Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30067d&link_type=abstract
Spitzer Proposal ID #30067
Physics
Scientific paper
We will use the SPITZER to continue the ongoing monitoring of SN1987A, the youngest supernova remnant that is undergoing noticable evolutionary changes during the lifetime of the Great Observatories. At infrared wavelengths SN1987A provides a unique complimentary view of the interaction of the SN blast wave with the equatorial ring (ER). Dust in theÊ ERÊ is being swept up by the expanding shock and collisionally heated by the X-ray emitting gas observed with CHANDRA, giving rise to IR emission that reveals the composition and amount of dust that formed in the outflow of the presupernova star. The IR observations also provide a unique tool for studying physical processes - the collisional heating and destruction of dust -Ê in dusty X-ray emitting plasmas. Parts of the blast wave has penetrated the denser regions of the ER, creating the "hotspots" observed with HUBBLE. IR line emission from these regions provide important information on the physical conditions and theÊelemental and dust composition in these cooling shocks. Additionally, the ejecta of the SN explosion contains dust that was observed to have formed about 530 days after the explosion. Its imminent interaction with the ring will heat up this dust, which will be observable with SPITZER. In addition to providing useful information on SN1987A and its environment, the proposed observations will address key global issues regarding the origin and evolution of dust in the universe: how much dust is formed in SN ejecta and in quiescent stellar outflows, and how efficiently grains are destroyed by interstellar shock waves.
Arendt Richard
Bouchet Patrice
Burrows David
Challis Peter
Danziger John
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