NOAO >   Observing Info >   Approved Programs >   2016A-0165

Small NOAO Logo

Program Information for 2016A-0165


PI: Judith Provencal, U. of Delaware, jlp@udel.edu
Address: Department of Physics and Astronomy, Sharp Laboratory, Newark, Delaware 19716 USA

CoI: D L Holdsworth, University of Central Lancashire
CoI: D W Kurtz, University of Central Lancashire
CoI: Harry Shipman, U. of Delaware

Title: Asteroseismology of the Highest Amplitude Rapidly Oscillating Ap Star

Abstract: 2MASS J19400781-4420093 (J1940) is a recent addition to the small family of rapidly oscillating Ap stars. This star exhibits a variable pulsation amplitude between 5 and 20 mmag in $B$-band observations, greater than that seen in any other roAp star. Given its large amplitude, J1940 has the potential to address questions concerning the mechanism behind amplitude variations in roAp stars, as well as the potential to apply asteroseismology to this class of objects. We are organizing an international Whole Earth Telescope campaign with J1940 as a primary target. Our goals include distinguishing between proposed sources of amplitude variations and detecting additional pulsation frequencies required for detailed asteroseisic analysis. Our proposed SOAR and SMARTS 0.9m observations will play a key role in the campaign.

Program Type: Standard/Galactic

Scheduled Nights:
Run 2 (2016A):  CT-0.9m/CFIM -- 6n on Jun 09 - Jun 14 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 >   2016A-0165

noaoprop-help@noao.edu

Small NOAO Logo