NOAO >   Observing Info >   Approved Programs >   2018A-0016

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Program Information for 2018A-0016


PI: Mukremin Kilic, U. of Oklahoma, mukreminkilic@gmail.com
Address: Department of Physics and Astronomy, Room 131 Nielsen Hall, Norman, OK, 73019-0225 USA

CoI: Pierre Bergeron, University of Montreal
CoI: Antoine Bedard, University of Montreal

Title: Double Degenerates in the Solar Neighborhood

Abstract: We have recently performed a detailed spectroscopic and photometric model atmosphere analysis of 158 white dwarfs for which precise trigonometric parallax measurements are available from the ground-based parallax programs and the Gaia Data Release 1. Based on this analysis, we identify 15 double degenerates in the solar neighborhood, six of which were previously confirmed to be in short period systems. The remaining nine objects are excellent binary candidates as well. Here we request Gemini time to obtain follow-up high-resolution spectroscopy of four spring targets to constrain the orbital periods and component masses of these unique binary systems and to confirm or rule out supernova Ia progenitors. We will use this sample to constrain the double degenerate merger rate in the Solar neighborhood. A comparison with the Type Ia supernovae rate will demonstrate whether the double degenerate channel contributes significantly to SNe Ia or not.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  GEM-N-SVC/GRACES -- 7.1hrs band 3 (GN-2018A-Q-316 )


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 >   2018A-0016

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