NOAO >   Observing Info >   Approved Programs >   2018A-0012

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Program Information for 2018A-0012


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: Warren Brown, Harvard-Smithsonian Center for Astrophysics

Title: A Detached, Eclipsing 40 Min Period Double White Dwarf Binary

Abstract: We have recently discovered a 40 min period eclipsing double white dwarf binary. Our discovery data are relatively poor for this relatively faint object, resulting in 10% and 100% uncertainties in the mass and radius of the secondary white dwarf. Here we request GMOS g and r band observations to constrain the physical parameters of both stars in the system, including their masses, radii, temperatures, and luminosities. General Relativity predicts a merger time of 20 Myr and a change in eclipse times of 7 s after 5 years and 30 s after 10 years. The proposed Gemini observations will provide the first precise measurement of the time-of-eclipse for this system.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  GEM-NQ/GMOSN -- 8.3hrs band 3 (GN-2018A-Q-317 )


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NOAO >   Observing Info >   Approved Programs >   2018A-0012

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