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Session 40 - Supernova Remnants & SN 1987A.
Display session, Thursday, January 08
Exhibit Hall,
The galactic supernova remnant G299.2-2.9 was first identified as a SNR in the ROSAT All-Sky Survey (RASS) data in 1995. These data suggested a center-filled remnant 0.5 kpc distant, approximately 1000 years old, with a low initial kinetic energy. Slane, et al. pointed out that the issues of distance, age, and initial energy were poorly constrained by the ROSAT data and that the possibility of a more typically energetic, more distant remnant provided a more plausible interpretation. Recent observations of G299.2-2.9 with ASCA as well as optical observations reveal a remnant that, although not center-filled, has substantial emission within its borders. Spectroscopic and optical analyses also confirm that the G299.2-2.9 is a middle-aged SNR, being approximately 5 kpc distant and of slightly below-average explosion energy.
