Oscillations and Spins of Stars and Life

1. Oscillations and Spins of Stars and Life Alexander Kosovichev Stanford University

2. My first meeting with Wojtek: European Study Conference Oscillations as a Probe of the Sun's Interior": Catania, 20-24 June 1983 Wojtek

3. First meeting: Oscillations as a Probe of the Sun's Interior": Catania, 20-24 June 1983

4. Visit of Centrum Astronomiczne im. Mikołaja Kopernika (CAMK) in Warsaw for 3 months in 1986

5. CAMK was established in 1973 on occasion of 500th anniversary of Nicolaus Copernicus, and opened in 1978

6. Picture of youngest Wojtek (1973), I found on Internet

7. Computer equipment: PDP 11/45IBM PC XTs brought to CAMK by Phil Goode

8. Warsaw in 1986

9. Living with shock therapy

10. CAMK was the best place to live and work

11. Low Frequency Oscillations in Slowly Rotating Stars • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." ActaAstronomica37: 313. • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Two - Inertial Modes in the Solar Convective Envelope." ActaAstronomica37: 331. • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.

12. Low Frequency Oscillations in Slowly Rotating Stars • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). Inertial Modes Trapped in the Solar Convective Envelope, Advances in Helio- and Asteroseismology, Proceedings of the Symposium held 17-11 July 1986, in Aarhus, Denmark. Edited by J. Christensen-Dalsgaard and S. Frandsen. IAU Symposium, No. 123. Dordrecht: D. Reidel Publishing Co., p.117, 1988

13. Low Frequency Oscillations in Slowly Rotating Stars: Proc. IAU Sym. 123 -shortest paper I ever published

14. Primary question: What happens to g-modes when their frequencies become comparable with stellar rotation rate? ? W/2p

16. N2/W2 in Standard Solar Model S W2 > N2

21. g-modes radial wavenumber inertial modes

22. rotational splitting r-mode g-modes l(l+1)/2m radial wavenumber inertial modes

23. Calculations of the frequency spectra and mode eigenfunctions showed that the oscillation amplitude is concentrated at high latitudes.

24. Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.

28. ADS read/citation statistics

30. LMXB: low-mass X-ray binaries

31. Low Frequency Oscillations in Slowly Rotating Stars • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." ActaAstronomica37: 313. • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Two - Inertial Modes in the Solar Convective Envelope." ActaAstronomica37: 331. • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.

32. Inside the Sun, Versailles 1989

33. Inside the Sun, Versailles 1989

34. Inside the Sun, Versailles 1989

35. Life twists IoA, Cambridge, 1990-94 SOHO, Stanford, 1994-2010 Solar Dynamic Observatory, Stanford 2010 -

36. Big Bear Solar ObservatoryNew Solar Telescope 1.6m clear aperture – world largest solar telescope

37. Great Wojtek’s lessons • Do not afraid solving difficult problems • Never try to solve problems that are too difficult

38. Santa Fe 2009 Thanks, Wojtek!