zones of SN 1987A was made with the FUSE satellite. The shock interaction of supernova ejecta with the dense inner ring began in the mid-1990s. Broad (FWHM ~300 km s−1) emission from optical coronal lines (e.g. [Fe X], [Fe XI], and [Fe XIV]) has emerged and increased exponentially in strength. O VI emission is expected to track the coronal lines and is expected to be the primary cooling transition for the million-degree shocked gas. In the most recent FUSE observation of SN 1987A, June 2004, a weak broad O VI feature may be present. An upper limit on the intrinsic O VI flux is ~1×10−13 erg cm−2 s−1 (corrected for foreground Galactic and LMC extinction). A follow-up observation of planned for mid-2007.

sted, utgiver, år, opplag, sider
2007.
Emneord [en]
circumstellar matter, supernovae, supernova remnants
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-15474OAI: oai:DiVA.org:su-15474DiVA, id: diva2:181994
Tilgjengelig fra: 2008-12-03 Laget: 2008-12-03bibliografisk kontrollert

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