1. Cataclysmic Variables in K2 Paula Szkody ( U Washington ), Zhibin Dai ( Yunnan Obs ), Peter Garnavich ( Notre Dame ), Mark Kennedy ( ND+Ireland )

2. A Cataclysmic Variable : is a close binary system has a white dwarf primary has a cool low mass secondary actively transfers mass

3. Disk System Polar Intermediate Polar LARP CV Types Steve Howell outbursts high,low states mostly high state all low state

4. Examples from CSS sampling rate Low accretion rateHigh accretion rate

5. Kepler field sampling V344 Lyr Cannizzo et al. 2012, ApJ, 747,117

6. K2 Advantages for CVs: Details of outbursts (disks) Orbital periodicities (evolution) Orbital accretion changes (spots) Spin Periods of WDs in IPs (curtains) Samples different locations in galaxy

7. Outbursts--tests of disk theory Shapes-decline, peak,width Recurrence times Pre-cursors

9. K2-0

10.  parabola-like decay of outburst  linear and slow transit between outburst and quiescence.  quiescence covering at least 28 days shows typical flickering behavior. ~ 1 mag ~ 4.5 days 28 days USNO Dwarf nova K2-0 Changes in shape during late decline Flickering at quiesence

11.  The ends of normal outbursts are different. A smooth and fast variation is shown in UV Gem, while a rough and slow linear transit with duration of 4.5 days in USNO.  V344 Lyr is a SU UMa type dwarf nova with an orbital period of 2.1 hr, same as UV Gem. V344 Lyr 2.1 hr UV Gem USNO From Kepler data Cannizzo et al. 2012

12. K2-1 TW Vir Pre-cursor

13. K2-1 RXJ1112

14. MLS0342+17MLS0403+21 K2-4

15. MLS0359+17 (SDSS0359 +17) K2-4

16. e.g. V1159 Ori – 45 day supercycle ( Szkody et al. 1999, ApJ, 521, 362 ) Is MLS0359 a rare supercycle system?

17. Orbital Variations Eclipses Hot spots Reflection effects

18. P=1.23 d eclipses 5 days K2-2

19. K2-0 SDSSJ0632+25

20. 7.78 hrs 3.89 hrs SDSSJ0632

22. K2-1 WD1144+011 DA+dMe Pre-CV?

23. Intermediate Polars WD spin period Amplitudes in opt/vs UV Variability over time

24. K2-3 Intermediate Polar FO Aqr 1 day of SC observations P orb = 4.85 hr P spin = 20.9 min

25. P orb P spin

26. FO Aqr

27. Amplitude of spin lowest at phase 0, highest at 0.7

28. Summary K2 LC great for testing disk, outburst theories, providing orbital periods, accretion changes during quiescence K2 SC vital for eclipse, spin studies and their variations on daily, weekly, monthly timescales