NOAO >   Observing Info >   Approved Programs >   2017A-0177

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Program Information for 2017A-0177


PI: Nic Scott, NASA Ames Research Center, nic.scott.9@gmail.com
Address: Space Science, Moffett Field, Mountain View, CA 94035 USA

CoI: Paul Nunez, CalTech-JPL
CoI: Steve B Howell, NASA Ames Research Center
CoI: Elliott Horch, SCSU
CoI: Bertrand Mennesson, CalTech-JPL

Title: Investigation of Exozodiacal Dust Disk Host Stars

Abstract: Long baseline optical interferometry has shown that sub-micron hot dust may be relatively common in the inner regions of nearby main sequence stars. This dust stretches through the habitable zone and could confound the detection of exo-Earths. Dust should be extremely short-lived, and catastrophic events such as comet infall may account for the inordinate replenishment rates required. These mechanisms may produce emissions that are variable in time, which are currently being investigated (Scott et. al. in preparation). Validation of these inner dust disks is needed and speckle imaging is ideal to rule out binarity as a source of resolved excess. The PI is involved with an on- going exozodiacal survey at the CHARA Array that seeks to answer questions about the characteristics of the dust grains and the correlation of inner region dust with outer populations of dust by using long baseline optical interferometry to characterize 100 nearby stars. This proposal aims to validate candidates from this exozodiacal survey and other surveys by confirming that these interferometric detections are not due to binarity of the host star.

Program Type: Standard/NASA WIYN

Scheduled Nights:
Run 1 (2017A):  WIYNQ/NESSI -- 15hrs


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 >   2017A-0177

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