NOAO >   Observing Info >   Approved Programs >   2012B-0106

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Proposal Information for 2012B-0106


PI: John R. Stauffer, Caltech, stauffer@ipac.caltech.edu
Address: Spitzer Science Center, 1200 E. California Blvc., Pasadena, CA 91125, USA

CoI: David Ciardi, IPAC/Caltech
CoI: Julian van Eyken, IPAC/Caltech
CoI: Luisa Rebull, IPAC/Caltech
CoI: Maria Morales-Calderon, IPAC/Caltech
CoI: Andy Boden, Caltech

Title: The Death Spiral of a 1 Myr Exoplanet?

Abstract: With more than a thousand radial velocity and transiting exoplanets now known, the field of exoplanet astrophysics has a strong empirical foundation. However, inferences concerning planet formation are still largely guesswork because no comparable short-period exoplanets have been discovered orbiting pre-main sequence stars. We have recently discovered what we believe to be the first known ``hot Jupiter" orbiting a very young, pre-main sequence star (van Eyken et al. 2012). The candidate very hot Jupiter has an orbital period of 0.448 days and a radius of ~1.9 R_Jup. It orbits a 2-3 Myr old M3 dwarf in the 25 Ori open cluster. Keck HIRES spectra of the star show unusual H(alpha) profile variability which could be associated with gas stripped from the planet by the intense irradiation from its very nearby host star. We propose for four nights of KPNO 4m echelle time in order to (a) determine the physical mechanism for the H(alpha) profile variability and (b) to provide an improved distance to the 25 Ori cluster.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2012B-0106

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