NOAO >   Observing Info >   Approved Programs >   2009B-0017

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Proposal Information for 2009B-0017


PI: Nadya Gorlova, University of Florida, ngorlova@astro.ufl.edu
Address: Astronomy Department, 211 Bryant Space Science Center, PO Box 112055, Gainesville, FL 32611, USA

CoI: Alex Lobel, Royal Observatory of Belgium

Title: Post-Outburst Dust Formation in Warm Hypergiant Rho Cassiopeiae

Abstract: We propose to observe the eruptive yellow hypergiant Rho Cassiopeiae with the low-resolution 10 micron grating using the Michelle instrument on Gemini North. This peculiar supergiant star reveals very exceptional spectral properties. The proposed Michelle observation will provide a unique opportunity to record expected changes of \rho Cas's mid-IR spectral energy distribution following the massive outburst event of the cool hypergiant in 2000-2001. For the first time we may detect silicate dust expected to condense out of the gas phase in a shell expelled during the outburst. The observation will be crucial for understanding whether or not winds in intermediate cool supergiants can be driven by radiation pressure on dust.


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NOAO >   Observing Info >   Approved Programs >   2009B-0017

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