Dynamic Decretion Disks in the Magellanic Clouds

Details Dynamic Decretion Disks in the Magellanic Clouds Dynamic Decretion Disks in the Magellanic Clouds

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80049w&link_type=abstract

Spitzer Proposal ID #80049

Physics

Scientific paper

We propose to use the exquisite sensitivity of Spitzer to revolutionize our understanding of viscous decretion disks which surround rapidly rotating massive stars. Using 8 epochs (1 every 30-45 days) of deep 3.6 and 4.5 micron IRAC imagery, we propose to monitor >650 B-type stars in 4 young clusters in the SMC/LMC to a) perform the first statistical test of the prevalence and duration of large-scale disk-loss/disk-renewal events in classical Be stars in low metallicity environments; and b) begin to constrain the time-dependence of the stellar mass-loss rate in these systems. Our investigation would triple the number of B stars that have been systematically monitored to statistically investigate this phenomenon. Major disk dispersal/regeneration events represent an ideal time to investigate the fundamental mechanism(s) driving disk formation around Be stars; hence, our proposed Spitzer systematic study has the potential to revolutionize our understanding of viscous decretion disks.

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