Cool, spatially resolved substellar and exoplanetary analogues at white dwarfs

Details Cool, spatially resolved substellar and exoplanetary analogues at white dwarfs Cool, spatially resolved substellar and exoplanetary analogues at white dwarfs

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60161b&link_type=abstract

Spitzer Proposal ID #60161

Computer Science

Scientific paper

We propose to obtain second epoch IRAC 4.5 micron images of 87 nearby white dwarfs that were originally observed at the same wavelength during the first two cycles of the Spitzer mission. By combining the data at these two epochs, we will search for spatially resolved T and sub-T-type brown dwarf, and massive planetary companions via common proper motions with their primaries. These observations will comprise the deepest survey to date for wide substellar and planetary-mass companions to white dwarfs in the solar neighborhood. Owing to the known distance and age of each white dwarf, any companions identified in this program would provide a benchmark for examining evolutionary models at ages from a few 100 Myr to several Gyr. This survey will also provide the best statistical limits yet on the frequency of such objects at white dwarfs and their intermediate mass, main-sequence progenitors.

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