THREE NEW ECLIPSING WHITE-DWARF-M-DWARF BINARIES DISCOVERED IN A SEARCH FOR TRANSITING PLANETS AROUND M-DWARFS

We present three new eclipsing white-dwarf/M-dwarf binary systems discovered during a search for transiting planets around M-dwarfs. Unlike most known eclipsing systems of this type, the optical and infrared emission is dominated by the M-dwarf components, and the systems have optical colors and dis...

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Bibliographic Details
Published in:The Astrophysical journal 2012-10, Vol.757 (2), p.133-14
Main Authors: Law, Nicholas M., Kraus, Adam L., Street, Rachel, Fulton, Benjamin J., Hillenbrand, Lynne A., Shporer, Avi, Lister, Tim, Baranec, Christoph, Bloom, Joshua S., Bui, Khanh, Burse, Mahesh P., Cenko, S. Bradley, Das, H. K., Davis, Jack. T. C., Dekany, Richard G., Filippenko, Alexei V., Kasliwal, Mansi M., Kulkarni, S. R., Nugent, Peter, Ofek, Eran O., Poznanski, Dovi, Quimby, Robert M., Ramaprakash, A. N., Riddle, Reed, Silverman, Jeffrey M., Sivanandam, Suresh, Tendulkar, Shriharsh P.
Format: Article
Language:English
Subjects:
ALGORITHMS
ASTRONOMY
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BINARY STARS
DATA ANALYSIS
ECLIPSE
HYDROGEN
JUPITER PLANET
LEAST SQUARE FIT
MASS
OPTICS
PHOTOMETRY
PHOTON EMISSION
RADIAL VELOCITY
SATELLITES
STELLAR ATMOSPHERES
VISIBLE RADIATION
WHITE DWARF STARS
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Summary:We present three new eclipsing white-dwarf/M-dwarf binary systems discovered during a search for transiting planets around M-dwarfs. Unlike most known eclipsing systems of this type, the optical and infrared emission is dominated by the M-dwarf components, and the systems have optical colors and discovery light curves consistent with being Jupiter-radius transiting planets around early M-dwarfs. We detail the PTF/M-dwarf transiting planet survey, part of the Palomar Transient Factory (PTF). We present a graphics processing unit (GPU)-based box-least-squares search for transits that runs approximately 8 x faster than similar algorithms implemented on general purpose systems. We use the Robo-AO laser guide star adaptive optics system to tentatively identify one of the objects as a triple system. We also use high-cadence photometry to put an upper limit on the white-dwarf radius of 0.025 R sub([middot in circle]) (95% confidence) in one of the systems. We present several ways to rapidly distinguish these binaries from transiting planet systems.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/757/2/133