In the BAG: Spitzer observations of the `born-again' phenomenon

Details In the BAG: Spitzer observations of the `born-again' phenomenon In the BAG: Spitzer observations of the `born-again' phenomenon

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3362e&link_type=abstract

Spitzer Proposal ID #3362

Physics

Scientific paper

We will use the unique capabilities of Spitzer to probe the environments of 'born-again' objects. These are evolved stars - typically of solar mass - which are on their way to becoming white dwarfs but reignite helium and retrace their evolution back up to the giant region of the H-R diagram. Spitzer will enable us to search for faint, extended far-IR fossil shells, to map out their planetary nebulae and (by combining with ongoing ground-based optical and near-IR observations), to determine the spectral energy distribution (SED) from the visible to the far-IR. Spitzer will also allow us to observe one of these systems in M31 and, because it is at a known distance, we will be able to determine unambiguously the energetics of one of these objects. These observations will help us to understand the major upheaval, only recently discovered, that is undergone by perhaps as many as 20% of solar mass stars, and hence provide us with a glimpse of what the Sun could have in store.

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