NOAO >   Observing Info >   Approved Programs >   2015B-0102

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Program Information for 2015B-0102


PI: Paul Wilson Cauley, Wesleyan U., pcauley@wesleyan.edu
Address: Department of Astronomy, 96 Foss Hill Rd., Middletown, CT 06457 USA

CoI: Seth Redfield, Wesleyan U.
CoI: Adam Jensen, University of Nebraska, Kearney
CoI: Michael Endl, U. of Texas, Austin
CoI: William D Cochran, U. of Texas, Austin
CoI: Travis Barman, U. of Arizona
CoI: Girish Duvvuri, Wesleyan U.
CoI: Julian Dann, Wesleyan U.

Title: Searching for Pre-Transit Hydrogen Absorption Around Hot Planets

Abstract: Magnetic fields are a fundamental property of exoplanets and provide vital protection against atmospheric stripping from stellar wind particles. For hot Jupiter exoplanets, the magnetic field can limit the atmospheric mass loss rate and enhance the energy available for star- planet interactions. Our current knowledge of exoplanet magnetic fields, however, is extremely poor. One promising method of detecting these fields around hot Jupiters is the interaction of the planetary magnetosphere with the stellar wind. A bow shock is expected to form around these objects for a large range of hot Jupiter orbital parameters. The dense material at the bow shock can produce pre-transit absorption signatures since the bow is expected to orbit ahead of the planet. We propose to build on our previous detection of a signal consistent with a bow shock around HD 189733 b by attempting to detect these signatures around a sample of other hot Jupiter exoplanets. Pre- transit absorption signatures allow us to estimate the planetary magnetic field strength by assuming pressure balance between the stellar wind and the planetary magnetosphere.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2015B):  WIYN/HYDR -- 4n on Sep 01 2015, Sep 08 2015, Dec 27 2015, Jan 19 2016


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 >   2015B-0102

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