NOAO >   Observing Info >   Approved Programs >   2016B-0006

Small NOAO Logo

Program Information for 2016B-0006


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

CoI: John Antoniadis, University of Toronto
CoI: Alexandros Gianninas, U. of Oklahoma

Title: A Candidate Pulsating White Dwarf Companion to PSR J2234+0611

Abstract: We used Gemini to discover the first millisecond pulsar with a pulsating white dwarf companion, PSR J1738+0333. The white dwarf in J1738+0333 has a mass of 0.181(7) Msun, and is expected to have a thick surface hydrogen envelope. Antoniadis et al. (2016) have recently identified another millisecond pulsar with a potentially variable white dwarf companion, PSR J2234+0611. The white dwarf in this system has a mass of 0.275(8) Msun, and is expected to have a thin hydrogen envelope. We propose follow-up time-series photometry of this faint (g=22.2 mag) system to confirm pulsations and constrain its pulsation frequencies for the first time. If confirmed, PSR J2234 would be only the second pulsar + pulsating white dwarf system currently known. These observations offer an unprecedented opportunity to constrain the physical parameters, including the thickness of the surface hydrogen layer and therefore the cooling age, and interior structure of this white dwarf, and in turn, the mass and spin-down age of its pulsar companion.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2016B):  GEM-NQ/GMOSN -- 2hrs band 1 (GN-2016B-Q-13)


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 >   2016B-0006

noaoprop-help@noao.edu

Small NOAO Logo