Computer Science
Scientific paper
Feb 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop...57m&link_type=abstract
NOAO Proposal ID #2008A-0057
Computer Science
Scientific paper
The recent detection of a Neptune-mass exoplanet candidate around the low-mass star GJ 176 is an important and exciting discovery in the field of extrasolar planets (Endl et al 2007). While Jupiter mass companions to low mass stars appear to be rare, several Neptune sized objects have been found around M dwarfs. This suggests that companion mass may scale with primary mass, an intriguing result for modeling planet formation. Further, five of the six M dwarfs known to have planetary companions have more than one. Refining the orbit of GJ 176b will help determine if this star, too, hosts a multiple-planet system. However, the discovery data are scattered over 4 years and lack periods of high observing cadence resulting in ambiguities when interpreting the results. The measurement windowing function introduces aliasing which prevents unique determination of the companion's orbital period. A more conclusive evaluation of the nature of the companion will be enabled by high-cadence observations, which avoid aliasing issues by providing a more continuous windowing function over several companion orbits. We propose to monitor GJ 176 for 21 consecutive nights to cover 2 full orbits of the companion to GJ 176.
Edelstein Jerry
Johnson John
Muterspaugh Matthew
Wright Jonathan
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