Spitzer planet limits around a pulsating white dwarf

Details Spitzer planet limits around a pulsating white dwarf Spitzer planet limits around a pulsating white dwarf

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jphcs.172a2056m&link_type=abstract

Journal of Physics: Conference Series, Volume 172, Issue 1, pp. 012056 (2009).

Physics

Scientific paper

We present infrared observations in search of a planet around the white dwarf GD66. Time-series photometry of GD66 shows a variation in the arrival time of stellar pulsations consistent with the presence of a planet with mass = 2.4 MJ. Any such planet is too close to the star to be resolved, but the planet's light can be directly detected as an excess flux at 4.5 μm. We observed GD66 with the two shorter wavelength channels of IRAC on Spitzer but did not find strong evidence of a companion, placing an upper limit of 5-7 MJ on the mass of the companion, assuming an age of 1.2-1.7 Gyr.

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