Light Echoes from a Periodic Protostellar Outburst

Details Light Echoes from a Periodic Protostellar Outburst Light Echoes from a Periodic Protostellar Outburst

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12284m&link_type=abstract

HST Proposal ID #12284. Cycle 18

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Scientific paper

We propose to obtain multi-epoch WFC3IR imaging of a remarkable variable protostar in the IC 348 star forming region. This object, LRLL 54361, exhibits unique outbursts in the infrared that repeat on a roughly 25 day timescale and produce luminosity variations of over an order of magnitude. Images taken with the Spitzer Space Telescope show a resolved scattered light outflow cavity whose morphology changes in concert with the central source, indicating a light echo effect. We need HST observations to characterize the outflow cavity geometry and constrain models of the infalling envelope structure, verify the presence of a binary outflow, and measure shocked emission in the outflow itself. In combination with other proposed and existing observations, these data will help unravel the mystery of this variable source and provide important new insight into the dynamic evolution of young suns.;

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