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A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author

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Presentation on theme: "A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author"— Presentation transcript:

1 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011

2 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011

3 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011

4 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary

5 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary

6 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe

7 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer

8 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer

9 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc

10 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc

11 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc

12 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

13 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

14 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

15 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability

16 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

17 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1

18 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1

19 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ

20 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until

21 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until.

22 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until..

23 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...

24 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change

25 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change

26 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change T, μ

27 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change μ

28 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change μ “Cataclysmic”

29 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability Ṁ 2 < Ṁ 1 ρ until...gas phase change μ “Cataclysmic”

30 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

31 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability

32 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability

33 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability

34 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Seen in optical through X-ray

35 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Seen in optical through X-ray P DNO ∼ s

36 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Seen in optical through X-ray P DNO ∼ s 10 3 ≲ |Ṗ DNO | -1 ≲ 10 7

37 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Seen in optical through X-ray P DNO ∼ s 10 3 ≲ |Ṗ DNO | -1 ≲ 10 7

38 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability

39 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations

40 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations

41 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations Seen in optical through X-ray

42 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations Seen in optical through X-ray P DNO ∼ s

43 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations Seen in optical through X-ray P DNO ∼ s 5 ≲ |Ṗ DNO | -1 ≲ 20

44 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations FT

45 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations FT

46 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations FT

47 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion disc Dwarf Nova Oscillations Variability Quasi-Periodic Oscillations

48 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

49 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

50 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability

51 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ?

52 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ?

53 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ?

54 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ?

55 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ? “Judge a man by his questions rather than by his answers.” - Pierre-Marc-Gaston, duc de Lévis ( ) Maximes et réflexions sur différents sujets de morale et de politique (Paris, 1808)

56 A study of DNOs and QPOs in Cataclysmic Variable stars Hannes Breytenbach ♋, Brian Warner, Patrick Woudt University of Cape Town ♋ author SKA Postgraduate Bursary Conference 2011 Binary WD primary + MS secondary Overfilling Roche Lobe Mass Transfer Accretion discVariability ? Thank you! “Judge a man by his questions rather than by his answers.” - Pierre-Marc-Gaston, duc de Lévis ( ) Maximes et réflexions sur différents sujets de morale et de politique (Paris, 1808)


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