Measuring the Expansion Rate of G266.2-1.2

Details Measuring the Expansion Rate of G266.2-1.2 Measuring the Expansion Rate of G266.2-1.2

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2401a&link_type=abstract

Chandra Proposal ID #09500628

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Chandra Proposal Id #09500628

Scientific paper

We propose to reobserve the bright northwestern rim of G266.2-1.2 five years after our first observation of this region. The goal of the new observation is to measure the expansion rate of the remnant and constrain its age. The age of the remnant is controversial. Some report evidence of line emission associated with the decay to titanium-44, which implies that the remnant must be young (< 1200 yr). Others find no such evidence and argue that the absorption column density favors a large distance (and older) remnant. If the expansion over the last four years < 6.0", then the remnant is too old (> 1200 yr) to have a significant amount of titanium-44 left. If the expansion is much larger, then the results indicate the remnant is young enough to contain a substantial amount of titanium-44.

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