NOAO >   Observing Info >   Approved Programs >   2019A-0902

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Program Information for 2019A-0902


PI: Mark Everett, WIYN, everett@noao.edu
Address: 950 N. Cherry Ave., Tucson, AZ 85719 USA

CoI: Steve B Howell, NASA Ames Research Center
CoI: Elliott P Horch, SCSU
CoI: Johanna Teske, Carnegie Institution of Washington

Title: Speckle Imaging to Characterize late-K & M Dwarf TESS Targets near the North Ecliptic Pole

Abstract: Our survey represents a third Spring semester follow-up to a speckle imaging campaign at WIYN. The target stars are potential low-mass transiting exoplanet host stars, well positioned near the North Ecliptic Pole for light curve observations with NASA's TESS Mission. A set of 142 dwarfs has been observed using NESSI, providing deep speckle images to search for gravitationally-bound companions and nearby field stars, and set limits on undetected sources in close proximity to the targets. The results will provide a pre-TESS survey sample of some of the most important potential exoplanet hosts, relatively bright K7 and later dwarfs selected through their high proper motions or Gaia parallaxes. It is important to understand the multiplicity of planet hosts in a magnitude-limited sample to determine how planet characteristics may be affected by multiplicity. Photometry from the speckle imaging will also be useful to deblend TESS light curves, correcting planet properties for this effect. In addition to speckle imaging, other color-calibration data were taken in earlier semesters to understand the NESSI color system vs. spectral type. This semester, we propose to re-observe the known multiple targets to find relative proper motions or orbital motions (which now may be seen with a third epoch). Any extra time will be used to refine the color calibrations or to extend the sample to fainter magnitudes.

Program Type: DD

Scheduled Nights:
Run 1 (2019A):  WIYN/NESSI -- 1n on Jul 19 2019


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



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