Finding White Dwarfs with Transit Searches | Zendy

Alison J. Farmer | Zendy; Eric Agol | Zendy

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Finding White Dwarfs with Transit Searches

Author(s) -

Alison J. Farmer,

Eric Agol

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/375806

Subject(s) - white dwarf , transit (satellite) , physics , astrophysics , astronomy , planet , population , kepler , radius , binary number , stars , computer science , mathematics , public transport , demography , computer security , arithmetic , sociology , political science , law

We make predictions for the rate of discovery of eclipsing white dwarf-mainsequence (WD-MS) binaries in terrestrial-planet transit searches, taking theplanned Kepler and Eddington missions as examples. We use a populationsynthesis model to characterize the Galactic WD-MS population, and we findthat, despite increased noise due to stellar variability compared with thetypical planetary case, discovery of >100 non-accreting, eclipsing WD-MSsystems is likely using Kepler and Eddington, with periods of 2-20 days andtransit amplitudes of |delta m|~0.0003-0.00003 magnitudes. Follow-upobservations of these systems could accurately test the theoretical white dwarfmass-radius relation or theories of binary star evolution.Comment: 5 pages, 3 figures, one table, accepted for publication in ApJ. Minor changes to Galactic model and to discusion section; conclusions unchange

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