TY - JOUR
T1 - SDSS J1152+0248
T2 - An eclipsing double white dwarf from the Kepler K2 campaign
AU - Hallakoun, N.
AU - Maoz, D.
AU - Kilic, M.
AU - Mazeh, T.
AU - Gianninas, A.
AU - Agol, E.
AU - Bell, K. J.
AU - Bloemen, S.
AU - Brown, W. R.
AU - Debes, J.
AU - Faigler, S.
AU - Kull, I.
AU - Kupfer, T.
AU - Loeb, A.
AU - Morris, B. M.
AU - Mullally, F.
N1 - Publisher Copyright:
© 2016 The Authors.
PY - 2016/2/22
Y1 - 2016/2/22
N2 - We report the discovery of the sixth known eclipsing double white dwarf (WD) system, SDSS J1152+0248, with a 2.3968 ± 0.0003 h orbital period, in data from the Kepler Mission's K2 continuation. Analysing and modelling the K2 data together with ground-based fast photometry, spectroscopy, and radial-velocity measurements, we determine that the primary is a DA-type WD with mass M1 = 0.47 ± 0.11M⊙, radius R1 = 0.0197 ± 0.0035 R⊙, and cooling age t1 = 52 ± 36 Myr. No lines are detected, to within our sensitivity, from the secondary WD, but it is likely also of type DA. Its central surface brightness, as measured from the secondary eclipse, is 0.31 of the primary's surface brightness. Its mass, radius, and cooling age, respectively, are M2 = 0.44 ± 0.09M⊙, R2 = 0.0223+0.0064 -0.0050 R⊙, and t2 = 230 ± 100 Myr. SDSS J1152+0248 is a near twin of the double-lined eclipsing WD system CSS 41177.
AB - We report the discovery of the sixth known eclipsing double white dwarf (WD) system, SDSS J1152+0248, with a 2.3968 ± 0.0003 h orbital period, in data from the Kepler Mission's K2 continuation. Analysing and modelling the K2 data together with ground-based fast photometry, spectroscopy, and radial-velocity measurements, we determine that the primary is a DA-type WD with mass M1 = 0.47 ± 0.11M⊙, radius R1 = 0.0197 ± 0.0035 R⊙, and cooling age t1 = 52 ± 36 Myr. No lines are detected, to within our sensitivity, from the secondary WD, but it is likely also of type DA. Its central surface brightness, as measured from the secondary eclipse, is 0.31 of the primary's surface brightness. Its mass, radius, and cooling age, respectively, are M2 = 0.44 ± 0.09M⊙, R2 = 0.0223+0.0064 -0.0050 R⊙, and t2 = 230 ± 100 Myr. SDSS J1152+0248 is a near twin of the double-lined eclipsing WD system CSS 41177.
KW - Binaries: eclipsing
KW - Methods: statistical
KW - Stars: individual: SDSS J115219.99+024814.4
KW - Techniques: radial velocities
KW - White dwarfs
UR - https://www.scopus.com/pages/publications/84963725221
U2 - 10.1093/mnras/stw364
DO - 10.1093/mnras/stw364
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AN - SCOPUS:84963725221
SN - 0035-8711
VL - 458
SP - 845
EP - 854
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -