Exoplanet Tracker Observations with a Monolithic Fixed-Delay Interferometer: First Steps Towards Long-term Stability

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We present initial results from observations of a set of standard stars using the Exoplanet Tracker (ET) instrument at Kitt Peak National Observatory with a monolithic fixed-delay interferometer. By using a monolithic fixed-delay interferometer we eliminate any moving components associated with the actively-controlled interferometer that is currently used by the ET instrument. We observe stars with known short-period planets as well as RV-stable reference stars. We obtain an estimated RMS of 10 m/s on the RV stable star 36 Uma as well as estimated RMS values of 11.1 and 12.5 m/s for the known planetary systems rho Crb and 55 Cnc, respectively. Use of a monolithic fixed-delay interferometer, combined with a temperature and pressure controlled environment, could produce a long-term stable ET instrument capable of performing an all-sky survey for long-period planets, including those in the Habitability Zone of their parent star.

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